Monday, December 18, 2017
News

New device can help you take more accurate BP readings

   SocialTwist Tell-a-Friend    Print this Page   COMMENT

Washington D.C. [USA] | August 13, 2017 12:01:13 AM IST
 
A team of researchers has come up with a new device that could improve how systolic blood pressure (BP) is measured.

A systolic blood pressure measurement of 140 mmHg or higher and a diastolic measurement of 90 mmHG or higher (140/90 mmHg) is considered high. Blood pressure is usually assessed using either a manual (auscultatory) or automatic (oscillometry) meter in a doctor's office or hospital.

However, these measurements can be affected by "white coat syndrome"- a patient's fear or anxiety in a doctor's office causes their blood pressure to measure above normal levels.

To avoid the white coat effect, at-home automatic measurements taken by the patient may be required, but available oscillometry-based automatic meters offer a low level of accuracy.

"The automatic oscillometric technique is less accurate than the manual auscultatory technique, when both are used in the clinician's office," first author Meir Nitzan said. Currently available automatic blood pressure measurement devices are commonly off by 10 to 15 mmHg. This is mainly due to indirect determination of the blood pressure from the oscillometric air-pressure wave measurements taken by automatic devices.

A patient with an incorrect high blood pressure diagnosis may be prescribed blood pressure-lowering medication unnecessarily. These medications can cause patients' blood pressure to dip too low (hypotension); elderly patients are especially at risk.

Side effects of hypotension can include short-term symptoms such as dizziness and fainting and long-term problems such as insufficient blood supply to vital organs, which can lead to acute kidney injury and cognitive impairment.

The research team from the Jerusalem College of Technology and the Shaare Zedek Medical Center in Israel developed a device using a technique called photoplethysmography to more accurately measure systolic blood pressure. The device uses a pressure cuff wrapped around the arm and an electro-optic probe on the finger.

"The finger probe is similar to that of pulse oximeter: It includes a light-source emitting light into the finger and a detector, which measures the light transmitted through the finger," Nitzan explained. "The transmitted light exhibits pulses at the heart rate, due to cardiac-induced blood volume changes in the finger tissue. When the cuff pressure increases to above systolic blood pressure these pulses disappear, and when the cuff pressure decreases to below systolic blood pressure they reappear. This effect enables the determination of systolic blood pressure."

The study has been presented the Cardiovascular Aging: New Frontiers and Old Friends conference in Westminster, Colo. (ANI)

Watch News Videos

 
  LATEST COMMENTS ()
POST YOUR COMMENT
Comments Not Available
 
POST YOUR COMMENT
 
TRENDING TOPICS
 
 
 
CITY NEWS
MORE CITIES
 
MORE HEALTH NEWS
Hundreds sick with stomach illness on Ro...
Tips to fight male infertility...
New brittle bone test may be helpful in ...
This hearing aid can cure deafness: Rese...
48th Annual Congress of the Indian Socie...
Bipolar disorder has seven key character...
More...
 
INDIA WORLD ASIA
EC withdraws notice to Rahul Gandhi over...
Now, UP buses to have dustbins...
BJP will lose, if elections have been co...
Counting of votes begins in Gujarat, BJP...
Himachal Assembly polls: Counting of vot...
Vote count in Himachal begins...
More...    
 
 Top Stories
BJP ahead of Congress in Himachal (... 
Key Indian equity indices plunge on... 
BJP, Congress in neck and neck in G... 
Gujarat CM, Deputy CM trailing... 
BJP, Congress fight it out in Gujar... 
Not considering firing Mueller: Tru... 
EC chief assures no EVMs were tampe... 
BJP races ahead in Gujarat, confide...