Indwelling arterial catheters provide significantly higher accuracy than non-invasive blood pressure monitors
Clinical and physical evidence confirms that indwelling arterial catheters provide significantly higher accuracy and fidelity in blood pressure monitoring compared to non-invasive devices, which frequently miss critical hemodynamic events and suffer from systematic measurement errors.
The claim is specific and testable. Retrieved papers directly address the comparative accuracy of invasive arterial catheters versus non-invasive monitors, showing that non-invasive techniques (such as finger cuffs and auscultation) suffer from systematic underestimation and fail to detect critical hemodynamic episodes that intra-arterial lines accurately capture.
X. Chapalain, Thomas Morvan, Jean-Christophe Gentric, A. Subileau, C. Jacob, A. Cadic, Anais Caillard, Olivier Huet. Continuous non-invasive vs. invasive arterial blood pressure monitoring during neuroradiological procedure: a comparative, prospective, monocentric, observational study. 2024. https://doi.org/10.1186/s13741-024-00442-3
Study demonstrates that non-invasive surrogate blood pressure devices miss significant hypertensive and hypotensive events compared to arterial catheters, confirming higher accuracy in invasive monitoring.
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Bassil K, Agarwal A. Underestimation of systolic pressure in cuff-based blood pressure measurement.. 2025. https://doi.org/10.1093/pnasnexus/pgaf222
Paper explains physical mechanisms in cuff-based measurements that systematically lead to inaccurate systolic underestimation, highlighting the precision limits of non-invasive methods.
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