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  • 1
    In: Transfusion, Wiley, Vol. 61, No. 6 ( 2021-06), p. 1678-1679
    Type of Medium: Online Resource
    ISSN: 0041-1132 , 1537-2995
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2018415-3
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  • 2
    In: Thrombosis and Haemostasis, Georg Thieme Verlag KG, Vol. 120, No. 12 ( 2020-12), p. 1691-1699
    Abstract: Background Mortality in coronavirus disease of 2019 (COVID-19) is associated with increases in prothrombotic parameters, particularly D-dimer levels. Anticoagulation has been proposed as therapy to decrease mortality, often adjusted for illness severity. Objective We wanted to investigate whether anticoagulation improves survival in COVID-19 and if this improvement in survival is associated with disease severity. Methods This is a cohort study simulating an intention-to-treat clinical trial, by analyzing the effect on mortality of anticoagulation therapy chosen in the first 48 hours of hospitalization. We analyzed 3,625 COVID-19+ inpatients, controlling for age, gender, glomerular filtration rate, oxygen saturation, ventilation requirement, intensive care unit admission, and time period, all determined during the first 48 hours. Results Adjusted logistic regression analyses demonstrated a significant decrease in mortality with prophylactic use of apixaban (odds ratio [OR] 0.46, p = 0.001) and enoxaparin (OR = 0.49, p = 0.001). Therapeutic apixaban was also associated with decreased mortality (OR 0.57, p = 0.006) but was not more beneficial than prophylactic use when analyzed over the entire cohort or within D-dimer stratified categories. Higher D-dimer levels were associated with increased mortality (p  〈  0.0001). When adjusted for these same comorbidities within D-dimer strata, patients with D-dimer levels  〈  1 µg/mL did not appear to benefit from anticoagulation while patients with D-dimer levels  〉  10 µg/mL derived the most benefit. There was no increase in transfusion requirement with any of the anticoagulants used. Conclusion We conclude that COVID-19+ patients with moderate or severe illness benefit from anticoagulation and that apixaban has similar efficacy to enoxaparin in decreasing mortality in this disease.
    Type of Medium: Online Resource
    ISSN: 0340-6245 , 2567-689X
    Language: English
    Publisher: Georg Thieme Verlag KG
    Publication Date: 2020
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  • 3
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2019
    In:  American Journal of Clinical Pathology Vol. 152, No. Supplement_1 ( 2019-09-11), p. S16-S16
    In: American Journal of Clinical Pathology, Oxford University Press (OUP), Vol. 152, No. Supplement_1 ( 2019-09-11), p. S16-S16
    Abstract: In order to avoid additional blood draws for their patients, clinicians frequently order add-on tests on existing specimens in the laboratory. Manually processing these add-ons is problematic, utilizes tremendous resources, and raises concerns regarding specimen integrity. The objective of this study was to analyze add-on ordering patterns and assess the time and resources required to complete these orders. In this retrospective study conducted at a large, multisite, academic medical center, a report was generated from the laboratory information system (LIS) to identify all the add-on orders that were placed with details about the type of add-on test, which specimen it was added to, and location from where an add-on order was placed for a 2-month period (August 5 to October 4, 2018). The workflow was observed and financial cost was calculated. The laboratory received 5,658 add-on orders during the study period. By laboratory protocol, 859 tests were cancelled, leaving 4,799 tests to be processed. Add-on orders were most common for liver tests (7.48%), creatine kinase (6.35%), troponin (6.31%), vancomycin level (5.93%), thyroid-stimulating hormone (4.91%), magnesium (4.81%), and vitamin B12 (4.33%). The add-on orders were mainly generated for inpatient (74.07%) followed by emergency (17.79%) and outpatient departments (8.12%). The add-on request is placed by the clinical provider in the hospital information system (HIS) as a generic “Add-on Order” test, with free text to specify the test and specimen. A clerk in the laboratory uses the LIS-generated work list to electronically order the requested tests to the original specimen. Subsequently, a clerk must manually locate the original specimen and deliver it to the performing lab to run the add-on test. The median turnaround time from the provider placing the generic add-on order in the HIS to the lab placing the add-on in the LIS is 119 minutes. The median time for the provider to place an add-on after the initial order is 462 minutes. The average time needed to monitor the add-on work list, electronically place the add-on to the original order, and retrieve the sample for one test for a skilled senior statistical clerk is 7 minutes. The average number of add-on requests received daily is 71. Therefore, the daily time to process add-ons is 497 minutes (8.2 hours). Based on the hourly cost and fringe in the laboratory ($28.92/hour), these add-on tests cost $237/day in labor ($86,000/year). Our study demonstrates the significant cost and labor burden of add-on tests in a laboratory with manual processing. The laboratory is considering transitioning to direct provider ordering of add-ons to existing specimens using laboratory-defined rules in the HIS and moving to total laboratory automation with robotic specimen archival and retrieval to reduce the manual efforts, which would streamline the add-on workflow.
    Type of Medium: Online Resource
    ISSN: 0002-9173 , 1943-7722
    RVK:
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2039921-2
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  • 4
    Online Resource
    Online Resource
    Jordanian American Physician Academy ; 2023
    In:  JAP Academy Journal Vol. 1, No. 2 ( 2023-06-04)
    In: JAP Academy Journal, Jordanian American Physician Academy, Vol. 1, No. 2 ( 2023-06-04)
    Type of Medium: Online Resource
    ISSN: 2836-3620
    URL: Issue
    Language: Unknown
    Publisher: Jordanian American Physician Academy
    Publication Date: 2023
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  • 5
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2019
    In:  American Journal of Clinical Pathology Vol. 152, No. Supplement_1 ( 2019-09-11), p. S15-S16
    In: American Journal of Clinical Pathology, Oxford University Press (OUP), Vol. 152, No. Supplement_1 ( 2019-09-11), p. S15-S16
    Abstract: Sickle cell disease (SCD) is the most common inherited blood disorder in the United States. It is a hemoglobinopathy that leads to red blood cell (RBC) sickling and a broad range of disease complications including vaso-occlusive crisis, acute chest syndrome, and retinopathy. Hydroxyurea, a drug used to treat SCD, is known to increase expression of hemoglobin F (HbF), a type of hemoglobin normally expressed in infancy; HbF levels between 10% and 20% are associated with decreased vaso-occlusive episodes and improved survival. Hereditary persistent hemoglobin F (HPHF), a typically asymptomatic hemoglobinopathy associated with sustained hemoglobin F (HbF) expression into adulthood (HbF 〉 10%), in combination with SCD is associated with decreased complications. Laboratories typically determine the HbF level via high-performance liquid chromatography (HPLC). HbF levels approaching 30% on HPLC are thought to be protective against SCD complications. However, HbF may be found within a majority or minority of RBCs, pancellular (deletional HPHF) or heterocellular distribution (nondeletional HPHF), respectively. Additionally, the quantity of HbF within cells can range from low ( 〈 10 picograms/cell) to high ( 〉 35 picograms). We sought to determine the quantity and distribution of HbF required to protect against sickle cell disease symptoms both via traditional HPLC as well as flow cytometry. This retrospective study was conducted at a large academic medical center over a period of 2 months (January-February 2019). We collected blood from sickle cell patients that had a detectable HbF level on hemoglobin electrophoresis. We then stained RBCs from 16 of the patients for HbF and performed flow cytometry to examine the HbF distribution. We calculated the cellular concentration of HbF within each HbF+ cell using the formula (MHC × %HbF)/%F-cells. We performed a chart review to determine the native hemoglobin type, exposure to hydroxyurea, and clinical symptoms of sickle cell disease. We identified four patients over the age of 20 with HbS/HPHP and no exposure to hydroxyurea. Two of these patients experienced no sickle cell disease complications; the protected patients had heterocellular distribution of HbF, but had a high concentration of HbF per HbF+ cell ( 〉 35 picograms/cell). Notably, these asymptomatic patients both had HbF level by HPLC less than 30. One of the symptomatic HbS/HPHF patients had heterocellular expression of HbF with low cellular concentration (28 picograms/cell) while the other patient had pancellular HbF expression with very low cellular concentration (6.4 picograms/cell). Our study demonstrates that HPHF alone does not prevent sickle cell disease complications. Our study highlights the importance of quantifying the cellular concentration of HbF, which can provide useful information beyond that of HPLC. In addition, our study raises the potential of the clinical use of hydroxyurea in patients with sickle cell disease even in the presence of HPHF.
    Type of Medium: Online Resource
    ISSN: 0002-9173 , 1943-7722
    RVK:
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2039921-2
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  • 6
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2019
    In:  American Journal of Clinical Pathology Vol. 152, No. Supplement_1 ( 2019-09-11), p. S16-S17
    In: American Journal of Clinical Pathology, Oxford University Press (OUP), Vol. 152, No. Supplement_1 ( 2019-09-11), p. S16-S17
    Abstract: von Willebrand disease (VWD) is a common coagulation disorder with a prevalence of 0.1% to 1.0% manifesting as a wide spectrum of bleeding symptoms. Type 1 is diagnosed by confirming a quantitative decrease in VWF level, while type 3 has undetectable levels of VWF. Type 2 VWD variants are characterized by functional and binding defects. Initial diagnosis and follow-up depend mainly on measuring VWF protein and VWF activity and calculating the activity to protein ratio. Ristocetin cofactor activity (VWF:RCo) is the most widely used and gold standard activity assay. In our institute, we use a cutoff of VWF:RCo/VWF:Ag 〈 0.7 to screen for possible type 2 VWD. However, the use of this ratio is flawed by the presence of specific SNPs (I1380V, N1435S, and D1472H) in the A1 domain, especially in African Americans. These SNPs lead to a decrease in ristocetin binding to VWF and hence decreased VWF:RCo/VWF:Ag ratio. In this retrospective study, we analyzed the levels of VWF:AG and VWF:RCo based on patients’ ethnicity using an in-house data mining software from 2011 to 2016. Then, we validated several exon 28 primers, kindly provided by Dr. Montgomery (Blood Center of Wisconsin), used to detect type 2 mutations and SNPs in African Americans. We excluded cases diagnosed as positive for VWD and included only cases rendered nondiagnostic of VWD following a comprehensive panel including multimers, collagen binding, and molecular studies when indicated. In our Hispanic population (n = 936), VWF:Ag was 138.9% and 117% (average and median) and VWF:RCo was 110.5% and 93.0% (average and median); 43.2% of Hispanics had VWF:RCo/VWF:Ag 〈 0.7. In our African American population (n = 664), VWF:Ag was 163.0% and 138.5% (average and median) and VWF:RCo was 108.5% and 92.0% (average and median); 50.6% of the African American patients had VWF:RCo/VWF:Ag 〈 0.7. Patients from Caucasian origins (n = 242) had VWF:Ag of 149.6% and 113.0% (average and median) and VWF:RCo of 137.6% and 116.0% (average and median), respectively; 30.9% of Caucasian patients had VWF:RCo/VWF:Ag of less than 0.7. We then selected four random Hispanic cases with VWF:RCo/VWF:Ag 〈 0.5 as part of the validation study of exon 28 sequencing. Using a Sanger sequence assay, we found multiple benign/likely benign single-nucleotide polymorphisms (SNPs) at exon 28 that code for VWF antigen A1 domain. All four cases showed P.Thr1381Ala and P.Thr1547 = [OC1] polymorphism, three showed p.Val1565Leu polymorphism, and two showed p.Ala1555 = polymorphism. The statistical analysis of VWF:Ag/VWF:RCo levels from Hispanics shows a similar trend to African Americans with a high rate of cases with VWF:RCo/VWF:Ag 〈 0.7 in comparison to Caucasians. However, the finding of SNPs and absence of known African American polymorphisms suggest that these SNPs may be the cause of decreased ristocetin binding in Hispanics. This study calls for ethnic-based considerations in VWD workflows.
    Type of Medium: Online Resource
    ISSN: 0002-9173 , 1943-7722
    RVK:
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2039921-2
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  • 7
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2021
    In:  American Journal of Clinical Pathology Vol. 156, No. Supplement_1 ( 2021-10-28), p. S5-S6
    In: American Journal of Clinical Pathology, Oxford University Press (OUP), Vol. 156, No. Supplement_1 ( 2021-10-28), p. S5-S6
    Abstract: COVID-19 has caused a worldwide illness and New York has become the epicenter of COVID-19 in the United States. During the last year, The Bronx, one of the five boroughs of New York City, had the highest prevalence per capita in New York making it the epicenter of the pandemic. During the first wave of the pandemic, almost every labratory received tremendous amount of tests, and here we examined demographic and laboratory data, as well as trajectories of laboratory results, in order to determine the relation between these laboratory parameters, in particular tests of coagulation, to illness severity and mortality. Methods: This is a retrospective study of all positive COVID cases who were admitted between 2/22/2020-4/20/2020 at Montefiore Health System (MHS), a large tertiary care center in the Bronx. Together the ambulatory and hospital networks care for 2.8 million visits a year. All adults with positive COVID tests performed by MHS and who were admitted between 2/22/2020-4/20/2020 are considered. All hospitalized COVID positive cases were queried from the electronic medical record system. Physiological, demographic (age, sex, socioeconomic status and self-reported race and/or ethnicity) and laboratory data was captured. A subset of cases were chart-reviewed for accuracy and additional information. Statistical analysis was performed using R studio. Results: Discharge from hospital and mortality were the primary measured outcomes. 7096 patients tested positive for COVID, of which 2897 had an associated inpatient admission and 845 patients were seen in the ER and then discharged. A total of 767 COVID positive patients died during hospitalization. A multivariable logistic regression analysis shows increased odds ratio for mortality by age, gender(males & gt; females), BMI, neutrophil to lymphocyte ratio, Charlson Score, and D-Dimer. The receiver operating characteristic curve (ROC) of D-Dimer combined with age showed an area under the curve (AUC) of 0.77. The optimal cut-point, calculated using Youden’s index, for the initial D-Dimer to predict mortality was found to be 2.43ug/ml. D-Dimer trajectories between survivors and non-survivors showed a clear separation for non-survivors since admission. Conclusions: In this study we comprehensively studied demographic, physiological and laboratory parameters of COVID19+ minority patients in the Bronx, NYC, USA. This study confirms laboratory and clinical observations made by Wuhan studies of COVID19 infected patients. In particular the association of initial D-Dimer and its trajectory during hospitalization with mortality.
    Type of Medium: Online Resource
    ISSN: 0002-9173 , 1943-7722
    RVK:
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2021
    detail.hit.zdb_id: 2039921-2
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  • 8
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2022
    In:  American Journal of Clinical Pathology Vol. 158, No. Supplement_1 ( 2022-11-09), p. S15-S15
    In: American Journal of Clinical Pathology, Oxford University Press (OUP), Vol. 158, No. Supplement_1 ( 2022-11-09), p. S15-S15
    Abstract: To prevent and treat thrombotic complications in patients hospitalized with severe COVID-19 infection, anticoagulation treatments primarily with heparin and low molecular weight heparin have been recommended. Heparin-induced thrombocytopenia (HIT) is a rare but conceivably fatal reaction to heparin that is characterized by a sudden drop in platelet count accompanied by new onset of thrombosis 4-10 days after heparin exposure. The purpose of this retrospective study was to investigate the prevalence of thrombocytopenia and HIT in hospitalized COVID-19 patients, as well as their association with mortality. Methods 3,672 plasma samples were collected from patients admitted to the first wave of COVID-19 in our institution at New York City (March to May 2020). All patients admitted with a platelet count of less than 150 k/ul were assigned to the thrombocytopenic group. In addition, two groups with similar demographics and normal platelet counts were randomly selected based on discharge outcome: alive vs. deceased (n= 88 per group). PF4 IgG Elisa and heparin neutralization were carried out in accordance with the manufacturer's instructions. A positive HIT result required an optical density (OD) greater than 0.4 and heparin neutralization greater than 50%. Statistical analysis was done in R studio (V.1.4.1717) to analyze demographics (age, gender, ethnicity), initial laboratory data, anticoagulation on admission, and thrombosis. Results Only 86 of the 3,672 (2.3%) patients admitted had thrombocytopenia. Only 1 of the 86 patients tested positive for HIT (1.1% ). 4 cases of the non-survivors (4.5%) tested positive for HIT compared to none of the survivors in the two groups with normal platelet counts. One of these 4 cases had a history of thrombosis (DVT). Interestingly, the PF4 Elisa ODs in non-survivors were significantly higher than in survivors (0.09 vs. 0.06, p-value & lt; 0.001). Although the platelet count did not differ significantly between the two groups, the mean platelet volume (MPV) on admission and its maximum peak during hospitalization were significantly higher in non-survivors than in survivors. Conclusions We only found HIT positive cases among non-survivors, implying that HIT is associated with COVID severity. The incidence of HIT in severe COVID-19 patients appears to be higher than the pre-COVID-19 historical rates of HIT in hospitalized patients ( & lt;1%). Although thrombocytopenia is relatively uncommon in COVID-19 patients, the MPV was significantly higher in non-survivors, suggesting that platelet activation and destruction may explain the higher rate of HIT in COVID-19.
    Type of Medium: Online Resource
    ISSN: 0002-9173 , 1943-7722
    RVK:
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2039921-2
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  • 9
    In: Life, MDPI AG, Vol. 13, No. 3 ( 2023-02-23), p. 623-
    Abstract: Neutrophil Extracellular Traps (NETs) are large neutrophil-derived structures composed of decondensed chromatin, cytosolic, and granule proteins. NETs play an important role in fighting infection, inflammation, thrombosis, and tumor progression processes, yet their fast and reliable identification has been challenging. Smudge cells (SCs) are a subcategory of white cells identified by CellaVision®, a hematology autoanalyzer routinely used in clinical practice that uses digital imaging to generate “manual” differentials of peripheral blood smears. We hypothesize that a proportion of cells identified in the SC category by CellaVision® Hematology Autoanalyzers are actually NETs. We demonstrate that NET-like SCs are not present in normal blood samples, nor are they an artifact of smear preparation. NET-like SCs stain positive for neutrophil markers such as myeloperoxidase, leukocyte alkaline phosphatase, and neutrophil elastase. On flow cytometry, cells from samples with high percent NET-like SCs that are positive for surface DNA are also positive for CD45, myeloperoxidase and markers of neutrophil activation and CD66b. Samples with NET-like SCs have a strong side fluorescent (SFL) signal on the white count and nucleated red cells (WNR) scattergram, representing cells with high nucleic acid content. When compared to patients with low percent SCs, those with a high percentage of SCs have a significantly higher incidence of documented bacterial and viral infections. The current methodology of NET identification is time-consuming, complicated, and cumbersome. In this study, we present data supporting identification of NETs by CellaVision®, allowing for easy, fast, cost-effective, and high throughput identification of NETs that is available in real time and may serve as a positive marker for a bacterial or viral infections.
    Type of Medium: Online Resource
    ISSN: 2075-1729
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2662250-6
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  • 10
    In: Blood, American Society of Hematology, Vol. 138, No. Supplement 1 ( 2021-11-05), p. 4656-4656
    Abstract: Introduction: VEXAS syndrome (vacuoles, E1 ubiquitin ligase, X-linked, autoinflammatory, somatic) is a newly recognized inflammatory disorder caused by somatic mutations in the UBA1 gene. Bone marrows from these patients reveal a range of morphological changes in hematopoietic precursor cells. In this study, we aim to assess the laboratory indices and morphologic spectrum of bone marrow pathology in VEXAS syndrome. Methods: We identified 16 cases of VEXAS syndrome. All cases had confirmed UBA1 mutation. We reviewed bone marrow biopsies corresponding to the date of diagnosis. This study was approved by the Mayo Clinic Institutional Review Board. Results: All patients were male with a median age of 73 years - associated autoimmune disorders included Sweet syndrome, inflammatory arthritis, relapsing polychondritis and granulomatosis with polyangiitis. 14/16 patients had anemia with median hemoglobin of 10.4 (Range: 6.7- 14.1 g/dL). 15/16 had macrocytosis with median MCV 110.4 (Range: 94.8- 123.1 /fL). 5/16 had thrombocytopenia with median platelet count 174 (Range: 20- 500 x10^9/L). 7/16 had leukopenia with median WBC 3.65 (Range: 2.4- 11.6 x10^9/ L). The ESR and CRP medians were 61.0 mm/hr and 81.5 mg/L, respectively. Karyotype was performed in 12 patients of which 11 were normal and the remaining case showed a complex karyotype. An NGS panel targeting the most frequent myeloid disorder associated gene mutations was negative in 10/15 cases. GS for myeloid mutations revealed pathogenic mutations in 5 patients, involving genes TET2 (2/5), DNMT3A (2/5), and TP53 (1/5). Conclusions: Bone marrow findings in VEXAS syndrome, in this series of 16 patients, are individually non-specific, yet when taken altogether in the overtly abnormal cases, are very suggestive when the clinical index of suspicion is high. In such scenarios, the combined clinical and bone marrow findings should prompt discussion and consideration for UBA1 mutation testing given the significant clinical implications for patient management and prognosis. Disclosures Patnaik: StemLine: Research Funding; Kura Oncology: Research Funding. Warrington: Eli Lilly: Research Funding; Kiniksa: Research Funding.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
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    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2021
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
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