Related Experiment Video

Updated: Nov 21, 2025

Simultaneous Electrocardiography Recording and Invasive Blood Pressure Measurement in Rats
07:35

Simultaneous Electrocardiography Recording and Invasive Blood Pressure Measurement in Rats

Published on: January 31, 2019

16.0K

Beat-to-beat blood pressure measurement using a cuffless device does not accurately reflect invasive blood pressure

Mohammed A Moharram1, Luke C Wilson1, Michael Ja Williams1

  • 1Department of Medicine - HeartOtago, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand.

International Journal of Cardiology. Hypertension
|January 15, 2021
PubMed

Insights

A new cuffless blood pressure (BP) monitor showed significant bias compared to invasive and cuff-based BP measurements. This beat-to-beat (BtB) device is not suitable for clinical or research use.

Area of Science:

  • Cardiovascular Research
  • Biomedical Engineering
  • Medical Device Technology

Background:

  • Continuous, cuffless blood pressure (BP) monitoring offers a potential alternative to invasive and intermittent cuff-based methods.
  • Investigating the accuracy of cuffless beat-to-beat (BtB) BP devices is crucial for clinical adoption.
  • Current limitations necessitate validation against established BP measurement techniques.

Purpose of the Study:

  • To evaluate the accuracy of a specific cuffless BtB BP device (SOMNOtouch NIBP).
  • To compare BtB BP measurements against both invasive BP (iBP) and brachial cuff BP (cBP).
  • To determine the suitability of the BtB device for clinical and research applications.

Main Methods:

  • A cohort of patients undergoing coronary angiography (CA) and/or percutaneous coronary intervention (PCI) was recruited.
  • The BtB device was calibrated to an initial cBP reading.
  • Simultaneous BP measurements were taken using the BtB device, iBP, and cBP at two distinct time points.

Main Results:

  • The study was prematurely terminated due to significant measurement bias.
  • Analysis of 14 participants revealed that BtB BP readings were consistently higher than iBP.
  • A substantial bias was observed between BtB BP and iBP (SBP: 34.3 mmHg, DBP: 23.6 mmHg), and a similar bias existed between BtB BP and cBP.

Conclusions:

  • Significant discrepancies exist between the tested BtB BP device and both invasive and cuff-based BP measurements in patients undergoing CA/PCI.
  • The non-invasive BtB BP monitoring device demonstrated unsuitability for clinical or research use.
  • Further development and validation are required for cuffless BP monitoring technologies.
Abstract

Keywords:
BP, blood pressureBtB, beat to beatContinuous blood pressure monitorCuffless blood pressureDBP, diastolic blood pressurePTT, pulse transit timePulse arrival timeSBP, systolic blood pressureSOMNOtouch NIBPcBP, brachial cuff blood pressureiBP, invasive blood pressure

More Related Videos

Measuring the Carotid to Femoral Pulse Wave Velocity Cf-PWV to Evaluate Arterial Stiffness05:51

Measuring the Carotid to Femoral Pulse Wave Velocity Cf-PWV to Evaluate Arterial Stiffness

Published on: May 3, 2018

18.1K
Femoral Arterial and Venous Catheterization for Blood Sampling, Drug Administration and Conscious Blood Pressure and Heart Rate Measurements09:38

Femoral Arterial and Venous Catheterization for Blood Sampling, Drug Administration and Conscious Blood Pressure and Heart Rate Measurements

Published on: January 24, 2012

126.4K

Related Concept Videos

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

Direct Method
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...
2.8K
Sites for measruring blood pressure01:21

Sites for measruring blood pressure

Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
2.9K
Assessment of blood pressure in brachial artery(two-step method)01:23

Assessment of blood pressure in brachial artery(two-step method)

Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
1.2K
Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
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.
976
Measurement of Blood Pressure01:17

Measurement of Blood Pressure

Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
2.2K
Errors occurring during blood pressure monitoring01:25

Errors occurring during blood pressure monitoring

Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
Several factors...
1.2K