Clinical Application of Negative Pressure Drainage Vessel and Negative Pressure Drainage of Injector:Risk Factors for Infection

OBJECTIVE To study the risk factors of the infection in the patients with soft tissue expander postoperatively,such as negative pressure drainage vessel and drop stitch.METHODS Totally 17 case of consecutive patients who underwent the soft tissue expander involving at least two sites and set negative pressure drainage tube were studied.For each patient with drainages at two sites,one was negative pressure drainage vessel,the other was drop stitch.The sample were taken from the skin out of the drainage tube,the drainage tube out of skin and the end of drainage after 2,4,6 days of the operation and at the time of removing the tube.Total sample were tested for bacteriology.RESULTS The sample were divided into two groups with 51 cases of specimens for bacterial culture in each group.The positive rates were 2.94% and 1.76%,respectively.The isolation rate of the bacteria from the incision of drainage catheter in 4 d group was 9.09%,and all of the detection rates in 6 d group were 33.33% The positive rate of the pathogens was closely related to the 3 different sampling time(P0.05).CONCLUSION At the early stage of post-operation period,drop stitch is much easier to cause the infection.With overlong cluration of negative pressure drainage,both the negative pressure drainage vessel and the drop stitch are easier to cause infection.