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Measurement of Blood Pressure

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...

Special considerations while measuring blood pressure

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.

Equipments Used To Measure Blood Pressure

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...

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

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...

Assessing Blood pressure using a doppler ultrasound

Assessing Blood pressure using a doppler ultrasound

To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:

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

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

This procedural guide systematically measures blood pressure using an oscillometric digital sphygmomanometer, emphasizing accuracy, patient safety, and comfort.
Prepare for the Procedure:

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Related Experiment Video

Updated: Aug 31, 2025

Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver

Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver

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Mathematical Modeling of Oscillometric Blood Pressure Measurement: A Complete, Reduced Oscillogram Model.

Vishaal Dhamotharan, Anand Chandrasekhar, Hao-Min Cheng

IEEE Transactions on Bio-Medical Engineering

|August 25, 2022

Summary

An optimal arterial compliance curve function was identified for oscillometric blood pressure (BP) measurement models. This exponential-linear function improves BP measurement accuracy and advances foundational knowledge.

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Area of Science:

Biomedical Engineering
Cardiovascular Physiology
Medical Instrumentation

Background:

Oscillogram modeling is crucial for understanding oscillometric blood pressure (BP) measurement.
A reduced oscillogram model relates cuff pressure oscillation amplitude to arterial pressure.
Determining the optimal arterial compliance curve is key to model accuracy.

Purpose of the Study:

To identify the optimal functional form for the arterial compliance curve within a reduced oscillogram model.
To enhance the accuracy of oscillometric blood pressure measurement.

Main Methods:

Compared eight prospective, three-parameter functions for brachial artery compliance.
Utilized oscillometric arm cuff pressure waveforms and invasive brachial BP data from 122 patients.
Fitted reduced oscillogram models with measured BP and compliance functions to oscillogram measurements using least squares.

Main Results:

An exponential-linear function provided model fits as good as or better than other functions.
This function demonstrated low errors (7.9±0.3% and 5.1±0.2%) for different oscillogram data treatments.
The exponential-linear function was found to be the most mathematically tractable.

Conclusions:

A three-parameter exponential-linear function is optimal for the arterial compliance curve in the reduced oscillogram model.
This function can serve as the standard for future oscillogram modeling.
The developed model has the potential to improve oscillometric BP measurement accuracy.