Oxygen affinity of blood in altitude Sherpas

Oxygen equilibrium curves on blood within 6 h from sampling have been estimated from polarographic measurements of oxyhemoglobin concentration, in 13 male 14- to 50-yr old Sherpas residing at 3,850 m above sea level (Kumjung, Nepal). In samples with red blood cell counts = 4.7 +/- 0.8 (SD) x 10(6)/mm3, total hemoglobin concentration [Hb] = 17.0 +/- 1.9 g/dl, and hematocrit = 53.3 +/- 5.0, the mean oxygen half-saturation of hemoglobin (P50) (pH = 7.4 and PCO2 = 40 Torr) was 27.3 +/- 1.8 Torr. The P50 of altitude Sherpas was not significantly different from that of acclimatized lowlanders (28.2 +/- 1.3; n = 7), sea-level Caucasian residents (26.5 +/- 1.0; n = 17), and Sherpas at sea level (27.1; n = 3). The 2,3-diphosphoglyceric acid-to-hemoglobin concentration ratio ([2,3-DPG]/[Hb]) in altitude Sherpas was 1.22 +/- 0.03, the same as that of acclimatized Caucasians (1.22 +/- 0.10). The Bohr effect measured for the blood of one altitude Sherpas by the ratio deltalog P50/deltapH was -0.32 and -0.45 at PCO2 levels of 40 and 20 Torr, respectively. These values are not significantly different from those found in Caucasians at sea level where deltalog P50/deltalpH was -0.35 and -0.42, respectively. It is concluded that the P50 in native highlanders is not significantly different from that observed in sea-level dwellers. [2,3-DPG]/[Hb] at altitude, both in natives and in newcomers, is 20% higher than in sea-level residents.

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Blood Donation in Nigeria: Standard of the Donated Blood

Journal of Laboratory Physicians ◽

10.4103/0974-2727.105589 ◽

2012 ◽

Vol 4 (02) ◽

pp. 094-097 ◽

Cited By ~ 4

Author(s):

Nwogoh Benedict ◽

Awodu Omolade Augustina ◽

Bazuaye Godwin Nosakhare

Keyword(s):

Blood Donation ◽

Hematological Parameters ◽

Hemoglobin Concentration ◽

Mean Corpuscular Hemoglobin ◽

Corpuscular Hemoglobin ◽

Mean Cell Volume ◽

Benin City ◽

Cell Counts ◽

Significant Difference ◽

The Mean

ABSTRACT Objective: The objective was to determine the basic hematological parameters of remunerated blood donors in Benin City and to compare them with those of voluntary donors. Materials and Methods: This is a prospective study conducted in a tertiary health facility in Benin City. Pretransfusion samples were obtained from blood bags after gentle mixing and analyzed for hematological parameters. Samples were analyzed using the hematology autoanalyzer MODEL SYSMEX KN21. Result: A total of 215 samples were obtained comprising 160 remunerated (paid) and 55 voluntary donor samples. In the paid donors, the mean hemoglobin concentration (Hb) and hematocrit (HCT) 7.7±2.9 and 28.8±8.5 respectively. This was significantly lower than those of voluntary donors who had 13.9±1.2 and 42.2±3.3 with P < 0.001. The mean values of the red cell counts (RBC), white cell counts (WBC), mean cell volume (MCV), mean corpuscular hemoglobin (MCH), and mean corpuscular hemoglobin concentration (MCHC) were significantly lower in paid donors as P-values were <0.001. MCV was significantly low but not compared to the other parameters as P=0.04. There was no significant difference in the platelet count. Conclusion: Paid donors in Benin City have significantly lower hematological parameters than controls.

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Optoacoustic monitoring of total hemoglobin concentration: In vitro and in vivo studies

Biomedical Topical Meeting ◽

10.1364/bio.2004.fh4 ◽

2004 ◽

Author(s):

I. Y. Petrova ◽

D. S. Prough ◽

Y. Y. Petrov ◽

H.- P. F. Brecht ◽

C. Svensen ◽

...

Keyword(s):

Hemoglobin Concentration ◽

In Vivo Studies ◽

Total Hemoglobin ◽

Total Hemoglobin Concentration

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Results of routine determination of clinically significant hemoglobin derivatives by multicomponent analysis.

Clinical Chemistry ◽

10.1093/clinchem/32.6.972 ◽

1986 ◽

Vol 32 (6) ◽

pp. 972-978 ◽

Cited By ~ 24

Author(s):

A Zwart ◽

E J van Kampen ◽

W G Zijlstra

Keyword(s):

Pulmonary Disease ◽

Fetal Hemoglobin ◽

Hemoglobin Concentration ◽

Major Surgery ◽

Chemical Laboratory ◽

Total Hemoglobin ◽

Clinically Significant ◽

Blood Specimens ◽

Total Hemoglobin Concentration

Abstract Our recently developed multiwavelength method for multi-component analysis of hemoglobin (Hb) derivatives (Clin Chem 1984;30:373-379) was adapted for routine use in the clinical chemical laboratory. The method was applied in 4066 determinations on blood specimens from patients awaiting major surgery (n = 3863) or visiting the outpatient department for pulmonary disease (n = 203). Mean total hemoglobin concentration was 141 (SD 14) g/L. The proportion of HbCO was slightly to moderately increased (1.5-10.0%) in 36.5% of all patients; in a few cases it was as high as 15%. Mean methemoglobin was 0.4% (SD 0.2%) in the surgical patients, but 1.5% (SD 0.8%) in the patients with pulmonary disease. In some patients of the latter group the proportion of methemoglobin amounted to 5%. Sulfhemoglobin was found less than 0.4% in all specimens. Interference by paraproteins and by increased concentrations of bilirubin and lipids in plasma was easily detected by means of the performance checks provided by the spectrophotometer (an HP 8451 UV/Vis). The method is equally suitable for measuring blood samples containing fetal hemoglobin.

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