Objective The aim of the study reported here was to determine the effect of cryotherapy on the caudal thigh muscles of dogs. We hypothesized that temperature changes would be greatest in superficial tissues and decrease with tissue depth.

Study Design Eight mixed-breed dogs (mean weight 21.2 kg, mean age 3.3 years) were studied. Temperature was measured at the skin surface and at depths of 1.0 and 3.0 cm below the skin using needle thermistor probes that were inserted beneath the site of cold pack application. Treatment consisted of a standard 1.0°C cold pack applied for 20 minutes. Temperature was recorded every minute for the 20 minute cold pack treatment, and for 80 minutes following treatment.

Results Cutaneous temperatures significantly decreased (p < 0.01), with rapid rewarming of the skin following cold pack removal. Tissue cooling was less profound with increasing tissue depths, but was still significant (p < 0.05). There was no significant difference in muscle temperature between haired and clipped limbs.

Conclusion A single application of a cold pack to the caudal thigh muscles of dogs for 20 minutes resulted in significant temperature reduction at all tissue depths (p < 0.05). This decrease persisted for ∼60 minutes. The presence of hair did not have a significant effect on muscle cooling (p > 0.05).

目的 本研究报告的目的是确定冷冻疗法对狗的大腿尾部肌肉的影响。我们假设表面组织的温度变化最大，并随着组织深度的增加而降低。

研究设计 研究了 八只混种犬（平均体重 21.2 公斤，平均年龄 3.3 岁）。使用插入冷敷部位下方的针状热敏电阻探头在皮肤表面和皮肤下 1.0 和 3.0 厘米的深度测量温度。处理包括使用标准的 1.0°C 冷敷袋 20 分钟。对于 20 分钟的冷敷处理和处理后的 80 分钟，每分钟记录一次温度。

结果 皮肤温度显着降低 ( p  < 0.01)，去除冷敷袋后皮肤迅速回暖。随着组织深度的增加，组织冷却不太明显，但仍然显着（p  < 0.05）。有毛发和修剪过的四肢之间的肌肉温度没有显着差异。

结论 对狗的大腿尾部肌肉单次使用冷敷袋 20 分钟可显着降低所有组织深度的温度 ( p  < 0.05)。这种下降持续了约 60 分钟。毛发的存在对肌肉冷却没有显着影响（p  > 0.05）。