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Titolo:
EFFECT OF 20 DAYS BED REST UPON PERIPHERAL CAPILLARY FILTRATION-RATE,VENOUS COMPLIANCE AND BLOOD-FLOW IN ARMS AND LEGS
Autore:
BONDEPETERSEN F; SUZUKI Y; KAWAKUBO K; GUNJI A;
Indirizzi:
ESA,EUROPEAN ASTRONAUTS CTR,MED SUPPORT SECT COLOGNE GERMANY UNIV TOKYO,FAC MED,DEPT HLTH ADM TOKYO 113 JAPAN
Titolo Testata:
Acta Physiologica Scandinavica
, volume: 150, anno: 1994, supplemento:, 616
pagine: 65 - 69
SICI:
0001-6772(1994)150:<65:EO2DBR>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANGIOTENSIN;
Keywords:
ARM BLOOD FLOW; BED REST; CAPILLARY FILTRATION RATE; INACTIVITY; LEG BLOOD FLOW; PERIPHERAL CIRCULATION; PLETHYSMOGRAPHY; VENOUS COMPLIANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
9
Recensione:
Indirizzi per estratti:
Citazione:
F. Bondepetersen et al., "EFFECT OF 20 DAYS BED REST UPON PERIPHERAL CAPILLARY FILTRATION-RATE,VENOUS COMPLIANCE AND BLOOD-FLOW IN ARMS AND LEGS", Acta Physiologica Scandinavica, 150, 1994, pp. 65-69

Abstract

Capillary filtration rate, venous compliance and blood flow in arms and legs were measured during bed rest by strain gauge plethysmography using a liquid metal alloy in silastic tubes. Furthermore orthostatic tolerance to lower body suction was recorded. Six young healthy males and three young healthy females participated in the 20 days bed rest study. Neither arm nor leg blood flow was changed by bed rest. Arm blood flow varied between 2.18+/-0.30 and 3.03+/-0.35 vol%.min-1 and leg blood flow between 1.42+/-0.12 and 1.76+/-0.40 vol%.min-1. The capillary filtration rate tended to decrease in the arms from 0.27+/-0.07 vol%.min-1 at day 0 to 0.17+/-0.03 vol%.min-1 at day 3 and a tendency to an increase in filtration rate in the legs from 0.16+/-0.06 at day 0 to0.56+/-0.21 vol%.min-1 at day 3 but both of these changes had recovered from day 10 on. There was a steady state in venous compliance of the forearm between 1.31+/-0.20 and 1.50+/-1.13 vol% during the first two weeks of the bed rest period but the values tended to increase to 1.75+/-0.16 and 1.89+/-0.22 vol% at days 16 and 19, respectively, while leg venous compliance showed a transient tendency to increase at day 3(from 0.83+/-0.08 at day 0 to 1.30+/-0.32 vol% at day 3) to attain control values from day 5. Orthostatic intolerance measured during lowerbody suction decreased in the present subjects. This has been described before after bed rest. However, the present results did not indicate that the vascular bed of the legs contributed hereto. Previous results published showed that the hepatosplanchnic area might play a more significant role. An interesting finding was that the capillary filtration rate of the legs increased transiently in the beginning of the 20 days bed rest period (days 3-5) and the same seemed to be the case forthe arms at the end of the period (day 16). This might indicate that the unloading of gravitational forces has a sudden effect in the lowerextremities while adjustments take longer in the upper extremities.

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Documento generato il 28/09/20 alle ore 05:43:34