Objective:To make up a portable,economic drainage device to prevent the development of pocket hematoma and avoid the additional therapies of pocket hematoma.Methods:Between 2003 and 2006,a total of 265 devices were implanted at our institution.The 89 high-risk patients were determined by the predictors of hematoma occurrence(marasmatic elder,inevitable oral antiplatelet/anticoagulation therapy,venous pressure increased by other comorbidity,the deficiency of the clotting mechanism for hepatic diseases,or incognizable severe intraoperative bleeding),and other 186 patients were included in non-high-risk group.The 89 high-risk patients were randomized into treatment and control subgroups by sortition.Surgical procedures differed only by the application of the portable,economic drainage device prior to wound closure in treatment subgroup.Results:The incidence of pocket hematoma was 4.3% in treatment subgroup,18.6% in control subgroup and 2.7% in non-high-risk group,leading to 2,6 and 3 patients’ prolonged hospitalization,respectively.The additional cost due to pocket hematoma was lower(1.5 times) in the treatment group compared to the control group.There wasn’t antidromic infection and delayed cure of the skin incision with the use of our drainage device within 6 months.Conclusion:Our portable drainage device was made up easily and quickly.It could decrease the total cost of hospitalization,did not increase the other adverse events and seemed to be suitable for such patients with a tendency to develop pocket hematoma undergoing the implantation of pectoral pacemakers,implantable cardioverter defibrillator,or cardiac resynchronization therapy. Objective: To make up a portable, economic drainage device to prevent the development of pocket hematoma and avoid the additional therapies of pocket hematoma. Methods: Between 2003 and 2006, a total of 265 devices were implanted at our institution. patients were determined by the predictors of hematoma occurrence (malasmatic elder, inevitable oral antiplatelet / anticoagulation therapy, venous pressure increased by other comorbidity, the deficiency of the clotting mechanism for hepatic diseases, or incognizable severe intraoperative bleeding), and other 186 patients were included in non-high-risk group. The 89 high-risk patients were randomized into treatment and control subgroups by sortition. Surgical procedures differed only by the application of the portable, economic drainage device prior to wound closure in treatment subgroup. Results: The incidence of pocket hematoma was 4.3% in treatment subgroup, 18.6% in control subgroup and 2.7% in non-high-risk group, leading to 2,6 and 3 pati ents’ prolonged hospitalization, respectively. the additional cost due to pocket hematoma was lower (1.5 times) in the treatment group compared to the control group. where was not antidromic infection and delayed cure of the skin incision with the use of our drainage device within 6 months.Conclusion: Our portable drainage device was made up easily and quickly. It could decrease the total cost of hospitalization, did not increase the other adverse events and seemed to be suitable for such patients with a tendency to develop pocket hematoma undergoing the implantation of pectoral pacemakers, implantable cardioverter defibrillator, or cardiac resynchronization therapy.