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Abstract Introduction During pregnancy, women are at an increased risk of developing iron-deficiency anemia. Objective The objective of this study was to assess the diagnostic performance of the reticulocyte hemoglobin equivalent (RET-He) in the early detection of iron-deficiency anemia in a group of pregnant women and to establish a reference range for this parameter in a group of control individuals. Method: A total of 60 patients and 130 control subjects were included in the study. Blood samples collected from the subjects were submitted to a complete blood count and a serum ferritin test and the data were analyzed by comparing the groups and ROC curves. Results The reference range found for the RET-He was between 29.75pg and 38.24pg, with a median of 35pg. The receiver operating characteristic (ROC) curve analysis for the ferritin parameter showed an area under the curve of 0.732 for the RET-He, 0.586 for hemoglobin, 0.551 for the mean corpuscular hemoglobin concentration and 0.482 for the mean corpuscular volume. Conclusion Early diagnosis of iron deficiency anemia in pregnancy is essential to prevent damage to both maternal and fetal health. The RET-He presents an excellent potential as an auxiliary tool for the diagnosis of iron deficiency in pregnant women.
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Humans , Female , Pregnancy , Adolescent , Adult , Middle Aged , Aged , Young Adult , Pregnancy , Iron Deficiencies , Reticulocytes , Hemoglobins , Anemia, Iron-Deficiency , HematologyABSTRACT
The advent of automation has made diagnosis of Anemia and to some extent its underlying cause easy. The objective of our study is to correlate RBC indices and RBC Histogram findings with peripheral smear to provide a better approach in accurate diagnosis of Anemia and to analyze their limitations. All cases of Anemia as per WHO reference range of Hemoglobin levels were included in our study. Patients who have received medical treatment for Anemia in past three months, patients having recent history of blood transfusion, patients having Leukemia or Leukemoid reactions were excluded from the study. Venous blood samples collected from these patients were run in SYSMEX automated hematology analyzer and complete blood count, Red Blood Cell (RBC) indices ie, Mean Corpuscular Volume (MCV), Mean Corpuscular Hemoglobin (MCH), Mean Corpuscular Hemoglobin Concentration (MCHC), Red Cell Distribution Width (RDW) and RBC Histogram were obtained and peripheral smears were examined. Anemia typing was done based on RBC indices and position, shape and skewing of RBC histograms, followed by peripheral smear examination for morphological typing of Anemia. The diagnoses made by peripheral smear versus RBC histogram and indices were compared and analysed
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Context: The International Consensus Group for Hematology Review (ICGHR) are essentially review criteria designed to reduce the number of manual smear reviews following analysis in automated hematology analyzers (AHAs). Although AHAs are an indispensable part of the present-day clinical laboratory, manual smear reviews still play an integral role in identifying morphological abnormalities and to confirm the results of the analyzers. Aims: The aim of this study is to evaluate the efficacy of the ICGHR criteria and our laboratory criteria using the Sysmex XN-1000 for manual peripheral smear review (MSR). Study Design: A prospective cross-sectional comparative study between the two sets of criteria for MSR was performed. Material and Methods: A total of 860 whole blood samples sent over a period of 19 months for complete blood count testing to our laboratory were collected using systematic random sampling. Truth tables were prepared for each set of criteria. Tests of proportion were used to compare performance specifications between both sets of criteria. Results: Using ICGHR criteria, sensitivity was 81.58%, specificity was 84.61%, 83.38% positive predictive value, and 82.92% negative predictive value. The microscopic smear review rate was 47.56% and efficiency was 83.14%. Using our laboratory criteria, sensitivity was 98.80%, specificity was 41.40%, positive predictive value of 61.46%, and negative predictive value of 97.34%. The microscopic smear review rate was 78.14% and efficiency 69.30%. Conclusions: There was a significant reduction in the microscopic smear review rates using the ICGHR criteria compared to our laboratory criteria. The ICGHR criteria can thus be adapted to daily laboratory practice provided they are first optimized and locally validated before use.
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Use of automated hematology analyzers for routine blood count reporting has increased the reproducibility and accuracy of test results. However, at times, these instruments may generate spurious test results. Such results can result in inappropriate investigations or treatment decisions in patients. Spuriously normal or high platelet counts carry the risk of under diagnosis of the true thrombocytopenia with adverse clinical implications. We present a patient with smoldering myeloma with spurious platelet count due to cryoglobulins.
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Con el objetivo de mejorar el flujo de trabajo en el Laboratorio de Hemoci-tología se evaluó el desempeño analítico y eficiencia del sistema de alarmas de dos contadores hematológicos de última generación, Coulter LH750 y Abbott CEL-DYN Ruby, para la resolución de muestras patológicas en una población de pacientes pediátricos, considerando como método de referencia la revisión microscópica y la realización del recuento diferencial leucocitario en forma manual de los extendidos de sangre periférica. Se procesaron 178 muestras seleccionadas de la carga de trabajo diario del Laboratorio en ambos contadores, se analizaron los reportes emitidos y se realizó el diferencial manual. Se encontró una excelente concordancia entre los dos instrumentos para el recuento de leucocitos, eritrocitos, hemoglobina, VCM y plaquetas, y entre el diferencial manual y el reportado por ambos equipos. La eficiencia de las alarmas en ambos analizadores fue similar, 77% para CELL-DYN Ruby y 71,3% para LH750. La tasa de falsos negativos fue de 3,4% y 4,0% respectivamente. La tasa de falsos positivos en ambos equipos fue 17%. Se puede concluir que los analizadores evaluados presentan un desempeño comparable. Cada laboratorio debe considerar las características de la población de pacientes que recibe para establecer criterios estrictos y sistemáticos para la revisión del frotis.
The goal of the hematology laboratory is to improve workflow efficiency by optimizing instrument results and flagging sensitivity with its daily manual blood smears requirements. Two hematology analyzers (Coulter LH750 and CEL-DYN Ruby Abbott) were evaluated to determine analytical performance and efficiency in daily work at the Central Laboratory of a Pediatric Hospital. Microscopic revision was considered the reference method. A total of 178 pathological blood samples randomly selected from ambulatory and in-patients were analyzed in both analyzers. An excellent correlation between both instruments for leukocytes, erythrocytes, hemoglobin, MCV and platelet count was observed; also close agreement of results between manual differential and automated count. The efficiency of alarms triggered by the automated hematology analyzer was similar. Total efficiency of Cell-Dyn Ruby was 77% and 71.3% in the LH750. The false negative rate was 3.4% and 4.0% for the LH750 and Ruby respectively. The false positive rate was 17% for both instruments. It can be concluded that the two analyzers tested have a comparable analytical performance and each clinical laboratory must consider the characteristics of their population in order to establish critical and systematic criteria for manual microscopic review.
A fim de melhorar o fluxo de trabalho no Laboratòrio de Hematologia avaliou-se o desempenho analítico e a eficiencia do sistema de alarmes dos dois contadores de hematologia de última geragáo, Coulter LH750 e Abott CEL-DYN Ruby, para a resolugáo de amostras patológicas numa populagáo de pacientes pediatricos. Considerou-se como método de referencia a revisáo microscòpica e diferencial manual dos esfregagos de sangue periférico. Foram processadas 178 amostras seleccionadas da carga de trabalho diàrio do Laboratòrio em ambos contadores, foram analisados os relatórios emitidos e se realizou o diferencial manual. Encontrou-se uma excelente concordancia entre os dois instrumentos para a contagem de leucócitos, eritrocitos, hemoglobina, VCM e plaquetas, e entre el diferencial manual e o relatado por ambas equipes. A eficiencia dos alarmes em ambos os analisadores foi semelhante, 77% para CELL-DYN Ruby e 71,3% para LH750. A taxa de falsos negativos foi de 3,4% e 4,0%, respectivamente. A taxa de falsos positivos foi de 17% para ambos equipes. Pode-se concluir que os analisadores avaliados tem um desempenho comparàvel. Cada laboratòrio deve considerar as características da populagáo de pacientes que recebe para estabelecer critérios rigorosos e sistemáticos para a revisáo de esfregagos.
Subject(s)
Humans , Cost Efficiency Analysis , Hematologic Tests , Hospitals, Pediatric , Proof of Concept Study , Clinical Alarms , Efficacy , Hematology , Review , WorkflowABSTRACT
Objective To investigate comparability between Sysmex different hematology analyzers.The consistency of all he-matology analyzers with the same fresh sample.Methods Selected Sysmex XE-2100 as reference instrument which attend external quality assessment.Fresh high,medium and low blood were detected in Sysmex XS-800i,Sysmex XT-4000i and Sys-mex XT-1800i,compared results of WBC,RBC,HGB,HCT,MCV and PLT.Results The bias of XS-800i and XE-2100 was WBC 2.85%,RBC 1.44%,HGB 0.75%,HCT 2.11% and PLT 5.53%.The bias of XT-4000i and XE-2100 was WBC 1.26%,RBC 0.95%,HGB 0.68%,HCT 1.35% and PLT 2.68%.The bias of XT-1800i and XE-2100 was WBC 5.21%, RBC 1.96%,HGB 1.60%,HCT 1.96% and PLT 4.95%.It had good compatability.All various parameters was in the al-lowed range.Conclusion Should maintenance and compare the hematology analyzers periodically,found the problem then calibration instruments in time,ensure the consistency of measurement results between different instruments and guarantee accuracy of the results.
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Objective To investigate the technical charactenstics ot SYSMEX XS1000i 5-part differential automated hematological analyzer and its clinical applications.Methods 209 samples were analyzed with the analyzer of XS1000i and compared to the results from Beckman-Coulter LH750 analyzer.The main parameters from XS1000i,such as precision within-run,day to day precision and carryover contamination rates etc,were recorded respectively in 509 samples to compare the difference between the instrumental and optical examination.Results All variation coefficients of precision from XSI000i were within the manufacturer.The carryover contamination rates of WBC,RBC,Hb,HCT and PLT were 0.19%,0.93%,0,-0.88%,-0.76%,respectively.The parameters of XS1000i were correlated with the results of LH750 except basophil granulocyte.The correlation coefficients of WBC,RBC, HGB and PLT were 0.994 5,0.996 8,0.997 0 and 0.974 6 ,respectively.The sensitivity of warning flags in immature leukocytes was 100% and the specificity was 69.7%,the sensitivity of warning flags in atypical lymphocyte was 100% and the specificity was 66.7%.Especially in 3 leukocytopenia that was induced by chemotherapy in patients with leukemia who had only few immature cells existed in the peripheral blood,the parameters of XS1000i were positive,and correlated with the results of detection of minimal residual disease with flow cytometry.Conclusions The warning system of XSIO00i provides more valuable information for manual microscopic examination.If it is combined with flow cytometry,the advantages in detection of residual leukemic cell will be fully displayed.
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Objective To set up a calibration system for automated hematology analyzers with fresh blood in clinical laboratory.Methods Fresh blood assigned by a traceable measurement system was used to calibrate nine hematology analyzers, and compared the bias before and after calibration.Results In the parameters to be calibrated for the hematology analyzers, there was about 55.6% (25/45) over allowable bias before calibration but 15.6% (7/45) after calibration with fresh blood. Among the results of bias over allowable upper limit were mostly existed in 3-part differential hematology analyzers, and mainly focused on WBC and PLT.Conclusion It is available to calibrate different hematology analyzers with fresh blood in a clinical laboratory.