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Excerpt
Patients and Methods: Fifty consecutive patients ASA I-II, M/F: 22/28, aged 25-65 yr, weight 71-96 kg were included. Anaesthesia was induced with propofol, fentanyl and cis-atracurium. The LMA C TrachTM was inserted exactly the same as the LMA FastrachTM. In all cases we were seeking for the optimum ventilation position with the ILMA (Chandy manoeuvre) and at this position the viewer was attached. Once the airway was secured and patient was being ventilated, the viewer was switched on, and a clear image of the larynx was displayed in real time. The tracheal tube was viewed entering the trachea. Successful ILM placement was confirmed with bag ventilation 8-10 ml/kg and capnography. In case of failure with the C Trach the lightguided technique was applied.
Results: A straight silicone tracheal tube (Intavent) size 7.5-8.0 mm ID was placed easily and successfully in 45/50 (90%) of patients. Tracheal intubation failed in the first 5/50(10%) patients, due to technical reasons (not able to achieve a clear image on the viewer). These cases were managed successfully with the light-guided technique. After viewer placement in 10/45 (22%) patients adjusting manoeuvres performed to have a view of the vocal cords. In 8/45 (18%) patients the LMA C Trach was removed and replaced to clean the fiberoptics. The time required after viewer placement to successful intubation ranged between 15-105 seconds. Trauma due to LMA was not serious in 2/50 (4%) of patients.
Conclusion: The LMA C Trach was safe and effective for tracheal intubation in anaesthetised patients.
