Pain Management and Research
Dose-response relationship of ropivacaine for paravertebral nerve block in treating acute severe herpetic neuralgia
Meng Qisheng, Jin Xiaofeng, Fei Yong, Yao Ming
Published 2019-01-20
Cite as Chin J Anesthesiol, 2019,39(1): 59-61. DOI: 10.3760/cma.j.issn.0254-1416.2019.01.015
Abstract
ObjectiveTo determine the dose-response relationship of ropivacaine for paravertebral nerve block in treating acute severe herpetic neuralgia.
MethodsOne hundred patients with herpetic neuralgia, with the course of disease ≤1 month, of numeric rating scale score≥7 points, scheduled for elective paravertebral nerve block with ropivacaine under ultrasound guidance, were divided into 5 groups(n=20 each)using a random number table method: 5 different concentrations of ropivacaine groups(R1-5 groups). The herpes zoster-affected thoracic spinal nerves were identified, and the mixture 5 ml was injected into the paravertebral space corresponding to the spinal nerves. The mixture solution contained ropivacaine with the concentrations of 0.075 0%(group R1), 0.112 5%(group R2), 0.150 0%(group R3), 0.187 5%(group R4)and 0.225 0%(group R5), compound betamethasone 1 ml, and mecobalamin injection 1 ml diluted to 20 ml with normal saline. Effective block was defined as numeric rating scale score≤1 point at 10 min after paravertebral nerve block with ropivacaine. The median effective concentration(EC50), 95% effective concentration(EC95)and 95% confidence interval of ropivacaine for paravertebral nerve block in treating acute severe shingles neuralgia were calculated by Probit analysis.
ResultsThe EC50 and EC95 (95% confidence interval)of ropivacaine for paravertebral nerve block in treating acute severe shingles neuralgia were 0.150 0%(0.097 0%-0.216 0%)and 0.216 0%(0.175 0%-0.541 0%), respectively.
ConclusionThe EC50 and EC95 of ropivacaine for paravertebral nerve block in treating acute severe herpetic neuralgia are 0.150 0% and 0.216 0%, respectively.
Key words:
Amides; Nerve block; Dose-response relationship, drug; Neuralgia, postherpetic
Contributor Information
Meng Qisheng
Department of Pain, Central Hospital of Shaoxing City, Shaoxing 312400, China
Jin Xiaofeng
Department of Pain, Central Hospital of Shaoxing City, Shaoxing 312400, China
Fei Yong
Department of Anesthesiology and Pain Medicine, First Hospital of Jiaxing, Jiaxing 314001, China
Yao Ming
Department of Anesthesiology and Pain Medicine, First Hospital of Jiaxing, Jiaxing 314001, China