Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Nighttime breathing mask decreases blood pressure in people with sleep apnea

23.05.2006


Patients with the nighttime breathing disorder known as obstructive sleep apnea who receive air through a mask while they sleep can significantly reduce their blood pressure, according to a study to be presented at the American Thoracic Society International Conference on May 22nd.



"Sleep apnea can have significant consequences on a person’s physical health, and this study shows once again that treatment may lessen those risks," said lead researcher Daniel Norman, M.D., Fellow in Pulmonary and Critical Care at the University of California San Diego Medical Center.

In obstructive sleep apnea, the upper airway narrows, or collapses, during sleep. Periods of apnea end with a brief partial arousal that may disrupt sleep hundreds of times a night. More than half of those with sleep apnea also have high blood pressure, and their blood pressure does not fall during sleep as it does in most people.


The most widely used treatment for sleep apnea is a technique called nasal CPAP, for continuous positive airway pressure, which delivers air through a mask while the patient sleeps. It has proved successful in many cases in providing a good night’s sleep and preventing daytime accidents due to sleepiness. Supplementary oxygen is sometimes used as a treatment for sleep apnea.

The researchers studied 46 patients with moderate to severe sleep apnea. They were randomly assigned to receive either CPAP treatment, fake CPAP or supplemental nighttime oxygen through a face mask. All patients were hooked up to a 24-hour ambulatory blood pressure monitor, which consists of a small machine strapped to the patient’s torso that attaches to an arm cuff. The cuff automatically inflates and deflates to measure patients’ blood pressure.

After two weeks, patients who received the real CPAP treatment had significant reductions in blood pressure during the day and night. Nighttime oxygen therapy did not affect blood pressure.

"There has been some controversy over how sleep apnea causes elevated blood pressure," Dr. Norman said. "Doctors don’t know if it is due to drops in oxygen levels or arousals from sleep. Our study indicated that correcting drops in oxygen levels alone may not be enough to reduce blood pressure."

Jim Augustine | EurekAlert!
Further information:
http://www.earthlink.net
http://www.thoracic.org/

More articles from Health and Medicine:

nachricht On track to heal leukaemia
18.01.2017 | Universitätsspital Bern

nachricht Penn vet research identifies new target for taming Ebola
12.01.2017 | University of Pennsylvania

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

A big nano boost for solar cells

18.01.2017 | Power and Electrical Engineering

Glass's off-kilter harmonies

18.01.2017 | Materials Sciences

Toward a 'smart' patch that automatically delivers insulin when needed

18.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>