| Esophageal Motility during General Anesthesia Laryngeal Mask Airway Versus Endotracheal Tube. |
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Yong Yong, Soo Kyung Park, Young Pyo Cheong, Jeong Hun Kim, Hyang Yee Kim, Tai Yo Kim, Jae Seung Yoon |
1Department of Anesthesiology, Wonkwang University School of Medicine, Iksan, Korea. ypcheong@wonkwang.ac.kr
2Department of Anesthesiology, Ajou University School of Medicine, Suwon, Korea. |
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| Abstract |
BACKGROUND
To know whether the laryngeal mask airway (LMA) triggers a pharyngo-esophago- gastric reflex during general anesthesia, we compared the esophageal motility of patients with an LMA or endotracheal tube (ETT) in place.
METHODS
Fifty patients (ASA I or II) scheduled for elective orthopedic surgery with general anesthesia were randomly allocated into LMA (n = 30) or ETT (n = 20) groups.
The esophageal manometric inputs were recorded continuously using an ambulatory esophageal manometric recorder and divided into five perioperative phases (preanaesthesia, induction, operation, LMA or ETT rejection, and arousal phase).
RESULTS
The peristaltic percent and number of contractions per minute were significantly decreased during induction, operation, LMA or ETT rejection and arousal phases compared with preanesthetic phases in both the LMA and ETT groups.
However, there were no significant group differences in any corresponding perioperative phases.
CONCLUSIONS
We suggest that during general anesthesia the use of a LMA does not provoke significantly different esophageal peristalsis compared with an ETT. Thus, the LMA is unlikely to potentiate gastric regurgitation and reflux during general anesthesia by stimulating the pharyngo-esophago-gastric reflex. |
| Key Words:
Esophageal motility; endotracheal tube; laryngeal mask airway |
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