Application of self-made subcutaneous continuous irrigating drainage tube sucked by negative pressure in abdominal incision infection: A double center randomized controlled study

Objective To explore the value of continuous flushing and negative pressure suction with self-made subcutaneous drainage tube in the prevention of type abdominal incision infection. Methods From January 2012 to January 2017 in the Department of General Surgery of the First People’s Hospital of Foshan and People’s Hospital of Jiashi County, two hundred and twenty patients with type Ⅳ incision undergoing laparotomy were randomly divided into the trial group and the control group. A subcutaneous drainage tube was placed and continuous flushing and negative pressure suction were used for three days after the operation in the trial group. The traditional method without placing the subcutaneous drainage tube was adopted in the control group. The perioperative clinical data and the condition of wound recovery were observed and compared. Results The average hospitalization time, treatment costs and total treatment costs of the trial group were significantly lower than those of the control group (P<0.01). There was no significant difference in bacterial culture results between the two groups (χ2=0.017, P=0.992). The wound healing degree of the trial group was significantly better than that of the control group (χ2=8.208, P=0.017), and the incidence of wound infection was significantly lower (χ2=8.206, P=0.004). Multivariate analysis showed that subcutaneous drainage (P=0.008), location of primary disease (P=0.004), preoperative procalcitonin level (P=0.008) and diabetes mellitus (P=0.006) were risk factors for postoperative wound infection. Conclusion Self-made subcutaneous continuous irrigating drainage tube sucked by negative pressure in type incision can effectively prevent postoperative wound infection, reduce hospitalization timeand hospitalization costs. Key words: Drainage; Wound infection; Negative-pressure wound therapy; Abdominal wound closure techniques