Fundamental study on the reactions of the finger skin temperature to provocation test with cold air

I.Tanaka，N.Inoue等提出了冷空气激发试验，即仅将受试手指暴露于5 ℃的空气中，以评估振动病。冷水浸泡试验常用于诊断手臂振动综合征和雷诺综合征中的雷诺现象。在这项研究中，用冷空气激发试验的有效性进行了研究，作为冷水浸泡试验的替代品。受试者为55名20多岁的健康女性志愿者，无外周循环疾病史。在实验室中，使用激发装置将23摄氏度的女性手指暴露于5摄氏度的空气中20分钟。冷水浸泡试验中的指尖皮温反应参数TFR和TTR可用于冷空气激发试验。在手指局部冷空气冷却过程中，获得了四种反应类型的指尖皮肤温度曲线。大多数情况下，温度下降到一定水平，但此后开始上升。观察到的其他类型包括：温度下降不超过热阻，温度下降后，很少热阻，温度下降，并在手指冷却过程中略有回升。这些冷空气反应类型受食物摄入时间、实验时间、月经周期和季节条件的影响。戴手套时指尖皮肤温度的反应可分为阻力型、边界型和跟随型，而不戴手套时可分为阻力型、边界型和跟随型。这表明戴手套时指尖皮肤温度的反应受到一些附加因素的影响。

The provocation test with cold air in which only tested finger was exposed to 5ﾟC air has been developed by I.Tanaka, N.Inoue et al.for the assessment of vibration disease.Cold water immersion test was commonly used for diagnosing Raynaud phenomenon in hand-arm vibration syndrome and Raynaud syndrome. In this study, the validity of this provocation test with cold air was investigated as a substitute for the cold water immersion test. Subjects were 55 healthy women volunteers in their twenties with no history of peripheral circulation disease. The fingers of women in the laboratory at 23ﾟC were exposed to 5ﾟC air for 20 minutes using the provocation apparatus. Reactive parameters of finger tip skin temperature used in cold water immersion test, such as TFR and TTR,could be applied in a provocation test with cold air. Four reaction types of finger tip skin temperature curves were obtained during fingers local cooling with cold air. Most of the cases showed that the temperature fell at a certain level but thereafter began to rise. The other types observed include : temperature not falling more than the thermal resistance, temperature falling down after few thermal resistance, temperature falling down and re-rising slightly during finger cooling. These reaction types with cold air were affected by the time of food intake, experimental time, menstrual cycle, and seasonal conditions. The reactions of the finger tip skin temperature with glove were classified into resistance type, border type, and follow type, irrespective of the above mentioned four response types without glove. This indicates that the reactions of finger tip skin temperature with gloves were affected by some additional factors.