Detection of extrinsic bronchial compression during foreign body removal by pulse oximetry. 
A case of stridor is described which was due to the presence of a foreign body in the larynx of an infant.  Following partial removal, compression of the right main bronchus was detected because of continuing low arterial oxygen saturation.  The use of pulse oximetry allowed this complication to be identified, and the advantages of this method of monitoring are discussed.