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Comparison of Transcutaneous Electrical Nerve Stimulation and Pulsed Radiofrequency Sympathectomy for Treating Painful Diabetic Neuropathy.

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Comparison of Transcutaneous Electrical Nerve Stimulation and Pulsed Radiofrequency Sympathectomy for Treating Painful Diabetic Neuropathy.

Anesth Pain Med. 2015 Oct;5(5):e29280

Authors: Naderi Nabi B, Sedighinejad A, Haghighi M, Biazar G, Hashemi M, Haddadi S, Fathi A

Abstract
BACKGROUND: Painful diabetic peripheral neuropathy (DPN) is a long-term complication of type 1 and type 2 diabetes that majorly impacts quality of life. Its prevalence increases with age and duration of diabetes. It is more common in patients who have suboptimal glycemic control over several years. Because DPN may be resistant to conventional treatments, it is common for patients to only have partial pain relief. Therefore, new therapeutic options are needed for the condition.
OBJECTIVES: The aim of the present study was to compare the efficacy of transcutaneous electrical nerve stimulation (TENS) and pulsed radiofrequency (PRF) lumbar sympathectomy in treating painful DPN.
PATIENTS AND METHODS: Sixty-five patients with painful DPN refractory to conventional treatment were randomly and evenly assigned to either the TENS or PRF lumbar sympathectomy groups. Pain evaluations were based on the 10-point numerical rating scale (NRS). Subjects were followed for three months and had a total of four study visits (baseline and 1 week, 1 month, and 3 months after treatment).
RESULTS: Sixty patients completed all study visits. In both groups, the NRS rating significantly decreased after treatment, with a marked pain reduction observed at the first follow-up evaluation. In the PRF group, the NRS decreased from 6.46 at baseline to 2.76 at the 1 week visit. One and 3 months after treatment, the NRS was 4.30 and 5.13, respectively (P < 0.0001). In the TENS group, the NRS decreased from 6.10 at baseline to 3.96 at the 1 week visit. One and 3 months after treatment, the NRS was 5.23 and 5.90, respectively (P < 0.0001). Unfortunately, the NRS steady increased almost back to baseline levels in the TENS group. The NRS only slightly increased during the follow-up period in the PRF group, but did not reach baseline levels.
CONCLUSIONS: Both TENS and PRF lumbar sympathectomy are promising pain relief treatments for painful DNP. However, PRF lumbar sympathectomy seems to have a superior efficacy. Further studies with a larger sample size and a longer follow-up period are needed.

PMID: 26587405 [PubMed – as supplied by publisher]

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