Zbrozyna A, Westwood D
Department of Physiology, Medical School, University of Birmingham, England.
Eur J Appl Physiol Occup Physiol. 1990;61(1-2):106-11. doi: 10.1007/BF00236702.
Forearm and calf blood flow were measured using a mercury-in-silastic gauge during immersion of one foot in water at 4 degrees C. The subjects were asked to assess the level of pain on a scale 0-10. The effects of one session of repeated immersions on the vascular response in the calf, forearm and on subjective pain sensation were studied. In 6 of the 14 subjects vasodilatation was elicited in both forearm and calf during the first immersion. During the first session the vasodilation diminished, while subjective pain sensation remained at the level of 7 on the scale. In 4 subjects vasoconstriction in both calf and forearm occurred during the first immersion. During repeated immersions forearm vasoconstriction subsided, while in the calf it remained at the same level. The level of the subjective pain sensation diminished from 7.5 to 5 in 1 subject. Repeated immersions in six to ten daily sessions led to reduction of vasodilatation in calf and forearm while there was a small change in the pain sensation, i.e. reduction from the level of 6.9 to 5.7 (P less than 0.01). In subjects in whom vasoconstriction in forearm and calf was observed no clear trend in vascular responses was observed during the repeated daily sessions while the pain sensation in 1 subject was reduced from 6 to 4.8. In 3 subjects the change of vascular responses was different in the forearm and calf.(ABSTRACT TRUNCATED AT 250 WORDS)
在将一只脚浸入4摄氏度的水中时，使用硅橡胶汞柱式压力计测量前臂和小腿的血流量。要求受试者在0至10的量表上评估疼痛程度。研究了一组重复浸入对小腿、前臂血管反应以及主观疼痛感的影响。14名受试者中有6名在第一次浸入时前臂和小腿均出现血管扩张。在第一次过程中，血管扩张减弱，而主观疼痛感在量表上仍维持在7级。4名受试者在第一次浸入时小腿和前臂均出现血管收缩。在重复浸入过程中，前臂血管收缩消退，而小腿的血管收缩维持在同一水平。1名受试者的主观疼痛感从7.5降至5。每天进行6至10次重复浸入导致小腿和前臂血管扩张减少，而疼痛感有轻微变化，即从6.9降至5.7（P<0.01）。在前臂和小腿观察到血管收缩的受试者中，在每日重复过程中未观察到血管反应的明显趋势，而1名受试者的疼痛感从6降至4.8。3名受试者前臂和小腿的血管反应变化不同。（摘要截短于250字）
