Korean J Anesthesiol Search

CLOSE


Korean Journal of Anesthesiology 2004;47(6):772-778.
DOI: https://doi.org/10.4097/kjae.2004.47.6.772   
Comparison of ETT and LMA on Respiratory Mechanics during the Induction of General Anesthesia in Children.
Soo Chang Son, Young Kwon Ko, Seung Jin Lee
Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon, Korea. scson@cnu.ac.kr
Abstract
BACKGROUND
Laryngeal mask airway (LMA) has recently been introduced as an alternative for the endotracheal tube. The respiratory mechanics and respiratory parameters during positive pressure ventilation (PPV) via the laryngeal mask airway (LMA) are not well known in children. So, we compared the effects of the endotracheal tube and the laryngeal mask airway on respiratory mechanics during the induction of general anesthesia in children.
METHODS
We studied sixty ASA physical status I and II healthy children undergoing general anesthesia. Anesthesia was induced with sleep dose ketamine 1.0 mg/kg i.v., supplemented with propofol 2 mg/kg, Rocuronium 1.0 mg/kg i.v and maintained with 50% nitrous oxide and 2.0 Vol% sevoflurane. After inserting the laryngeal mask airway, its cuff was inflated using a balloon cuff gauge until the intracuff pressure reached approximately 60 cmH2O. Adequacy of ventilation was assessed by observing the end tidal carbon dioxide wave form, chest wall movement, and by stethoscope auscultation. Data were collected with lung mechanics recorders (Ventcheck, Novametrix Medical System, U.S.) at 5 and 10 minutes after intubation or LMA insertion. The data included Peak Inspiratory Pressure (PIP), Mean Airway Pressure (MAP), Peak End Expiratory Pressure (PEEP), Inspired Tidal Volume (VTins), Expired Tidal Volume (VTexp), Airway resistance (Raw), and Compliance (Cdyn).
RESULTS
No significant difference was observed between the airway pressures, tidal volumes and gas leak fractions of the ETT and LMA groups. In terms of airway resistance and compliance, significant differences were observed between the two groups at 5 and 10 minutes.
CONCLUSIONS
We conclude that the laryngeal mask airway is superior to endotracheal intubation in terms of airway resistance and compliance. The laryngeal mask airway offer an alternative for the children needing to avoid intubation under general anesthesia.
Key Words: laryngeal mask airway; respiratory mechanics; resistance; compliance


ABOUT
ARTICLE CATEGORY

Browse all articles >

BROWSE ARTICLES
AUTHOR INFORMATION
Editorial Office
101-3503, Lotte Castle President, 109 Mapo-daero, Mapo-gu, Seoul 04146, Korea
Tel: +82-2-792-5128    Fax: +82-2-792-4089    E-mail: journal@anesthesia.or.kr                

Copyright © 2024 by Korean Society of Anesthesiologists.

Developed in M2PI

Close layer
prev next