Related Experiment Video
Updated: Jun 3, 2026

Application of the En Bloc Concept Combined with Anatomic Resection in Laparoscopic Hepatectomy
Published on: March 10, 2023
Umbilical center insertion method for initial trocar placement in pediatric laparoscopic surgery
Tatsuo Nakaoka1, Sadashige Uemura, Tatsuyuki Yoshida
1Department of Pediatric Surgery, Osaka City General Hospital, 2-13-22 Miyakojimahondori, Miyakojima-ku, Osaka 534-0021, Japan. t-nakaoka@hospital.city.osaka.jp
Background:
For laparoscopic surgery in pediatric patients, the initial trocar insertion is usually made employing open laparotomy to avoid injury to the viscera. It is safe but somewhat time-consuming for establishing a pneumoperitoneum, and requires additional sutures for anchoring or preventing air leakage. We devised a new initial trocar insertion technique employing an umbilical center incision to shorten the surgical duration and improve the esthetic appearance.
Patients And Methods:
Four hundred and thirty-one pediatric patients were indicated for this umbilical center insertion method (UCM) at 2 pediatric surgical departments. Patients suspected of having umbilical lesions (except for umbilical hernia) or extensive bowel adhesions were excluded.
Results:
There was no complication associated with UCM. In almost all patients, a pneumoperitoneum was established within 1 minute. The wound was completely within the umbilical ring, and very satisfactory esthetically.
Discussion:
We consider UCM to be a safe and easy procedure, and acceptable method of initial trocar insertion for pediatric laparoscopic surgery.

