对低镁血症1例分析如下。1病历摘要男,72岁。主因间断反复呕吐3 a加重3 d入院,呕吐物为胃内容物,伴消瘦、乏力,偶有双上肢间断抽搐,无肢体活动不利及意识障碍,无双眼上吊、牙关紧咬及大小便失禁,无发热寒战。既往十二指肠溃疡史30 a余,十余年前曾行消化道穿孔修补术,3 a前因呕吐入院诊断幽门梗阻。查体:消瘦,腹软,肝脾未触诊,剑下可闻及气过水声,肠鸣音弱,双下肢无水肿。 1 case of hypomagnesemia analysis is as follows. 1 medical summary male, 72 years old. Mainly due to intermittent vomiting repeated 3 a 3 d hospitalization, vomit for the stomach contents, with weight loss, fatigue, occasional double upper limbs intermittent convulsions, no physical activity and disturbance of consciousness, no binocular hanged, teeth clenching and incontinence, No fever chills. Past history of duodenal ulcers more than 30 a, more than ten years ago had perforation repair digestive tract, 3 days before vomiting diagnosis of pyloric obstruction. Physical examination: weight loss, abdominal soft, liver and spleen not palpable, the sword can be heard under the sound of water, bowel sounds weak, no lower extremity edema.