Open AccessComparison of vital capacity rapid inhalation and tidal ventilation induction with sevoflurane in adults: a prospective cohort study
Author(s) -
Renjith Viswanath,
Raghavan Pulickal,
Joe John Chirayath,
Kesavan Mullapilly
Publication year - 2021
Publication title -
medical gas research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 24
ISSN - 2045-9912
DOI - 10.4103/2045-9912.314328
Subject(s) - anesthesia , medicine , sevoflurane , inhalation , ventilation (architecture) , minimum alveolar concentration , hemodynamics , prospective cohort study , surgery , mechanical engineering , engineering
Vital capacity rapid inhalation induction (VCRII) results in faster achievement of desired minimum alveolar concentration while reducing the incidence of excitatory phenomenon compared to conventional incremental technique. This study aimed to determine whether the VCRII can achieve faster induction of anesthesia in adults compared to the traditional tidal ventilation (TV) technique. Following the approval from the Institutional Ethics Committee, Amala Institute of Medical Sciences, with an approval No. AIMSIEC/07/2017, on July 1, 2017, 51 adults belonging to American Society of Anesthesiologists physical status I-II, undergoing elective surgery at a tertiary care teaching hospital were prospectively assigned to two groups: 25 in VCRII (38.3 ± 13.3 years old, 20 (80%) females) and 26 in TV inhalation induction (35.2 ± 11.9 years old, 17 (65%) females) using 8% sevoflurane in 66% nitrous oxide. The induction time, such as time (in seconds) to the cessation of voluntary finger tapping, time to loss of eyelash reflex, time to return of regular breathing, the return of conjugate gaze, was measured. The primary outcome was time to induction as defined by time to loss of eyelash reflex. Hemodynamic effects of both methods were compared at baseline and 1, 3, 5, 10, 15-minute intervals from induction. Induction was significantly faster in the VCRII group compared with the TV group in all the measured parameters. Hemodynamic parameters were comparable in both the groups. VCRII resulted in a faster induction time compared to the TV technique in adults.