Medical Gas Research

RESEARCH ARTICLE
Year
: 2019  |  Volume : 9  |  Issue : 2  |  Page : 55--61

Effect of different doses of intrathecal dexmedetomidine on hemodynamic parameters and block characteristics after ropivacaine spinal anesthesia in lower-limb orthopedic surgery: a randomized clinical trial


Laleh Farokhmehr1, Hesameddin Modir2, Bijan Yazdi2, Alireza Kamali2, Amir Almasi-Hashiani3 
1 Student Research Committee, Arak University of Medical Sciences, Arak, Iran
2 Departments of Anesthesiology and Critical Care, Arak University of Medical Sciences, Arak, Iran
3 Department of Epidemiology, School of Health; Traditional and Complementary Medicine Research Center (TCMRC), Arak University of Medical Sciences, Arak, Iran

Correspondence Address:
Hesameddin Modir
Departments of Anesthesiology and Critical Care, Arak University of Medical Sciences, Arak
Iran

The study aims to compare the efficacy of different doses of intrathecal dexmedetomidine on hemodynamic parameters and block characteristics after ropivacaine spinal anesthesia in lower-limb orthopedic surgery. In a double-blind trial, 90 patients undergoing spinal anesthesia for lower-limb orthopedic surgery were included and then randomly assigned to three groups; dexmedetomidine 5 μg/kg, dexmedetomidine 10 μg/kg and placebo. Blood pressure, heart rate, and oxygen saturation were recorded in the three groups at the first 15 minutes and then every 15 to 180 minutes at recovery by a resident anesthesiologist, as well as sensory-motor block onset. The visual analog scale scores for the assessment of pain were recorded at recovery, and 2, 4, 6, and 12 hours postoperatively and the data were analyzed by Stata software. The onset and time to achieve sensory block to ≥ T8 were faster in the 10 μg/kg dexmedetomidine group than the other groups (P = 0.001). The Bromage score was higher in the 10 μg/kg dexmedetomidine group (P = 0.0001) with lower pain score as compared with the 5 μg/kg dexmedetomidine and placebo groups (P = 0.0001). Therefore, an increase in dexmedetomidine hastens the onset of sensory-motor block but not causes side effects. This study was approved by the Ethical Committee of Arak University of Medical Sciences in 2017 (Ethical Code: IR.ARAKMU.REC.1396.37), and the trail was registered and approved by the Iranian Registry of Clinical Trials in 2017 (IRCT No. IRCT2017070614056N12).


How to cite this article:
Farokhmehr L, Modir H, Yazdi B, Kamali A, Almasi-Hashiani A. Effect of different doses of intrathecal dexmedetomidine on hemodynamic parameters and block characteristics after ropivacaine spinal anesthesia in lower-limb orthopedic surgery: a randomized clinical trial.Med Gas Res 2019;9:55-61


How to cite this URL:
Farokhmehr L, Modir H, Yazdi B, Kamali A, Almasi-Hashiani A. Effect of different doses of intrathecal dexmedetomidine on hemodynamic parameters and block characteristics after ropivacaine spinal anesthesia in lower-limb orthopedic surgery: a randomized clinical trial. Med Gas Res [serial online] 2019 [cited 2019 Jul 21 ];9:55-61
Available from: http://www.medgasres.com/article.asp?issn=2045-9912;year=2019;volume=9;issue=2;spage=55;epage=61;aulast=Farokhmehr;type=0