title: Single-port laparoscopic colorectal surgery shows equivalent or better outcomes to standard laparoscopic surgery: results of a 190-patient, 7-criterion case-match study.
abstract: BACKGROUND
  Single-port (SP) surgery has been characterized as having limited applicability regarding procedure, disease, and patient characteristics. There is a question if SP procedures offer disadvantages or advantages to multiport (MP) colorectal surgery. We hypothesize that SP is equivalent to MP and is a safe alternative in the full spectrum of colorectal disease and procedures.
  
  
  METHODS
  A case-matched analysis of a prospectively maintained database to compare perioperative outcomes in SP versus MP was performed. Criteria included age, gender, BMI, previous abdominal surgery, previous XRT, disease process, and procedure. 95 exact matches for all 7 criteria were found between 159 SP and 1,617 MP cases. Perioperative outcomes, surgical technique, morbidity, mortality, local recurrence, and 5-year survival were analyzed.
  
  
  RESULTS
  There was lower mean EBL in SP but no difference in transfusion requirement. OR time for SP left colectomy was shorter, with a trend to shorter OR times found in all procedures. 99 % SP and 98 % MP had no intra-operative complications. Conversion to open was equivalent (0/1). Mean largest incision was smaller for SP. There were no differences in return of bowel function or length of hospital stay. There were no mortalities. There were no differences in perioperative morbidity, local recurrence, distant metastasis, or overall 5-year survival.
  
  
  CONCLUSIONS
  SP is a safe alternative to MP colorectal surgery across the full array of procedures in equivalent patients. This study demonstrates SP has less blood loss, smaller incisions, is quicker in left colectomy, and tends to be quicker across all procedures. Conversion and morbidity rates are equivalent to MP, without compromise in quality of surgical technique. While proper training is essential, concerns regarding the inability to use SP laparoscopic colorectal surgery safely are unfounded in nearly exactly matched patients. These issues will require further study as SP laparoscopic colorectal surgery is practiced more widely.
authors.affiliation: Marks Colorectal Surgical Associates, Lankenau Institute for Medical Research, Wynnewood, PA, USA, marksj@mlhs.org.
authors.forename: John H
authors.initials: JH
authors.lastname: Marks
authors.forename: Grace A
authors.initials: GA
authors.lastname: Montenegro
authors.forename: Margaret V
authors.initials: MV
authors.lastname: Shields
authors.forename: Joseph L
authors.initials: JL
authors.lastname: Frenkel
authors.forename: Gerald J
authors.initials: GJ
authors.lastname: Marks
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003082:Colectomy / Q000379:methods*; D003108:Colonic Diseases / Q000601:surgery*; D004867:Equipment Design; D005260:Female; D006801:Humans; D010535:Laparoscopy / Q000295:instrumentation*; D007902:Length of Stay / Q000639:trends; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012002:Rectal Diseases / Q000601:surgery*; D012008:Recurrence; D016896:Treatment Outcome; D055815:Young Adult