Featured Research

from universities, journals, and other organizations

Nasal Cannula May Be Viable Treatment For Sufferers Of Sleep Apnea

Date:
July 19, 2007
Source:
American Thoracic Society
Summary:
Researchers have found that symptoms in patients with obstructive sleep apnea and hypopnea can be significantly reduced through treatment with nasal insufflation, using a nasal cannula to deliver warm, humidified air at a high flow rate.

Researchers at Johns Hopkins University have found that symptoms in patients with obstructive sleep apnea and hypopnea can be significantly reduced through treatment with nasal insufflation (TNI), using a nasal cannula to deliver warm, humidified air at a high flow rate.

Related Articles


"Our findings provide evidence that TNI may offer a viable treatment alternative to patients with obstructive hypopneas and apneas," said lead researcher Hartmut Schneider, M.D., of Johns Hopkins Asthma and Allergy Center.

The proof of concept study included 11 patients with mild to severe apnea-hypopnea disorders, who were selected to provide a balanced range of disease severity. Apnea was defined as complete cessation of airflow for more than 10 seconds. Hypopnea was defined as a greater than 30 percent reduction of airflow.

After baseline data were established for each patient while undergoing TNI at 0, 10 and 20L/minute, subjects were randomized to receive either no treatment or treatment with TNI at 20L/minute on separate nights. Researchers then measured airflow and superglottic pressure and monitored body position, sleep arousals and respiratory events.

At TNI of 10L/minute, some indications of disordered breathing showed improvement, but airflow limitations and snoring persisted. However, at TNI of 20L/minute, all patients showed a marked improvement. "When TNI was administered, sleep and breathing patterns stabilized," said Dr. Schneider.

Furthermore, the results showed that even patients with more severe disorders gained significantly from TNI. "Although we expected marked improvements in the apnea-plus-hypopnea index (AHI) primarily in patients with hypopneas rather than obstructive apneas, TNI lowered the AHI in all subjects," the researchers wrote.

These findings suggest that TNI may be a more viable treatment option for patients with hypopnea and sleep apnea. "Current treatment options...are often intrusive or invasive and not well-tolerated, leaving a vast number of patients untreated," said Dr. Schneider. "Improved therapeutic strategies are required to treat sleep apneas and hypopneas and their associated morbidity and mortality."

Sleep apnea affects more than 12 million Americans, according to the National Institutes of Health, and is especially prevalent in overweight or obese individuals. Many more have the milder form of sleep-associated respiratory disorders, hypopnea. Untreated sleep apnea can increase the chance of having high blood pressure and risk of heart attack, stroke and diabetes, as well as putting patients at risk for work-related accidents and driving accidents.

"At present, CPAP [continuous positive airway pressure] is most effective at eliminating apneas and hypopneas, [but] long-term effectiveness is compromised by low adherence," wrote the researchers. "We developed a simplified method for increasing pharyngeal pressure by delivering warm and humidified air at a continuous high flow rate through the open nasal cannula."

While patients with severe sleep apneas may be more highly motivated to adhere to treatment with CPAP or surgery, younger, thinner and healthier patients with milder disorders may find the TNI approach appealing, according to Dr. Safwan Badr, chief of pulmonary, critical care and sleep medicine at Haper University Hospital in Detroit and chair of the American Thoracic Society's Assembly on Respiratory Neurobiology and Sleep.

The authors noted that the minimally intrusive nasal interface of TNI may improve patient adherence, and may ultimately prove more effective at managing long-term morbidity and mortality of sleep apnea." Furthermore, the fact that one flow rate and one cannula size were sufficient to stabilize breathing patterns in the majority of subjects suggests that titration of TNI may be unnecessary, streamlining the initiation of treatment.

The present study is a proof of concept, the authors wrote, and will require replication in clinical trials. However, the study represents the first step in developing a new potential alternative to current sleep apnea treatments that may lower the barrier for care in patients with sleep-associated breathing disorders.

The research was reported in the second issue for July 2007 of the American Journal of Respiratory and Critical Care Medicine published by the American Thoracic Society.


Story Source:

The above story is based on materials provided by American Thoracic Society. Note: Materials may be edited for content and length.


Cite This Page:

American Thoracic Society. "Nasal Cannula May Be Viable Treatment For Sufferers Of Sleep Apnea." ScienceDaily. ScienceDaily, 19 July 2007. <www.sciencedaily.com/releases/2007/07/070716132719.htm>.
American Thoracic Society. (2007, July 19). Nasal Cannula May Be Viable Treatment For Sufferers Of Sleep Apnea. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2007/07/070716132719.htm
American Thoracic Society. "Nasal Cannula May Be Viable Treatment For Sufferers Of Sleep Apnea." ScienceDaily. www.sciencedaily.com/releases/2007/07/070716132719.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Mind & Brain News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Reuters - Innovations Video Online (Dec. 22, 2014) Cambridge scientists have unravelled the genetic code of a rare tapeworm that lived inside a patient's brain for at least four year. Researchers hope it will present new opportunities to diagnose and treat this invasive parasite. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Buzz60 (Dec. 19, 2014) A double-amputee makes history by becoming the first person to wear and operate two prosthetic arms using only his mind. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Prenatal Exposure To Pollution Might Increase Autism Risk

Prenatal Exposure To Pollution Might Increase Autism Risk

Newsy (Dec. 18, 2014) Harvard researchers found children whose mothers were exposed to high pollution levels in the third trimester were twice as likely to develop autism. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins