Azmin Huda, Abdul Rahim
(2007)
A comparative study between cobrapla and
laryngeal mask airway classic in spontaneous
ventilating adult patients.
Other.
Universiti Sains Malaysia.
(Submitted)
Abstract
The purpose of this study is tp _assess whether the newly developed CobraPLA is a
reliable, easy and safe device for use in adult patient undergoing general anaesthesia. We
compared the use of the CobraPLA with the laryngeal mask airway in spontaneously
ventilating adult patients undergoing general anaesthesia for elective surgery.·
A randomized prospective study was conducted on 56 premedicated adult patients of
ASA 1 and 2, aged between 18 to 65 years. They were divided into 2 groups ( n= 28/
group) receiving either CobraPLA or LMA as airway device. After inhalational induction
of anaesthesia with intravenous propofol 2mglkg and intravenous fentanyl 1 meg/kg, the
CobraPLA or LMA was inserted and the patients breathed spontaneously throughout the
surgery. Anaesthesia was maintained with nitrous oxide, oxygen and sevoflurane. The
airway device was removed at the end of surgery with the patients fully awake. The
duration of insertion and number of attempts needed to successfully secure the airway
wa~ recorded. Systolic blood pressure. diastolic blood pressure, mean arterial blood
pressure , heart rate, saturation and end tidal carbon dioxide at different time interval
were recorded. The incidence of post operative complications were also recorded.
We found that there was longer time of insertion in the CobraPLA group as compared to
LMA group and the difference was statistically significant. However there was no
difference in the number of attempts needed to secure the respective airways. The
ETC02 was higher in the CobraPLA group as compared to LMA group and the
difference was statistically significant. Saturation was found to be higher in the LMA group and the difference was also statistically significant. However there was no
difference in haemodynamic changes. Incidence of blood staining of the airway devices
was higher in the CobraPLA group and was statistically significant. Nevertheless the
incidence of sore throat was equal in both groups.
We concluded that during spontaneous ventilation in adult patients undergoing general
anaesthesia; the CobraPLA is not as reliable in providing a satisfactory airway and we
consider it is not a suitable alternative to the_ laryngeal mask airway.
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