title: Preoperative pregabalin administration significantly reduces postoperative opioid consumption and mechanical hyperalgesia after transperitoneal nephrectomy.
abstract: BACKGROUND
  Preoperative administration of pregabalin is proposed as a promising way of enhancing postoperative pain control. Whereas a few studies have investigated the effect of pregabalin on postoperative opioid consumption, no study has focused on the influence on postoperative hyperalgesia. In this randomized, triple-blinded, placebo-controlled study, we aimed to demonstrate that a single, preoperative dose of pregabalin reduces postoperative opioid consumption, mechanical hyperalgesia, and pain sensitivity.
  
  
  METHODS
  Patients undergoing elective transperitoneal nephrectomy received 300 mg pregabalin or placebo 1 h before anaesthesia. After operation, patients received piritramide via a patient-controlled analgesia device. Pain levels and side-effects were documented. The area of hyperalgesia for punctuate mechanical stimuli around the incision was measured 48 h after the operation with a hand-held von Frey filament. Mechanical pain threshold was tested before and 48 h after surgery with von Frey filaments with increasing diameters.
  
  
  RESULTS
  In each group, 13 patients were recruited. Total piritramide consumption [77 (16) vs 52 (16) mg, P=0.0004] and the normalized area of hyperalgesia [143 (87) vs 84 (54) cm(2), P=0.0497] were significantly decreased in the pregabalin group. There were no significant differences in mechanical pain threshold levels [1.20 (0.56) log(g) vs 1.05 (0.58) log(g), P=0.6738]. No case of severe sedation was reported in both groups. No other side-effects were observed.
  
  
  CONCLUSIONS
  Our study has shown that preoperative administration of 300 mg pregabalin in patients undergoing transperitoneal nephrectomy reduces postoperative opioid consumption and decreases the area of mechanical hyperalgesia.
authors.affiliation: Department of Anaesthesiology and Intensive Care Medicine, Medical University of Graz, Auenbruggerplatz 29, A-8036 Graz, Austria.
authors.forename: H
authors.initials: H
authors.lastname: Bornemann-Cimenti
authors.forename: A J
authors.initials: AJ
authors.lastname: Lederer
authors.forename: M
authors.initials: M
authors.lastname: Wejbora
authors.forename: K
authors.initials: K
authors.lastname: Michaeli
authors.forename: C
authors.initials: C
authors.lastname: Kern-Pirsch
authors.forename: S
authors.initials: S
authors.lastname: Archan
authors.forename: G
authors.initials: G
authors.lastname: Rumpold-Seitlinger
authors.forename: R
authors.initials: R
authors.lastname: Zigeuner
authors.forename: A
authors.initials: A
authors.lastname: Sandner-Kiesling
mesh_terms: D000328:Adult; D000368:Aged; D018712:Analgesics, Non-Narcotic / Q000008:administration & dosage* / Q000627:therapeutic use; D000701:Analgesics, Opioid / Q000008:administration & dosage*; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006930:Hyperalgesia / Q000209:etiology / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D009392:Nephrectomy / Q000009:adverse effects* / Q000379:methods; D010147:Pain Measurement / Q000379:methods; D017288:Pain Threshold / Q000187:drug effects; D010149:Postoperative Pain / Q000517:prevention & control; D011229:Preanesthetic Medication / Q000379:methods; D000069583:Pregabalin; D005680:gamma-Aminobutyric Acid / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use
chemical_list: D018712:Analgesics, Non-Narcotic; D000701:Analgesics, Opioid; D000069583:Pregabalin; D005680:gamma-Aminobutyric Acid