Anesthesia Techniques and Monitors

Endobronchial intubation detected by insertion depth of endotracheal tube, bilateral auscultation, or observation of chest movements: randomised trial

Sitzwohl C, Langheinrich A, Schober A, et al (Med Univ of Vienna General Hosp, Austria; et al) BMJ 341:c5943, 2010^§

Abstract

Objective

To determine which bedside method of detecting inadvertent endobronchial intubation in adults has the highest sensitivity and specificity.

Design

Prospective randomised blinded study.

Setting

Department of anaesthesia in tertiary academic hospital.

Participants

160 consecutive patients (American Society of Anesthesiologists category I or II) aged 19-75 scheduled for elective gynaecological or urological surgery.

Interventions

Patients were randomly assigned to eight study groups. In four groups, an endotracheal tube was fibreoptically positioned 2.5-4.0 cm above the carina, whereas in the other four groups the tube was positioned in the right mainstem bronchus. The four groups differed in the bedside test used to verify the position of the endotracheal tube. To determine whether the tube was properly positioned in the trachea, in each patient first year residents and experienced anaesthetists were randomly assigned to independently perform bilateral auscultation of the chest (auscultation); observation and palpation of symmetrical chest movements (observation); estimation of the position of the tube by the insertion depth (tube depth); or a combination of all three (all three).

Main Outcome Measures

Correct and incorrect judgments of endotracheal tube position.

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