title: Evaluation of anastomotic microcirculation after low anterior rectal resection: an experimental study with different reconstruction forms in dogs.
abstract: BACKGROUND
  Data on anastomotic microcirculation of coloanal anastomoses are contradictory. Therefore, it was the aim of the present study to investigate perianastomotic blood perfusion in a standardized experimental setting comparing three forms of reconstruction using laser fluorescence videography, a new method for the evaluation of microcirculation.
  
  
  METHODS
  After a standardised rectal resection in dogs, reconstruction was performed as straight end-to-end (n = 6), side-to-end (n = 6), or J-pouch (n = 6) coloanal anastomosis. Bowel perfusion was evaluated using IC-View laser fluorescence videography.
  
  
  RESULTS
  The perfusion index was significantly reduced in all three groups compared to the reference regions: endto-end anastomosis, median, 93% (range, 63%-136%); side-to-end-anastomosis, 65% (35%-138%); colonic-J-pouch anal anastomosis, 52% (32%-72%); p < 0.001).
  
  
  CONCLUSIONS
  Straight coloanal anastomoses provide better anastomotic microcirculation after rectal resections than colonic-J-pouch anal anastomoses or side-to-end anastomoses. However this effect does not seem to be decisive for the prevention of anastomotic leaks.
authors.affiliation: Department of Surgery, RWTH Aachen, Aachen, Germany. swillis@ukaachen.de
authors.forename: S
authors.initials: S
authors.lastname: Willis
authors.forename: F
authors.initials: F
authors.lastname: Hölzl
authors.forename: C J
authors.initials: CJ
authors.lastname: Krones
authors.forename: A
authors.initials: A
authors.lastname: Tittel
authors.forename: V
authors.initials: V
authors.lastname: Schumpelick
mesh_terms: D000714:Anastomosis, Surgical / Q000379:methods*; D000818:Animals; D003082:Colectomy; D004285:Dogs; D008833:Microcirculation; D011184:Postoperative Period; D019651:Plastic Surgery Procedures; D012007:Rectum / Q000098:blood supply* / Q000601:surgery*; D017792:Surgical Stapling; D014741:Video Recording / Q000379:methods