The authors declare no conflict of interests.
Measuring level of agreement between values obtained by directly measured blood pressure and ultrasonic Doppler flow detector in cats
Article first published online: 3 APR 2014
© Veterinary Emergency and Critical Care Society 2014
Journal of Veterinary Emergency and Critical Care
Volume 24, Issue 3, pages 272–278, May/June 2014
How to Cite
da Cunha, A. F., Saile, K., Beaufrère, H., Wolfson, W., Seaton, D. and Acierno, M. J. (2014), Measuring level of agreement between values obtained by directly measured blood pressure and ultrasonic Doppler flow detector in cats. Journal of Veterinary Emergency and Critical Care, 24: 272–278. doi: 10.1111/vec.12161
Presented as an abstract at the International Veterinary Emergency and Critical Care Symposium/American College of Veterinary Anesthesia meeting, San Antonio, TX, September 2012.
- Issue published online: 24 JUN 2014
- Article first published online: 3 APR 2014
- Manuscript Accepted: 1 JAN 2014
- Manuscript Received: 20 SEP 2012
- blood pressure;
To determine if blood pressure measured with an ultrasonic Doppler flow detector (Doppler) is in good agreement with directly measured blood pressures in anesthetized cats.
Prospective observational study.
University veterinary teaching hospital.
Thirty-nine cats undergoing routine neutering.
Cats were divided into 2 groups; 19 cats enrolled in Group A had a 24-Ga catheter inserted into a dorsal pedal artery; 20 cats in Group B had a 20-Ga catheter placed in a femoral artery. In both groups, systolic, diastolic, and mean arterial pressures were directly measured using a validated pressure measurement system. Indirect values were compared against direct blood pressure measurements.
There was no difference between groups. Overall, there was poor agreement with a significant bias observed between Doppler and directly measured blood pressures. For the systolic arterial pressure the bias was −8.8 with limits of agreements (LOA) of −39.3 and 21.7. For the mean arterial pressure, the bias was 14.0 with LOA of −13.9 and 41.9. For the diastolic arterial pressure, the bias was 27.9 with LOA of −4.4 and 60.2. Methodology, weight, sex, and replicates did not have a significant effect on the difference between indirect and direct measurements in any model.
Results suggest poor agreement between Doppler values and directly measured blood pressures in anesthetized cats. Use of Doppler in cats could be misleading and readings should be interpreted with caution in a clinical context.