Morrison Shawnda A, Gorjanc Jurij, Eiken Ola, Mekjavic Igor B
Environmental Physiology and Ergonomics Laboratory, Department of Automation, Biocybernetics and Robotics, Jožef Stefan Institute, Ljubljana, Slovenia (Drs Morrison and Mekjavic).
Department of Surgery, Hospital of the Brothers of St. John of God, St.Veit/Glan, Austria (Dr Gorjanc).
Wilderness Environ Med. 2015 Sep;26(3):295-304. doi: 10.1016/j.wem.2014.12.026. Epub 2015 Mar 6.
To assess whether previous freezing cold injuries (FCI) would affect digit skin temperatures and rewarming rates during a follow-up cold stress test protocol.
Nonrandomized control trial.
Twenty elite alpinists participated; alpinists with previous FCI requiring digit amputations (injured, INJ: n = 10 total, n = 8 male) were compared with ability-matched, uninjured alpinists (control, CON: n = 10, all male). Digit skin temperature was measured using infrared thermography as an index of peripheral digit perfusion after a cold stress test, which consisted of 30 minutes of immersion in 8°C water.
The INJ alpinists' injured toes were warmer (approximately 6%) than their uninjured toes immediately after cold immersion (95% CI, 0.01°C to 1.00°C; P = .05); there were no differences between the rates of rewarming of injured and uninjured toes (INJ, 0.5° ± 0.1°C/min; CON, 0.7° ± 0.3°C/min; P = .16). Although the INJ alpinists had colder injured fingers immediately after the 35°C warm bath compared with their own uninjured fingers (32.2° ± 2.0°C vs 34.5° ± 0.5°C; P = .02), there were no differences observed between the rates of rewarming of injured and uninjured fingers after cold exposure (INJ, 1.1° ± 0.2°C/min; CON, 1.3° ± 0.5°C/min; P = .22).
Even after FCI that requires digit amputation, there is no evidence of different tissue rates of rewarming between the injured and uninjured fingers or toes of elite alpinists.
评估既往冻伤是否会在后续冷应激试验方案中影响手指皮肤温度和复温速率。
非随机对照试验。
20名精英登山运动员参与研究；将既往因冻伤而需截肢手指的登山运动员（受伤组，INJ：共10人，8名男性）与能力匹配的未受伤登山运动员（对照组，CON：10人，均为男性）进行比较。在冷应激试验后，使用红外热成像测量手指皮肤温度，以此作为手指外周灌注的指标。冷应激试验包括在8°C水中浸泡30分钟。
受伤组登山运动员的受伤脚趾在冷浸泡后立即比未受伤脚趾更温暖（约6%）（95%置信区间，0.01°C至1.00°C；P = 0.05）；受伤和未受伤脚趾的复温速率没有差异（受伤组，0.5°±0.1°C/分钟；对照组，0.7°±0.3°C/分钟；P = 0.16）。尽管受伤组登山运动员在35°C温水浴后，受伤手指立即比未受伤手指更冷（32.2°±2.0°C对34.5°±0.5°C；P = 0.02），但冷暴露后受伤和未受伤手指的复温速率没有差异（受伤组，1.1°±0.2°C/分钟；对照组，1.3°±0.5°C/分钟；P = 0.22）。
即使是在因冻伤而需截肢手指的情况下，也没有证据表明精英登山运动员受伤和未受伤的手指或脚趾之间的组织复温速率存在差异。
