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Abstract Title:

Effect of Perioperative Vitamin C Supplementation on Postoperative Pain and the Incidence of Chronic Regional Pain Syndrome: A Systematic Review and Meta-Analysis.

Abstract Source:

Clin J Pain. 2016 Feb ;32(2):179-85. PMID: 25654537

Abstract Author(s):

Suzan Chen, Darren M Roffey, Charles-Antoine Dion, Abdullah Arab, Eugene K Wai

Article Affiliation:

Suzan Chen

Abstract:

OBJECTIVES: Postoperative pain can contribute to increased risk for complications and lengthened hospital stays. The objective was to analyze the effects of perioperative vitamin C supplementation on postoperative pain and the development of complex regional pain syndrome I (CRPS I) in patients undergoing surgical procedures.

MATERIALS AND METHODS: A systematic review of published literature was performed through April 2014. References from relevant studies were scanned for additional studies. Results were screened for relevance independently, and full-text studies were assessed for eligibility. Reporting quality was assessed using a modified Newcastle-Ottawa Scale.

RESULTS: The search strategy yielded 710 studies, of which 13 were included: 7 on postoperative pain and 6 on CRPS I. In the final analysis, 1 relevant study found a reduction in postoperative morphine utilization after preoperative vitamin C consumption, whereas another showed no difference in postoperative pain outcomes between the vitamin C and control groups. A meta-analysis of 3 applicable CRPS I studies showed a decrease in postoperative CRPS I after perioperative vitamin C supplementation (relative risk=2.25;τ²=0).

DISCUSSION: There is moderate-level evidence supporting the use of a 2 g preoperative dose of vitamin C as an adjunct for reducing postoperative morphine consumption, and high-level evidence supporting perioperative vitamin C supplementation of 1 g/d for 50 days for CRPS I prevention after extremity surgery. Additional studies are necessary to increase the level of evidence to determine the overall effectiveness and optimum dosage of vitamin C.

Study Type : Meta Analysis

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Sayer Ji
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