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J. Clin. Med. 2019, 8(1), 51; https://doi.org/10.3390/jcm8010051

Correlation of Perfusion Index Change and Analgesic Efficacy in Transforaminal Block for Lumbosacral Radicular Pain

1
Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Seoul 06351, Korea
2
Department of Anesthesiology and Pain Medicine, Daejeon St. Mary’s hospital, College of Medicine, The Catholic University of Korea, Seoul 34943, Korea
3
Department of Anesthesiology and Pain Medicine, Seoul St. Mary’s hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
*
Author to whom correspondence should be addressed.
Received: 22 November 2018 / Revised: 1 January 2019 / Accepted: 3 January 2019 / Published: 7 January 2019
(This article belongs to the Section Anesthesiology)
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Abstract

Transforaminal epidural injection is used to treat radicular pain. However, there is no objective method of assessing pain relief following transforaminal injection. Perfusion index is a metric for monitoring peripheral perfusion status. This study evaluates the correlation between perfusion index change and analgesic efficacy in transforaminal blocks for lumbosacral radicular pain. We retrospectively analyzed data of 100 patients receiving transforaminal block for lumbosacral radicular pain. We assessed perfusion index before treatment and at 5, 15, and 30 min following the block. We defined responders (group R) and non-responders (group N) as those with ≥50% and <50% pain reduction, respectively, 30 min following block. Clinical data and perfusion index of the groups were analyzed. Ninety-two patients were examined, of whom 57 (61.9%) and 35 (38.0%) patients reported ≥50% and <50% pain reduction, respectively. Group R had a significantly higher perfusion index change ratio 5 min following the block (p = 0.029). A perfusion index change ratio of ≥0.27 was observed in group R (sensitivity, 75.4%; specificity, 51.4%; AUC (area under the curve), 0.636; p = 0.032). A perfusion index change ratio of ≥0.27 at 5 min after block is associated with, but does not predict improvement in, pain levels following lumbosacral transforaminal block. View Full-Text
Keywords: change ratio; perfusion index; radicular pain; transforaminal block change ratio; perfusion index; radicular pain; transforaminal block
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MDPI and ACS Style

Lee, J.Y.; Kim, E.D.; Kim, Y.N.; Kim, J.S.; Sim, W.S.; Lee, H.J.; Park, H.J.; Park, H.J. Correlation of Perfusion Index Change and Analgesic Efficacy in Transforaminal Block for Lumbosacral Radicular Pain. J. Clin. Med. 2019, 8, 51.

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