Abstract: Objective  To analyze deep venous catheterrelated bloodstream infection in patients with malignant tumor for reference in prevention and treatment of the disease. Methods  Retrospective analysis was made in 107 cases of patients with malignant tumor in the hospital from January 2014 to December 2016， including the incidence of deep venous catheterrelated bloodstream infection. Results  In 107 patients  of  deep venous catheter related bloodstream infection，gram positive bacteria were cultured in 46 cases (42.98%)， gram negative bacteria 38 cases (35.51%) and fungi 23 cases (21.51%). The highest infection rate was found in 730 days after catheter indwelling， up to 43.90%. The ways of catheter maintenance of peripherally inserted central catheters (PICC) infection  also showed significant difference. The constituent ratios of two PICC infections from individual clinics or/ external hospitals maintenance and self maintenances were respectively 48.7% and 28.3%. Conclusion  Malignant tumor patients with deep venous catheterrelated bloodstream infection were mainly gram positive bacteria. The highest infection rate was found in 730 days after catheter indwelling. Prevention should be strengthened. Improper maintenance will result in a significant increase in the rate of infection.

Key words: carcinoma, catheterization, bacterial infections