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Korean J Anesthesiol > Volume 43(6); 2002 > Article
Korean Journal of Anesthesiology 2002;43(6):723-727.
DOI: https://doi.org/10.4097/kjae.2002.43.6.723   
Comparison between High Flow and Low Flow Anesthesia for Positive Pressure Ventilation in Pediatrics Using the Laryngeal Mask Airway.
Hyun Jeong Kwak, Pil Jae Lim, Soo Chang Son, Young Hwan Park, Myoung Ok Kim
1Department of Anesthesiology, National Medical Center, Seoul, Korea. kmoak@medigate.net
2Department of Anesthesiology, College of Medicine, Chungnam National University, Daejon, Korea.
3Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea.
4Department of Anesthesiology, National Health Insurance Corporation Ilsan Hospital, Ilsan, Korea.
Abstract
BACKGROUND
Low flow anesthesia provides many advantages, including reduced cost, conservation of body heat and airway humidity. This study was performed to compare low flow anesthesia with high flow anesthesia and to investigate whether the advantages of low flow anesthesia during positive pressure ventilation can be combined with the laryngeal mask airway in paralyzed pediatric patients.
METHODS
Thirty-one pediatric patients of ASA physical status 1 or 2 were studied and divided into two groups according to the fresh gas flow (FGF) in the breathing system; low flow group (FGF approximation 1 L/min, n = 17) or high flow group (FGF approximation 4 L/min, n = 14). Each respiratory parameter was measured when a steady state was reached at 20 min after induction.
RESULTS
There were no significant differences of respiratory data between the two groups except that the inspired oxygen concentration was lower in the low flow group than in the high flow group. Hemodynamic changes with the laryngeal mask airway insertion were not statistically significant.
CONCLUSIONS
A laryngeal mask airway is an effective airway device for low flow anesthesia as well as for high flow anesthesia in paralyzed pediatric patients.
Key Words: Laryngeal mask; low flow anesthesia; pediatrics
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