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Direct and indirect blood pressure measurements in baboons
Abstract:
The accuracy and precision of indirect blood pressure measurements in baboons were studied by comparing the results of indirect measurements with simultaneous direct measurements. The indirect measurements were made by four observers using a Doppler ultrasound instrument. A statistically significant difference between the two methods was found for systolic blood pressure but not for diastolic blood pressure. The indirect systolic averaged 13.8 mmHg higher than direct systolic and was found to be more precise than the indirect diastolic. The difference in blood pressure obtained by the two methods varied over animals and observers with an interaction between animals and observers. The effect of arm was examined by performing direct blood pressure measurements in both arms. No statistically significant arm effect was found.
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Related Concept Videos
Sites for measuring blood pressure
The Brachial Artery: Primary Site for Blood Pressure Measurement
Equipments Used To Measure Blood Pressure
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Assessment of blood pressure in brachial artery(two-step method)
Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Pre-Procedural Guidelines for Assessing Blood Pressure
Measurement of Blood Pressure