Anesthesia in pigs using phencyclidine and halothane
Gyrd-Hansen, N.
Nordisk Veterinaermedicin 23(6): 281-287
1971
ISSN/ISBN: 0029-1579 PMID: 5168699 Document Number: 31495
Fifteen pigs weighing from 19 to 97 kg were anaesthetized for 2.5 to 3 hours. Anaesthesia was induced by i/m injection of 2 mg/kg phencyclidine and continued with halothane by mask, 3-4% initially and then 1.5-2.5% in oxygen (flow rate 2-3.5 l/min). The anaesthesia apparatus used consisted of a halothane chamber placed on an oxygen container equipped with a flowmeter. On the tube connecting the halothane chamber with the mask a 2 litre rebreathing bag and an expiration valve were placed. Most of the expired air was collected in the bag, while the rest of it escaped through the valve. During the anaesthesia the following parameters were estimated every 20 min. : pulse rate, respiration rate, body temp. blood pressure, haematocrit, Hb, standard bicarbonate, and the conc. of Na and K in plasma. All these parameters, except the blood pressure, were measured prior to the start of the experiments. On an average the pigs became recumbent within 5 min. of the phencyclidine injection. With a conc. of 3 to 4% halothane in the oxygen, surgical anaesthesia was attained within 5 min. Changes in the parameters caused by the anaesthesia are tabulated. The pigs were awake on an average 33 min. after the mask had been removed. Complete recovery from anaesthesia to the point where the pigs could rise and stand required an average of 2 hours. The rate of halothane used was on an average 7.5 ml per hour for pigs weighing 20 to 40 kg, 9.5 ml per hour for pigs weighing 40 to 80 kg and 11-7 ml per hour for pigs weighing 80 to 100 kg.