THE EFFECT OF POSTURE CHANGE ON BLOOD-VOLUME, SERUM POTASSIUM AND WHOLE-BODY ELECTRICAL-IMPEDANCE

被引:41
作者
SHIRREFFS, SM
MAUGHAN, RJ
机构
[1] Department of Environmental and Occupational Medicine, University Medical School, Foresterhill, AB9 2ZD, Aberdeen
来源
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY | 1994年 / 69卷 / 05期
关键词
POSTURE; SERUM POTASSIUM; BLOOD VOLUME; BIOELECTRICAL IMPEDANCE ANALYSIS;
D O I
10.1007/BF00865413
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
After standing for 1h, ten subjects (7 male, 3 female) assumed a supine position for a further hour. Whole body bioelectrical impedance increased progressively during the hour spent in the supine position: after 60 min supine the increase was 13(6 to 32)Omega. Blood and plasma volumes, estimated from haematocrit and haemoglobin concentration, increased by 8.0(6.7 to 12.4)% and 16.7(12.3 to 20.8)% (median(range)) respectively after 60 min supine. Serum potassium concentration had fallen after 10 min supine (4.1(0.1)mmol l(-1); mean(SEM)) relative to the standing value (4.6(0.1)mmol l(-1)) and was unchanged thereafter. Serum osmolality (P=0.991) and sodium (P=1.000) and chloride (P=0.998) concentrations remained unchanged throughout the study. The fall in serum potassium concentration in the supine position does not appear to be a simple dilutional effect consequent upon increases in blood and plasma volume as there was no effect of postural change on serum sodium or chloride concentrations.
引用
收藏
页码:461 / 463
页数:3
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