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Veterinary surgery : VS · Sep 1991
Closed system delivery of halothane and isoflurane with a vaporizer in the anesthetic circle.
- R M Bednarski and W W Muir.
- Department of Veterinary Clinical Sciences, Ohio State University, Columbus.
- Vet Surg. 1991 Sep 1;20(5):353-6.
AbstractForty-four healthy dogs undergoing elective ovariohysterectomy were anesthetized with halothane or isoflurane delivered with an in-circuit vaporizer with closed system flow rates or an out-of-circuit vaporizer with semi-closed system flow rates. When dogs were anesthetized with halothane, there were no differences in heart rate, blood pressure, body temperature, respiratory rate, or lingual venous pH, PCO2, or PO2 during induction and maintenance. Lingual venous PO2 was significantly less but still within a clinically acceptable range when isoflurane was used in an in-circuit vaporizer. Recovery times tended to be longer with in-circuit vaporizers. The amount of anesthetic used was not affected by vaporizer location. In-circuit vaporizers were suitable for delivery of halothane or isoflurane to healthy dogs.
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