title: Single-incision laparoscopic surgery in a survival animal model using a transabdominal magnetic anchoring system.
abstract: BACKGROUND
  Though single-incision laparoscopic surgery (SILS) can reduce operative scarring and facilitates postoperative recovery, it does have some limitations, such as reduction in instrument working, difficulty in triangulation, and collision of instruments. To overcome these limitations, development of new instruments is needed. The aim of this study is to evaluate the feasibility and safety of a magnetic anchoring system in performing SILS ileocecectomy.
  
  
  METHODS
  Experiments were performed in a living dog model. Five dogs (26.3-29.2 kg) underwent ileocecectomy using a multichannel single port (OCTO port; Darim, Seoul, Korea). The port was inserted at the umbilicus and maintained a CO(2) pneumoperitoneum. Two magnet-fixated vascular clips were attached to the colon using an endoclip applicator, and it was held together across the abdominal wall by using an external handheld magnet. The cecum was then retracted in an upward direction by moving the external handheld magnet, and the mesocolon was dissected with Ultracision(®). Extracorporeal functional end-to-end anastomosis was done using a linear stapler. All animals survived during the observational period of 2 weeks, and then re-exploration was performed under general anesthesia for evaluation of intra-abdominal healing and complications.
  
  
  RESULTS
  Mean operation time was 70 min (range 55-100 min), with each subsequent case taking less time. The magnetic anchoring system was effective in achieving adequate exposure in all cases. All animals survived and convalesced normally without evidence of clinical complication during the observation period. At re-exploration, all anastomoses were completely healed and there were no complications such as abscess, bleeding or organ injury.
  
  
  CONCLUSIONS
  SILS ileocecectomy using a magnetic anchoring system was safe and effective in a dog model. The development of magnetic anchoring systems may be beneficial for overcoming the limitations of SILS.
authors: Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Korea.
authors: Yong Beom
authors: YB
authors: Cho
authors: Chan Ho
authors: CH
authors: Park
authors: Hee Cheol
authors: HC
authors: Kim
authors: Seong Hyeon
authors: SH
authors: Yun
authors: Woo Yong
authors: WY
authors: Lee
authors: Ho-Kyung
authors: HK
authors: Chun
mesh_terms: D000818:Animals; D003082:Colectomy / Q000295:instrumentation / Q000379:methods*; D004195:Disease Models, Animal; D004285:Dogs; D004867:Equipment Design; D005240:Feasibility Studies; D010535:Laparoscopy / Q000295:instrumentation / Q000379:methods*; D008280:Magnetics; D011183:Postoperative Complications / Q000209:etiology; D012086:Reoperation; D013525:Surgical Instruments