title: Effectiveness of colorectal laparoscopic surgery on patients at high anesthetic risk: an intervention cohort study.
abstract: OBJECTIVE
  The aim of the study was to assess the effectiveness of laparoscopic colorectal surgery in patients at high preoperative anesthetic risk because of associated pathologies.
  
  
  METHODS
  From January 2003 until January 2005, 116 patients were systematically assigned at a ratio of 1:1 to one of two groups: laparoscopy surgery (n=59, of which 31 were American Society of Anesthesiologists score [ASA] I-II [L1] and 28 ASA III-IV [L2]) or open surgery (n=57, of which 30 were ASA I-II [O1] and 27 ASA III-IV [O2]). Data on patient demographics and clinical and anesthetic variables were collected prospectively. Informed consent was obtained from the patients, and approval was obtained from the designated review board of the institution involved.
  
  
  RESULTS
  The number of minor anesthetic complications during surgery was higher in L2 patients. No differences were observed in blood gas parameters studied during surgery (pCO(2), pH, and pO(2)/FiO(2)). Transfusion rates in the laparoscopy group at greater anesthetic risk (L2) were lower than those of the high-risk conventional surgery group (O2; 21.4 vs 63%, P<0.02). Duration of stay in the surgical recovery room and the inpatient ward were also shorter in the L2 group than in the O2 group (8.7+/-4.5 vs 12.2+/-6 days, P=0.02). There was no difference in perioperative clinical variables between laparoscopy groups (L1, L2).
  
  
  CONCLUSIONS
  Postoperative recovery of ASA III-IV patients is better after laparoscopic surgery for colorectal cancer, at the expense of a higher rate of minor anesthetic occurrences during surgery.
authors.affiliation: Department of Gastrointestinal Surgery, University Hospital of Canary Islands, La Laguna, Spain. ivanhuc@hispavista.com
authors.forename: I
authors.initials: I
authors.lastname: Arteaga González
authors.forename: E M
authors.initials: EM
authors.lastname: López-Tomassetti Fernández
authors.forename: Y
authors.initials: Y
authors.lastname: Hernández Piñero
authors.forename: A
authors.initials: A
authors.lastname: Martín Malagón
authors.forename: J
authors.initials: J
authors.lastname: Arranz Durán
authors.forename: S
authors.initials: S
authors.lastname: Bethencourt Muñoz
authors.forename: H
authors.initials: H
authors.lastname: Díaz
authors.forename: A
authors.initials: A
authors.lastname: Carrillo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000768:Anesthesia, General / Q000009:adverse effects*; D015179:Colorectal Neoplasms / Q000601:surgery*; D013505:Digestive System Surgical Procedures / Q000009:adverse effects; D005260:Female; D006801:Humans; D010535:Laparoscopy / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D018579:Patient Selection; D011446:Prospective Studies; D018570:Risk Assessment; D016896:Treatment Outcome