Anesthesia: Essays and Researches

ORIGINAL ARTICLE
Year
: 2018  |  Volume : 12  |  Issue : 4  |  Page : 786--791

Comparison of two different volumes of ropivacaine used in nerve stimulator guided inter-scalene block for arthroscopic shoulder surgery – A randomized controlled trial


Ghanshyam Kumar Sahu1, Dharam Singh Meena1, Suman Saini1, Ajisha Aravindan1, Priyankar Kumar Datta2 
1 Department of Anaesthesiology, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
2 Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India

Correspondence Address:
Prof. Dharam Singh Meena
Anaesthesia Office, OT Complex, Ground Floor, Safdarjung Hospital, New Delhi - 110 029
India

Background: This study was conducted to compare the analgesic efficacy of 10 ml versus 20 mL of 0.5% ropivacaine in nerve stimulator guided interscalene brachial plexus block, in patients undergoing arthroscopic shoulder surgery. Methods: A total of 70 American Society of Anesthesiologists physical status classes 1 and 2 patients, aged 18–65 years, undergoing unilateral arthroscopic shoulder surgery, were randomized into two groups. Group A received single shot inter-scalene block with 20 mL of 0.5% ropivacaine whereas Group B received the same with 10 mL. The primary outcome was difference in the total postoperative fentanyl consumption over 24 h. Secondary outcomes were difference in block onset, intra-operative hemodynamic parameters, intra-operative fentanyl consumption, duration of effective analgesia, visual analogue scale (VAS) scores at various time intervals, duration of motor block, and incidence of hemidiaphragmatic (HD) palsy. Results: Total 24 h fentanyl consumption was significantly higher in Group B (558 ± 112 mcg) compared to Group A (296 ± 88 μg). Block onset was slower in Group B than Group A. There was no difference in intra-operative fentanyl consumption. Postoperative VAS scores were significantly higher in Group B compared to Group A, at 6 h and thereafter. Duration of motor block was significantly shorter in Group B (6.25 ± 1.25 h) compared to Group A. HD palsy was seen in all the cases in both the groups. Conclusion: Single shot nerve stimulator guided interscalene block with 10 ml of 0.5% ropivacaine was inferior to 20 mL of 0.5% ropivacaine with respect to postoperative analgesic efficacy.


How to cite this article:
Sahu GK, Meena DS, Saini S, Aravindan A, Datta PK. Comparison of two different volumes of ropivacaine used in nerve stimulator guided inter-scalene block for arthroscopic shoulder surgery – A randomized controlled trial.Anesth Essays Res 2018;12:786-791


How to cite this URL:
Sahu GK, Meena DS, Saini S, Aravindan A, Datta PK. Comparison of two different volumes of ropivacaine used in nerve stimulator guided inter-scalene block for arthroscopic shoulder surgery – A randomized controlled trial. Anesth Essays Res [serial online] 2018 [cited 2019 Aug 19 ];12:786-791
Available from: http://www.aeronline.org/article.asp?issn=0259-1162;year=2018;volume=12;issue=4;spage=786;epage=791;aulast=Sahu;type=0