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Risk of aspiration with the laryngeal mask
1Department of Anaesthesia, King's College Hospital, Denmark Hill, London.
British Journal of Anaesthesia
|April 1, 1994
Summary
The laryngeal mask airway did not increase gastric regurgitation risk during mechanical ventilation. One patient in each group showed dye, with one case involving tracheal and bronchial staining.
Area of Science:
- Anesthesiology
- Airway Management
Background:
- The laryngeal mask airway (LMA) is commonly used for airway management.
- Concerns exist regarding potential gastric regurgitation with LMA use, especially during mechanical ventilation.
Purpose of the Study:
- To evaluate if laryngeal mask airway use increases the risk of gastric regurgitation during mechanical ventilation.
Main Methods:
- A randomized study of 50 patients undergoing anesthesia.
- Patients received either artificial ventilation (Group A) or spontaneous ventilation (Group B) with an LMA.
- Gastric regurgitation was assessed using methylene blue dye and laryngoscopy.
Main Results:
- One patient in each group exhibited oropharyngeal staining with methylene blue.
- In Group A (mechanical ventilation), dye was also found in the trachea and bronchi.
Conclusions:
- Laryngeal mask airway use did not appear to elevate the risk of gastric regurgitation.
- Further investigation may be warranted for cases involving tracheal and bronchial staining.