巩膜环扎术勿过分缩短环扎带,通常环扎嵴高()。
腰椎穿刺的绝对禁忌症是() ["高血压","心脏病","脑疝形成","癫痫","贫血"]
烧伤应激性溃疡最常见的症状是() ["胃肠道出血","休克","疼痛","穿孔","腹胀"]
出现病理反射是() ["锥体束损害","神经系统兴奋性增高","脑干网状结构损害","脊髓反射弧损害","纹状体病变"]
烧伤休克期微血管变化经过() ["微血管收缩到痉挛到扩张","微血管痉挛到扩张到痉挛","微血管麻痹到扩张到痉挛","微血管痉挛到扩张到麻痹","微血管痉挛到变性到扩张"]
视网膜裂孔冷凝术时冷凝点数量取决于裂孔的大小,但冷凝范围应能包括()。