The location of blood pressure measurement significantly impacts signal quality and readings
Evidence confirms that the anatomical location of blood pressure measurement—such as peripheral sites versus central arteries or varying positions on the upper limb—significantly affects pulse wave morphology, signal stability, and absolute pressure readings.
The retrieved literature consistently supports the claim that the site of blood pressure measurement alters signal quality and readings. Paper [1] demonstrates significant pressure amplification differences between radial and aortic sites. Paper [4] highlights that different upper-limb measurement locations (arm vs. wrist/finger) yield clinically distinct readings requiring standardized guidelines. Paper [7] evaluates how micro-locations along the radial artery impact catheter stability and signal dysfunction. Other papers address different physiological measures and do not contradict the core premise.
Alfredo L. Pauca, Michael F. O’Rourke, Neal D. Kon. Prospective Evaluation of a Method for Estimating Ascending Aortic Pressure From the Radial Artery Pressure Waveform. 2001. https://doi.org/10.1161/hy1001.096106
Demonstrates that pulse wave reflection and arterial properties vary significantly between peripheral sites like the radial artery and central sites like the ascending aorta.
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Yutaka Imai, Kuniaki Otsuka, Yuhei Kawano, Kazuyuki Shimada, Hiroshi Hayashi, Osamu Tochikubo, Masaaki Miyakawa, Koshiro Fukiyama. Jananese Society of Hypertension (JSH) Guidelines for Self-Monitoring of Blood Pressure at Home. 2003. https://doi.org/10.1291/hypres.26.771
Guidelines specify that blood pressure measurement location (upper arm versus wrist or finger) significantly impacts measurement accuracy and clinical utility.
Yang X, Liang HM, Huang YB, Li S, Chen Y, Luo TF, Wang W, Li J, Zhao YY, Jin Y, Wang F, Yao YC, Jin SQ, Zheng ZN. Effects of modified site for radial artery cannulation on the stability of arterial blood pressure monitoring in patients undergoing elective surgery (MoSRAC): protocol for a randomised controlled trial.. 2026. https://doi.org/10.1136/bmjopen-2025-111900
Investigates how modifying the specific cannulation site along the radial artery impacts catheter stability and signal quality during blood pressure monitoring.
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