title: Single-port transumbilical laparoscopic cholecystectomy: a preliminary study in 37 patients with gallbladder disease.
abstract: BACKGROUND
  Since the introduction of laparoscopic surgery, surgeons have not only been concerned about clinical outcomes, but also surgical scars. Although natural orifice transluminal endoscopic surgery (NOTES) is promising, it is not applicable to clinical practice thus far due to safety concerns. As a transitional procedure between standard laparoscopic surgery and NOTES, single-port transumbilical laparoscopic surgery might be an ideal alternative. The main advantage of single-port transumbilical laparoscopic surgery is that it is performed with existing instruments. Thus, we applied single-port surgery for cholecystectomies and the clinical outcomes were analyzed.
  
  
  METHODS
  Between July and October 2008, 37 adults with gallbladder pathologies were enrolled in this study. Only one transumbilical incision was made for accessing the abdominal cavity and a multichannel port system was assembled with existing devices. Standard laparoscopic instruments were used to perform the cholecystectomy.
  
  
  RESULTS
  There were 13 males and 24 females. The mean age of the patients was 47.5 +/- 12.2 years. Twenty-nine patients had gallbladder stones, 7 patients had gallbladder polyps, and 1 patient had biliary dyskinesia. The mean operative time was 83.6 +/- 40.2 minutes. Gallbladder perforations occurred in 11 patients. In 5 patients, the procedure was converted to a standard laparoscopic technique due to technical difficulties. Complications occurred in 2 patients; specifically, a mesenteric injury was caused by the inadvertent grasping of the small-bowel mesentery during the removal of the wound retractor and an inadvertent injury of the right hepatic duct. The mean hospital stay was 2.7 +/- 1.5 days.
  
  
  CONCLUSIONS
  Our series has demonstrated the feasibility and safety of single-port transumbilical laparoscopic cholecystectomy. When technical difficulties arise, early conversion to a standard laparoscopic technique is advised to avoid serious complications. Additional studies randomizing standard laparoscopic cholecystectomy and single-port transumbilical cholecystectomy are necessary for defining the exact role of this procedure.
authors.affiliation: Department of Surgery, Division of Liver Transplantation and Hepatobiliopancreatic Surgery, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.
authors.forename: Sang
authors.initials: S
authors.lastname: Kuon Lee
authors.forename: Young Kyoung
authors.initials: YK
authors.lastname: You
authors.forename: Jung Hyun
authors.initials: JH
authors.lastname: Park
authors.forename: Hyung-Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Kyung Keun
authors.initials: KK
authors.lastname: Lee
authors.forename: Dong Goo
authors.initials: DG
authors.lastname: Kim
mesh_terms: D000328:Adult; D017081:Cholecystectomy, Laparoscopic / Q000009:adverse effects / Q000379:methods*; D002921:Cicatrix / Q000209:etiology / Q000473:pathology / Q000517:prevention & control; D015331:Cohort Studies; D005240:Feasibility Studies; D005260:Female; D005705:Gallbladder Diseases / Q000150:complications / Q000473:pathology / Q000601:surgery*; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D014472:Umbilicus