１　病例介绍患者，男性，５０岁。因咳嗽、咯痰１月，双下肢疼痛５ｄ第一次入院。患者１月前受凉后出现咳嗽咯痰，左胸隐痛，活动后气促，发热，双下肢无力，当地医院抗感染治疗后咳嗽咳痰减轻，入院前５ｄ出现双下肢水肿，肌肉胀痛，足底触地时呈抽搐样钻心疼痛。即往身体健 1 case presentation patients, male, 50 years old. Due to cough, expectoration in January, the first leg was hospitalized for the first time after 5 days of lower limb pain. The patient developed cough and expectoration after receiving cold for 1 month, left chest pain, after activity, shortness of breath, fever, and weakness of both lower extremities. The local hospital reduced the cough and sputum after anti-infective treatment, and the lower extremities edema, muscle pain and pain occurred 5 days before admission. At the time of touching the ground, it was jerky and painful. Physical health