Division of Neuro and Inflammation Sciences, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden.
Department of Emergency Medicine, Local Health Care Services in Central Östergötland, Linköping, Östergötland, Sweden.
J Biophotonics. 2018 Jun;11(6):e201700371. doi: 10.1002/jbio.201700371. Epub 2018 Mar 5.
To describe the effect of low ambient temperature on skin temperature and capillary refill (CR) time in forehead, sternum and finger pulp.
An observational, nonrandomized experimental study on 15 healthy subjects (6 females) in a cold room (8°C). Outcome measures were skin temperature and quantified CR test after application of a standardized blanching pressure (9 N/cm ) using digital photographic polarization spectroscopy to generate CR times.
The finger pulp showed marked temperature fall and prolonged CR times (>10 seconds). The CR registrations of the forehead and sternum were more comparable to curves observed in a control material at room temperature, and skin temperature falls were less marked. CR times were not prolonged in forehead measurements. At the sternum, some individuals showed CR times beyond guideline recommendations despite only a marginal reduction in skin temperature.
Low ambient temperature is a strong independent factor for CR time at peripheral sites. Reservation about sternum as a site of measurement is warranted since cold provocation produced prolonged CR times in some individuals. We found that the forehead is the most thermostable of the 3 sites and thus the preferred site to avoid ambient temperature artifact in measuring CR time.
描述环境低温对额部、胸骨和指腹皮肤温度和毛细血管再充盈（CR）时间的影响。
在冷室（8°C）中对 15 名健康受试者（6 名女性）进行了一项观察性、非随机的实验研究。使用数字摄影偏光光谱学在施加标准化的苍白压力（9 N/cm ）后，对皮肤温度和量化的 CR 试验进行了测量，以产生 CR 时间。
指腹的温度明显下降，CR 时间延长（>10 秒）。额部和胸骨的 CR 记录与室温下的对照材料观察到的曲线更相似，皮肤温度下降不明显。额部测量的 CR 时间没有延长。在胸骨处，尽管皮肤温度仅略有下降，但一些人出现了超过指南推荐的 CR 时间。
环境低温是外周部位 CR 时间的一个强烈独立因素。由于冷刺激在某些个体中产生了延长的 CR 时间，因此对胸骨作为测量部位持保留意见是合理的。我们发现，额头是 3 个部位中最耐热的部位，因此是避免测量 CR 时间时环境温度干扰的首选部位。
