Indirect mean arterial pressure in the anesthetized dog

Area of Science:

• Veterinary Medicine
• Cardiovascular Physiology

Background:

• Accurate measurement of mean arterial pressure (MAP) is crucial for assessing cardiovascular health in animals.
• The oscillometric method is a common non-invasive technique for blood pressure monitoring.

Purpose of the Study:

• To evaluate the accuracy of indirect mean arterial pressure measurement in dogs using the oscillometric method.
• To determine the optimal cuff size relative to forelimb circumference for reliable readings.

Main Methods:

• Indirect mean arterial pressure was measured using the oscillometric method in 14 pentobarbital-anesthetized dogs.
• Direct mean arterial pressure was measured concurrently for comparison.
• The effect of cuff width in relation to forelimb circumference was investigated.

Main Results:

• Indirect mean arterial pressure measurements showed agreement with direct measurements.
• Optimal agreement was achieved when the cuff width was approximately 40% of the dog's forelimb circumference.
• This finding was consistent across a wide range of mean arterial pressures (23-160 mmHg).

Conclusions:

• The oscillometric method can accurately measure indirect mean arterial pressure in dogs.
• Cuff size selection is critical for accurate indirect blood pressure measurements.
• A cuff width of 40% of forelimb circumference is recommended for reliable oscillometric MAP assessment in dogs.