A negative pressure–based visualization technique for abdominal Veress needle insertion

Purpose Abdominal Veress needle insertion is commonly performed to generate a pneumoperitoneum during laparoscopy. Various safety tests are conducted to confirm accurate needle tip positioning into the abdominal cavity. However, these occasionally yield unclear results and do not help directly visualize the peritoneum puncture. We validated a negative pressure–based technique that helps instantly visualize the moment of the Veress needle entry into the abdominal cavity. Methods This study included 761 patients who underwent laparoscopic hernioplasty between 2003 and 2021 that entailed pneumoperitoneum creation using a Veress needle. They were divided into conventional technique (CON) and negative pressure visualization technique (NPV) groups. The patients were propensity score–matched (1:1) to minimize selection bias. To determine whether the technique gave a clear result to the surgeon and precisely informed the moment of entry, failed entry and emphysematous complications were compared between the groups. Results The propensity score–matching yielded 105 pairs in the matched CON and NPV groups. Failed entry did not occur in the NPV group, whereas it occurred in 8 patients (7.6%) in the CON group ( p = 0.004). No patient experienced extraperitoneal emphysema in the matched NPV group, whereas 7 patients (6.7%) in the CON group did ( p = 0.007). The groups did not differ in the incidence of omental or mesenteric emphysema. Conclusion The NPV eliminated the incidence of failed entry and decreased the incidence of extraperitoneal emphysema, indicating that it could simply and adequately inform the moment of needle entry into the abdominal cavity.