肌肉发僵时，皮肤的供血量就会减少。
The blood supply to the skin is reduced when muscles stiffen.
术中松止血带止血能减少隐性失血量（P＜0.05）；
The hidden blood loss of male was significantly higher than that of female (P < 0.05).
术中松止血带止血能减少隐性失血量（P＜0.05）；
The hidden blood loss of male was significantly higher than that of female (P < 0.05).
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