Feasibility analysis of laryngeal mask airway in cats under inhalation anesthesia with spontaneous ventilation
Keywords:
Anesthesic, Ventilarion, AirwaysAbstract
This study aimed to evaluate the feasibility of using a laryngeal mask in cats during inhalation anesthesia under spontaneous ventilation compared to endotracheal intubation. The procedure was carried out at the Veterinary Clinical Center of Patos de Minas (CCV/UNIPAM), using sixteen healthy male cats of different breeds and ages. They were divided into two groups, G1 - intubation of 6 animals with endotracheal tube, and G2 - intubation of 10 animals with laryngeal mask. The following parameters were determined for both groups: heart rate, respiratory rate, body temperature, oxymetry, systolic pressure, diastolic pressure, and mean pressure, being collected at T1 (30 minutes before the pre-anesthetic medication), T2, (immediately before the incision), T3, T4, and T5 at 10, 15, and 20 minutes after the beginning of the procedure, respectively. For statistical analyses, the Friedman's test was used, and for the variables p<0.5, the Wilcoxon test was used. When evaluating each device separately, no statistically significant differences were found within the groups. When compared at different times, significant differences were found in Respiratory Rate and Systolic Pressure. The stability of physiological parameters observed at different times during the transanesthetic period of cats that used the laryngeal mask, compared to those that used an endotracheal tube, corroborates the efficacy of the laryngeal mask as a supra-glottic device for maintaining inhalational anesthesia in felines.
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