| dc.description.abstract | This randomized clinical study compares the use of the endotracheal tube (golden standard) with the new laryngeal mask, the V-gel, in spontaneous breathing cats under isoflurane anesthesia, in respect to isoflurane leakage, ease of use and irritation of the upper respiratory system after surgery.
Material/Methods: All cats were admitted for spaying or castration and were classified as ASA-1 or ASA-2 patient. Ten cats in the V-gel group and eleven cats in the ET-group. The cats premedicated with 20 µg/kg of dexmedetomidine and 15 µg/kg buprenorphine IM. Induction started with propofol, dosed to effect. For analgesic purposes the cats received 0.2 mg/kg metacam before surgery and 0.05mg/kg/day metacam per os by their owners, the first four days following surgery.
The following variables were measured:
-Required dose of propofol necessary for intubation or placing the V-gel;
-Time between induction and recording of a first capnogram in seconds;
-Detection of leakage of isoflurane to the environment measured with the Miran 205B Type Saphiree 100 isoflurane analizer;
-Post-operative discomfort of the upper respiratory system, subjectively scored by the researcher during the recovery.
-Post-operative discomfort of the upper respiratory system, subjectively scored with the owner 24 hours after surgery, by means of a questionnaire.
The variables were tested by the Student-T-test and the discomfort was being tested by the Chi-Square test. The level of significance was set to P<0.05.
Results: There was no significant difference when comparing the required dose propofol, ET-group (8.29±2.37mg) and V-gel group (6.61±2.93mg). There was a significant difference regarding the time between induction and first reading on the capnometer. Where the V-gel group had a shorter induction time (52.59±30.47sec.) compared to the ET-group (117. 27±27.47sec.). Both groups showed some leakage of the isoflurane, V-gel group (9.89±10.47 mg/m3) and ET-group (9.65±15.09 mg/m3), but no significant difference was found. During recovery six cats from the ET-group were found with an upper airway stridor. According to the Chi-Square test, there were statistically significant fewer cats with an upper airway stridor in the V-gel group (Chi-Square test=7.636364; p=0.005720; df=1).The discomfort scored by the owners showed no significant difference between both groups.
Conclusion: The V-gel is easy to use and a good alternative for endotracheal intubation in spontaneous breathing cats under isoflurane anesthesia. | |
