Red Blood Cell Volume Distribution Width (RDW) in Uraemic Patients on Chronic Haemodialysis

1989 ◽  
Vol 12 (3) ◽  
pp. 170-174 ◽  
Author(s):  
D. Docci ◽  
C. Delvecchio ◽  
C. Gollini ◽  
F. Turci ◽  
L. Baldrati ◽  
...  
Keyword(s):  
Blood Cell ◽  
Cell Volume ◽  
Red Blood Cell ◽  
Iron Status ◽  
Volume Distribution ◽  
Chronic Haemodialysis ◽  
Distribution Width ◽  
Iron Administration ◽  
Parallel Increase ◽  
Normal Individuals

Red blood cell volume distribution width (RDW) was obtained with the Coulter counter in 60 haemodialysis patients and 55 normal individuals. RDW tended to be higher in the former and the degree of increase was to some extent correlated with the underlying nephropathy. Although RDW failed to correlate with conventional tests of iron status, it was observed that iron administration could produce a decrease toward normal in RDW and a parallel increase in haemoglobin when the initial RDW was increased. In contrast, the response to iron was negligible in the patients with normal RDW basally. It was concluded that high RDW is an acceptable indicator of iron deficiency in haemodialysis patients.

scholarly journals Inherited microcytic anemias

Hematology ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 465-470
Author(s):  
Maria Domenica Cappellini ◽  
Roberta Russo ◽  
Immacolata Andolfo ◽  
Achille Iolascon
Keyword(s):  
Iron Deficiency ◽  
Blood Cell ◽  
Iron Metabolism ◽  
Red Blood Cell ◽  
Iron Status ◽  
Transferrin Saturation ◽  
Microcytic Anemia ◽  
Deficiency Anemia ◽  
Mean Corpuscular Hemoglobin ◽  
Distribution Width

Abstract Inherited microcytic anemias can be broadly classified into 3 subgroups: (1) defects in globin chains (hemoglobinopathies or thalassemias), (2) defects in heme synthesis, and (3) defects in iron availability or iron acquisition by the erythroid precursors. These conditions are characterized by a decreased availability of hemoglobin (Hb) components (globins, iron, and heme) that in turn causes a reduced Hb content in red cell precursors with subsequent delayed erythroid differentiation. Iron metabolism alterations remain central to the diagnosis of microcytic anemia, and, in general, the iron status has to be evaluated in cases of microcytosis. Besides the very common microcytic anemia due to acquired iron deficiency, a range of hereditary abnormalities that result in actual or functional iron deficiency are now being recognized. Atransferrinemia, DMT1 deficiency, ferroportin disease, and iron-refractory iron deficiency anemia are hereditary disorders due to iron metabolism abnormalities, some of which are associated with iron overload. Because causes of microcytosis other than iron deficiency should be considered, it is important to evaluate several other red blood cell and iron parameters in patients with a reduced mean corpuscular volume (MCV), including mean corpuscular hemoglobin, red blood cell distribution width, reticulocyte hemoglobin content, serum iron and serum ferritin levels, total iron-binding capacity, transferrin saturation, hemoglobin electrophoresis, and sometimes reticulocyte count. From the epidemiological perspective, hemoglobinopathies/thalassemias are the most common forms of hereditary microcytic anemia, ranging from inconsequential changes in MCV to severe anemia syndromes.

Blood flow and volume distribution during forced submergence in Pekin ducks (Anas platyrhynchos)

1988 ◽  
Vol 66 (7) ◽  
pp. 1589-1596 ◽  
Author(s):  
M. R. A. Heieis ◽  
David R. Jones
Keyword(s):  
Blood Flow ◽  
Blood Cell ◽  
Red Blood Cells ◽  
Cell Volume ◽  
Red Blood Cell ◽  
Blood Cells ◽  
Area Measurement ◽  
Volume Distribution ◽  
Residual Blood ◽  
Time Required

Blood is the major oxygen store in ducks forced to dive, and underwater endurance depends on how much of this store can be used by oxygen-sensitive tissues such as the heart and brain. Arterial injection of macroaggregated albumin labelled with technetium-99 m, which is trapped and held by capillaries, showed that circulation in dives was restricted to the thoracic and head areas. However, tracing red blood cells labelled with technetium-99 m as they were injected during dives showed not only that the time required for the activity to reach equilibrium was 4–10 times longer than when labelled cells were injected into resting ducks but also that blood flow continued in the leg and visceral regions. Tracing red blood cells, labelled with technetium-99 m and mixed in the circulation before a dive, during the dive showed that labelled red blood cells were redistributed from the peripheral and visceral areas to the central cardiovascular area. Measurement of circulating red blood cell volume during and after diving showed that, on average, 75.24 ± 4.56% of the total red blood cell volume was circulated during forced submergence. Hence, in forced dives, red blood cell volume is positioned in such a manner that the heart and brain have access to the oxygen stored there, and the residual blood flow in the periphery ensures that most of the red blood cell volume is circulated.

Identifying key predictors of mortality in young patients on chronic haemodialysis—a machine learning approach

2020 ◽  
Author(s):  
Verena Gotta ◽  
Georgi Tancev ◽  
Olivera Marsenic ◽  
Julia E Vogt ◽  
Marc Pfister
Keyword(s):  
Machine Learning ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Young Patients ◽  
Adult Patients ◽  
Learning Approach ◽  
Chronic Haemodialysis ◽  
Dialysis Dose ◽  
Distribution Width ◽  
Machine Learning Approach

Abstract Background The mortality risk remains significant in paediatric and adult patients on chronic haemodialysis (HD) treatment. We aimed to identify factors associated with mortality in patients who started HD as children and continued HD as adults. Methods The data originated from a cohort of patients <30 years of age who started HD in childhood (≤19 years) on thrice-weekly HD in outpatient DaVita dialysis centres between 2004 and 2016. Patients with at least 5 years of follow-up since the initiation of HD or death within 5 years were included; 105 variables relating to demographics, HD treatment and laboratory measurements were evaluated as predictors of 5-year mortality utilizing a machine learning approach (random forest). Results A total of 363 patients were included in the analysis, with 84 patients having started HD at <12 years of age. Low albumin and elevated lactate dehydrogenase (LDH) were the two most important predictors of 5-year mortality. Other predictors included elevated red blood cell distribution width or blood pressure and decreased red blood cell count, haemoglobin, albumin:globulin ratio, ultrafiltration rate, z-score weight for age or single-pool Kt/V (below target). Mortality was predicted with an accuracy of 81%. Conclusions Mortality in paediatric and young adult patients on chronic HD is associated with multifactorial markers of nutrition, inflammation, anaemia and dialysis dose. This highlights the importance of multimodal intervention strategies besides adequate HD treatment as determined by Kt/V alone. The association with elevated LDH was not previously reported and may indicate the relevance of blood–membrane interactions, organ malperfusion or haematologic and metabolic changes during maintenance HD in this population.

scholarly journals RELATIONSHIP BETWEEN RED BLOOD CELL AND PLATELET INDICES IN IRON DEFICIENCY ANEMIA

2021 ◽  
Vol 71 (2) ◽  
pp. 575-78
Author(s):  
Sahar Rabbani ◽  
Muhammad Farooq ◽  
Samina Naeem ◽  
, Muhammad Abdul Naeem ◽  
Nasir Uddin ◽  
...  
Keyword(s):  
Blood Cell ◽  
Cell Volume ◽  
Red Blood Cell ◽  
Mean Platelet Volume ◽  
Large Cell ◽  
Deficiency Anemia ◽  
Platelet Distribution Width ◽  
Platelet Volume ◽  
Distribution Width ◽  
Cell Ratio

Objective: To find out the correlation between the red blood cell and platelet indices in patients presenting with iron deficiency anemia at a tertiary care hospital of Pakistan. Study Design: Cross-sectional study. Place and Duration of Study: Department of Hematology, Combined Military Hospital Lahore, from Sep 2018 to Mar 2019. Methodology: The patients of age 1-70 years of either gender presenting with IDA were included in the study. The blood sample of patients were sent to laboratory to assess the red blood cell and platelet indices. SPSS-23 was used to analyze data. Results: Two hundred and seven patients fulfilling the inclusion criteria were included in this study. The mean age was 25.6 ±17.8years. Correlation was weak and insignificant between haemoglobin and packed cell volume (r=-0.385**, p<0.01), haemoglobin and mean cell volume (r=-0.225**, p<0.01), packed cell volume and mean cell haemoglobin (r =0.263**, p<0.01), & mean cell haemoglobin and mean platelet volume (r=0.143*, p<0.05). Correlation was moderate and significant between platelet distribution width and mean platelet volume (r=0.511**) & platelet distribution width and platelet large cell ratio (0.502**, p<0.01). Correlation was strong between mean platelet volume and platelet large cell ratio (r=0.759**, p<0.01). Conclusion: In conclusion, there was significant relation between red blood cell and platelets indices in iron deficiency anemia. Furthermore, haemoglobin and packed cell volume are weekly correlated, platelet distribution width and mean platelet volume are moderately correlated and mean platelet volume and platelet large cell ratio are strongly correlated.

Comparison of red blood cell volume distribution curves and phase-contrast microscopy in localization of the origin of hematuria

Urology ◽  
2003 ◽  
Vol 61 (3) ◽  
pp. 507-511 ◽  
Author(s):  
Xavier Gamé ◽  
Michel Soulié ◽  
Anne-Marie Fontanilles ◽  
Jean-Michel Benoit ◽  
J.ol-Xavier Corberand ◽  
...  
Keyword(s):  
Blood Cell ◽  
Cell Volume ◽  
Red Blood Cell ◽  
Phase Contrast ◽  
Volume Distribution ◽  
Phase Contrast Microscopy ◽  
Contrast Microscopy
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