This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a colleague Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Lee, J.-R. Articles by Kim, H.-S. Search for Related Content PubMed PubMed Citation Articles by Lee, J.-R. Articles by Kim, H.-S. Related Collections Airway Pediatrics Pharmacology

---

PEDIATRIC ANESTHESIOLOGY

A Comparison of the End-Tidal Sevoflurane Concentration for Removal of the Laryngeal Mask Airway and Laryngeal Tube in Anesthetized Children

From the Department of Anesthesiology, Seoul National University College of Medicine, Seoul, Korea.

Address correspondence and reprint requests to Hee-Soo Kim, MD, PhD, Department of Anesthesiology, Seoul National University College of Medicine, Seoul, Korea, # 28 Yongondong, Jongrogu, Seoul, Korea. Address e-mail to dami0605{at}snu.ac.kr.

Abstract

BACKGROUND: In this study we quantified and compared the optimal sevoflurane concentration required to prevent coughing or moving during or after removal of the laryngeal mask airway (LMA) and the laryngeal tube (LT) in anesthetized children.

METHODS: Forty unpremedicated children, aged 8 mo to 12 yr, were randomly allocated to receive the LMA or LT. General anesthesia was induced via mask with sevoflurane and the LMA or LT was inserted. Anesthesia was maintained with sevoflurane and oxygen. At the end of surgery, a predetermined end-tidal sevoflurane concentration was maintained for at least 10 min and the LMA or LT was removed. Using Dixon’s up-down method, the concentration for LMA and LT removal was determined by adjusting the dose by a 0.2% increment. Success was defined by the absence of coughing, teeth clenching, gross purposeful movement, breath holding, laryngospasm, and desaturation.

RESULTS: The end-tidal concentration of sevoflurane to achieve successful LMA removal in 50% of children was 1.90%, in 95% of children was 2.15%. For the LT, the concentrations were 1.83% and 2.00%. The 50% effective dose values did not differ significantly between groups.

CONCLUSIONS: LMA and LT removal in 95% of anesthetized children (aged 8 mo to 12 yr) can be safely accomplished without coughing, moving, or any other airway complications at 0.86 and 0.80 minimum alveolar anesthetic concentration, respectively, and a similar concentration should be used for removal of the LT or LMA in children.

This article has been cited by other articles:

				A. Tyagi Sequential Allocation Method Anesth. Analg., January 1, 2009; 108(1): 379 - 379. [Full Text] [PDF]