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Minimum anesthetic concentration of isoflurane and sevoflurane and cardiorespiratory effects of varying inspired oxygen fractions in Magellanic penguins (Spheniscus magellanicus)

da Silva, André Nicolai Elias ; Dutra, Gustavo Henrique Pereira ; Justo, André Augusto ; de Araujo, Giuliano Souza Mendonça ; Bressan, Thais Feres ; Carregaro, Adriano Bonfim

Veterinary research communications, 2024-06, Vol.48 (3), p.1621-1630 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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Título:
Minimum anesthetic concentration of isoflurane and sevoflurane and cardiorespiratory effects of varying inspired oxygen fractions in Magellanic penguins (Spheniscus magellanicus)
Autor: da Silva, André Nicolai Elias ; Dutra, Gustavo Henrique Pereira ; Justo, André Augusto ; de Araujo, Giuliano Souza Mendonça ; Bressan, Thais Feres ; Carregaro, Adriano Bonfim
Assuntos: Anesthesia ; Anesthesia, Inhalation - veterinary ; Anesthetics, Inhalation - administration & dosage ; Anesthetics, Inhalation - pharmacology ; Animals ; Aquariums ; Biomedical and Life Sciences ; Birds ; Blood ; Blood Gas Analysis - veterinary ; Carbon dioxide ; Female ; Heart rate ; Heart Rate - drug effects ; Hypoxemia ; Isoflurane ; Isoflurane - administration & dosage ; Isoflurane - pharmacology ; Life Sciences ; Male ; Oxygen ; Oxygen - blood ; Penguins ; Sevoflurane ; Sevoflurane - pharmacology ; Spheniscidae - physiology ; Spheniscus magellanicus ; Veterinary medicine ; Veterinary Medicine/Veterinary Science ; Zoology
É parte de: Veterinary research communications, 2024-06, Vol.48 (3), p.1621-1630
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SourceType-Scholarly Journals-1
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Descrição: The aim of this study was to determine the minimum anesthetic concentration of isoflurane (MAC ISO ) and sevoflurane (MAC SEVO ) and evaluate the cardiorespiratory changes induced by varying fractions of inspired oxygen (FiO 2 ) in Magellanic penguins ( Spheniscus magellanicus ). Twenty adult penguins (3.53 ± 0.44 kg) of undetermined sex were used. Both MAC ISO ( n = 9) and MAC SEVO ( n = 13) were established using an up-and-down design. Next, twelve mechanically ventilated penguins were maintained at 1 MAC ISO or 1 MAC SEVO ( n = 6 per group) with the FiO 2 initially set at 1.0. Three FiO 2 values (0.6, 0.4 and 0.2) were then held constant during anesthesia for 20 minutes each. Arterial blood samples were collected for gas analysis after the 20-minute period for each FiO 2 . Mean ± SD MAC ISO was 1.93 ± 0.10% and MAC SEVO was 3.53 ± 0.13%. Other than heart rate at 0.6 FiO 2 (86 ± 11 beats/minute in MAC ISO and 132 ± 37 beats/minute in MAC SEVO ; p = 0.041), no significant cardiorespiratory differences were detected between groups. In both groups, decreasing the FiO 2 produced increased pH values and reduced partial pressures of carbon dioxide and bicarbonate. Partial pressures of oxygen (PaO 2 ) gradually lowered from 1.0 FiO 2 through 0.2 FiO 2 , though hypoxemia (PaO 2 < 80 mmHg) occurred only with the latter FiO 2 . The MAC ISO and the MAC SEVO for the Magellanic penguin fell within the upper range of reported avian MAC estimates. To prevent hypoxemia in healthy, mechanically ventilated, either isoflurane- or sevoflurane-anesthetized Magellanic penguins, a minimum FiO 2 of 0.4 should be used.
Editor: Dordrecht: Springer Netherlands
Idioma: Inglês

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Minimum anesthetic concentration of isoflurane and sevoflurane and cardiorespiratory effects of varying inspired oxygen fractions in Magellanic penguins (Spheniscus magellanicus)

da Silva, André Nicolai Elias ; Dutra, Gustavo Henrique Pereira ; Justo, André Augusto ; de Araujo, Giuliano Souza Mendonça ; Bressan, Thais Feres ; Carregaro, Adriano Bonfim

Dordrecht: Springer Netherlands

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