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Tag Archives: Clinical Pathology Selected Abstracts

Clinical pathology selected abstracts

March 2024—Despite research into colorectal cancer screening and clinical experience, screening uptake remains low. Colorectal cancer (CRC) screening involves noninvasive tests, such as a fecal immunochemical test (FIT) and stool-based DNA tests, as well as invasive tests, such as colonoscopy. The latter has the best performance characteristics for early cancer and adenoma detection. The average adherence to CRC screening is 60.6 percent for U.S. patients aged 50 to 75 years, which is well below the 80 percent goal for adherence set by the National Colorectal Cancer Roundtable and American Cancer Society. Offering stool-based tests to patients who refuse colonoscopy results in only a modest increase in adherence, to 67 percent.

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Clinical pathology selected abstracts

February 2024—Patients receiving a pathology report may have many outstanding questions that can cause anxiety and confusion. The 21st Century Cures Act has increased patients’ access to pathology reports via delivery to patient portals. However, reports sent without further explanation can exacerbate the anxiety and confusion. Many health care institutions are creating new communication methods to help patients interpret these reports and develop a better understanding of their health status. One such approach is the pathology explanation clinic (PEC), which is an interactive visit between patients and pathologists to discuss the pathology report and review the patient’s slides.

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Clinical pathology selected abstracts

January 2024—People respond differently to SARS-CoV-2 infection, with some having a very severe clinical course and sequelae while others recover quickly. Several research studies have used laboratory data to identify patient populations most at risk for severe outcome from COVID-19. However, many of these studies were conducted in China and did not represent the demographics of the U.S. population. Among the drawbacks of these studies were that most analyzed variance between two patient groups, yet statistical differences don’t always correlate with clinically useful predictions. Furthermore, these studies used data from throughout patients’ disease course, and clinicians would like to identify patients at risk during their initial interaction.

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Clinical pathology selected abstracts

December 2023—Efforts to develop biomarkers that help predict risk factors for preeclampsia/eclampsia and to better understand the trends and implications related to new-onset hypertensive disorders in pregnancy have grown. New-onset hypertension arising during pregnancy (gestational hypertension and preeclampsia/eclampsia) is associated with coronary heart disease, heart failure, stroke, and other cardiovascular-related mortality. Hypertensive disorders of pregnancy have grown into major public health problems that contribute to maternal morbidity, mortality, and future risk of cardiovascular disease. The authors conducted a study to describe contemporary trends in new-onset hypertensive disorders of pregnancy in the United States. They conducted a serial cross-sectional analysis of 51,685,525 live births to women aged 15 to 44 years, from 2007 to 2019, using the Centers for Disease Control and Prevention’s natality database.

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Clinical pathology selected abstracts

November 2023—Among the many reasons unnecessary laboratory tests are ordered in a hospital are preselected orders on order sets, clinician habits, and trainee concerns. Laboratory tests are among the highest volume procedures performed in inpatient hospital care. Excessive use of these tests can lead to patient discomfort as a result of unnecessary phlebotomy and contribute to iatrogenic anemia and increased risk of bloodstream infections. It can also contribute to the rising cost of medical care. Many laboratory stewardship programs have been developed to improve how clinicians order and use lab tests.

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Clinical pathology selected abstracts

October 2023—Several large randomized controlled trials have shown the safety of tolerating hemoglobin levels as low as 7 g/dL in critically ill hemodynamically stable children. These trials have led to recent guidelines advocating for restrictive transfusion therapy, which is significantly changing practices in pediatric critical care.

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Clinical pathology selected abstracts

September 2023—Approximately 30 percent of U.S. employees report that they have been bullied in the workplace, and these numbers are even higher for remote workers. Bullying is defined as any act or situation in which someone is subjected to recurrent, systematic, serious negative or hostile behavior and long-lasting acts designed to oppress or abuse another person. This behavior may include belittling, humiliating, personally attacking, verbally criticizing, or intentionally excluding a coworker. Bullying can harm both the target of the attack and the organization that employs the bully and the targeted person. The potential negative effects on an organization can be high staff turnover, a decrease in employee performance and productivity, and an increase in errors and medical mistakes.

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Clinical pathology selected abstracts

August 2023—Burnout has been reported to affect as many as 44 percent of physicians. It is listed in the International Classification of Diseases 11th Revision (ICD-11) and has been attributed to chronic workplace stress, emotional exhaustion, depersonalization, and a low sense of personal accomplishment. A social psychologist created the Maslach Burnout Inventory (MBI) tool to measure degrees of burnout. The 2018 Canadian Medical Association Physician Health Survey of 3,000 members found an overall burnout rate of 30 percent, and 28 percent of pathologists who responded to that survey indicated they were burned out. Physician burnout can have a significant negative impact on patient care, including on the amount of medical errors. It has been estimated that physician burnout costs the Canadian health care system CAD $185 million due to early retirement and CAD $27.9 million due to reduced professional work effort.

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Clinical pathology selected abstracts

July 2023—Hemolytic disease of the fetus and newborn is caused by maternal immunoglobulin G crossing the placenta and binding to fetal RBC antigens. In severe cases, it results in fetal or neonatal anemia, edema, hepatosplenomegaly, and death. In China, antibodies to the ABO blood group system are the most common cause of hemolytic disease of the fetus and newborn (HDFN) and account for 85.3 percent of cases. This is followed by antibodies to the Rh blood group system, which account for 14.6 percent of HDFN cases. Other blood group systems, including Duffy, Kidd, and MNS, may also cause HDFN.

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Clinical pathology selected abstracts

June 2023—Studies that address whether the incidence of dementia in the U.S. population is declining are inconsistent. They cannot establish conclusive trends in disease rates. Most studies are hard to interpret due to small sample sizes or use of hospital-based autopsies. Understanding trends in dementia is necessary from a public health perspective and for planning interventions. Therefore, the authors conducted a study to characterize trends in pathways underlying dementia using two U.S. cohorts focused on aging and dementia.  

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Clinical pathology selected abstracts

May 2023—Several studies have evaluated the brain protective role of the Mediterranean-DASH (Dietary Approaches to Stop Hypertension) Intervention for Neurodegenerative Delay (MIND) diet. The studies have shown that the MIND diet can slow cognitive decline, reduce rates of cognitive impairment, and reduce Alzheimer’s and Parkinson’s disease. Because obesity is a global epidemic, there is an interest in determining if the MIND diet may also have a beneficial effect on cardiovascular disease mortality, central or general obesity, metabolic syndrome and its components, and cardiac remodeling. The authors conducted a cross-sectional study to examine the relationship between the MIND diet and other metabolic risk factors, including lipids, glycemic indicators, and mental health, in obese people. The study included 339 obese people (body mass index of 30 kg/m2 or more) who were between 20 and 50 years old and lived in Tabria or Tehran, Iran.  

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Clinical pathology selected abstracts

April 2023—Cancer is the second leading cause of death globally. While great progress is being made in personalized cancer treatments, early detection and diagnosis is critical to reduce mortality and improve the effectiveness of treatment. Guidelines for preventative screening are available but require a large public health intervention strategy. Having “one-stop-shop” screening for multiple cancers at one time would reduce the barriers to participating in cancer screening programs and may lead to greater numbers of screening participants. An integrated cancer prevention center (ICPC) was developed in 2006 at the Tel Aviv Medical Center, in Israel, to screen for all cancers that the U.S. Preventive Services Task Force recommends be screened, including breast, colon, cervical, lung, skin, ovarian, uterine, thyroid, testicular, oropharyngeal, and prostate cancer.  

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Clinical pathology selected abstracts

March 2023—Coagulation screening prior to surgery for patients without a history of a bleeding disorder is controversial. Studies have recommended routine screening of prothrombin time/International Normalized Ratio (PT/INR) and activated partial thromboplastin time (aPTT) to reduce the risk of perioperative and postoperative hemorrhage. Other studies have questioned the value of coagulation screening tests, such as INR, aPTT, and platelet count, because it is rare to detect an abnormal value in patients undergoing elective surgeries. Many professional society guidelines, such as those of the American Society of Anesthesiologists and British Committee for Standards in Hematology, advise against routine perioperative coagulation screening prior to surgery for patients who do not have a clinical history of abnormal bleeding, medical history of comorbidity, or bleeding disorders. The authors conducted a study in which they examined the association between abnormal coagulation profile and risk of transfusion following common elective surgery in patients who did not have bleeding disorders. They used the National Surgical Quality Improvement Program (NSQIP) database for their retrospective cohort study, which focused on adult patients across multiple disciplines who underwent common surgical procedures between 2004 and 2018.  

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Clinical pathology selected abstracts

February 2023—Fetal and neonatal alloimmune thrombocytopenia is the most common cause of intracranial hemorrhage in term infants with thrombocytopenia. It often presents as severe thrombocytopenia in the newborn or a spontaneous intracranial hemorrhage in a fetus in an uncomplicated pregnancy. Fetal and neonatal alloimmune thrombocytopenia (FNAIT) is caused by maternal antibodies against paternal platelet antigens, which cross the placenta and destroy fetal platelets. Studies have shown that FNAIT is underdiagnosed in pregnancies. However, primigravida screening for FNAIT is not performed in the United States.

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Clinical pathology selected abstracts

November 2022—Exposure to lead may cause severe illness in children, including neurological damage, organ failure, and even death. The Centers for Disease Control and Prevention and other agencies recommend routine testing for blood lead levels (BLL) as part of a well-child examination to identify elevated levels and, subsequently, eliminate exposure to lead and initiate therapeutic interventions.

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Clinical pathology selected abstracts

October 2022—Cardiovascular health is often linked to dementia, and compelling evidence indicates that there are modifiable risk factors for dementia, knowledge of which may also benefit vascular health. In previous studies, hypercholesterolemia and cardiovascular pathology were associated with the apolipoprotein E (APOE) ε4 genotype and cognitive function.

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Clinical pathology selected abstracts

September 2022—Clinical laboratory workforce shortages are an issue, in large part because it is difficult to find qualified testing personnel. Pathology residents present a solution to this problem because MD and DO residents who have current training certificates or medical licenses and who are trainees in pathology or other specialties can qualify to perform high-complexity testing.

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Clinical pathology selected abstracts

July 2022—A complete blood count with a white blood cell differential (CBCD) is often ordered when a CBC alone would suffice. Even though a CBCD can be performed with automated technology, it requires more reagents than a CBC. Furthermore, if an automated CBCD is flagged, a laboratory will perform a manual WBC differential, adding to labor and material costs.

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Clinical pathology selected abstracts

September 2021—Colorectal cancer is the third leading cause of cancer death for men and women, with approximately 52,980 deaths projected this year. Although colorectal cancer is most frequently diagnosed in adults between the ages of 65 and 74 years, about 10.5 percent of new colorectal cancer cases will occur in those younger than 50 years of age.

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Clinical pathology selected abstracts

August 2021—The primary target organ of the SARS-CoV-2 virus is the lung. The virus invades endothelial cells through angiotensin-converting enzyme 2 receptors, which are found throughout the body. There are multiple markers of abnormal coagulation and hemostasis activation in patients with COVID-19 that signal a risk of thromboembolic complications.

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Clinical pathology selected abstracts

July 2021—Pathologists play a key role in molecular and genomics testing, so pathologists-in-training should demonstrate an understanding of genetics concepts and the utility of molecular and genomic testing in patient care. A list of published competencies for training includes determining sample adequacy, ensuring that appropriate molecular tests are ordered, and effectively communicating genomic testing results through pathology reports and interdisciplinary teams.

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Clinical pathology selected abstracts

June 2021—Adverse events reported following administration of the ChAdOx1 nCoV-19 AstraZeneca vaccine were similar to those reported for the Johnson & Johnson/Janssen COVID-19 vaccine. The latter was paused in the United States in April due to concerns about thrombocytopenia, cerebral venous thrombosis, and a heparin-induced thrombocytopenia (HIT)-like syndrome that was a rare occurrence post-vaccination in women under the age of 60.

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Clinical pathology selected abstracts

April 2021—The incidence of cardiovascular disease and coronary heart disease is disproportionately higher among African-Americans compared with non-Hispanic whites. It has been hypothesized that genetic variation is associated with these higher rates of cardiovascular disease (CVD) and coronary heart disease (CHD) among this race.

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Clinical pathology selected abstracts

March 2021—Convalescent plasma, with neutralizing and non-neutralizing anti-viral antibodies, has been used to treat COVID-19 patients. Plasma is collected from people who have recovered from the disease and transfused to those who are infected. Data have shown improvements in patients with severe infections who are transfused with COVID-19 convalescent plasma. The majority of people who have COVID-19 will demonstrate IgM and IgG antibodies within two weeks of symptom onset. These antibodies have specificity toward the receptor-binding domain (RBD) and spike protein viral epitopes that correspond to virus neutralization.

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Clinical pathology selected abstracts

February 2020—SARS-CoV-2 is transmitted through respiratory droplets, close person-to-person contact, and infected surfaces. Those with COVID-19 often present with fever and respiratory symptoms, and diagnosis relies on detecting the virus through specimens from the upper and lower respiratory tract. However, an increasing number of patients are exhibiting such gastrointestinal symptoms as diarrhea, vomiting, and abdominal pain. A growing number of studies are reporting the presence of SARS-CoV-2 RNA in stool samples and anal swabs, generating interest in research focused on a fecal-oral route of transmission. The authors conducted a study to assess the clinical relevance of testing stool samples and anal swabs for SARS-CoV-2 and to provide a critical overview of literature addressing possible fecal-oral transmission.

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Clinical pathology selected abstracts

January 2021—Annual expenditures for clinical laboratory testing account for approximately $71.6 billion of health care costs and represent about 2.4 percent of all health care spending. While laboratory testing is critical, recommendations of the Choosing Wisely initiative focus on reducing laboratory costs and unnecessary testing, in part through dialogue between physicians and patients. Specialty societies widely accept and participate in Choosing Wisely recommendations, but outcomes of the initiative are largely unknown. The American Society for Clinical Pathology put forth 25 recommendations for Choosing Wisely, of which the 13th recommendation stated that serum lipase is the preferred test for diagnosing acute pancreatitis because lipase peaks by 24 hours and remains elevated for eight to 14 days. It was also recommended that serum amylase tests not be ordered with serum lipase tests because one or the other is sufficient for the diagnosis.

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Clinical pathology selected abstracts

December 2020—The National Academy of Medicine estimated that approximately 30 percent of U.S. health care spending constitutes nonvalue-added waste. This waste may be generated through unnecessary laboratory tests and services, inefficiency of care delivery, ex­cessive administrative costs, and high prices. A goal of medical educators is to inform undergraduate medical students about health care management and health care delivery to make them better stewards of cost-effective, high-value care (HVC). The authors described the results of a needs analysis to inform the design of an online case-based educational tool for teaching laboratory stewardship to medical students. To this end, they conducted a needs assessment that included semi-structured interviews of core clerkship directors and residency program directors, a national survey of the Undergraduate Medical Educators Section of the Association of Pathology Chairs, and a review of existing online resources for teaching HVC. Their results showed that all of the core clerkship directors and residency program directors thought that teaching laboratory stewardship as part of the undergraduate medical education (UME) curriculum was important. The two major themes that emerged from the analysis to enhance laboratory stewardship education were appropriate test ordering and interpretation. The authors also found several organizations that provide HVC education through online modules or clinical cases.

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Clinical pathology selected abstracts

November 2020—Smoking is a leading cause of death in the United States and is associated with many postoperative complications, including increased transfusion needs. Toxins in tobacco that create free radicals that damage the arterial walls and make them more susceptible to rupture and bleeding may be the link between smoking and surgical bleeding. Smoking also impairs tissue healing after surgery, most likely due to reduced oxygenation and altered function of inflammatory cells during the healing process. This may impact bleeding risk in the immediate postoperative period. The authors conducted a study in which they queried the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) Participant Use Data File 2007–2016, which contained data from up to 680 U.S. hospitals, to test the hypothesis that smoking is associated with a higher risk of bleeding in various surgical procedures.

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Clinical pathology selected abstracts

October 2020—Early in the COVID-19 pandemic, some reports linked ABO blood type to severity of the disease and test positivity. Among these were reports that blood type A was associated with a higher risk for SARS-CoV-2 infection and blood group O with a lower risk of infection and mortality. However, there is a paucity of data regarding the relationship between ABO blood type and severity of COVID-19. Therefore, the authors conducted a large multi-institutional observational study to determine if there is an association between ABO blood type and severity of COVID-19 and if those with specific blood types are more likely to test positive for the disease. For the study, they used a large multi-institutional database of adult patients who tested positive for SARS-CoV-2 at five major hospitals in Massachusetts from March 6 to April 16. The authors evaluated hospitalization, intubation, and death for an association with blood type.

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Clinical pathology selected abstracts

September 2020—The clinical features and immune responses of people infected with SARS-CoV-2 who are asymptomatic are under investigation since people without disease symptoms can unknowingly spread the virus. As of Aug. 3, there were 17,965,128 confirmed COVID-19 cases worldwide, 4,749,138 of which were in the United States. The majority of those with SARS-CoV-2 infection have mild to severe respiratory illness with fever, cough, and shortness of breath, which appears two to 14 days after exposure. The authors conducted a study in which they described the epidemiological and clinical characteristics, viral levels, and immune responses in 37 asymptomatic people to better understand the clinical features and immune responses of people who are infected with SARS-CoV-2 and asymptomatic. The 37 asymptomatic people, all in the Wanzhou district of China, were diagnosed with RT-PCR–confirmed SARS-CoV-2 infections but had no relevant clinical symptoms in the preceding 14 days or while quarantined at the government-designated hospital for centralized isolation in Wanzhou.

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Clinical pathology selected abstracts

August 2020—Bacterial contamination of platelets continues to be an important cause of transfusion-associated morbidity and mortality. From 2001 to 2016, there were 51 deaths reported to the FDA due to transfusion of apheresis products contaminated with bacteria, including 30 deaths since testing for bacterial contamination was mandated in 2004. This mandate was implemented through primary culture of single-donor apheresis platelets in 2004 and then prestorage pooled platelets (PSPPs) in 2007. The authors conducted a study to compare the platelet bacterial contamination and septic transfusion rates before and after introducing testing of pooled and apheresis platelets by primary culture over an extended time period. They cultured platelet aliquots at issue and evaluated transfusion reactions.

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Clinical pathology selected abstracts

July 2020—The College of American Pathologists launched the Pathology and Laboratory Quality Center for Evidence-Based Guidelines in 2009 to develop and promote laboratory practice guidelines (LPGs) using the National Academy of Medicine’s (NAM) standards for developing trustworthy guidelines. The center has published 17 evidence-based LPGs, including updated versions, using NAM’s criteria. In 2013, the CAP was awarded a five-year cooperative agreement grant from the Centers for Disease Control and Prevention to increase the effectiveness of its LPGs. The intent of the agreement was to assess awareness and adoption of two CAP LPGs: IHC assay validation (IHC VAL) and initial workup of acute leukemia (AL).

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Clinical Pathology Selected Abstracts

June 2020—More than 1.7 million new diagnoses of cancer occur in the United States each year, and they are almost exclusively made by pathologists who evaluate patient specimens and issue a written diagnostic report. These patients often are not given the opportunity to talk with the pathologist who made the diagnosis or view their tissue through a microscope. There is little published data on patient-pathologist consultation programs in which patients can review their reports and slides with the pathologist. In addition, the number of patients who may be interested in this service is not known. The authors conducted a study to quantify patients’ interest in patient-pathologist consultation programs and qualitatively analyze their motivations for interest or disinterest.

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Clinical Pathology Selected Abstracts

May 2020—Laboratory costs represent approximately three to four percent of overall health care expenses but drive 70 to 80 percent of decisions made by physicians. One way to control laboratory testing expenditures is through appropriate utilization. For example, thyroid and antinuclear antibody (ANA) testing have reliable initial screening tests, yet specialized testing is overutilized for both. In 2000 guidelines, the College of American Pathologists and American College of Rheumatology established that the ANA screen by immunofluorescence in the setting of a negative result is sufficiently sensitive not to perform further testing with subserologies and that thyroid-stimulating hormone (TSH) is a sensitive marker of thyroid function and can often be used without further testing with a normal TSH.

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Clinical Pathology Selected Abstracts

April 2020—An outbreak of pneumonia occurred in Wuhan, Hubei province, China, in December 2019. A novel coronavirus was identified as the causative agent and named SARS-CoV-2 by the World Health Organization (WHO). The disease, COVID-19, is considered a relative of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). SARS-CoV-2–infected patients presented with a dry cough, dyspnea, fever, and bilateral lung infiltrates.

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Clinical Pathology Selected Abstracts

March 2020—U.S. guidelines for human papillomavirus vaccination are 11 to 12 years, with a catch-up vaccination up to age 26 for women and 21 for men. The FDA recently expanded the approved age for HPV vaccination in adult women and men from nine through 45 years. The changes are based on safety data and efficacy as well as potential incremental population-level health benefits. The authors conducted a study to evaluate the added population-level effectiveness and cost-effectiveness of extending the current U.S. HPV vaccination program to women ages 27 through 45 years and men ages 22 through 45 years. They used HPV-ADVISE (agent-based dynamic model for vaccination and screening evaluation), a model for HPV infection and associated diseases specific to U.S. data.

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Clinical Pathology Selected Abstracts

Blood utilization and transfusion reactions in pediatric patients transfused with platelets

February 2020—Even with advances in donor screening and infectious disease testing, the risk of transfusion-transmitted infections continues to be a concern. The FDA has approved a pathogen-reduction system for single-donor platelets, called Intercept Blood System (Cerus Corp.), to treat thrombocytopenic adult and pediatric patients.

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Clinical pathology selected abstracts

Use of thromboelastography to guide blood product transfusion
January 2020—Thromboelastography and rotational thromboelastometry provide insights into blood clot development, stabilization, and dissolution. The coagulation tests provide a tracing through the clotting process, but although they are similar, they are not interchangeable.

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Clinical pathology selected abstracts

Intraoperative red blood cell transfusion and mortality after cardiac surgery
December 2019—Patients with underlying cardiac disease are at risk for myocardial ischemia if they have untreated anemia at the time of cardiac surgery. During surgery, ongoing blood loss and hemodilution as a result of cardiopulmonary bypass (CPB) cause low hemoglobin levels. The optimal transfusion trigger for cardiac surgery patients continues to be debated. A more restrictive RBC transfusion strategy is used in patients with stable cardiovascular disease and is considered safe.

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Clinical pathology selected abstracts

Intensive versus standard blood pressure control with cerebral white matter lesions
November 2019—The effect of intensive systolic blood pressure control on brain health is uncertain, despite its efficacy for reducing cardiovascular morbidity and mortality. However, hypertension is a primary risk factor for cerebral small vessel ischemic disease (SVID), especially in developing white matter lesions (WML). The pathogenesis of Alzheimer disease and related dementia is known to be associated with SVID and cognitive decline.

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Clinical pathology selected abstracts

Cardiovascular events and mortality in white coat hypertension
October 2019—Hypertension is the most common preventable cause of disability and premature mortality worldwide. It is often diagnosed using in-office blood pressure measurements. More recent guidelines encourage out-of-office blood pressure monitoring, such as at-home self-monitoring, for diagnosing and managing hypertension.

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Clinical pathology selected abstracts

June 2019—Dietary patterns during adulthood and cognitive performance in midlife. Cognitive impairment is associated with an increased risk of mortality, disability, and late-life dementia, which contributes to the rising costs of health care. Several studies have demonstrated cognitive decline in midlife, and some data have linked this decline to cardiovascular disease risk factors or a more sedentary lifestyle. Diet is a modifiable exposure, but few studies have analyzed the risk of cognitive impairment due to dietary factors.

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Clinical pathology selected abstracts

May 2019—Optimization of laboratory ordering practices for CBC with differential: Over 5 billion laboratory tests are performed in the United States each year, and more than 20 percent are considered unnecessary. The American Board of Internal Medicine Foundation initiated the Choosing Wisely campaign in 2012 to increase awareness of wasteful or unnecessary medical tests, procedures, and treatments. Studies have shown that tests ordered without a clear rationale not only waste resources but are also a source of iatrogenic anemia, which has been associated with increased blood transfusions, lengths of stay, and mortality.

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Clinical pathology selected abstracts

April 2019—Trauma resuscitation considerations: gender as a biological variable: Sex dimorphisms in coagulation are well established, with females manifesting a more hypercoagulable profile, but the relationship between sex dimorphism in coagulation and trauma outcomes has not been investigated. Trauma-induced hemorrhage remains a leading cause of early post-injury death.

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Clinical pathology selected abstracts

Prostate cancer screening with PSA test: systematic review and meta-analysis

December 2018—Prostate cancer is the second most common cancer and the fifth leading cause of cancer-associated mortality among men worldwide. The use of serum prostate-specific antigen (PSA) to screen for prostate cancer is intended to detect the cancer at an early stage to reduce overall and disease-specific mortality. However, evidence that PSA screening for prostate cancer saves lives is somewhat lacking.

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Clinical pathology selected abstracts

Preparing for passage of regulatory requirements for laboratory-developed tests: November 2018—The FDA has raised concerns, in recent years, about several high-risk laboratory-developed tests (LDTs), including a concern that patients may undergo unnecessary treatment or delay or forego treatment due to the inaccuracy of such tests. Other agencies have also challenged the validity, accuracy, oversight, and safety of LDTs, a subset of IVDs that are intended for clinical use and designed, manufactured, and used within a single laboratory.

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Clinical pathology selected abstracts

RT-PCR detection of B. microti parasites using BMN antigens as amplification targets October 2018—Babesia microti infection, which is transmitted through the bite of an infected tick, is a growing health concern and continues to be a threat to the blood supply, with 22 states having reported cases of babesiosis in 2014. While most healthy adults with Babesia infection are asymptomatic or present with mild symptoms, including fever, fatigue, and anemia, babesiosis can be severe or fatal in neonates, the elderly, and immunosuppressed individuals.

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Clinical pathology selected abstracts

Outcomes of an audit of repeat lab testing at an academic medical center
September 2018—Overutilization of laboratory tests increases health care costs and may lead to false-positive test results and ambiguous findings. Unnecessary testing can result from a single order from a provider, an automated function in an order set, or a combination of the two.

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Clinical Pathology Abstracts

Association of perioperative RBC transfusions with venous thromboembolism
August 2018—Hospital-associated venous thromboembolism is a major cause of morbidity and mortality, resulting in 100,000 to 200,000 deaths annually. Surgery can lead to a proinflammatory state and be a prothrombotic stimulus for venous thromboembolism (VTE). General anesthesia, as well as red blood cells transfused in the perioperative setting, is considered an independent risk factor for VTE.

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Clinical Pathology Abstracts

Trends in perioperative RBC transfusion from index cases in five surgical specialties
July 2018—In recent years, greater attention has been given to patient blood management. While contemporary national guidelines recommend restrictive red blood cell transfusion, it is not known whether such transfusions have decreased in surgical patients. Approximately 11 million RBC transfusions are performed annually, and two-thirds of those are for patients in the perioperative period.

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Clinical Pathology Abstracts, 5/18

May 2018—Use of a smartphone app to assess neonatal jaundice: Neonates are screened for hyperbilirubinemia before hospital discharge using a transcutaneous or total serum bilirubin measurement. However, levels peak at approximately 96 hours of life, which is after most healthy infants have left the hospital. Outpatient follow-up is often performed by visual inspection, but this can be highly variable and have poor interobserver agreement.

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Clinical Pathology Abstracts, 3/18

March 2018—Web platform vs. genetic counselor for releasing carrier results from exome sequencing: Genomics can be used to generate a large amount of data that may have important implications for clinical care and selection of therapeutics. However, a bottleneck exists in clinical genomics due to the large volume of results and the lack of availability of knowledgeable professionals to return them to patients in person.

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Clinical Pathology Abstracts, 2/18

February 2018—Restrictive or liberal approach to red blood cell transfusion for cardiac surgery: Among the largest group of recipients of red blood cell transfusions are patients undergoing cardiac surgery. Whether a restrictive approach to intraoperative and postoperative transfusion in cardiac surgery is superior to a more liberal approach with regard to patient outcomes is unclear.

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Clinical Pathology Abstracts, 1/18

January 2018—Drone transport of chemistry and hematology samples over long distances: Interest in using unmanned aerial vehicles, or drones, to transport laboratory specimens is based on the need to move specimens from satellite facilities to a central hub for testing. Earlier studies of biological specimens transported by drones were performed in ambient or cold temperatures for a maximum flight length of 40 minutes.

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Clinical Pathology Abstracts, 12/17

December 2017—Chimeric antigen receptor T-cell therapy assessment and management of toxicities: In August, the FDA approved the gene therapy Kymriah (tisagenlecleucel) for pediatric and young adult patients with a form of acute lymphoblastic leukemia. Chimeric antigen receptor (CAR) T-cell therapy is a breakthrough in the treatment of leukemia and lymphoma, but it is associated with unique acute toxicities, such as cytokine-release syndrome and CAR-T-cell-related encephalopathy syndrome.

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Clinical Pathology Abstracts, 11/17

November 2017—Performance of virological testing for early infant diagnosis: a systematic review: The World Health Organization recommends that HIV-exposed infants receive virological testing for HIV infection between four and six weeks of age and treatment with antiretroviral (ARV) therapy as soon as the diagnosis is made. Despite efforts to expand mother-to-child transmission prevention programs, only an estimated 50 percent of HIV-exposed infants are tested within the first two months of life.

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Clinical Pathology Abstracts, 10/17

October 2017—Association between age at natural menopause and risk of type 2 diabetes: Menopause in women marks the loss of ovarian follicle development and the timing of the final menstrual period. The timing of menopause differs significantly among women and is seen as a marker of aging and cardiovascular health. Studies have shown a link between early onset of menopause and an increased risk of cardiovascular disease (CVD) and overall mortality, whereas menopause at age 50 to 54 years is linked to a decrease in CVD risk and mortality.

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Clinical Pathology Abstracts, 9/17

September 2017—Hemoccult testing before therapeutic anticoagulation in venous thromboembolism: Gastrointestinal bleeding is a major adverse event associated with therapeutic anticoagulation. Surveys of physicians have shown that concern for this event is one of the most common reasons to withhold anticoagulation in patients who have atrial fibrillation, acute coronary syndromes, or venous thromboembolism (VTE).

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Clinical Pathology Abstracts, 8/17

August 2017—Etiology and clinical presentation of birth defects: a population-based study: Birth defects are inborn errors of development and include any structural or functional anomaly that impacts physical, intellectual, or social well-being. They are a considerable and growing clinical and public health challenge. Major birth defects are common and costly. Collectively, they are estimated to occur in one in 33 births, which translates into approximately 7.9 million babies affected worldwide. In the United States alone, the cost of care during a single year (2004) was estimated to be $2.6 billion.

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Clinical Pathology Abstracts, 7/17

July 2017—Effects of early tranexamic acid administration on women with postpartum hemorrhage: The leading cause of maternal death is postpartum hemorrhage, which is defined as blood loss of more than 500 mL within 24 hours of giving birth. The majority of such deaths occur in low-income and middle-income countries.

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Clinical Pathology Abstracts, 6/17

June 2017—Stem cell divisions, somatic mutations, cancer etiology, and cancer prevention: Cancers are caused by mutations that may be inherited or induced by environmental factors or that may result from DNA replication errors. The mutations due to random mistakes made during normal DNA replication may explain why cancers occur much more commonly in some tissues than others. Approximately three mutations occur every time a normal human stem cell divides.

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Clinical Pathology Abstracts, 4/17

April 2017—Cost-benefit analysis of Chlamydia trachomatis screening in pregnant women: Chlamydia trachomatis is the most common bacterial sexually transmitted infection in the United States. In 2010, more than 1.3 million such infections in the United States were reported to the Centers for Disease Control and Prevention. In 2013, the estimated direct lifetime cost of treatment for chlamydia and its complications was more than $500 million.

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Clinical Pathology Abstracts, 3/17

February 2017—Preventing genetic testing order errors via a lab utilization management program: Diagnostic errors, or failure to provide an accurate and timely diagnosis, impact an estimated 12 million outpatient care visits annually in the United States. These errors can often be attributed to the testing process, including test selection, ordering, retrieval, and interpretation. Literature about diagnostic errors has primarily focused on the outpatient setting; study of diagnostic error in the inpatient setting has been limited.

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Clinical Pathology Abstracts, 1/17

January 2017—Impact of laboratory cost display on resident attitudes and knowledge of costs: The Institute of Medicine report on health care quality recommends providing better care at lower costs. However, the United States has consistently seen rising health care costs instead of cost reductions. An approach to reducing unnecessary health care spending is to make physicians more aware of the cost of diagnostic tests.

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Clinical Pathology Abstracts, 12/16

December 2016—Process optimization to improve immunosuppressant drug testing turnaround time: The routine use of immunosuppressant medications is critical for patients receiving solid organ transplants. Monitoring immunosuppressant (ISP) drug concentrations helps guide safe and effective dosing. ISP drug monitoring is performed using mass spectrometry or immunoassay methods.

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Clinical Pathology Abstracts, 11/16

November 2016—Neonatal ICU quality initiative: identifying preanalytical variables that contribute to specimen hemolysis: Hemolysis is a major cause of sample rejection and the need to recollect a specimen from a patient. In the neonatal intensive care unit, this may be of particular concern because of limited venous access and the risk of causing iatrogenic anemia.

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Clinical Pathology Abstracts, 10/16

October 2016—Risk factors for transfusion in cesarean section deliveries at a tertiary hospital: Obstetrical hemorrhage is a major cause of morbidity and mortality in young women and may be difficult to predict. In some regions of the world, postpartum hemorrhage (PPH) may account for up to 25 percent of maternal deaths. Many studies have focused on the predictors of PPH before delivery.

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Clinical Pathology Abstracts, 8/16

August 2016—Cold antibodies may be detected with routine pretransfusion testing and may obscure the identification of clinically significant red blood cell antibodies. They may be detected in healthy people or may be transient in appearance after a mycoplasma or mononucleosis infection. In most cases, cold antibodies are benign, and pretransfusion laboratory testing is designed to avoid detecting these antibodies by eliminating testing at room temperature.

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Clinical Pathology Abstracts, 7/16

July 2016—Utilization management to reduce unnecessary lab testing at a VA hospital: It is estimated that laboratory and pathology testing account for four percent of annual health care costs. A laboratory utilization management system, or laboratory expert system (LES), can be employed to reduce such costs. A variety of functionality, including passive and active alerts, in the computerized physician order entry (CPOE) system provide decision-making support for physicians ordering tests.

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Clinical Pathology Abstracts, 6/16

June 2016—Fasting or nonfasting lipid measurements: The joint American College of Cardiology and American Heart Association “2013 ACC/AHA Guideline on the Treatment of Blood Cholesterol to Reduce Atherosclerotic Cardiovascular Risk in Adults” replaces low-density lipoprotein cholesterol treatment thresholds with a more global measurement of risk.

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Clinical Pathology Abstracts, 5/16

May 2016—Platelet transfusion: a clinical practice guideline from the AABB: The AABB recently developed guidelines on the appropriate use of platelet transfusions in adults. The guidelines are based on a systematic review of randomized clinical trials and observational studies from 1900 to September 2014 that reported clinical outcomes on patients who received either prophylactic or therapeutic platelet transfusions.

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Clinical Pathology Abstracts, 3/16

March 2016—Impact of add-on laboratory testing at an academic medical center: Clinical laboratories are often asked to perform additional laboratory tests after the original sample is received and testing per the original order is complete. It is well known that this significantly increases laboratory workload and impacts turnaround time.

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Clinical Pathology Abstracts, 2/16

February 2016—Link between a liberal transfusion strategy and patient survival: Guidelines support using a restrictive strategy for blood transfusion management in various clinical settings. However, randomized controlled trials in cardiac surgery, oncology, and hip fracture surgery suggest that a more liberal transfusion strategy may benefit survival.

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Clinical Pathology Abstracts, 1/16

January 2016—A logical delta check for identifying erroneous blood cell count results: Regulations require that hospitals have a quality management plan that benchmarks key indicators of quality performance. One such indicator is a delta check, which is a broad quality control for preanalytic and analytic errors that identifies significant variation in a patient’s present lab result when compared with the patient’s previous result for the same test.

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Clinical Pathology Abstracts, 12/15

December 2015—Optimizing transfusion ratios in massive transfusion protocols: The 1:1:1 ratio of packed red blood cells to plasma to platelet use for massive transfusion emerged out of data on mortality in military personnel wounded in combat. Many studies have investigated the optimal ratio for use in massive transfusion. The literature is controversial, and studies continue to support and refute the 1:1:1 ratio.

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Clinical Pathology Abstracts, 11/15

Editor: Deborah Sesok-Pizzini, MD, MBA, professor, Department of Clinical Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, and chief, Division of Transfusion Medicine, Children’s Hospital of Philadelphia. Altered lysosomal proteins in neural-derived plasma exosomes in preclinical Alzheimer disease It is necessary to identify biomarkers to detect patients at risk for Alzheimer disease well before neurological signs ...

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Clinical Pathology Abstracts, 10/15

October 2015—Impact of a rapid respiratory panel test on patient outcomes: Studies have examined the impact of polymerase chain reaction tests on patient outcomes. Rapid detection in microbiology and virology allows more appropriate treatment sooner. This, in turn, can reduce hospital length of stay for patients with respiratory pathogens and may generate hospital savings.

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Clinical Pathology Abstracts, 9/15

September 2015—Costs and outcomes after cardiac surgery in patients refusing transfusion: Numerous randomized, controlled trials have shown no benefit of a liberal blood transfusion strategy compared with a more restrictive strategy in surgical patients. Furthermore, concerns exist regarding the association of transfusion with postoperative morbidity and mortality.

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Clinical Pathology Selected Abstracts, 6/15

June 2015—Effects of red cell storage duration on patients undergoing cardiac surgery: Patients who undergo cardiac surgery often receive multiple units of red blood cells and may be at risk for end-organ injury because of compromised cardiac output or a proinflammatory state that follows cardiopulmonary bypass. At least one large study has shown an increase in adverse outcomes in patients receiving RBCs stored longer than 14 days compared with those receiving RBCs stored less than 14 days.

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Clinical Pathology Selected Abstracts, 5/15

May 2015—Use of hemoglobin content of reticulocytes to evaluate anemia in cancer patients: Evaluating iron-deficiency anemia in patients with cancer is difficult. Malignancy is frequently associated with anemia of chronic disease. However, it is important to distinguish iron-deficiency anemia due to inadequate iron stores from anemia of chronic disease due to decreased iron availability with abundant stores. Advanced reticulocyte indices, such as the cellular hemoglobin content of reticulocytes, named CHr and RET-He, are reportable parameters on newer automated hematology analyzers.

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Anatomic Pathology Selected Abstracts, 3/15

March 2015—Histopathologic spectrum of thecoma of the ovary: a report of 70 cases: The authors evaluated 70 cases of thecoma of the ovary to ascertain their histopathologic spectrum. The tumors occurred over a wide age range (average, 49.6 years). Presentation in the form of pelvic or abdominal pain was uncommon, but postmenopausal bleeding was relatively frequent.

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Clinical Pathology Selected Abstracts, 3/15

March 2015—Chimeric antigen receptor T cells for sustained remissions in leukemia: Relapsed and refractory acute lymphoblastic leukemia is associated with a poor prognosis. T cells genetically modified to express chimeric antigen receptors targeted to cells expressing CD19 (CTL019) are a promising treatment strategy, with complete responses previously reported in two patients who had relapsed and refractory acute lymphoblastic leukemia (ALL).

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Clinical Pathology Selected Abstracts, 2/15

February 2015—Alcohol consumption relative to type of breast cancer risk in postmenopausal women: Alcohol consumption is a known risk factor for breast cancer, but it is not known which subtypes of breast cancer, if any, are more likely associated with alcohol consumption. The authors conducted a large study using the Prostate, Lung, Colorectal and Ovarian Cancer Screening Trial cohort to test for heterogeneity in alcohol-related risk by breast cancer subtypes defined by estrogen receptor (ER) and progesterone receptor (PR) status and histological type.

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Clinical Pathology Selected Abstracts, 12/14

December 2014—Prevalence of antimicrobial use in U.S. acute care hospitals: Inappropriate antimicrobial drug use is associated with adverse events in hospitalized patients as well as the emergence of resistant pathogens. Targeting effective interventions to improve antimicrobial use in the acute care setting may help guide safe and effective therapy while reducing the risks and complications of resistant and difficult-to-treat pathogens.

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Clinical Pathology Selected Abstracts, 1/13

January 2013—Chocolate consumption, cognitive function, and Nobel laureates: Dietary flavonoids are associated with health benefits, including improved cognitive function and reduced risks associated with aging, such as the risk of dementia. Flavonoids, or the subclass flavanols, are present in green tea, red wine, cocoa, and some fruits. Evidence has also shown that flavanols are linked to lower blood pressure due to vasodilation in the peripheral vasculature and brain.

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Clinical Pathology Selected Abstracts, 10/14

October 2014—Benefits of green tea extract to brain connectivity during working memory processing: Green tea extract or its main ingredient has been shown to have a beneficial impact on cognitive functioning and prevention of cognitive decline. The benefit to cognition could be related to altered brain activity in regions engaged during higher order cognitive functioning. Some recent studies demonstrated increased brain activation in the fronto-parietal regions during working memory processing.

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Clinical Pathology Selected Abstracts, 9/14

September 2014—Potential link between vitamin D and subclinical cerebrovascular disease: Vitamin D deficiency has been associated with several diseases, including hypertension, diabetes mellitus, and stroke. A recent prospective population-based study of cardiovascular disease showed that subclinical infarcts and white matter hyperintensities (WMHs) are commonly seen on brain magnetic resonance image scans of older adults and are associated with cardiovascular disease risk factors and prior stroke. The lesions are also associated with reduced functioning on cognitive tests.

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Clinical Pathology Selected Abstracts, 8/14

August 2014—Anti-D alloimmunization after D-incompatible platelet transfusions: Because a small but immunogenic dose of red blood cells may be contained in apheresis platelets, transfusion services establish protocols to provide D– recipients with D– platelets to prevent anti-D alloimmunization. This is of particular concern for young females as there is potential for hemolytic disease of the newborn. In cases where D+ platelets are given to D– recipients, Rh immune globulin (RhIG) may be used to help prevent sensitization. The authors retrospectively analyzed during a 14-year period the anti-D formation in D– recipients who received D+ platelets without the use of RhIG.

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Clinical Pathology Selected Abstracts, 7/14

July 2014—Effects of fish oil in recent-onset rheumatoid arthritis: a patient study: The omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaneonic acid (DHA), which are found in fish oil, can suppress synthesis of the omega-6 proinflammatory eicosanoids prostaglandin E2 and leukotriene B4. The effects of fish oil as a dietary supplement in rheumatoid arthritis have been studied in randomized, controlled trials for patient-assessed pain, morning stiffness, number of painful or tender joints, and non-steroidal anti-inflammatory drug consumption.

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Clinical Pathology Selected Abstracts, 6/14

June 2014—How a single patient influenced HIV research: 15-year followup: The hope of a cure for human immunodeficiency virus infection is raised by recent reports of people in whom viral replication spontaneously reduced despite the absence of antiretroviral treatment (ART). A “Berlin patient” described in 1999 was immediately treated with ART and hydroxyurea after an acute HIV infection but chose to discontinue treatment.

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Clinical Pathology Selected Abstracts, 5/14

May 2014—Real-time clinical decision support systems for platelet and cryoprecipitate orders: Platelet and cryoprecipitate transfusions are often used to treat patients who are bleeding. However, many clinicians use non-evidence–based approaches to ordering and transfusing these products. Cost and such adverse effects as transfusion-transmitted diseases and transfusion reactions make it desirable to reduce the unnecessary transfusion of these products.

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Clinical Pathology Selected Abstracts, 4/14

April 2014—Intervention to improve timing of vancomycin levels: Samples drawn for therapeutic drug monitoring are sometimes drawn too early, which can cause inaccurate results that lead to a potential dosing error. One approach to reducing such errors is to create an information technology tool to assist clinicians in determining the best timing for a sample draw. The authors conducted a study at Brigham and Women’s Hospital, Boston, in which the investigators used both an educational and electronic intervention to reduce the number of vancomycin collection timing errors. The information technology-based intervention provided educational instructions to nurses.

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Clinical Pathology Selected Abstracts, 3/14

March 2014—Transfusion-associated hyperkalemic cardiac arrest in pediatric patients: Hyperkalemic cardiac arrest is a potential complication in pediatric patients undergoing rapid massive transfusion. Identifying patients at particular risk for this reaction is critical for determining the best strategies to prevent transfusion-associated hyperkalemic cardiac arrest (TAHCA). Concerns arise over the use of older blood in at-risk pediatric patients. The authors examined the case reports and studies related to transfusion-associated cardiac arrest in a pediatric population.

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Clinical Pathology Selected Abstracts, 2/14

February 2014—Comorbidity-adjusted life expectancy: a new tool to aid cancer screening strategies: Controversy surrounds how best to use cancer screening tests in the elderly and at what age to stop screening. The benefits of early cancer diagnosis and treatment decline with age because many elderly people are more likely to die of a comorbid condition or other cause than of cancer. This impacts the survival benefits of early cancer detection. One must also consider the harms of screening, including complications of further testing and treatment for a disease that may not be symptomatic in a patient’s lifetime.

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Clinical Pathology Selected Abstracts, 1/14

January 2014—Predictive factors for blood transfusion in living donor pediatric liver transplantation: Patients undergoing liver transplantation, in particular pediatric liver transplantation, may receive massive transfusion. However, technical surgical improvements over the years have made it possible for many patients undergoing pediatric living donor liver transplantation (LDLT) to avoid transfusion.

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Clinical Pathology Selected Abstracts, 12/13

December 2013—Impact of blood product ratios in massively transfused pediatric trauma patients

Few studies have included pediatric patients when analyzing the impact of plasma/packed red blood cell (PRBC) ratios during massive transfusions. The implications of changing to a 1:1 plasma/PRBC ratio are significant and relate to additional product exposure, transfusion reaction-related risk, and product wastage.

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Clinical Pathology Selected Abstracts, 10/13

October 2013—Performance of assays used in the U.S. to diagnose Lyme borreliosis acquired in Europe: The most common tick-borne infection reported in the United States is Lyme disease, which can be acquired in the United States or while traveling in Europe. Evaluation of Lyme disease acquired in Europe, by doctors in the United States, is challenging because assays used in the United States use lysates of the original Borrelia burgdorferi sensu stricto isolate (B31 strain).

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Clinical Pathology Selected Abstracts, 7/13

July 2013—Risk factors for first venous thromboembolism around pregnancy: Venous thromboembolism is a serious maternal complication occurring at a rate of one to two per 1,000 maternities during pregnancy and the puerperium. Venous thromboembolism (VTE) is a leading cause of maternal mortality in developed countries and an important source of morbidity in the form of post-thrombotic syndrome.

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Clinical Pathology Selected Abstracts, 6/13

June 2013—Ehrlichiosis is a tick-borne disease that may be asymptomatic or result in fatal sepsis. Ehrlichiosis transmitted from transfusion of blood products has not been documented. A case report of a 9-year-old Georgia boy with a history of acute lymphoblastic leukemia is the first report of Ehrlichia ewingii infection transmitted by a platelet transfusion. The authors first describe the patient as presenting to the hospital with complaints of fever, fatigue, malaise, vomiting, diarrhea, and petechial rash.

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Clinical Pathology Selected Abstracts, 5/13

May 2013—Although allogeneic bone marrow transplantation can cure sickle cell disease, human leukocyte antigen-matched donors are difficult to find, and the toxicities of myeloablative conditioning prior to transplants are a major risk factor for morbidity and mortality in most adults. The authors developed for patients with sickle cell disease newer bone marrow transplant regimens using nonmyeloablative conditioning regimens and human leukocyte antigen (HLA)-haploidentical donors.

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Clinical Pathology Selected Abstracts, 4/13

April 2013—Variant of TREM2 associated with risk of Alzheimer’s disease: Alzheimer’s disease is the most common form of dementia in the elderly. The disease is characterized by the formation of extracellular amyloid plaques, intracellular neurofibrillary tangles, and loss of neurons, which results in brain atrophy and progressive loss of cognitive function.

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Clinical Pathology Selected Abstracts, 2/13

February 2013—Outcome of patients who refuse transfusion after cardiac surgery: Jehovah’s Witness patients may refuse blood transfusion, due to religious beliefs, following cardiac surgery. Strategies to conserve blood for such patients may include the preoperative use of erythropoietin, iron, and B-complex vitamins, as well as hemoconcentration; intraoperative use of antifibrinolytics and cell-saver and smaller cardiopulmonary bypass circuits; and tolerance of low hematocrit levels postoperatively.

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