Background: Single-incision laparoscopic surgery (SILS) is growing in popularity. The increased diameter of the umbilical incision might raise questions about the possibility of a greater risk of postoperative incisional hernia in comparison to conventional laparoscopy. This study aims to disclose the frequency of incisional hernia after SILS in long-term follow-up as well as to reveal the factors predisposing patients to this feared complication.
Methods: The patient collective consists of cholecystectomy and appendectomy patients, who were operated on using SILS technique. Follow-up was achieved through letter correspondence, telephone interview, and clinical examination. Effects of demographic variables and operative parameters including age, sex, BMI, ASA score, duration of surgery, pre-existing hernia as well as postoperative incidence of incisional hernia were investigated using univariate and multivariate analyses.
Results: A total of 286 cases with complete follow-up were included in the analyses. Mean follow-up duration was 58.4 months. 192 patients (67.1%) underwent cholecystectomy; 94 (32.9%) had an appendectomy. The study collective consisted of 218 women (76.2%) and 68 men (23.8%). Mean age at the date of the operation was 38.5 (median 36, range 13-74). In 5 cases (1.7%), the surgical approach was converted into conventional laparoscopy. Intraoperative complication rate was 0.3% and postoperative complication rate was 5.9%. 7 patients (2.4%) developed an incisional hernia. Obese patients had an incisional hernia incidence of 10.9%. 3 out of 19 patients (15.8%) with a pre-existing umbilical hernia developed an incisional hernia during follow-up. Obesity and pre-existing umbilical hernia proved to have a significant association with incisional hernia incidence in univariate and multivariate analyses. Sex, age, procedure (appendectomy vs cholecystectomy), presence of acute inflammation, and duration of surgery did not show a statistically significant association with incisional hernia.
Conclusion: Detection of incisional hernia necessitates a long follow-up duration. Obesity and pre-existing umbilical hernia are associated with a higher incidence of this complication. Following a careful patient selection, SILS offers a safe approach for cholecystectomy and appendectomy procedures.
Keywords: Appendectomy; Cholecystectomy; SILS; Single incision; Single port.