scholarly journals Do Hemoglobin Concentration and Anemia Prevalence Differ Between Capillary and Venous Blood and Between Analysis Methods?

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 922-922
Author(s):  
Amanda Wendt ◽  
Jillian Waid ◽  
Anna Müller-Hauser ◽  
Nicholas Kyei ◽  
Shafinaz Sobhan ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Venous Blood ◽  
Hemoglobin Concentration ◽  
Mean Difference ◽  
Blood Collection ◽  
Blood Samples ◽  
Analysis Methods ◽  
Prevalence Estimates ◽  
Hematology Analyzer ◽  
Automated Hematology Analyzer

Abstract Objectives Our objective was to compare hemoglobin concentration and anemia prevalence between (1) analysis methods, i.e., the portable HemoCue 201 + and the Sysmex XP-100 automated hematology analyzer, and (2) blood matrix, i.e., venous and capillary, in women and young children. Methods We collected capillary and venous blood samples from 349 non-pregnant women (NPW), 45 pregnant women (PW), and 167 children aged 6–36 months in rural Sylhet Division, Bangladesh in late 2019. We measured hemoglobin concentration in capillary and venous blood using HemoCue 201 + at the point of blood collection in the villages. In addition, hemoglobin concentration was measured in venous EDTA blood samples in the lab using the XP-100 Sysmex automated hematology analyzer within 6 hours of collection. Hemoglobin values were compared using paired t-tests, while anemia prevalence estimates were compared using McNemar tests. Results Venous hemoglobin concentrations were similar (mean difference: 0.3 g/L) when measured by HemoCue and the hematology analyzer. However, among NPW, there was strong evidence that anemia prevalence was higher when measured by HemoCue compared to the hematology analyzer, with similar trends in PW and children. Mean hemoglobin concentrations in capillary blood were lower overall (mean difference: 5 g/L; P ≤ 0.001) and in all subgroups (NPW, PW, and children) compared to venous blood. Anemia prevalence was higher in each population group using capillary (NPW: 37%; PW: 51%; children: 21%) compared to venous measures (NPW: 23%; PW: 36%; children: 10%). Conclusions Across all groups, capillary measures resulted in significantly lower hemoglobin concentrations and higher anemia prevalence estimates, thus likely overestimating anemia in the population. Venous blood samples measured by the two analytic methods were similar. This may point to a biological difference between capillary and venous blood. Funding Sources Data collection was primarily supported by the German Ministry of Education and Research (BMBF). The first author received support from the Alexander von Humboldt Foundation and a Thrasher Research Fund Early Career Award.

scholarly journals Validation of the BD FACSPresto system for the measurement of CD4 T-lymphocytes and hemoglobin concentration in HIV-negative and HIV-positive subjects

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Xiaofan Lu ◽  
Hanxiao Sun ◽  
Haicong Li ◽  
Wei Xia ◽  
Hao Wu ◽  
...  
Keyword(s):  
Point Of Care ◽  
Venous Blood ◽  
Method Comparison ◽  
Hemoglobin Concentration ◽  
Hiv Positive ◽  
Reference Standard ◽  
Blood Samples ◽  
Deming Regression ◽  
Hematology Analyzer ◽  
Hiv Negative

Abstract This study aimed to compare the performance of the BD FACSPresto system with the conventional standard-of-care technologies for the measurement of absolute CD4 count (AbsCD4), CD4 percentage (CD4%) and total hemoglobin concentration (Hb) in capillary and venous blood samples of HIV-negative and HIV-positive subjects. A total of 1304 participants were included in this prospective cohort study. Both venous and capillary blood samples were analyzed using the BD FACSPresto system and the results were compared against the BD FACSCalibur for enumerating AbsCD4 and CD4% and Sysmex XT-4000i hematology analyzer for determining Hb levels. Method comparison studies were performed using Deming regression and Bland–Altman plots. The Deming regression analyses comparing the accuracy of the BD FACSPresto system with the reference standard technologies demonstrated a significant linear correlation between the AbsCD4, CD4%, and Hb values generated by the two platforms. The 95% CI of the slopes for AbsCD4, CD4%, and Hb levels were 0.94–0.99, 0.99–1.01 and 0.86–0.93, respectively (P < 0.001). Bland–Altman plots for AbsCD4, CD4%, and Hb levels demonstrated close agreement between the BD FACSPresto system and the reference standards for all study participants. The performance and accuracy of BD FACSPresto system was comparable to the reference standard technologies. The BD FACSPresto system can be used interchangeably with BD FACSCalibur platform for CD4 and Sysmex XT-4000i hematology analyzer for Hb concentrations in resource-limited settings thus, improving accessibility to point-of-care testing services.

Measurement of the Cellular Hemoglobin Concentration by Laser Scatter Method from Excessive Lipemic Sample: CASE REPORT

2019 ◽  
Vol 22 (7) ◽  
pp. 502-505
Author(s):  
Ataman Gönel ◽  
Ismail Koyuncu
Keyword(s):  
Venous Blood ◽  
Hemoglobin Concentration ◽  
Female Child ◽  
Acute Tonsillitis ◽  
Scatter Method ◽  
Normal Limits ◽  
Pediatric Clinic ◽  
Automated Hematology Analyzer ◽  
Familial Hyperlipidemia ◽  
Sample Case

A 33-month old female child presented at a pediatric clinic with acute tonsillitis, and it was subsequently discovered that she had familial hyperlipidemia. Measurement of the patient’s whole blood tests was performed by a multiparameter automated hematology analyzer, the CELLDYN Ruby System&#174; (Abbott, Lake Forest, USA) using venous blood extracted from a tube containing 3.0 mL of EDTA. Although her hematocrit levels were within normal limits, the hemoglobin (Hgb) level, mean corpuscular volume (MCH) and mean corpuscular Hgb concentration (MCHC) could not be determined using the spectrophotometric method. The results of these tests could not be measured when repeated using dilution. When the sample was left to rest for several minutes, it was observed to be excessively lipemic. The measurements were repeated using the Alinity HQ Analyzer&#174; (Abbott), which determines Hgb concentration using laser scatter and spectrophotometry. Hgb cellular concentration was incorrectly measured as being 21.9 mg/dL using routine spectrophotometry (denoted by a flag indicating Hgb interference) and correctly found to be 10.8 mg/dL. Thus, in samples of excessive lipemia, Hgb, MCH, and MCHC levels cannot be measured accurately using spectrophotometry. Hematology analyzers that can measure cellular hemoglobin (cHGB) and average erythrocyte hemoglobin concentration (cHCM) by laser scatter method may be recommended when analyzing a blood sample that contains excessive lipemia.

scholarly journals Evaluation of the performance of sysmex XN-3100 automated hematology analyzer regarding the sysmex XE-2100 and microscopic examination

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Said Incir ◽  
Kerim Erhan Palaoglu
Keyword(s):  
Comparative Method ◽  
Reference Method ◽  
Turnaround Time ◽  
Analytical Sensitivity ◽  
Biological Variability ◽  
Comparison Analysis ◽  
Blood Samples ◽  
Hematology Analyzer ◽  
Quality Control Materials ◽  
Automated Hematology Analyzer

AbstractObjectivesWe performed a verification study of the Sysmex XN-3100 hematology analyzer in comparison with the XE-2100 according to the guidelines of the Clinical and Laboratory Standards Institute (CLSI) and the International Council for Standardization in Hematology (ICSH).Materials and methodsBlood samples and quality control materials were used for precision. For comparison, we used the current XE-2100 as the comparative method and analyzed 540 blood samples. The Passing-Bablok and Bland-Altman tests were performed according to the CLSI EP09-A3 and a carryover study was performed according to the CLSI H26-A2 guidelines. The flagging performance of the two analyzers was compared, using two experienced laboratory technicians as the reference method.ResultsThe Sysmex XN-3100 demonstrated high levels of precision for most parameters. For the comparison analysis, all parameters, except for MCHC, monocytes and basophils were within the systematic error limits of desirable biological variability criterion (SeDBV). The carryover was less than 0.4% for all parameters. The flagging performance of the XN-3100 was satisfactory and the overall efficiency was high.ConclusionsThe XN-3100 not only showed a strong correlation and agreement with the XE-2100 but also displayed a comparable analytical sensitivity, and increased specificity, which may result in an improved turnaround time and throughpu.

scholarly journals Comparison of Transforming Growth Factor-Beta 1 Concentration in Preeclampsia and Normal Pregnancy Women

2017 ◽  
Vol 9 (1) ◽  
pp. 49 ◽  
Author(s):  
Yusrawati Yusrawati ◽  
Dyka Aidina ◽  
Eti Yerizel
Keyword(s):  
Growth Factor ◽  
Pregnant Women ◽  
Transforming Growth Factor Beta ◽  
Transforming Growth Factor ◽  
Normal Pregnancy ◽  
Mean Difference ◽  
Blood Samples ◽  
The Mean ◽  
Growth Factor Beta ◽  
Tgf Β1

BACKGROUND: According to the theory of endothelial dysfunction, the pathogenesis of preeclampsia is associated with the imbalance of angiogenic and anti-angiogenic factors. Transforming growth factor-beta 1 (TGF-β1) has also proposed as a proangiogenic factor that influences preeclampsia. This study was conducted to compare a mean difference of TGF-β1 between preeclampsia and normal pregnancy.METHODS: This study was an observational crosssectional study with 25 subjects of pregnant women with preeclampsia and 25 subjects of normotensive pregnant women. The study was conducted in Dr. Reksodiwiryo Hospital, Bhayangkara Hospital, and Dr. Rasidin Hospital in Padang, Indonesia from October 2015 to January 2016. For the determination of TGF-β1 concentration, peripheral Abstract venous blood samples were taken. The blood samples wereanalyzed by enzyme-linked immunosorbent assay (ELISA) in Biomedical Laboratory, Faculty of Medicine, Andalas University. The mean difference was statically analyzed by independent samples T-test.RESULTS: The mean difference of TGF-β1 was lower in preeclampsia group than normal pregnancy group (2.02±0.99 ng/mL vs. 3.24±2.67 ng/mL; p<0.05).CONCLUSION: The TGF-β1 concentration was lower in pregnant women with preeclampsia. Thus, it may have a role as a marker in preeclampsia.KEYWORDS: preeclampsia, normal pregnancy, transforming growth factor-beta1, TGF-β1

scholarly journals Association study of rs1801282 PPARG gene polymorphism and immune cells and cytokine levels in a Spanish pregnant women cohort and their offspring

2020 ◽  
Vol 27 (1) ◽  
Author(s):  
Maria García-Ricobaraza ◽  
Mercedes García-Bermúdez ◽  
Francisco J. Torres-Espinola ◽  
M. Teresa Segura Moreno ◽  
Mathieu N. Bleyere ◽  
...  
Keyword(s):  
Immune System ◽  
Gene Polymorphism ◽  
Cord Blood ◽  
Pregnant Women ◽  
Venous Blood ◽  
Innate Immune ◽  
Peroxisome Proliferator ◽  
Blood Samples ◽  
Inflammatory Reactions ◽  
Immune Parameters

Abstract Background Peroxisome proliferator activated receptor gamma (PPARG) belongs to the nuclear receptor superfamily functioning as transcription factors to regulate cellular differentiation, development and metabolism. Moreover, it has been implicated in the regulation of lipid metabolism, as well as the maturation of monocytes/macrophages and the control of inflammatory reactions. The aim of this study was to evaluate the relationship between the Pro12Ala (rs1808212) PPARG gene polymorphism on immune molecular and cellular components in mothers and their offspring participating in the PREOBE study. Methods DNA from maternal venous blood samples at 24, 34 and 40 gestational weeks, plus cord blood samples was extracted. Pro12Ala PPARG polymorphism genotyping was performed, and immune system markers were analyzed by flow cytometry. Results Study findings revealed no effect of rs1808212 PPARG genotypes on innate immune parameters in mothers and their offspring; however, CD4 + /CD8 + ratio were decreased at 24 and 34 weeks in pregnant women carrying the CG (Pro12Ala) rs1808212 polymorphism, (p = 0,012 and p = 0,030; respectively). Only CD19 levels in peripheral blood were significantly higher at delivery in pregnant women carrying the CC (Pro12Pro) genotype (p ≤ 0.001). Moreover, there were statistically significant differences in leukocytes and neutrophils maternal levels at 34 weeks of gestation, being lower in carriers of Pro12Ala genotype (p = 0.028 and p = 0.031, respectively). Conclusions Results suggest that Pro12Ala PPARG polymorphism may have an effect on some cell and immune parameters in pregnant women during pregnancy and at time of delivery. However, newborn innate immune system does not seems to be influenced by PPARG Pro12Ala polymorphism in cord blood.

Variability in haemoglobin concentration by measurement tool and blood source: an analysis from seven countries

2020 ◽  
pp. jclinpath-2020-206717
Author(s):  
Aviva I Rappaport ◽  
Crystal D Karakochuk ◽  
Sonja Y Hess ◽  
Ralph D Whitehead, Jr. ◽  
Sorrel M L Namaste ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Venous Blood ◽  
Sampling Site ◽  
Haemoglobin Concentration ◽  
Measurement Tool ◽  
Blood Collection ◽  
Large Variability ◽  
Factors Affecting ◽  
Haematology Analyser ◽  
Ghanaian Women

ObjectiveWe explore factors such as the blood sampling site (capillary vs venous), the equipment (HemoCue vs automated haematology analyser) and the model of the HemoCue device (201+ vs 301) that may impact haemoglobin measurements in capillary and venous blood.MethodsEleven studies were identified, and bias, concordance and measures of diagnostic performance were assessed within each study.FindingsOur analysis included 11 studies from seven countries (Cambodia, India, The Gambia, Ghana, Laos, Rwanda and USA). Samples came from children, men, non-pregnant women and pregnant women. Mean bias ranged from −8.7 to 2.5 g/L in Cambodian women, 6.2 g/L in Laotian children, 2.4 g/L in Ghanaian women, 0.8 g/L in Gambian children 6–23 months and 1.4 g/L in Rwandan children 6–59 months when comparing capillary blood on a HemoCue to venous blood on a haematology analyser. Bias was 8.3 g/L in Indian non-pregnant women and 2.6 g/L in Laotian children and women and 1.5 g/L in the US population when comparing capillary to venous blood using a HemoCue. For venous blood measured on the HemoCue compared with the automated haematology analyser, bias was 5.3 g/L in Gambian pregnant women 18–45 years and 11.3 g/L in Laotian children 6–59 months.ConclusionOur analysis found large variability in haemoglobin concentration measured on capillary or venous blood and using HemoCue Hb 201+ or Hb 301 or automated haematology analyser. We cannot ascertain whether the variation is due to differences in the equipment, differences in capillary and venous blood, or factors affecting blood collection techniques.

scholarly journals Platelet Parameters Assessment among Sudanese Pregnant Women with Preeclampsia Attending Wad Medani Obstetrics and Gynecology Teaching Hospital

2021 ◽  
Author(s):  
Ejlal Omer FadlElseed ◽  
Khalid Abdelsamea Mohamedahmed ◽  
Aboagala Mustafa Mohamed ◽  
Muatez Ibrahim Hassan ◽  
Yousif E/Hameed Mohammed ◽  
...  
Keyword(s):  
Platelet Count ◽  
Pregnant Women ◽  
Teaching Hospital ◽  
Venous Blood ◽  
Obstetrics And Gynecology ◽  
P Value ◽  
Major Health ◽  
Platelet Indices ◽  
Study Results ◽  
Automated Hematology Analyzer

Abstract Background: Preeclampsia is considered one of the major health problems associated with pregnancy and one of the causes of maternal mortality. The pathogenesis of preeclampsia associated with platelet activation.Methods: This is a case-control laboratory-based study carried out in Wad Medani Obstetrics and Gynecology Teaching Hospital, Gezira State, Sudan from January to November 2020. The study aimed to evaluate the platelet parameters (platelet count and platelet indices) in pregnant women with preeclampsia. A total of 50 pregnant women with preeclampsia as cases (32.20 ± 3.21 years) and 50 normotensive pregnant women as controls (30.68 ± 2.85 years) participated in this study. Three ml of venous blood samples were collected from all participants in K3 EDTA containers. platelet parameters (platelet count and platelet indices) were determined using Mindray BC 3000 Automated Hematology Analyzer. Data were analyzed using the SPSS computer program (version 22). Results: The study results showed that the thrombocytopenia account for 56 %, all cases with low PCT (100%). Furthermore the means of PLTs count, PCT and PDW in cases were (144.40 ± 31.80 × 109/L, 0.13 ± 0.03 % and 15.80 ± 0.45 fl respectively) versus controls (269.40 ± 72.50 × 109/L, 0.22 ± 0.05 % and 15.50 ± 0.29 fl respectively), giving statistically significant differences (P value = 0.000, 0.003 and 0.022 respectively). The mean of PCT of mild cases was lower than severe cases (P value = 0.004); but there were no significant differences in PLTs count, MPV and PDW (P value = 0.379, 0.283 and 0.075 respectively).Conclusion: The study concluded that platelet count (PLTs count) and plateletcrit (PCT) were significantly decreased in pregnant women with preeclampsia especially; so platelet parameters especially (PLTs count and PCT) should be included for assessing and predicting the risk of severe preeclampsia.

scholarly journals Impact of Preeclampsia onPlatelet Count and Platelet Indices among Sudanese Pregnant Women in Gezira State

2021 ◽  
Vol 5 (2) ◽  
Keyword(s):  
Platelet Count ◽  
Pregnant Women ◽  
Venous Blood ◽  
P Value ◽  
Major Health ◽  
Platelet Indices ◽  
Study Results ◽  
The Mean ◽  
Automated Hematology Analyzer ◽  
Program Version

Background: Preeclampsia is considered one of the major health problems is associated with pregnancy and one of the causes of maternal mortality. The pathogenesis of preeclampsia associated with platelets activation. Objectives: The aim of this study was to evaluate the platelets parameters (platelet count and platelet indices) in pregnant women with preeclampsia. Methodology: This is a case-control laboratory-basedstudy carried out in Wad Medani Obstetrics and Gynecology Teaching Hospital, Gezira State, Sudan from January to November 2020. A total of 50 pregnant women with preeclampsia as cases (32.20 ± 3.21 years) and 50 normotensive pregnant women as controls (30.68 ± 2.85 years)participated in this study. Three ml of venous blood samples were collected from all participants in K3 EDTA containers. platelets parameters (platelet count and platelet indices) were determined using Mindray BC 3000 Automated Hematology Analyzer. Data were analyzed usingthe SPSS computer program (version 22). Results: The study results showed that the thrombocytopenia account for 56 %, all cases with low PCT (100%). Furthermore, the means of PLTs count, PCT and PDW in cases were (144.40 ± 31.80 × 109/L, 0.13 ± 0.03 % and 15.80 ± 0.45 fl respectively) versus controls (269.40 ± 72.50 × 109/L, 0.22 ± 0.05 % and 15.50 ± 0.29 fl respectively), giving statistically significant differences (P value = 0.000, 0.003 and 0.022 respectively). The mean of PCT of mild cases was lower than severe cases (P value = 0.004); but there were no significant differences in PLTs count, MPV and PDW (P value = 0.379, 0.283 and 0.075 respectively). Conclusion: The study concluded that platelet count (PLTs count) and plateletcrit (PCT) were significantly decreased in pregnant women with preeclampsia especially, so, platelets parameters especially (PLTs count and PCT) should beincluded for assessing and predictingthe risk of severe preeclampsia.

scholarly journals JAK2V617F-positive clonal hematopoiesis of indeterminate potential in pregnant women

2019 ◽  
Vol 13 (3) ◽  
pp. 204-210
Author(s):  
I. A. Olkhovskiy ◽  
J. G. Garber ◽  
A. S. Gorbenko ◽  
M. A. Stolyar ◽  
O. M. Miller ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Gestational Hypertension ◽  
Lymphoblastic Leukemia ◽  
Venous Blood ◽  
First Trimester ◽  
Polymerase Chain Reaction Test ◽  
Routine Laboratory ◽  
Jak2 Mutation ◽  
Blood Samples ◽  
Increased Risk

Aim: to assess the prevalence of V617F somatic mutation of the JAK2 gene in pregnant women.Materials and methods. This non-interventional study was performed in the framework of routine clinical practice and included 1532 samples of venous blood from pregnant women who applied for medical assistance at Krasnoyarsk Regional Clinical Center for Maternal and Child Welfare. We used blood samples left after all routine laboratory tests had been done. These leftovers were pooled in the way that ensured an equal ratio of nucleated cells. Each pool contained 7 separate blood samples. The unused samples that remained after the pooling were frozen and stored at –20°C until the end of entire testing procedure. The V617F JAK2 mutation was detected by the real-time allele-specific polymerase chain reaction test.Results. Among the examined pregnant women, 6 (0.4 %) were identified as carriers of V617F JAK2 mutation. Three women with this mutation suffered from infertility for 4, 5, and 10 years; two of them had repeated miscarriages in the first trimester of pregnancy. The 6 women – carriers of this mutations had no concomitant genetic polymorphisms typical of thrombophilia (factors FII, FV), and no abnormal coagulation characteristics. Analysis of their medical records showed that in the past, two of these women had gestational hypertension, one developed a clinical picture of preeclampsia, and another one (with the maximum presence of the mutant allele) had a history of acute lymphoblastic leukemia followed by stable remission.Conclusion. The routine laboratory detection of the V617F JAK2 mutation can facilitate timely identification of the increased risk of pregnancy pathology, as well as timely diagnosis of hematological cancer.

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