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ORIGINAL ARTICLE
Year : 2019  |  Volume : 13  |  Issue : 1  |  Page : 19-24

The effect of forced-air warmer, ondansetron or their combination on shivering in pregnant women coming for elective cesarean section under spinal anesthesia: A prospective, randomized controlled comparative study


Department of Anaesthesiology, ESIC Medical College and Hospital, Hyderabad, Telangana, India

Correspondence Address:
Kalyani Surya Dhana Lakshmi Sangineni
Department of Anaesthesiology, ESIC Medical College and Hospital, Sanathnagar, Hyderabad - 500 038, Telangana
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0259-1162.252897

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Context: Perioperative shivering can occur in up to 85% of patients undergoing cesarean section under spinal anesthesia. It has many detrimental effects and disrupts early mother-child bonding. Therefore, it should ideally be prevented by either pharmacologic or nonpharmacological means. Aims: The primary aim of this study was to evaluate the efficacy of intraoperative forced-air warming, ondansetron or their combination in preventing perioperative shivering in patients undergoing elective cesarean section under spinal anesthesia. Settings and Design: A prospective randomized controlled comparative study done at the tertiary care center. Subjects and Methods: A total of 120 patients undergoing elective cesarean section under spinal anesthesia were randomly assigned to three groups. Group O received ondansetron 4 mg intravenously (i.v.) after giving block with no forced air warming. Group W received forced-air warming intraoperatively. Group C received ondansetron 4 mg i.v. after giving block plus intraoperative forced-air warming. Core temperature (tympanic membrane) and the arm skin temperature were measured and shivering was graded simultaneously. Statistical Analysis Used: Parametric data were analyzed using one-way ANOVA and Student's paired t-test where ever appropriate. Nonparametric data were analyzed using the Kruskal–Wallis and the Chi-square test. Values of P < 0.05 were considered statistically significant. Results: Shivering incidence was higher in Group O and Group W being 17.5% and 20%, respectively, and least in Group C being 5%. The incidence of Grade ≥3 shivering requiring rescue drug was lower in Group C (2.5%) compared to that of the Groups W (5%) and O (10%) but was not statistically significant (P = 0.21). Conclusions: Combined use of ondansetron and forced- air warmer was more effective in reducing the incidence of shivering in pregnant women during elective cesarean section than when used individually.


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