A prospective comparative study between prewarming and cowarming to prevent intraoperative hypothermia

Laxmi Shenoy, Handattu Krishna, Nichenametla Kalyan, Kaipu Prasad

Research output: Contribution to journalArticle

Abstract

Background and Aims: Inadvertent perioperative hypothermia defined as the perioperative core temperature of <36°C is a common problem in day-to-day anesthesia practice. It is not clear from the literature whether prewarming, that is, initiation of convective warming of the patient at a time point prior to induction of anesthesia is superior or comparable to cowarming, that is, initiation of convective warming simultaneously with induction of anesthesia. We conducted this study to find whether cowarming is as good as prewarming in preventing the occurrence of intraoperative hypothermia. Material and Methods: Sixty-two adult patients undergoing major abdominal surgery under general anesthesia were randomized to receive either prewarming for 60 min at 40° C or cowarming using the Level 1® Equator ® body warmer. All patients who were prewarmed also received cowarming during induction of anesthesia. In both the groups, convective warming was continued during intraoperative period. Incidence of intraoperative hypothermia, core, and peripheral body temperatures were compared between the two groups. Results: Among 27 patients in each group who completed the study core temperature decreased to <35° C toward the end of surgery in 17 patients in group prewarming [mean (SD) 34.59 (1.17° C)] and 18 patients in group cowarming [mean (SD) 34.31 (1.34° C)]. The incidence of intraoperative hypothermia and the core temperature at the end of surgery were comparable (P = 0.42). Conclusion: Cowarming is as effective as prewarming to prevent intraoperative hypothermia.

Original languageEnglish
Pages (from-to)231-235
Number of pages5
JournalJournal of Anaesthesiology Clinical Pharmacology
Volume35
Issue number2
DOIs
Publication statusPublished - 01-04-2019

Fingerprint

Hypothermia
Prospective Studies
Anesthesia
Temperature
Intraoperative Period
Incidence
Body Temperature
General Anesthesia

All Science Journal Classification (ASJC) codes

  • Pharmacology, Toxicology and Pharmaceutics(all)
  • Pharmacology (medical)
  • Anesthesiology and Pain Medicine

Cite this

@article{4a5a8297495340d7bc1c9a3b6bf4b5d8,
title = "A prospective comparative study between prewarming and cowarming to prevent intraoperative hypothermia",
abstract = "Background and Aims: Inadvertent perioperative hypothermia defined as the perioperative core temperature of <36°C is a common problem in day-to-day anesthesia practice. It is not clear from the literature whether prewarming, that is, initiation of convective warming of the patient at a time point prior to induction of anesthesia is superior or comparable to cowarming, that is, initiation of convective warming simultaneously with induction of anesthesia. We conducted this study to find whether cowarming is as good as prewarming in preventing the occurrence of intraoperative hypothermia. Material and Methods: Sixty-two adult patients undergoing major abdominal surgery under general anesthesia were randomized to receive either prewarming for 60 min at 40° C or cowarming using the Level 1{\circledR} Equator {\circledR} body warmer. All patients who were prewarmed also received cowarming during induction of anesthesia. In both the groups, convective warming was continued during intraoperative period. Incidence of intraoperative hypothermia, core, and peripheral body temperatures were compared between the two groups. Results: Among 27 patients in each group who completed the study core temperature decreased to <35° C toward the end of surgery in 17 patients in group prewarming [mean (SD) 34.59 (1.17° C)] and 18 patients in group cowarming [mean (SD) 34.31 (1.34° C)]. The incidence of intraoperative hypothermia and the core temperature at the end of surgery were comparable (P = 0.42). Conclusion: Cowarming is as effective as prewarming to prevent intraoperative hypothermia.",
author = "Laxmi Shenoy and Handattu Krishna and Nichenametla Kalyan and Kaipu Prasad",
year = "2019",
month = "4",
day = "1",
doi = "10.4103/joacp.JOACP_353_17",
language = "English",
volume = "35",
pages = "231--235",
journal = "Journal of Anaesthesiology Clinical Pharmacology",
issn = "0970-9185",
publisher = "Journal of Anaesthesiology Clinical Pharmacology",
number = "2",

}

A prospective comparative study between prewarming and cowarming to prevent intraoperative hypothermia. / Shenoy, Laxmi; Krishna, Handattu; Kalyan, Nichenametla; Prasad, Kaipu.

In: Journal of Anaesthesiology Clinical Pharmacology, Vol. 35, No. 2, 01.04.2019, p. 231-235.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A prospective comparative study between prewarming and cowarming to prevent intraoperative hypothermia

AU - Shenoy, Laxmi

AU - Krishna, Handattu

AU - Kalyan, Nichenametla

AU - Prasad, Kaipu

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Background and Aims: Inadvertent perioperative hypothermia defined as the perioperative core temperature of <36°C is a common problem in day-to-day anesthesia practice. It is not clear from the literature whether prewarming, that is, initiation of convective warming of the patient at a time point prior to induction of anesthesia is superior or comparable to cowarming, that is, initiation of convective warming simultaneously with induction of anesthesia. We conducted this study to find whether cowarming is as good as prewarming in preventing the occurrence of intraoperative hypothermia. Material and Methods: Sixty-two adult patients undergoing major abdominal surgery under general anesthesia were randomized to receive either prewarming for 60 min at 40° C or cowarming using the Level 1® Equator ® body warmer. All patients who were prewarmed also received cowarming during induction of anesthesia. In both the groups, convective warming was continued during intraoperative period. Incidence of intraoperative hypothermia, core, and peripheral body temperatures were compared between the two groups. Results: Among 27 patients in each group who completed the study core temperature decreased to <35° C toward the end of surgery in 17 patients in group prewarming [mean (SD) 34.59 (1.17° C)] and 18 patients in group cowarming [mean (SD) 34.31 (1.34° C)]. The incidence of intraoperative hypothermia and the core temperature at the end of surgery were comparable (P = 0.42). Conclusion: Cowarming is as effective as prewarming to prevent intraoperative hypothermia.

AB - Background and Aims: Inadvertent perioperative hypothermia defined as the perioperative core temperature of <36°C is a common problem in day-to-day anesthesia practice. It is not clear from the literature whether prewarming, that is, initiation of convective warming of the patient at a time point prior to induction of anesthesia is superior or comparable to cowarming, that is, initiation of convective warming simultaneously with induction of anesthesia. We conducted this study to find whether cowarming is as good as prewarming in preventing the occurrence of intraoperative hypothermia. Material and Methods: Sixty-two adult patients undergoing major abdominal surgery under general anesthesia were randomized to receive either prewarming for 60 min at 40° C or cowarming using the Level 1® Equator ® body warmer. All patients who were prewarmed also received cowarming during induction of anesthesia. In both the groups, convective warming was continued during intraoperative period. Incidence of intraoperative hypothermia, core, and peripheral body temperatures were compared between the two groups. Results: Among 27 patients in each group who completed the study core temperature decreased to <35° C toward the end of surgery in 17 patients in group prewarming [mean (SD) 34.59 (1.17° C)] and 18 patients in group cowarming [mean (SD) 34.31 (1.34° C)]. The incidence of intraoperative hypothermia and the core temperature at the end of surgery were comparable (P = 0.42). Conclusion: Cowarming is as effective as prewarming to prevent intraoperative hypothermia.

UR - http://www.scopus.com/inward/record.url?scp=85068564249&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068564249&partnerID=8YFLogxK

U2 - 10.4103/joacp.JOACP_353_17

DO - 10.4103/joacp.JOACP_353_17

M3 - Article

VL - 35

SP - 231

EP - 235

JO - Journal of Anaesthesiology Clinical Pharmacology

JF - Journal of Anaesthesiology Clinical Pharmacology

SN - 0970-9185

IS - 2

ER -