Omar, Mahamarowi and Muhamad, Noor Zairul
(2005)
Comparison of the use of the laryngeal tube (vbm) and laryngeal
mask airway under anaesthesia during spontaneous ventilation.
Comparison of the use of the laryngeal tube (vbm) and laryngeal mask airway under anaesthesia during spontaneous ventilation.
(Submitted)
Abstract
The purpose of this study is to assess whether the newly developed laryngeal tube {VBM) is a
fast, reliable and easy device for airway management. We compared the use of the laryngeal
tube (VBM) with the laryngeal mask airway in spontaneously ventilating adult patient undergoing
general anesthesia and measured the easiness of insertion, incidence of airway trauma and sore
throat and also the haemodynamic responses to insertion of these devices. A randomized single
blinded prospective study was conducted involving a total of 121 premedicated, ASA 1 or 11
patients, aged 18 to 65 years and were divided into 2 groups either laryngeal tube {VBM) or
laryngeal mask airway group as for airway man~gement during elective surgery. After a
standardized induction of anaesthesia with fentanyl 1.5 ng.kg-1 and propofol 2 mg.kg-1, a size 3 or
4 laryngeal tube {VBM) or laryngeal mask airway was inserted and the patients breathed
spontaneously throughout the surgery with no muscle relaxants given. Anaesthesia was
maintained with nitrous oxide, oxygen and isoflurane. The airway device was removed at the end
of surgery with the patients fully awake. The speed and ease of insertion and the number of
attempts needed to successfully secure the airway were recorded. The incidence of airway
trauma, sore throat and haemodynamic changes such as systolic blood pressure, diastolic blood
pressure, mean arterial pressure and heart rate at different time intervals were recorded.
Episodes of airway manipulations intraoperatively and end-tidal C02 at various time intervals
were also recorded.
We found that there was no statistically significant difference in time required for successful
insertion and number of attempts for both groups. We were able to achieve a clear airway in
75.4% patients in L T group at the first attempt. There were no difference in incidence of airway
trauma and sore throat between laryngeal tube and laryngeal mask airway. Both groups had no
statistical differences in haemodynamic parameters during spontaneous ventilation under
anaesthesia. Although, the incidence of airway manipulations and end - tidal C02 were higher
with laryngeal tu~e (~BM) compared to the larynge~l mask airway but it is not likely to be
clinically relevant 1n th1s study. We conclude that dunng spontaneous ventilation, the laryngeal
tube (VBM) is a suitable alternative to the laryngeal mask airway.
Actions (login required)
 |
View Item |
