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血管迷走神经反应发生在2％-3％的献血者中,其中0.08％-0.34％导致昏厥。因为献血者在倒下的过程中可能受伤,有时会造成严重的外伤,包括撕裂、脑震荡和少数的骨折,所以突发的昏厥具有重要的临床意义。在二战期间就曾对血管迷走神经反应做过专门研究,那时已经开始大规模的采血活动,近年来也曾对特殊的情况和普通的献血者做过一些研究。研究表明,年轻人、低体重者、首次献血者和有过此反应的人发生血管迷走神
Vasovagal reactions occur in 2% to 3% of donors, with 0.08% to 0.34% causing syncope. Sudden fainting is of important clinical significance because blood donors may be injured during the fall and sometimes cause severe trauma, including tearing, concussion and a few fractures. During the Second World War had on the vagal reaction has done a special study, when large-scale blood collection activities have begun, in recent years have also done for some special cases and ordinary blood donors. Studies have shown that young people, people with low birth weight, first-time blood donors, and people who have had this reaction develop vasovagal