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research-article

A novel modular tonometry based device to measure pulse pressure waveforms in Radial Artery

[+] Author and Article Information
Mohammad Ikbal Choudhury

Department of Applied Mechanics, Indian Institute of Technology Delhi, Block 4, Academic Building
ikbal.choudhury.nits@gmail.com

Pranjal Singh

Department of Applied Mechanics, Indian Institute of Technology Delhi, Block 4, Academic Building
pranjalnewton@gmail.com

Rajnish Juneja

Department of Cardiology, All India Institute of Medical Science, Neurosurgery and Cardiac Surgery Building
rjuneja2@gmail.com

Suneet Tuli

Center for Applied Research in Electronics, Indian Institute of Technology Delhi, Block 3, Academic Building
suneet@care.iitd.ac.in

Kishore K Deepak

Head, Department of Physiology, All India Institute of Medical Science, New Delhi
kkdeepak@gmail.com

Anamika Prasad

Mechanical Engineering Department, South Dakota State University
anamika.prasad@sdstate.edu

Sitikantha Roy

Department of Applied Mechanics, Indian Institute of Technology Delhi, Block 4, Academic Building
sroy@am.iitd.ac.in

1Corresponding author.

ASME doi:10.1115/1.4039010 History: Received February 10, 2017; Revised December 14, 2017

Abstract

The paper presents development of a new device for measurement of continuous pulse pressure waveforms from the radial artery via applanation tonometry. The device design parameters are optimized through an extensive tissue device interaction study based on detailed computational model. The design incorporates modular components, and includes a sensor module for arterial flattening and pressure pick-up, a differential screw mechanism and related algorithm for controlled stepwise motion and data collection during flattening, and a wrist brace for hand flexion adjustment. The pressure waveforms collected using the device are validated against established products in the market (Collin's tonometer and standard spygomomanometer). Thus, the simple and well-validated mechanical design of the device which can be incorporated via rapid fabrication technique makes the form factor of the device affordable, yet robust and reliable as compared to other established devices in the market.

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