항공우주기술 (Aerospace Engineering and Technology)

한국항공우주연구원 (Korea Aerospace Research Institute)
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다양한 찬물 온도에서 손가락 추위유발성혈관확장의 재생산 반응

Cold-induced Vasodilation At Various Water Temperature And Its Reproducibility During Cold Water Finger Immersion

  • 투고 : 2009.12.21
  • 심사 : 2010.07.01
  • 발행 : 2010.07.01
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초록

본 연구는 다양한 찬물 온도에 손가락을 침수시켰을 경우 추위유발성혈관확장(Cold-induced vasodilation)이 어떻게 나타나며, 이 반응이 재발현되는지 평가하는데 목적을 두었다. 이를 위해 10명의 건강한 대학생($21.4{\pm}2.5$ yrs, $175.8{\pm}4.1$ cm, $69.6{\pm}7.6$ kg, $11.2{\pm}3.7$ %fat)이 두 번의 실험에 참가하였다. 첫 번째 실험은 상온환경에서 다섯 번의 실험과정 반복으로 이루어졌다. 실험과정은 $43^{\circ}C$의 물에 오른손 가운데 손가락을 5분 동안 담갔다가, 그 후 25분 동안 상온에서 휴식을 가지고, 그 다음 무작위로 물 온도 5, 8, 11, 14, 또는 $17^{\circ}C$ 중 하나에 손가락을 담갔다. 한 과정이 끝나면 다른 수온에서 같은 방식으로 실험이 진행되었다. 재발현 반응을 평가하기 위해 첫 실험 후 최소 5일 후에 같은 방법으로 두 번째 실험이 진행되었다. 실험 중 심박수, 직장온도, 손톱주위온도가 매 6초마다 측정되었다. 결론적으로 재현성에는 최대손가락온도(Tfmax)와 Tfmax-물온도(Tw)에서 재생산 반응을 보였다. 추위자극에 따른 CIVD의 반응은 추위자극이 높을수록 최소손가락온도(Tfmin)와 Tfmax의 반응은 높게 나타났으며, 추위자극이 낮을수록 Tfdiff의 반응은 증가되었다. 그러나 모든 반응시간에는 유의한 차이는 보이지 않았다.

This study examined the effect of cold water finger immersion at various water temperature on cold-induced vasodilation (CIVD) and its reproducibility to the cold stress. Ten healthy collegiate men ($21.4{\pm}2.5$ yrs, $175.8{\pm}4.1$ cm, $69.6{\pm}7.6$ kg, $11.2{\pm}3.7$ %fat) underwent two tests. At the first test (1ST), subjects immersed their middle fingers at $43^{\circ}C$ water for 5 min followed by a resting at an ambient air for 25 min. Then they immersed the finger at one of the five water temperatures (Tw: 5, 8, 11, 14, or $17^{\circ}C$) at random order for 20 min. Once a testing at one Tw was completed, they immediately repeated the testing procedure for another Tw. The second test(2ND) was performed within a week after 1ST with having an identical procedure of 1ST except the order of Tw. During the test, rectal temperature, finger temperature from middle finger nail bed, and heart rate were measured every six second. In conclusion, maximal finger temperature(Tfmax), and Tfmax minus Tw was highly reproducible in this experiment. Minimal finger temperature (Tfmin) and Tfmax were higher as Tw decreased. And Tfdiff was higher as the colds tress decreased. No differences were found in time variables of temperature responses.

키워드

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