Psychology Department, McGill University, Montreal, QC, Canada.
Ann Behav Med. 2012 Apr;43(2):173-80. doi: 10.1007/s12160-011-9315-8.
Despite the ongoing need for blood donation, few people give blood. A common reason is concern about vasovagal symptoms.
The aim of this study was to evaluate the effectiveness of applied tension in reducing vasovagal symptoms during blood donation and the mechanisms of action.
Two hundred eighty-two young adult blood donors were randomly assigned to conditions involving applied tension during the pre-donation wait period, during the blood draw, both, or no applied tension at all.
Applied tension was effective in reducing vasovagal symptoms in blood donors, particularly when practiced during the pre-donation wait period (p < 0.001). People who practiced applied tension during the pre-donation wait period required less treatment for vasovagal reactions than people who did not (8% vs. 16%).
The results of this study suggest that the effects of applied tension on vasovagal symptoms are not mediated entirely by exercise-related changes in blood pressure and heart rate. Rather, it may reduce anxiety or physiological consequences of anxiety. Applied tension is a useful treatment which can help people cope during blood donation and other invasive medical interventions.
尽管人们对献血的需求持续存在，但很少有人献血。一个常见的原因是担心血管迷走神经性症状。
本研究旨在评估在献血期间应用张力减少血管迷走神经性症状的效果及其作用机制。
282 名年轻成年献血者被随机分配到在献血前等待期间、采血期间、两者都有或根本没有应用张力的条件下。
在献血者中，应用张力可有效减少血管迷走神经性症状，尤其是在献血前等待期间应用时（p<0.001）。在献血前等待期间应用张力的人比没有应用的人需要治疗血管迷走神经性反应的人数更少（8%对 16%）。
这项研究的结果表明，应用张力对血管迷走神经性症状的影响并非完全通过血压和心率的运动相关变化来介导。相反，它可能减轻焦虑或焦虑的生理后果。应用张力是一种有用的治疗方法，可以帮助人们在献血和其他侵入性医疗干预期间应对。
