背景与目的：PACU是由于人体受寒冷刺激后迅速出现红斑、风团伴瘙痒等表现的一类特殊类型的荨麻疹。
Backgrand and Aims PACU is a specific type of urticaria which characterized by the rapid onset of pruritus, erythema, and swelling after a cold stimulus.
根据患者的瘙痒程度、风团数量及大小等进行临床疗效评价。
Their clinical effects were evaluated according to itch degree, numbers and sizes of urticaria.
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