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The comparison of two different volumes of 0.5% ropivacaine in ultrasound-guided supraclavicular brachial plexus block onset and duration of analgesia for upper limb surgery: A randomized controlled study
Mamta Chadha, Saibal Si, Devika Bhatt, Sushil Krishnan, Rakesh Kumar, Ashok Bansal, Anil Kumar Sharma
Department of Anesthesia, Northern Railway Central Hospital, New Delhi, India
Correspondence Address:
Devika Bhatt,
1st Floor, Department of Anesthesia, Northern Railway Central Hospital, Basant Lane, New Delhi - 110 055
India
 Source of Support: None, Conflict of Interest: None DOI: 10.4103/aer.AER_4_20
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Background: The study is based on the fact that a lower volume of local anesthetic drugs for ultrasound-guided supraclavicular brachial plexus block is useful for upper limb surgeries lasting for a shorter duration, and result in a lower incidence of complications. Aim: The aim of this study is to compare the effectiveness of 35 mL of 0.5% ropivacaine with 20 mL of 0.5% ropivacaine in ultrasound-guided supraclavicular brachial plexus block for upper limb surgery. Setting: Patients undergoing upper limb surgery in an industry-based government hospital in New Delhi, India. Patients were followed in the operation theater and the recovery room. Design: The study design involves a prospective, double-blind, randomized controlled trial. Materials and Methods: A total of 40 participants were recruited for this study. Twenty participants in each group (referred to as group 20 and 30) received 20 mL and 35 mL of 0.5% ropivacaine, respectively, in ultrasound-guided supraclavicular brachial plexus block. Statistical Analysis: The statistical analysis was performed using the software SPSS version 15 and a value of P < 0.05% was considered statistically significant. The statistical tests used included Student's t-test to compare values between the two groups for the mean of parametric data, Mann–Whitney U-test for a median of nonparametric data, and Chi-square test or Fisher's exact test for the categorical data. Results: The sensory and motor block onset in group 20 was 18.06 ± 3.04 and 23.89 ± 2.14 min, respectively. The sensory and motor block onset in group 30 was 17 ± 2.01 and 23.75 ± 2.22 min, respectively. The duration of analgesia in group 20 and 30 was 575.56 ± 104.39 and 730.75 ± 102.09 min, respectively (P < 0.001). Conclusion: The onset of sensory and motor block of 20 mL of 0.5% ropivacaine is comparable to 35 mL of 0.5% ropivacaine for supraclavicular brachial plexus block for upper limb surgery. There was a 21% decrease in the duration of analgesia with a decrease in volume of 0.5% ropivacaine from 35 mL to 20 mL. |
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