Hyperbaric oxygen therapy in the treatment of diabetic foot ulcer has been widely used in medical practice, but its clinical effect is not clear. The purpose of this overview of systematic reviews is to evaluate the clinical evidence of hyperbaric oxygen therapy in the treatment of diabetic foot ulcers.

Methods

PubMed, Cochrane Library, Web of Knowledge, Embase, MEDLINE, Chinese National Knowledge Infrastructure Database, the Chongqing VIP Database, Chinese Biomedical Database, and Wanfang Database were searched in 1st December 2020. Systematic reviews (SRs) evaluating the effects of Hyperbaric oxygen therapy in people with diabetic foot ulcer were included. Methodological quality of the included SRs was assessed using the AMSTAR-2 tool. The quality of evidence of the primary studies was assessed using GRADE. The integrity of the included SRs was assessed using PRISMA. The bias risk of each SR was assessed using ROBIS evaluation tool.

Results

Eleven SRs/MAs met all inclusion criteria. According to the results of the AMSTAR-2, only 1 included review were rated critically as being of high quality, 6 included review were rated critically as being of medium quality. With PRISMA, the reporting checklist was relatively complete, but some reporting weaknesses remained in the topics of the protocol and registration, search strategy, and additional analyses. Based on the ROBIS tool, only five SRs/MAs had a low risk of bias. With the GRADE system, no high-quality evidence was found, and only 13 outcomes provided moderate-quality evidence.

Conclusions

There is limited clinical evidence to support hyperbaric oxygen therapy in the treatment of diabetic foot ulcers, it is not recommended to routinely apply hyperbaric oxygen therapy to all patients with diabetic foot ulcers, especially those with non-ischemic diabetic foot ulcers. Hyperbaric oxygen therapy has certain potential to promote ulcer healing and reduce amputation rate in patients with ischemic diabetic foot ulcers, but due to the low quality and small quantity of the SRs/MAs supporting these results, high-quality studies with rigorous study designs and larger samples are needed before widespread recommendations can be made.

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