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• Use “ “ for phrases o [ “pediatric abdominal pain” ] • Use – to remove results with certain terms o [ “abdominal pain” –pediatric ] • Use OR to account for alternate terms o [teenager OR adolescent ]
鼻胃插管术是将一根可弯曲的细塑料管经鼻或口腔插至胃(鼻胃管)或小肠十二指肠(鼻十二指肠管)。插管通常会引起呕吐和恶心,因此插管前需用局麻药喷洒鼻腔或者咽后壁。
此操作可用于多种目的,例如
取胃或肠内容物样本
持续清除胃中内容物
提供食物
帮助医生经皮肤将饲管准确且直接置入胃或肠中