Navigation Links
Astronauts on International Space Station lose alarming amounts of hipbone strength
Date:1/26/2009

Irvine, Calif., Jan. 26, 2009 Astronauts spending months in space lose significant bone strength, making them increasingly at risk for fractures later in life.

UC Irvine and UC San Francisco led a study evaluating 13 astronauts who spent four to six months on the International Space Station and found that, on average, astronauts' hipbone strength decreased 14 percent. Three astronauts experienced losses of 20 percent to 30 percent, rates comparable to those seen in older women with osteoporosis.

These results alarmed researchers because they revealed a greater rate of bone deterioration than previously measured using less powerful technologies.

"If preventive measures are not taken, some of our astronauts may be at increased risk for age-related fractures decades after their missions," said study leader Joyce Keyak, UCI orthopedic surgery and biomedical engineering professor.

For as long as there have been astronauts, researchers have studied why the microgravitational environment of space makes bones more fragile. While previous studies looked at bone mineral density, this study is the first to specifically evaluate bone strength.

Keyak and her colleagues used a novel computer program she developed over the past 20 years to identify hipbone fracture risk in people with osteoporosis. The study team used this program to analyze structurally the hipbone CT scans of one female and 12 male International Space Center crewmembers.

The decrease in bone strength measured between 0.6 percent and 5.0 percent for each month of service on the station, Keyak said, which was noticeably greater than monthly reductions in bone mineral density of 0.4 percent to 1.8 percent observed in previous studies on the same subjects.

Orthopedic researchers looking into the effects of long-duration spaceflight usually study the hipbone or spine. The hip experiences the greatest rate of bone loss in space, and a hip fracture almost always requires hospitalization and major surgery. It can impair a person's ability to walk unassisted and may cause prolonged or permanent disability or even death. Fractures of the vertebra also have serious consequences, including loss of height, severe back pain and deformity.


'/>"/>

Contact: Tom Vasich
tmvasich@uci.edu
949-824-6455
University of California - Irvine
Source:Eurekalert

Related medicine news :

1. Why do astronauts suffer from space sickness?
2. Space Radiation a Risk for Astronauts
3. Microscopic astronauts to go back in orbit
4. NASA Astronauts, Exercise Exhibit To Be At Houston Marathon Events
5. Exercise May Help Female Astronauts Stay Strong
6. Lifeclinic International Achieves ISO 13485:2003
7. ORBIS International Receives Donated PASCAL(R) Photocoagulator From OptiMedica
8. Saint Josephs Launches International College of Robotic Surgery
9. International Medical Corps and Agility Logistics Partner to Enhance Delivery of Humanitarian Relief
10. FRC Condemns President Obamas $441 Million Bailout of International Abortions
11. After Eight Years of Injustice, International Family Planning Funding is Restored
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... June 25, 2016 , ... As a lifelong Southern Californian, Dr. Omkar Marathe ... from the David Geffen School of Medicine at UCLA. He trained in Internal Medicine ... his fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had the ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the benefits of moderation, whether ... latter, setting the bar too high can result in disappointment, perhaps even self-loathing. However, ... their goal. , Research from PsychTests.com reveals that behind the tendency ...
(Date:6/24/2016)... , ... June 24, 2016 , ... June 19, 2016 ... dangers associated with chronic pain and the benefits of holistic treatments, Serenity Recovery ... are suffering with Sickle Cell Disease. , Sickle Cell Disease (SCD) is a disorder ...
(Date:6/24/2016)... Fla. (PRWEB) , ... June 24, 2016 , ... Global ... Trend magazine’s 2016 Legal Elite. The attorneys chosen by their peers for this recognition ... Florida. , Seven Greenberg Traurig Shareholders received special honors as members of this year’s ...
(Date:6/24/2016)... ... 2016 , ... Topical BioMedics, Inc, makers of Topricin and MyPainAway Pain Relief Products, join The ... raise to $12 an hour by 2020 and then adjusting it yearly to increase at ... the minimum wage, assure the wage floor does not erode again, and make future increases ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... 27, 2016  VMS Rehab Systems, Inc. ( www.vmsrehabsystemsinc.com ... whatever measures required to build a strong and stable ... currently listed on the OTC Markets-pink current trading platform. ... CEO, "We are seeing an anomaly in market trading ... only by the Company, but shareholders and market players ...
(Date:6/24/2016)... , June 24, 2016  Consumers have ... and regulators/payers have placed more emphasis on patient ... patient support programs in the pharmaceutical industry have ... medications. Consequently, pharmaceutical companies are focusing on becoming ... are providing products and services that improve health. ...
(Date:6/24/2016)... , June 24, 2016  Global Blood ... biopharmaceutical company developing novel therapeutics for the treatment ... today announced the closing of its previously announced ... stock, at the public offering price of $18.75 ... offering were offered by GBT. GBT estimates net ...
Breaking Medicine Technology: