Department of Physiotherapy, University School of Physical Education in Poznan, Królowej Jadwigi Str. 27/39, 61871 Poznan, Poland.
Rheumatol Int. 2012 Oct;32(10):2987-92. doi: 10.1007/s00296-011-2078-5. Epub 2011 Sep 7.
The aim of the study was the thermovisual comparison of mean temperature of hand surface changes after local cryotherapy with vapors of nitrogen (-160°C) and cold air (-30°C). Forty-seven patients with rheumatoid arthritis (39 women and 8 men; average age 56.2 ± 10.5 years) were included in the study. They had the application of topic cryotherapy using nitrogen vapors or cold air on one hand. Main outcome measure was surface temperature of dorsal sides of the cooled and contralateral hands. Thermal images of both hands were taken before and up to 3 h after the treatment. One minute after application, nitrogen vapors induced decrease in surface skin temperature of the cooled hand from 28.9 ± 1.8°C to 17.9 ± 2.2°C, P < 0.05, whereas cold air from 29.4 ± 2.4°C to 23.1 ± 2.2°C, P < 0.05. However, significantly lower temperature was obtained with vapors of nitrogen (P < 0.05). Just after the treatment, a rapid rewarming occurred and hands reached baseline temperature in 15 min in both applications and they did not differ till the end of the procedure. Both nitrogen vapors and cold air induce similar temperature changes in hands with the exclusion of temperature obtained 1 min after the treatment. Changes in non-cooled hands indicate contralateral reaction.
本研究旨在通过对局部冷冻疗法中手表面平均温度变化的热视觉比较,来比较氮气(-160°C)蒸气和冷空气(-30°C)的效果。共有 47 名类风湿关节炎患者(39 名女性和 8 名男性;平均年龄 56.2±10.5 岁)参与了本研究。他们的一只手接受了氮气蒸气或冷空气的局部冷冻治疗。主要观察指标是冷却手和对侧手背侧的表面温度。在治疗前和治疗后 3 小时内拍摄双手的热图像。应用后 1 分钟,氮气蒸气使冷却手的表面皮肤温度从 28.9±1.8°C 降至 17.9±2.2°C,P<0.05,而冷空气从 29.4±2.4°C 降至 23.1±2.2°C,P<0.05。然而,氮气蒸气的温度明显更低(P<0.05)。治疗后立即发生快速复温,两种应用方式下的手在 15 分钟内均恢复到基线温度,且在整个过程中它们的温度没有差异。氮气蒸气和冷空气对手部的温度变化相似,除了治疗后 1 分钟时获得的温度。未冷却手的变化表明存在对侧反应。