Peer-reviewed veterinary case report
What is the definition of intraoperative hypotension in dogs? Results from a survey of diplomates of the ACVAA and ECVAA.
- Journal:
- Veterinary anaesthesia and analgesia
- Year:
- 2015
- Authors:
- Ruffato, Marco et al.
- Affiliation:
- Southeast Veterinary Referral Center · United States
- Species:
- dog
Plain-English summary
Veterinary anesthesia specialists were surveyed to find out how they define low blood pressure (hypotension) in dogs during surgery or diagnostic procedures. They found that most agree that hypotension is when the systolic blood pressure (the top number in a blood pressure reading) is below 87 mmHg for surgical cases and slightly lower for diagnostic cases. They also noted that treatment is usually considered necessary when blood pressure drops to around 85 mmHg for surgery and 84 mmHg for diagnostics. Overall, the specialists have a clear understanding of what constitutes low blood pressure in dogs and when to take action.
Abstract
OBJECTIVE: Determine arterial blood pressure range that diplomates of the American College of Veterinary Anesthesia and Analgesia (ACVAA) and European College of Veterinary Anaesthesia and Analgesia (ECVAA) use to define intraoperative hypotension in dogs and identify the threshold values used for intervention. STUDY DESIGN: Survey of veterinary anesthesia specialists. POPULATION: Diplomates of the ACVAA and ECVAA. METHODS: ACVAA and ECVAA diplomates (n = 313) were invited to participate in an Internet-based survey regarding anesthetized healthy dogs undergoing two types of procedures (diagnostic or surgical). RESULTS: There were 151 respondents to the survey; 70.2% were ACVAA diplomates and 29.8% were ECVAA diplomates. The majority of the respondents (70.9%) worked in academia while the others were in private practice (19.2%), or research, diagnostic or pharmaceutical fields (9.9%). Hypotension was defined (mean ± SD) by the respondents as systolic arterial blood pressure (SAP) <87 ± 8 mmHg for surgical cases and <87 ± 6 mmHg for diagnostic cases, or mean arterial pressure (MAP) <62 ± 4 mmHg for both types of cases. Arterial pressures reported to prompt treatment were SAP 85 ± 13 mmHg or MAP 61 ± 4 mmHg in surgical cases, and SAP 84 ± 11 mmHg or MAP 63 ± 8 mmHg in diagnostic cases. CONCLUSIONS AND CLINICAL RELEVANCE: There was agreement between ACVAA and ECVAA diplomates on the definition of intraoperative hypotension in dogs during anesthesia. The blood pressures used to define hypotension were similar to the pressures that would prompt diplomates to start treatment. Readers could infer that diplomates define hypotension as a clinical condition that requires treatment at the time of diagnosis.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/24814975/