Peer-reviewed veterinary case report
Outcomes of dogs on mechanical ventilation over 24 hours
By McNally, Abigail E et al.·Published in Journal of veterinary emergency and critical care (San Antonio, Tex. : 2001)·2026·Department of Clinical Science and Services, United Kingdom·View original on PubMed →
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Original publication title: Retrospective Study on Liberation in Dogs Undergoing Mechanical Ventilation for Longer Than 24 Hours.
- Species:
- dog
Plain-English summary
A group of 47 dogs that needed mechanical ventilation for over 24 hours were studied to see how many could be successfully taken off the ventilator. Out of these, 24 dogs (about 51%) were successfully liberated, and 22 of those survived to go home. The study found that dogs with higher levels of carbon dioxide in their blood were less likely to be successfully taken off the ventilator. Interestingly, many dogs that were successfully taken off did not meet all the usual criteria for being ready, especially if they were on medications to support their blood pressure.
People also search for: dog mechanical ventilation recovery · dog breathing support success rate · signs my dog can come off ventilator
Abstract
OBJECTIVE: To describe liberation in a population of dogs undergoing ≥24 h of mechanical ventilation (MV) and to assess for differences between successful and unsuccessful liberation attempts as well as adherence to criteria for veterinary and human readiness to discontinue MV. DESIGN: Retrospective study. SETTING: University teaching hospital. ANIMALS: Forty-seven client-owned dogs undergoing ≥24 h of MV. MEASUREMENTS AND MAIN RESULTS: Medical records were retrospectively reviewed; signalment, underlying disease, indications for MV, and survival to discharge were recorded. Data were collected up to 2 h before discontinuation of MV, noting ventilator settings and physiologic and blood gas variables. Twenty-four of 47 (51.1%) cases undergoing MV were successfully liberated; of these, 22 (91.7%) dogs survived to discharge. Dogs were successfully liberated using various modes of ventilation, including assist control (15/24 [62.5%]), synchronized intermittent mandatory ventilation (8/24 [33.3%]), and pressure support ventilation (1/24 [4.2%]). Forty-eight attempts at liberation occurred in 30 dogs. Of these, 24 of 48 (50%) were successful. Only end-tidal carbon dioxide (ETCO) was different between successful and unsuccessful liberation attempts, being higher in unsuccessful attempts (35 ± 6.8 vs. 43.7 ± 5.5 mm Hg; p < 0.0001). Sufficient information was available to assess adherence to veterinary liberation criteria in 31-36 liberation attempts, depending on the criterion. Liberation success did not differ between dogs that met the criteria and those that did not. Of dogs with complete data that were successfully liberated, 55% (10/18) did not meet current veterinary criteria to undergo a spontaneous breathing trial (SBT). The prevailing reason for failing to meet the veterinary criteria was cardiovascular instability (8/10), often due to vasopressor use (n = 7). CONCLUSIONS: Most successfully liberated cases did not fulfill the veterinary criteria for readiness to undergo an SBT. Dogs should not necessarily be precluded from undergoing an SBT or liberation attempt if they are receiving vasopressors but meet the remaining criteria.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41999172/