To summarize the nursing of a diabetic patient with gas-forming retroperitoneal abscess and invasive hypervirulent Klebsiella pneumoniae syndrome. Key points of nursing：rescue of ketoacidosis complicated with septic shock；observation and nursing of gas-forming retroperitoneal abscess；nursing of subcutaneous emphysema and cellulitis；stepwise nutritional support and blood glucose management；rehabilitation nursing of ICU-acquired weakness；precaution against pulmonary embolism. After treatment and nursing，the patient’s condition improved after 68 days of hospitalization，and was transferred to a rehabilitation hospital. The patient was reexamined and recovered well 1 month after discharge.

This article summarizes the experience in the identification and treatment of 44 cases of patients with initial superior vena cava malposition occurred during peripherally inserted central catheter （PICC） line catheteriza-tion. The 1 370 patients with PICC catheterization in a tertiary hospital in Hangzhou from January to May 2020,among which 44 cases developed initial superior vena cava malposition with the occurrence rate of 3.2%. We were able to reposition in 43 cases through treatment guided by the B-scan ultrasonography and comprehensive analysis of the shape and amplitude of the P wave in intracavitary electrocardiogram. We observed in 1 case that the catheter was mistakenly delivered malposition to Azygos vein. The success rate is 97.7%.

To summarize the nursing care of a patient with coronary heart disease complicated by hepatic artery pseudoaneurysm after hepatopancreatduodenectomy. Nursing points include：to strengthen the observation and nursing care of the disease,to be alert to the occurrence of acute coronary syndrome,to pay attention to early warning sentinel bleeding,to implement nursing care during conservative treatment of hepatic artery pseudoaneurysm,and the prevention and nursing care of complications after interventional treatment. After careful treatment and nursing care,the patient recovered after 78 days of hospitalization.