Abstract | OBJECTIVES: METHODS: A retrospective case series and a retrospective single cohort study were conducted using dogs and cats with tick paralysis requiring mechanical ventilation. An index of oxygenating performance of the lung (PF ratio of partial pressure of oxygen in arterial blood to fraction of inspired oxygen) was derived from arterial blood gas analysis; patients euthanased because of veterinary costs were identified and Kaplan-Meier survival analyses performed. RESULTS: In total, 36.6% of patients were ventilated because of hypoxaemia refractory to oxygen therapy, 38.3% because of hypoventilation, 18.3% because of unsustainable respiratory effort and 6.6% because of respiratory arrest. Median duration of mechanical ventilation was 23 h, median time hospitalised was 84 h and 63.9% of all patients requiring mechanical ventilation survived to discharge from the hospital. Survival probability increased to 75% when cases of cost-based euthanasia were right-censored rather than treated as deaths. The survival probability of patients ventilated because of hypoxaemia (52.6%) was significantly less than for those ventilated because of hypoventilation (90.5%). The first measured PF ratio after commencing mechanical ventilation was not significantly associated with survival probability. CONCLUSIONS:
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Authors | R A Webster, P C Mills, J M Morton |
Journal | Australian veterinary journal
(Aust Vet J)
Vol. 91
Issue 6
Pg. 233-9
(Jun 2013)
ISSN: 1751-0813 [Electronic] England |
PMID | 23718792
(Publication Type: Journal Article)
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Copyright | © 2013 The Authors. Australian Veterinary Journal © 2013 Australian Veterinary Association. |
Topics |
- Animals
- Cat Diseases
(parasitology, therapy)
- Cats
- Cohort Studies
- Dog Diseases
(parasitology, therapy)
- Dogs
- Ixodidae
- Kaplan-Meier Estimate
- Respiration, Artificial
(methods, veterinary)
- Respiratory Insufficiency
(parasitology, therapy, veterinary)
- Retrospective Studies
- Tick Paralysis
(parasitology, therapy, veterinary)
- Treatment Outcome
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