Document Detail

The incidence of gastroesophageal reflux with the laryngeal mask: a comparison with the face mask using esophageal lumen pH electrodes.
MedLine Citation:
PMID:  7726443     Owner:  NLM     Status:  MEDLINE    
To test the hypothesis that the laryngeal mask airway (LMA) predisposes patients to gastroesophageal reflux, we randomly assigned 55 patients having elective surgery to receive standardized anesthesia with the LMA or with conventional face mask (FM) plus airway. A pH-sensitive probe with two electrodes, 10 cm apart, was passed nasally into the esophagus 1 h before induction of anesthesia, and recordings were made continuously until 30 min after surgery. At the distal electrode, 30 cm from the anterior nares, there was a significant difference in the incidence of reflux: 53.6% with the LMA versus 22.2% with the FM (P < 0.05). At the level of the proximal electrode, 20 cm from the anterior nares, there was no difference between groups. Multiple reflux events, defined as two or more reflux events before, during, or after anesthesia, were significantly more frequent in the LMA group (P < 0.05). Reflux events continued in the postanesthesia care unit (PACU) in both groups with no significant difference between groups. There was no clinical evidence of aspiration of gastric contents in either group. Use of the LMA appears to result in increased reflux to the level of the mid to upper esophagus, and is associated with a more frequent incidence of multiple reflux events than use of the FM.
T M Owens; P Robertson; C Twomey; M Doyle; N McDonald; A J McShane
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Anesthesia and analgesia     Volume:  80     ISSN:  0003-2999     ISO Abbreviation:  Anesth. Analg.     Publication Date:  1995 May 
Date Detail:
Created Date:  1995-05-23     Completed Date:  1995-05-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  1310650     Medline TA:  Anesth Analg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  980-4     Citation Subset:  AIM; IM    
Department of Anesthesia and Intensive Care, St. Vincent's Hospital, Dublin, Ireland.
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MeSH Terms
Aged, 80 and over
Anesthesiology / instrumentation
Esophagus / metabolism*
Gastroesophageal Reflux / etiology*
Hydrogen-Ion Concentration
Laryngeal Masks / adverse effects*
Masks / adverse effects*
Middle Aged
Monitoring, Intraoperative / instrumentation,  methods
Comment In:
Anesth Analg. 1996 Jan;82(1):215   [PMID:  8712405 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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