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Successful pharyngeal pulse oximetry in low perfusion states

From the University of Queensland, Department of Anaesthesia and Intensive Care, Cairns Base Hospital, Australia.

Address correspondence to: Dr. J. Brimacombe. Phone: 61-7-40-506960; Fax: 61-7-40-506854; E-mail: 100236,2343{at}compuserve.com

Purpose: We describe pharyngeal oximetry with the laryngeal mask airway in two patients with low perfusion states where finger oximetry failed.

Clinical Features: One patient was a 47-yr-old man with septic shock and the other a 64-yr-old man with multiorgan failure. In both patients, a # 4 laryngeal mask airway with a pediatric pulse oximeter probe was inserted behind the tracheal tube. A good waveform was obtained and oxygen saturation was 0-2% lower than arterial samples.

Conclusion: Pharyngeal oximetry with the laryngeal mask airway is feasible in low perfusion states when finger oximetry fails.

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