Article

Single-dose dexamethasone reduces dynamic pain after total hip arthroplasty.

Department of Anesthesia, Sir Mortimer B Davis-Jewish General Hospital, McGill University, Montreal, Canada.
Anesthesia and analgesia (impact factor: 3.08). 04/2008; 106(4):1253-7, table of contents. DOI:10.1213/ANE.0b013e318164f319 pp.1253-7, table of contents
Source: PubMed

ABSTRACT Preoperative glucocorticoids reduce postoperative nausea but may also improve analgesia and decrease opioid consumption.
Fifty consecutive patients undergoing elective, unilateral, primary total hip arthroplasty under spinal anesthesia with propofol sedation received in a randomized, double-blind, placebo-controlled manner either 40 mg of dexamethasone or saline placebo i.v. before the start of surgery. I.v. patient-controlled analgesia morphine, ibuprofen 400 mg p.o. q6 h and acetaminophen 650 mg p.o. q6 h were given for 48 h. Pain (0-10 numeric rating scale, NRS) at rest, side effects, and total cumulative patient-controlled analgesia morphine consumption were recorded q4 h for 48 h. Dynamic pain NRS score was recorded at 24 h. C-reactive protein levels were measured in a subgroup of 25 patients at 48 h.
The intraoperative sedation requirement with propofol was significantly increased in the dexamethasone group (234.6 +/- 160.1 vs 138.8 +/- 122.7 mg, P = 0.02). Dynamic pain was greatly reduced in the dexamethasone group (NRS score: 2.7, 95% CI: 2.2-3.1 vs 6.8, 6.4-7.2; P < 0.0001). There was no significant effect on pain at rest or cumulative morphine consumption at any time. C-reactive protein levels at 48 h were markedly reduced by dexamethasone (52.4 mg/mL, 28.2-76.6 vs 194.2, 168.9-219.4; P < 0.0001). Seven patients in the control group, but only one in the dexamethasone group, were treated for nausea (P = 0.05).
A single, preoperative i.v. dose of dexamethasone 40 mg has a prolonged suppressive effect on the inflammatory response and decreases dynamic pain 24 h after total hip arthroplasty.

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Keywords

0-10 numeric rating scale
 
24 h. C-reactive protein levels
 
25 patients
 
48 h. Dynamic pain NRS score
 
acetaminophen 650 mg p.o. q6 h
 
C-reactive protein levels
 
consecutive patients undergoing elective
 
cumulative morphine consumption
 
decrease opioid consumption
 
decreases dynamic pain 24 h
 
dexamethasone 40 mg
 
dexamethasone group
 
I.v. patient-controlled analgesia morphine
 
inflammatory response
 
preoperative i.v. dose
 
primary total hip arthroplasty
 
saline placebo i.v
 
spinal anesthesia
 
total cumulative patient-controlled analgesia morphine consumption
 
total hip arthroplasty