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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...
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...
Sites for measuring blood pressure01:21

Sites for measuring 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
Assessment of blood pressure in brachial artery(one-step method)01:15

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:
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.
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 stethoscope.

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Related Experiment Video

Updated: Jun 6, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

Alternatives to the mercury sphygmomanometer.

Susan Buchanan1, Peter Orris, Joshua Karliner

  • 1Environmental and Occupational Health Sciences Division, University of Illinois at Chicago School of Public Health, 835 S. Wolcott, Suite E-144, MC 684, Chicago, Illinois 60612, USA. sbucha3@uic.edu

Journal of Public Health Policy
|November 27, 2010
PubMed
Summary

Mercury sphygmomanometers are most accurate but can fail calibration. Alternative blood pressure devices vary in accuracy and require regular calibration and validation for reliable patient monitoring.

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Area of Science:

  • Medical Devices
  • Clinical Measurement
  • Public Health

Background:

  • Mercury sphygmomanometers have been used for over a century.
  • Mercury is a known neurotoxin, prompting global efforts to replace mercury-containing medical devices.
  • Concerns exist regarding the accuracy of mercury-free alternatives for blood pressure measurement.

Purpose of the Study:

  • To review and evaluate the accuracy of mercury, aneroid, and oscillometric blood pressure devices.
  • To compare the performance of different blood pressure measurement technologies based on existing literature.

Main Methods:

  • A literature review was conducted on studies published between 1995 and 2009.
  • The review focused on articles assessing the accuracy of mercury, aneroid, and oscillometric sphygmomanometers.

Main Results:

  • Mercury sphygmomanometers demonstrated the best performance but still failed calibration tests (1-28%).
  • Aneroid sphygmomanometers showed higher failure rates (up to 61%), though recently calibrated devices performed well.
  • Oscillometric devices had variable performance and were less extensively studied.

Conclusions:

  • All evaluated blood pressure devices exhibited variable accuracy.
  • Validation before purchase and regular calibration are crucial for all blood pressure monitoring devices.
  • Ensuring accurate blood pressure measurement is vital for effective patient care and treatment.