通常情况下引流管水平内长管内水柱波动的范围是() ["1~2cm","2~3cm","3~4cm","4~6cm","6~8cm"]
气道开始关闭时,肺内的闭合容量是指() ["闭合气量","残气量","功能残气量","闭合气量+残气量","闭合气量+功能残气量"]
男,75岁。便秘10多年,大便5~7天一次,因60小时前突发下腹剧痛住院,痛呈持续性伴阵发性加剧;腹胀明显,无呕吐,病后无肛门排气。检查:T37.5℃,P92次/分,R20次/分,BP24/13.5kPa(180/100mmHg),下腹膨隆,尤以左侧更显著,轻度压痛,无肌紧张,未扪及肿块,肠鸣稀少、音调高亢。直肠指诊:直肠腔较空虚,指套未染血、脓或黏液。钡剂灌肠X线检查见钡剂经直肠近端后即受阻,钡影尖端"鸟嘴"形。肠梗阻手术探查中,下列哪种情况的患者预后最差() ["A.梗阻上段肠管扩张明显","肠浆膜不光滑,毛糙","肠系膜上动脉栓塞","小肠上段梗阻","一组肠袢紧密粘连又无法分离粘连"]
深龋充填后近期出现咬合痛的原因错误的是() ["充填物过高","根尖周炎","对颌牙有不同金属修复体","接触点恢复不良","意外露髓直接充填"]
拔除胸腔闭式引流管时应() ["深吸气后屏气","深呼气后屏气","正常呼吸","浅呼气后屏气","浅吸气后屏气"]
染色质小体现已证实是()卡波环现被认为可能是()