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PhysBP

A compact, low-cost and portable device to dive into the physics of arterial oscillations and blood pressure.

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The PhysBP is compact device to measure the blood pressure and arterial oscillations. The setup is compact, portable and ideal to show case the phenomena behind the arterial oscillations due to movement of blood from heart to body parts through blood vessels, and to untie the knot of effect of internal and external pressure change.

It comprises of two pressure sensors: One is pre-calibrated called PhysBar to measure the cuff pressure with time and is interfaced with a circuit that cleans the signal and produces a digital signal that is read by the PhysLogger. The other analog pressure sensor to measure the arterial oscillations after filtering with time. Both the data can be seen in real time to visualize the effect of external pressure on artery pressure. The setup is integrated with our PhysLogger, a data logger with easy plug and play method. The PhysLogger is compatible with our own software PhysLogger Desktop to inspect the data in real time and to save the data for further analysis in some other platform.

Research and Education

Qosain Scientific’s PhysBP is a comprehensive and low cost device for research and education for students, researchers and teachers. It is compact and portable tool designed not to see the Systolic and Diastolic pressure but also the key insights of external (cuff) and internal (arterial) pressure. It is great tool to teach students, researchers and the teachers itself, the physics behind the pressure in arteries due to heart pumping in the form of real time signals using PhysLogger through PhysLogger Desktop.

The graph shows: (top) pressure in cuff through PhysBar and (bottom) filtered data to see the arterial oscillations over the cuff inflation till180 torr pressure and then complete deflation.

The PhysBP can help to visualize how the increase in external pressure in cuff effect the arterial oscillations due to heart beat. For this the pressure in cuff can be increased such that it minimize the oscillations in filtered data due to heart beat by not exceeding the safe pressure range, is shown below on left. Similarly, during deflation as the internal pressure become comparable to external, the arterial oscillations starts to appear again, is shown below on right.

 

 

 

 

 

These oscillations are in voltage and can be calibrated into pressure form to see the impact of cuff pressure on amplitude of pressure of arterial oscillations. This further can help in exploring the insights of heart beat, blood flow and oscillations of blood vessel.

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