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.
Background: LMA CTrach™ is a laryngeal mask airway (LMA™) device used for tracheal intubation under vision. A new technique of LMA CTrach ™ insertion was evaluated with respect to number of manoeuvres of airway required to obtain grade 1 or 2 view of glottis when compared to standard recommended insertion technique. Methods: One hundred and ten patients were randomized to either standard technique group (LMA CTrach ™ inserted according to manufacturer's recommendations) or modified technique group (LMA CTrach ™ inserted with the viewer assembled and visualizing the process of insertion). The number of manoeuvres used before successful intubation were compared. Manoeuvres used to get adequate ventilation/good glottic view were the up-down manoeuvre, partial withdrawal, distal maneuver, Chandy manoeuvre and suctioning. Total number of manoeuvres and ease of LMA CTrach ™ insertion were recorded. Results: Patient characteristics were comparable. Among 50 patients in each group 37 patients required 43 manipulations in modified technique group compared to 41 patients who required 65 manipulations in standard technique group before getting a good glottic view (P=0.013). The number of maneuvers required for successful insertion was significantly higher in the standard technique group compared to modified technique group. Modified insertion technique was significantly difficult (23/50 patients) compared to standard technique (6/50 patients); P<0.001. Time required to obtain the best possible glottic view and the incidence of sore throat was significantly lower with modified technique (P<0.001 and 0.046 respectively). Conclusion: Number of manoeuvres for getting good glottic view was significantly less with the modified technique of inserting LMA CTrach ™. However, this technique was perceived to be more difficult.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.