[Our experience with the Univent tube]

We describe our experience in managing single lung ventilation (SLP) with the Univent bronchial blocker tube from 1993 to the present.

Patients were grouped based on the following criteria: use of a double lumen tube as an alternative to SLP (group 1), use of SLP and tracheotomy (group 2), or difficult or dangerous orotracheal intubation (group 3).

The mean age of the 32 patients (22 men and 10 women) studied was 45.7 +/- 12.2 years. Mean weight was 67.9 +/- 13.4 kg. Ten patients were physical status ASA I, 10 were ASA II, 10 were ASA III and 2 were ASA IV. Group 1 contained 28 patients (18 receiving right SLP and 10 receiving left SLP; use of SLP failed to collapse the lung in 4 patients [14.3%]). Group 2 consisted of 5 patients and group 3 contained 11. The Univent tube was used in 4 patients in group 3 who did not require use of SLP but whose intubation was considered difficult and in whom laryngoscopic findings were consistent with a Cormack-Lehane group III classification. The Univent bronchial blocker tube was used as a guide, such that intubation was achieved on the first try. The tube was removed from 3 patients (8%) in the intensive care recovery ward. The remaining 29 tracheas were extubated in the operating room. No side effects attributable to the Univent tube were recorded.

The advantages and disadvantages of this new tool for the management of SLP mean that it may be useful for specific situations (such as for SLP with difficult intubation or in patients with tracheotomies or aneurysms of the descending thoracic aorta), but that it does not replace conventional methods. We believe that the Univent bronchial blocker tube should be available as part of operating room equipment.