New model suggests cuffless, non-invasive blood pressure monitoring possible using pulse waves

October 16, 2018 by Bob Yirka, Medical Xpress report
New model suggests cuffless, non-invasive blood pressure monitoring possible using pulse waves
(A) Schematic diagram of pulse wave propagation in a human artery. (B and C) The cross-sectional dimensions of the artery (B) before and (C) after deformation due to the blood pressure. Credit: Proceedings of the National Academy of Sciences (2018). DOI: 10.1073/pnas.1814392115

A large team of researchers from several institutions in China and the U.S. has developed a model that suggests it should be possible to create a cuffless, non-invasive blood pressure monitor based on measuring pulse waves. In their paper published in Proceedings of the National Academy of Sciences, the group describes their model and how well it worked when tested on artificial blood vessels.

The current method of measuring human is to place a pressurized cuff on the patient's arm. This method does not allow for continuous monitoring, however—for that, a needle must be inserted into an artery. Scientists would like to have a device that is neither cuff- nor needle-based, but allows continuous blood monitoring. Such a device would allow for monitoring blood pressure during exercise or emotional situations. One promising means for creating such a device is based on the idea of measuring tiny pulse waves that propagate through blood vessels following each heartbeat. But such devices have not worked as hoped. The researchers with this new effort suggest the problem with such devices lies in the mathematical formulas that are used to interpret data from each pulse. They do not take into consideration the elastic nature of blood vessels, which means they do not account for the slight bulge that occurs as a pulse propagates. To address that problem, they have developed new formulas that account for the true nature of blood vessels.

The researchers tested their ideas by creating a device that sits lightly on the skin and monitors pulse waves—it continuously interprets what it reads and gives . They tested it using artificial and then by taking readings of human volunteers. They claim their prototype is far more accurate than prior attempts at creating such a device.

The team plans to continue development of their model, adding new algorithms to make their device even more accurate. They also plan to follow up their study by using their device to study pressure fluctuations non-invasively in patients residing in ICUs who are also connected to invasive monitors.

Explore further: Team suggests device for distant monitoring of blood pressure

More information: Yinji Ma et al. Relation between blood pressure and pulse wave velocity for human arteries, Proceedings of the National Academy of Sciences (2018). DOI: 10.1073/pnas.1814392115

Related Stories

Team suggests device for distant monitoring of blood pressure

March 31, 2017
Specialists from the Institute of Cyber Intelligence Systems and the Engineering centre (National Research Nuclear University MEPhI, Russia) have developed a device, which allows conduct distant daily monitoring of patient's ...

Wearable ultrasound patch monitors blood pressure deep inside body

September 12, 2018
A new wearable ultrasound patch that non-invasively monitors blood pressure in arteries deep beneath the skin could help people detect cardiovascular problems earlier on and with greater precision. In tests, the patch performed ...

Keeping tabs on hypertension

August 8, 2018
During his cardiovascular surgery training at Jackson Memorial Hospital in Miami in 2004, Mohan Thanikachalam recalls that at least once a week in the emergency room, he would see a patient in his early thirties or even late ...

Home blood pressure monitors inaccurate 70 percent of the time, study finds

June 7, 2017
Seventy per cent of readings from home blood pressure monitors are unacceptably inaccurate, which could cause serious implications for people who rely on them to make informed health decisions, new UAlberta research reveals.

Blood pressure check? There may soon be an app for that

March 7, 2018
Someday soon, a simple touch of a finger to a smartphone case might be enough to provide instant, accurate blood pressure readings.

New device approved for tears in heart's blood vessels

September 15, 2018
(HealthDay)—The PK Papyrus Covered Coronary Stent System has been approved by the U.S. Food and Drug Administration to treat acute coronary artery perforations, the medical term for tears in the heart's blood vessels.

Recommended for you

Study may offer doctors a more effective way to treat neuroblastoma

December 7, 2018
A very large team of researchers, mostly from multiple institutions across Germany, has found what might be a better way to treat patients with neuroblastoma, a type of cancer. In their paper published in the journal Science, ...

Increasing statins dose and patient adherence could save more lives

December 7, 2018
Thousands of heart attacks and deaths from cardiovascular disease could be prevented by patients taking higher doses of statins and taking the drugs as advised by doctors.

Progress made in transplanting pig hearts into baboons

December 6, 2018
A large team of researchers from several institutions in Germany, Sweden, Switzerland and the U.S. has transplanted pig hearts into baboons and kept them alive for an extended period of time. In their paper published in the ...

'Chemo brain' caused by malfunction in three types of brain cells, study finds

December 6, 2018
More than half of cancer survivors suffer from cognitive impairment from chemotherapy that lingers for months or years after the cancer is gone. In a new study explaining the cellular mechanisms behind this condition, scientists ...

Hybrid prevalence estimation: Method to improve intervention coverage estimations

December 6, 2018
LSTM's Professor Joseph Valadez is senior author on a new study published today in the Proceedings of the National Academy of Sciences, which outlines proposals for a more accurate estimator of health data.

Obesity ups survival in heart failure, but that's no reason to pile on pounds

December 6, 2018
(HealthDay)—Obese people with heart failure may live longer than those who are thinner—especially if they are "metabolically healthy," a new study suggests.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.