背景:当被动悬浮个体四肢的静脉血池时,会出现悬浮综合征(SS),导致视前症状和潜在的无意识或死亡,而与其他伤害无关。我们调查了使用抬腿来延迟SS的发作,因为它可以减少静脉汇集,增加心脏回流和全身灌注。
方法:将参与者悬挂在室内攀岩壁中的攀岩背带中,悬挂在悬挂腿的控制位置或抬高腿的介入位置,以比较组间的生理结果。参与者被暂停最多45分钟。出现2种或更多SS症状,比如眩晕,头昏眼花,或者恶心,立即暂停。我们记录了每个参与者的心率,血压,氧饱和度,小腿血氧饱和度,疼痛等级,晕厥前的分数是暂停前的,中悬,和暂停后,以及总暂停时间。
结果:有24名参与者。两组之间的总暂停时间存在显着差异(43.05±6.7分钟vs33.35±9.02分钟,p=0.007)。总体上,两组之间的心率存在显着差异(p=0.012),在群体之间,特别是在暂停时间间隔(80±11bpmvs100±17bpm,p=0.003)。疼痛等级在组间有显著差异(p=0.05)。血压的差异,氧饱和度,小腿血氧饱和度,和晕厥前评分不显著。
结论:抬腿延长了个体耐受被动悬吊和延迟症状发作的时间。
Suspension syndrome (SS) develops when venous blood pools in extremities of passively suspended individuals, resulting in presyncopal symptoms and potential unconsciousness or death independent of additional injuries. We investigated use of leg raising to delay onset of SS, as it can decrease venous pooling and increase cardiac return and systemic perfusion.
Participants were suspended in rock climbing harnesses at an indoor climbing wall in a legs-dangling control position or a legs-raised interventional position to compare physiological outcomes between groups. Participants were suspended for a maximum of 45 min. Onset of 2 or more symptoms of SS, such as vertigo, lightheadedness, or nausea, halted suspension immediately. We recorded each participant\'s heart rate, blood pressure, oxygen saturation, lower leg oxygen saturation, pain rating, and
presyncope scores presuspension, midsuspension, and postsuspension, as well as total time suspended.
There were 24 participants. There was a significant difference in total time suspended between groups (43.05±6.7 min vs 33.35±9.02 min, p=0.007). There was a significant difference in heart rate between groups overall (p=0.012), and between groups, specifically at the midsuspension time interval (80±11 bpm vs 100±17 bpm, p=0.003). Pain rating was significantly different between groups (p=0.05). Differences in blood pressure, oxygen saturation, lower leg oxygen saturation, and
presyncope scores were not significant.
Leg raising lengthened the time individuals tolerated passive suspension and delayed symptom onset.