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Pressure Gauges

Pressure Gauges

Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...

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...

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:

Measurement of Fluid Pressure

Measurement of Fluid Pressure

Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...

Sites for measuring blood pressure

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

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Related Experiment Video

Updated: Jul 10, 2026

A Novel Non-invasive Method for the Detection of Elevated Intra-compartmental Pressures of the Leg

A Novel Non-invasive Method for the Detection of Elevated Intra-compartmental Pressures of the Leg

Published on: May 31, 2019

Portable gage for pressure ulcer detection.

Qi Wang¹, Linghua Kong, Stephen Sprigle

¹Dept. of Electr. & Comput. Eng., McGill Univ., Canada. qiwang@cim.mcgill.ca

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference

|October 20, 2007

Summary

A new handheld device accurately measures skin biomechanical properties to detect early-stage pressure ulcers and deep tissue injury, aiding in prevention and reducing healthcare costs.

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Last Updated: Jul 10, 2026

A Novel Non-invasive Method for the Detection of Elevated Intra-compartmental Pressures of the Leg

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Published on: May 31, 2019

Development of a Benchtop Model for Evaluating the Compatibility of Wound Dressing Materials with Negative Pressure Wound Therapy Systems

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Published on: May 2, 2025

A Protocol of Manual Tests to Measure Sensation and Pain in Humans

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Published on: December 19, 2016

Area of Science:

Biomedical Engineering
Dermatology
Rehabilitation Medicine

Background:

Pressure ulcers pose a significant challenge in rehabilitation, causing patient discomfort and escalating healthcare expenses.
Effective prevention strategies are crucial for nursing teams to mitigate the incidence of pressure ulcers.

Purpose of the Study:

To introduce a novel handheld instrument for detecting subtle changes in skin biomechanical properties.
To enable early detection of stage-I pressure ulcers and deep tissue injury.

Main Methods:

Development of a portable, inexpensive, and precise handheld instrument.
Measurement of the skin's biomechanical response under a wide range of conditions using high bandwidth loading.
Validation through experimental testing on human skin.

Main Results:

The instrument demonstrated the ability to effectively measure differences in skin viscoelasticity across various body sites.
Preliminary findings support the device's potential for early detection of pressure-related tissue damage.

Conclusions:

The developed instrument shows promise for the early detection of pressure ulcers and deep tissue injury.
This technology could facilitate the establishment of clinical protocols and trials for pressure ulcer prevention.