Comparison of invasive and noninvasive blood pressure measurements in anaesthetized horses using the Surgivet V9203.

The research presents a comparison between invasive blood pressure measurements and noninvasive methods in anesthetized horses using a device called the Surgivet V9203. The study suggests that noninvasive measurements could be an acceptable alternative to invasive ones for these animals.

Study Design and Methodology

In a university teaching hospital environment, this was a prospective clinical study involving 43 horses with an average weight of 485 kilograms and mean age of 103.4 months. Investigating the viability of noninvasive blood pressure monitoring as a substitute for invasive methods, the Surgivet V9203 device was used to collect blood pressure measurements via noninvasive and invasive methods. Noninvasive pressure measurements were obtained using a cuff over the ventral coccygeal artery or the metacarpal artery, while invasive measurements involved a catheter in the facial artery or metatarsal artery.

• The measurements obtained were compared using the Bland-Altman method for statistical analysis.
• A total of 143 paired readings were taken and all data was analyzed as a whole and according to the position of the horse and the pressure measurement value.
• To determine accuracy, the noninvasive measurement’s precision and bias were compared to guidelines set forth by the American College of Veterinary Internal Medicine Hypertension Consensus Panel (AHCP) and the Veterinary Blood Pressure Society (VBPS).

Results

The findings from the study indicate that noninvasive blood pressure measurements (NIBP) generally reported lower values than invasive blood pressure measurements (IBP) across all categories.

• The systolic arterial pressure (SAP) recorded had a bias of 6.8 and a precision of 11.9 mmHg.
• The mean arterial pressure (MAP) showed a bias of 1.9 and a precision of 10.0 mmHg.
• The diastolic arterial pressure (DAP) reported a bias of 5.7 and a precision of 10.8 mmHg.

The results for MAP and DAP measurements were in alignment with the recommended guidelines by the AHCP and VBPS.

Conclusions

Based on the identified bias and precision levels, the researchers concluded that NIBP measurements collected with the Surgivet V9203 are clinically acceptable and can be considered as an alternative to invasive blood pressure monitoring in anesthetized horses. This is particularly beneficial for routine elective surgeries.