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Improvement of arterial oxygenation in free-ranging moose (Alces alces) immobilized with etorphine-acepromazine-xylazine

Lian, Marianne; Evans, Alina L.; Bertelsen, Mads F.; Fahlman, Åsa; Haga, Henning A.; Ericsson, Göran; Arnemo, Jon Martin
Journal article, Peer reviewed
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Marianne Lian et al 2014.pdf (214.0Kb)
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http://hdl.handle.net/11250/218004
Utgivelsesdato
2014-08-25
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  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed [1666]
Sammendrag
Background: The effect of intranasal oxygen and/or early reversal of xylazine with atipamezole on arterial

oxygenation in free-ranging moose (Alces alces) immobilized with etorphine-acepromazine-xylazine with a cross-sectional

clinical study on 33 adult moose was evaluated.

Moose were darted from a helicopter with 3.37 mg etorphine, 15 mg acepromazine and 75 mg xylazine. Intranasal oxygen

at a flow rate of 4 L/min and/or early reversal of xylazine with 7.5 mg atipamezole to improve oxygenation was evaluated,

using four treatment regimens; intranasal oxygen (n = 10), atipamezole intramuscularly (n = 6), atipamezole

intravenously (n = 10), or a combination of atipamezole intravenously and intranasal oxygen (n = 7). Arterial

blood was collected 7–30 minutes (min) after darting, and again 15 min after institution of treatment and

immediately analyzed using an i-STAT®1 Portable Clinical Analyzer.

Results: Before treatment the mean ± SD (range) partial pressure of arterial oxygen (PaO2) was 62 ± 17 (26–99)

mmHg. Twenty-six animals had a PaO2 < 80 mmHg. Ten had a PaO2 of 40–60 mmHg and three animals had a

PaO2 < 40 mmHg. Intranasal oxygen and intravenous administration of atipamezole significantly increased the

mean PaO2, as did the combination of the two. In contrast, atipamezole administered intramuscularly at the evaluated

dose had no significant effect on arterial oxygenation.

Conclusions: This study shows that intranasal oxygen effectively improved arterial oxygenation in immobilized moose,

and that early intravenous reversal of the sedative component, in this case xylazine, in an opioid-based immobilization

drug-protocol significantly improves arterial oxygenation.

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