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Retest-reliability and convergent validity of noninvasive blood pressure determination: arm sphygmomanometry vs.
Abstract:
Blood pressure is usually determined by arm sphygmomanometry. However, this technique does not allow continuous blood pressure monitoring. Over the last years, a technique introduced by Peñaz makes it feasible to determine blood pressure noninvasively and continuously from the finger artery. Study on 46 normotensives showed that both methods have high retest-reliabilities for systolic blood pressure while for diastolic blood pressure, arm sphygmomanometry resulted in lower reliabilities than the Peñaz-method. Between-method-comparisons showed only small correlations. Diastolic blood pressure levels were significantly lower in the Peñaz-method than in arm sphygmomanometry. In conclusion, blood pressure levels determined by arm sphygmomanometry and the Peñaz-method differ systematically because of different methodologies. If blood pressure or blood pressure changes are determined, the method and the circumstances of its application need to be carefully reported.
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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(one-step method)
Prepare for the Procedure:
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

