Navigation Links
High-altitude climbs may cause corneal swelling, but do not appear to affect vision
Date:2/8/2010

Swelling commonly occurs in the corneas of mountain climbers, but does not appear to affect vision at altitudes of up to 6,300 meters (about 20,670 feet), according to a report in the February issue of Archives of Ophthalmology, one of the JAMA/Archives journals.

"High-altitude mountaineering is a popular recreational sport among healthy lowlanders," the authors write as background information in the article. "As a consequence of the exposure to hypobaric atmospheric conditions with a consecutive decrease in oxygen saturation, high-altitude climbing may lead to acute mountain sickness and the rare but potentially fatal high-altitude cerebral edema." Changes to the cornea, the transparent membrane covering the front of the eye, also occur during high-altitude climbs and may cause potentially hazardous vision loss.

Martina Monika Bosch, M.D., of University Hospital Zurich, Switzerland, and colleagues studied the effects of high-altitude climbing on corneal thickness among 28 healthy volunteers climbing Mount Muztagh Ata in western China. The mountaineers were randomly assigned to two different ascending paths, with one group being allotted a shorter time to acclimate before ascending to 6,265 meters. Corneal thickness, visual acuity and blood oxygen levels were measured in climbers before, during and after their ascent, and symptoms of acute mountain sickness were also assessed.

In groups with both patterns of ascent, corneal thickness increased with increasing altitude and decreased after descent, and the amount of decrease in blood oxygen levels paralleled this increase. The group with the shorter acclimatization time experienced a greater increase in corneal thickness. However, no significant decrease in visual acuity was observed in either group.

When controlling for age and oxygen saturation, there was a correlation between symptoms of mountain sickness and corneal thickness. This was possibly due to these individua
'/>"/>

Contact: Martina Monika Bosch, M.D.
martina.boesch@usz.ch
JAMA and Archives Journals
Source:Eurekalert

Page: 1 2

Related medicine news :

1. VivoMetrics LifeShirt Going to South Pole to Uncover Clues to High-Altitude Illness
2. Amilpar - Revenues Increase by 26.5% and Adjusted Net Income Climbs 28.7% in 2008
3. James Chippendale Climbs the Mountain of Life
4. Doctors miss major cause of infertility and obesity
5. Herbal Remedies Can Cause Cardiac Problems
6. No Surprise to David Perecman And Other Personal Injury Attorneys, Vehicles Lead All Causes of Injury at New York Hospital
7. Mental illnesses are second leading cause of time off work in Spain
8. Tobacco Toxin Helps a Protein Cause Lung Cancer
9. How sunlight causes skin cells to turn cancerous
10. Evolving Strains of HIV May Cause Wave of Drug Resistance
11. American Lung Association Report Card: Federal Government Makes Major Strides; Most States Flunk for Neglecting to Prevent Tobacco-Caused Disease
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... Rochelle, NY, April 17, 2014U.S. military personnel who ... plus impact" concussive traumatic brain injury (TBI) were ... evacuated for other medical reasons. Differences in measures ... depression 6-12 months after injury are reported in ... a peer-reviewed journal from Mary Ann Liebert, Inc., ...
(Date:4/17/2014)... The cause of neuronal death in Parkinson,s disease ... neurons may be mistaken for foreign invaders and killed ... way autoimmune diseases like type I diabetes, celiac disease, ... was published April 16, 2014, in Nature Communications ... idea in Parkinson,s disease; but if true, it could ...
(Date:4/17/2014)... from Boston University School of Medicine (BUSM) have ... consumption in an experimental model. The findings, reported ... Alcohol Abuse , may lead to more effective ... is one of the leading causes of illness ... negative economic impact by limiting the productivity of ...
(Date:4/17/2014)... Spending time online has the potential to ward off ... according to research published online in The ... Sciences . In the article " Internet Use ... States: A Longitudinal Analysis ," the authors report that ... by 33 percent among their study sample. , ...
(Date:4/17/2014)... uncommon these days to find a colored ribbon representing a ... cancer. But what color ribbon does one think of with ... color, for many suffering from the disease, black may be ... study consisting of lung cancer patients, primarily smokers between the ... light on the stigma often felt by these patients, the ...
Breaking Medicine News(10 mins):Health News:Long-term effects of battle-related 'blast plus impact' concussive TBI in US military 2Health News:Is Parkinson's an autoimmune disease? 2Health News:BUSM researchers find anti-seizure drug may reduce alcohol consumption 2Health News:Internet use may cut retirees' depression 2Health News:Unraveling the 'black ribbon' around lung cancer 2
... Oxygen", as it is known by researchers at the Norwegian ... is gained on the pitch thanks to their new system ... the Journal of Sports Medicine and has enjoyed ... improve the players, sprint, jump and endurance. , "With ...
... near manufacturing industries, a breath of air may ... location, finds a recent study involving a Kansas ... of geology at Kansas State University, along with ... School of Public Health and Department of Environmental ...
... Measurement of pressure within the eye, or intraocular pressure (IOP), ... in patients with glaucoma are believed to be related to ... to the optic nerve and vision. The clinical assessment ... daytime hours. In a new study, parents using the ...
... Steven Reinberg HealthDay Reporter , TUESDAY, March ... who have psychiatric disorders, especially post-traumatic stress disorder, are ... narcotic painkillers, a new study finds. Use of ... Vicodin, can become addictive and cause more serious problems, ...
... (HealthDay News) -- Most stroke patients undergo both CT and ... rising costs of stroke care in the United States, a ... from more than 600,000 patients diagnosed with stroke between 1999 ... of the patients who had MRI scans also had CT ...
... (HealthDay News) -- When it comes to wine, a new study ... on many consumers. The professionals seem to have a much ... State University explained. As a result, wine experts are able to ... people just can,t taste. "What we found is that the ...
Cached Medicine News:Health News:1 more 'player' on the pitch thanks to a new training method 2Health News:Manganese concentrations higher in residential neighborhoods than industrial sites, varies by region 2Health News:Manganese concentrations higher in residential neighborhoods than industrial sites, varies by region 3Health News:Home measurement of eye pressure in children may improve management of glaucoma 2Health News:Narcotic Painkillers Another Threat to Traumatized War Vets: Study 2Health News:Narcotic Painkillers Another Threat to Traumatized War Vets: Study 3Health News:Brain Scans Overused on U.S. Stroke Patients, Study Says 2Health News:Wine Ratings May Be Meaningless for Most People 2
(Date:1/15/2014)...  Research and Markets ( http://www.researchandmarkets.com/research/6k27gw/dental ) has announced the ... Industry Analysis, Size, Share, Growth, Trends And Forecast, 2013 ... (Logo: http://photos.prnewswire.com/prnh/20130307/600769 ) ... in order to treat dental impairments, for tooth restoration ...
(Date:1/15/2014)... WASHINGTON , Jan. 15, 2014 AARP Foundation today ... support older adults suffering from the severe cold weather that ... are committed to helping those in need; so to support ... dollar-for-dollar contributions up to $250,000, which could mean up to ...
(Date:1/15/2014)... , Jan. 15, 2014  Celsion Corporation (the "Company") (NASDAQ: ... commitments from institutional investors to purchase an aggregate of ... an at-the-market registered direct offering, led by a dedicated ... definitive purchase agreements with these investors pursuant to which ...
Breaking Medicine Technology:Dental Consumables Market - Global Industry Analysis, Size, Share, Growth, Trends And Forecast, 2013 - 2018 2Dental Consumables Market - Global Industry Analysis, Size, Share, Growth, Trends And Forecast, 2013 - 2018 3AARP Foundation Establishes Winter Relief Fund for Older Adults Suffering from the Severe Cold Weather 2AARP Foundation Establishes Winter Relief Fund for Older Adults Suffering from the Severe Cold Weather 3Celsion Corporation Announces $15 Million At-The-Market Registered Direct Offering 2Celsion Corporation Announces $15 Million At-The-Market Registered Direct Offering 3
... June 22, 2007 /PRNewswire/ -- MAP,Pharmaceuticals, Inc. today ... its Unit Dose Budesonide (UDB) pediatric asthma therapy,clinical ... Lutfi Kirdar,Convention and Exhibition Center in Istanbul, Turkey. ... and safety,of a novel submicron particle formulation of ...
... Announces Bioinformatics Partnership with,Illumina , BEYOND GENOME ... a leading developer of lab and data ... announced that,it has penned an agreement with ... participant in IlluminaConnect, a,bioinformatics software program established ...
Cached Medicine Technology:MAP Pharmaceuticals to Present Unit Dose Budesonide Phase 2,Clinical Data at the World Asthma Meeting 2GenoLogics Announces Bioinformatics Partnership with Illumina 2GenoLogics Announces Bioinformatics Partnership with Illumina 3
Features soft, low friction sheath that extends beyond the tip....
Designed to retain the desired curve during oral intubation....
Facilitates intubation of tracheal tubes....
SunGlide™ Stylette - Grey Child. Use in 4.0 to 7mm tubes. 25/box....
Medicine Products: