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Context.--In 2018 the College of American Pathologists Diagnostic Immunology and Flow Cytometry Committee designed and implemented a new plasma cell neoplasia flow cytometry proficiency testing program--PCNEO--to allow clinical flow cytometry laboratories to monitor and assess their performance compared with a peer group. Objective.--To report the results from the first 4 years of the PCNEO program. Design.--Program participants were sent 2 sets of challenges per year, each including 1 wet challenge and 2 dry challenges, with associated clinical and laboratory findings. The wet challenges were composed of myeloma cell line specimens (with or without dilution in preserved whole blood) for flow cytometric analysis. The dry (paper) challenges were composed of clinical case summaries and images of flow cytometric test results from various flow cytometry laboratories of committee members. Results.--A total of 116 to 145 laboratories from 17 countries enrolled in the proficiency testing program. For the wet challenges, almost all participants (97%--100%; cumulative, 98.2%) correctly identified the presence of neoplastic plasma cell populations based on flow cytometric analysis of undiluted myeloma cell lines. Slightly fewer participants (89.0%--97.4%; cumulative, 95.2%) correctly identified the presence of neoplastic plasma cell populations based on flow cytometric analysis of diluted myeloma cell lines (10% or 50% dilutions into peripheral blood) intended to better represent a typical clinical sample. There was generally agreement among 80% or more of participants for positive or negative staining for CD38, CD138, CD19, CD20, and surface and cytoplasmic K and λ light chains. Similarly, 84% to 100% of participants were able to correctly identify the presence of neoplastic plasma cell populations in paper challenges, including the presence of small, neoplastic plasma cell populations (0.01%--5.0% clonal plasma cells) and the presence of nonneoplastic plasma cell populations (correctly identified by 91%--96% of participants). Conclusions.--Participant performance in the new proficiency testing program was excellent overall, with the vast majority of participants able to perform flow cytometric analysis and identify neoplastic plasma cell populations and to identify small plasma cell clones or expanded populations of reactive plasma cells in dry challenge flow cytometry results. This program will allow laboratories to verify the accuracy of their testing program and test interpretations for the assessment of patients suspected of having a plasma cell neoplasm. [ABSTRACT FROM AUTHOR]

Introduction: Healthcare contributes 10% of greenhouse gases in the United States and generates two milion tons of waste each year. Reducing healthcare waste can reduce the environmental impact of healthcare and lower hospitals’ waste disposal costs. However, no literature to date has examined US emergency department (ED) waste management. The purpose of this study was to quantify and describe the amount of waste generated by an ED, identify deviations from waste policy, and explore areas for waste reduction. Methods: We conducted a 24-hour (weekday) ED waste audit in an urban, tertiary-care academic medical center. All waste generated in the ED during the study period was collected, manually sorted into separate categories based on its predominant material, and weighed. We tracked deviations from hospital waste policy using the hospital’s Infection Control Manual, state regulations, and Health Insurance Portability and Accountability Act standards. Lastly, we calculated direct pollutant emissions from ED waste disposal activities using the M+Waste Care Calculator. Results: The ED generated 671.8 kilograms (kg) total waste during a 24-hour collection period. On a per-patient basis, the ED generated 1.99 kg of total waste per encounter. The majority was plastic (64.6%), with paper-derived products (18.4%) the next largest category. Only 14.9% of waste disposed of in red bags met the criteria for regulated medical waste. We identified several deviations from waste policy, including loose sharps not placed in sharps containers, as well as re-processable items and protected health information thrown in medical and solid waste. We also identified over 200 unused items. Pollutant emissions resulting per day from ED waste disposal include 3110 kg carbon dioxide equivalent and 576 grams of other criteria pollutants, heavy metals, and toxins. Conclusion: The ED generates significant amounts of waste. Current ED waste disposal practices reveal several opportunities to reduce total waste generated, increase adherence to waste policy, and reduce environmental impact. While our results will likely be similar to other urban tertiary EDs that serve as Level I trauma centers, future studies are needed to compare results across EDs with different patient volumes or waste generation rates. [ABSTRACT FROM AUTHOR]

The low cost, simple, noninvasive, and continuous measurement of cerebral blood flow velocity (CBFV) by transcranial Doppler is becoming a common clinical tool for the assessment of cerebral hemodynamics. CBFV monitoring can also help with noninvasive estimation of intracranial pressure and evaluation of mild traumatic brain injury. Reliable CBFV waveform analysis depends heavily on its accurate beat-to-beat delineation. However, CBFV is inherently contaminated with various types of noise/artifacts and has a wide range of possible pathological waveform morphologies. Thus, pulse onset detection is in general a challenging task for CBFV signal. In this paper, we conducted a comprehensive comparative analysis of three popular pulse onset detection methods using a large annotated dataset of 92,794 CBFV pulses—collected from 108 subarachnoid hemorrhage patients admitted to UCLA Medical Center. We compared these methods not only in terms of their accuracy and computational complexity, but also for their sensitivity to the selection of their parameters' values. The results of this comprehensive study revealed that using optimal values of the parameters obtained from sensitivity analysis, one method can achieve the highest accuracy for CBFV pulse onset detection with true positive rate (TPR) of 97.06% and positive predictivity value (PPV) of 96.48%, when error threshold is set to just less than 10 ms. We conclude that the high accuracy and low computational complexity of this method (average running time of 4ms/pulse) makes it a reliable algorithm for CBFV pulse onset detection. [ABSTRACT FROM AUTHOR]

Objectives. The purpose of this survey was to evaluate attitudes toward acupuncture among pain medicine fellowship directors. Additional goals were to assess the availability of acupuncture at academic medical centers and ascertain the inclusion of this modality in fellowship curricula. Methods. Electronic and paper surveys were distributed to the 97 American College of Graduate Medical Education pain medicine fellowship directors during January and February, 2014. Directors were queried about their referral patterns to acupuncture, as well as their perceptions of the utility of acupuncture for common pain conditions. They were asked about the availability of acupuncture at their institution, and whether acupuncture was included in the fellowship curriculum. Results. Sixty-seven percent of fellowship directors (65/97) completed the questionnaire. A majority of directors (83%) reported acupuncture is available to patients at their institution, and reported that acupuncture is a modality that they discuss with patients when creating a treatment plan for chronic pain (72%). The majority of programs include acupuncture as part of didactic (63%) and clinical (52%) education. Time constraints, lack of qualified teaching personnel, and cost to patients were cited as barriers to inclusion. The majority of fellowship directors considered acupuncture a safe and worthwhile option for common pain conditions. Conclusion. Results from this survey indicate that acupuncture is widely available to patients at academic medical centers, integrated into many pain fellowship curricula, and considered a useful modality by physician leaders in the field of pain medicine. This sentiment, paired with the flexibility of national guidelines for pain fellowship curricula, suggests a trend toward greater inclusion of this modality in academic medicine. [ABSTRACT FROM AUTHOR]

A wide range of studies show the capacity of multivariate statistical methods for fMRI to improve mapping of brain activations in a noisy environment. An advanced method uses local canonical correlation analysis (CCA) to encompass a group of neighboring voxels instead of looking at the single voxel time course. The value of a suitable test statistic is used as a measure of activation. It is customary to assign the value to the center voxel; however, this is a choice of convenience and without constraints introduces artifacts, especially in regions of strong localized activation. To compensate for these deficiencies, different spatial constraints in CCA have been introduced to enforce dominance of the center voxel. However, even if the dominance condition for the center voxel is satisfied, constrained CCA can still lead to a smoothing artifact, often called the "bleeding artifact of CCA", in fMRI activation patterns. In this paper a new method is introduced to measure and correct for the smoothing artifact for constrained CCA methods. It is shown that constrained CCA methods corrected for the smoothing artifact lead to more plausible activation patterns in fMRI as shown using data from a motor task and a memory task. [ABSTRACT FROM AUTHOR]

The article presents the authors' reply to a letter from D. Meyre regarding their systematic review and meta-analysis on the associations of variants of proprotein convertase subtilisine/kexin type I gene (PCSKI) with obesity. The reply addresses Meyre's criticisms of what he perceives as errors in the paper including an assertion that meta-analysis included 2 overlapping cohorts and suggestion that the analysis was underpowered to find significant association of rs632 with body mass index.

This article focuses on a study related to epidemiology. Mankind may be worried about a worldwide outbreak of influenza, but man's best friend is already in the midst of one. A dangerous flu virus originating in horses is spreading fast among U.S. dogs and may circle the globe, researchers say. With very few exceptions, dogs seemed resistant to influenza, says Edward Kilbourne, a retired flu researcher at New York Medical College in New York City, who published rare evidence of a human flu strain infecting six dogs in New York in 1975. The current outbreak, described in a paper published online by Science this week, came to light after 22 greyhounds developed a respiratory disease, and eight died, at a Florida racetrack in January 2004. The researchers found that it belongs to the H3N8 strain, which causes influenza in horses worldwide. Its sequence is 96% identical to that of other circulating H3N8 strains, suggesting that the entire virus jumped the species barrier, without reassorting with another strain first.