Background: Negative pressure wound therapy (NPWT) is one of the new modality for the treatment of diabetic foot ulcers. In this article we will investigate the efficacy and safety of it by literature search and meta-analysis.
Methods: The databases of PubMed, Embase, Ovid, and Cochrane library were selected as search platforms. Randomized controlled trials (RCTs) published after 2010 were searched with the keyword "vacuum-assisted closure therapy" OR "negative pressure wound therapy" OR "diabetic foot". The Cochrane Review Handbook was used to assess the bias of the literatures. The software RevMan 5.4 was used for analysis to obtain a forest plot and funnel plot.
Results: In this study, 363 articles were initially screened, and 9 literatures were finally included, involving a total of 943 patients. Combined analysis using the fixed effects model showed that the healing rate of the NPWT group was significantly lower than the standard group [odds ratio (OR) =3.60, 95% confidence interval (CI): 2.38 to 5.45, P<0.001]. The granulation tissue formation time of the NPWT group was significantly less than the standard group [mean difference (MD) =-8.95, 95% CI: -10.26 to -7.64, P<0.001]. The rate of adverse events of both groups showed no significant difference (OR =0.49, 95% CI: 0.10 to 2.42, P=0.38). The amputation rate of both groups showed no statistically significant (OR =0.33, 95% CI: 0.09 to 1.26, P=0.10) too.
Discussion: Negative pressure wound therapy can effectively accelerate wound healing, it is equally safe with general routine treatment. However, the negative pressure value should be appropriately maintained and adjusted to avoid bleeding tendency of the wound when applying this new modality.
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