title: Role of the transumbilical laparoscopic-assisted single-channel, single-port procedure in an interval appendectomy for pediatric mass-forming appendicitis: a preliminary retrospective analysis.
abstract: BACKGROUND
  A transumbilical laparoscopic-assisted single-channel, single-port procedure was introduced during laparoscopic interval appendectomy for mass-forming appendicitis in children. The aim of this study was to evaluate the results of the original laparoscopic interval appendectomy.
  
  
  METHODS
  This study analyzed 31 children who underwent laparoscopic interval appendectomy using a single-channel, single-port procedure. The appendectomy was usually planned 8-12 weeks following initial conservative treatment. The procedure was a single-channel surgery using a 12-mm single port. Both a 5-mm telescope and grasper were inserted simultaneously into the single channel. The grasper held the appendix, and an extracorporeal appendectomy was performed.
  
  
  RESULTS
  Appendectomy was planned for 29 patients, as 2 patients deviated from the protocol. The procedure was successful in 21 patients (72.4%). An accessory port was necessary in eight patients, two of whom successfully underwent laparoscopic surgery; the remaining six were converted to open appendectomy. The average length of surgery was 43 min in the single-channel, single-port procedure. No postoperative complications occurred in any patient.
  
  
  CONCLUSIONS
  The single-channel, single-port procedure was successfully performed in over 70% of the patients. This preliminary retrospective analysis indicates that the procedure is safe and potentially beneficial in children with mass-forming appendicitis who require laparoscopic interval appendectomy.
authors.affiliation: Department of Surgery, Oita Children's Hospital, Oita, Japan; Department of Pediatric Surgery, Saitama Medical University, Iruma, Japan.
authors.forename: Yasuharu
authors.initials: Y
authors.lastname: Ohno
mesh_terms: D000293:Adolescent; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D001062:Appendectomy / Q000379:methods*; D001064:Appendicitis / Q000188:drug therapy / Q000473:pathology / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D061887:Conversion to Open Surgery; D005260:Female; D006801:Humans; D010535:Laparoscopy / Q000379:methods*; D007902:Length of Stay; D008297:Male; D012189:Retrospective Studies; D061665:Time-to-Treatment; D016896:Treatment Outcome; D014472:Umbilicus
chemical_list: D000900:Anti-Bacterial Agents
keywords: Child; laparoscopic interval appendectomy; single port surgery