Ms. Naomi Nacasch Profile

Naomi Nacasch

at Meir Medical Ctr

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 22 July 2019 Paper

Novel method for non-invasive blood pressure measurement from the finger using an optical system based on dynamic light scattering

Adi Schejter Bar-Noam, Alexander Kaminsky, Albert Bravo, Louis Shenkman, Naomi Nacasch, Ilya Fine

Proceedings Volume 11075, 110750P (2019) https://doi.org/10.1117/12.2525685

KEYWORDS: Blood pressure, Blood circulation, Dynamic light scattering, Hemodynamics, Sensors, Signal detection, Measurement devices

Read Abstract +

Self-measurement of blood pressure (BP) is important for monitoring treatment of hypertension, but current instruments are cumbersome and at times also impractical, especially for the older population. Current optical solutions, such as PPG-based technologies that were developed for improving convenience, provide derived measurements that are often inaccurate, particularly for diastolic values. Alternatively, by using dynamic light scattering (DLS) we are able to measure the direct hemodynamic response. We propose a simple physical model that explains the relation between arterial pressure values and the hemodynamic response which is measured from the finger root following changes in externally applied pressure. Based on this model we have developed a small-scaled, optical, mobile device that measures BP at the finger using dynamic light scattering. The apparatus is positioned at the base of the index finger and contains a ring with an inflatable cuff with two miniaturized dynamic light scattering (mDLS) sensors situated distal to the cuff. The cuff is inflated to above systolic pressure, and changes in blood flow (hemodynamics) are measured during cuff deflation. BP measurement is carried out using specially designed algorithms based on hemodynamic indexes and waveform analysis which capture systolic and diastolic points in real-time. Using this apparatus, we measured BP from 69 patients visiting a hypertension outpatient clinic, and a control group of 15 healthy subjects. BP readings were compared with measurements recorded at the arm location with an Omron device used in the clinic. The mean absolute error (MAE) for systolic and diastolic blood pressure was 7.8 and 9 mmHg, respectively at all ranges of BP measured. In conclusion, using Elfi-Tech's innovative technology, it is possible to measure BP accurately at the finger location using a compact, convenient mDLS-based device with high accuracy.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years