Navigation Links
Secondhand smoke damages lungs, MRIs show
Date:11/26/2007

Its not a smoking gun, but its smoking-related, and its there in bright medical images: evidence of microscopic structural damage deep in the lungs, caused by secondhand cigarette smoke. For the first time, researchers have identified lung injury to nonsmokers that was long suspected, but not previously detectable with medical imaging tools.

The researchers suggest that their findings may strengthen public health efforts to restrict secondhand smoke.

We used a special type of magnetic resonance imaging to find these structural changes in the lungs, said study leader Chengbo Wang, Ph.D., a magnetic resonance physicist in the Department of Radiology at The Childrens Hospital of Philadelphia. Almost one-third of nonsmokers who had been exposed to secondhand cigarette smoke for a long time developed these structural changes. Formerly at the University of Virginia, Wang collaborated with radiology researchers at that institution, where they acquired the MRIs from adult smokers and nonsmokers.

Wang presented the teams findings in Chicago at the annual meeting of the Radiological Society of North America. Although the participants in the research study were adults, Wang said the results have implications for the 35 percent of American children who live in homes where regular smoking occurs.

The researchers studied 60 adults between ages 41 and 79, 45 of whom had never smoked. The 45 non-smokers were divided into groups with low and high exposure to secondhand smoke; the high-exposure subjects had lived with a smoker for at least 10 years, often during childhood. The 15 current or former smokers formed a positive control group.

The research team prepared an isotope of helium called helium-3 by polarizing it to make it more visible in the MRI. Researchers diluted the helium in nitrogen and had research subjects inhale the mixture. Unlike ordinary MRIs, this MRI machine measured diffusion, the movement of helium atoms, over 1.5 seconds. The helium atoms moved a greater distance than in the lungs of normal subjects, indicating the presence of holes and expanded spaces within the alveoli, tiny sacs within the lungs.

The researchers found that almost one-third of the non-smokers with high exposure to secondhand smoke had structural changes in their lungs similar to those found in the smokers. We interpreted those changes as early signs of lung damage, representing very mild forms of emphysema, said Wang. Emphysema, a lung disease that is a major cause of death in the U.S., is commonly found in heavy smokers.

The researchers also found a seemingly paradoxical result among two-thirds of the high-exposure group of non-smokersdiffusion measurements that were lower than those found in the low-exposure group. Although these findings require more study, said Wang, they may reflect a narrowing in airways caused by early stages of another lung disease, chronic bronchitis.

To our knowledge, this is the first imaging study to find lung damage in non-smokers heavily exposed to secondhand smoke, said Wang. We hope our work strengthens the efforts of legislators and policymakers to limit public exposure to secondhand smoke.


'/>"/>

Contact: Rachel Salis-Silverman
Salis@email.chop.edu
267-426-6063
Children's Hospital of Philadelphia  
Source:Eurekalert

Related medicine news :

1. Acting Surgeon General Announces National Initiatives to Protect Children by Reducing Exposure to Secondhand Smoke
2. Secondhand smoke increases teen test failure
3. Secondhand Smoke Hurts Kids Grades
4. Indiana Legislature Should Protect All Workers from Secondhand Smoke
5. Novel MRI technique shows secondhand smoke damages lungs
6. Another Reason Not to Smoke While Pregnant: Birth Defects
7. Teens who see more smoking in movies may have increased risk of becoming established smokers
8. Smokers More Likely to Develop Dementia
9. Fresh Air Campaign to Showcase Minnesotans Love of Smoke-Free Air
10. Health and Business Groups Launch Ad Campaign About Need for Comprehensive Smoke-Free Law in Pennsylvania
11. Penn School of Medicine receives $2.3 million to study biomarkers of cigarette smoke exposure
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Secondhand smoke damages lungs, MRIs show
(Date:3/29/2017)... ... March 29, 2017 , ... Altima Technologies, ... diagramming network and data center assets and audio-video devices has recently updated its ... equipment shapes for free and download shapes and stencils from http://www.VisioStencils.com. ...
(Date:3/29/2017)... Ca (PRWEB) , ... March 29, 2017 , ... Immunotherapy ... a growing number of cancers and is touted to be the next revolution in ... thus far, has been in the form of immune checkpoint inhibitors such as PD-1 ...
(Date:3/29/2017)... ... March 29, 2017 , ... AvePoint , the Microsoft Cloud expert, is ... Richmond, Virginia, located at the Riverfront Plaza, 901 East Byrd Street. AvePoint is celebrating ... Ralph S. Northam and Mayor of Richmond Levar M. Stoney. , Founded in 2001, ...
(Date:3/28/2017)... ... March 28, 2017 , ... India’s Chigurupati Technologies ... directly address the resolution to globally reduce the harmful use of alcohol set ... FDA and TTB approved ingredients that when infused into alcohol, renders the alcohol ...
(Date:3/28/2017)... ... ... Isabella Wentz, PharmD, FASCP, one of the leading thyroid experts of the world, is ... about journey and research recently on a blog and discussed some major aspects of ... deal with thyroid disease. , Dr. Wentz completed her graduation from the Midwestern ...
Breaking Medicine News(10 mins):
(Date:3/29/2017)... FRANCISCO , March 29, 2017  Spiral ... option agreement with Bionure Farma, S.L. for the ... and to BN119 in the field of otolaryngology ... plus sales-based royalties. The agreement provides Spiral ... assets with a differentiated product profile. Under the ...
(Date:3/29/2017)... , USA, March 29, 2017 Stryker ... that Cares by People magazine, in partnership with Great ... 50 companies on the list. This list highlights the ... have succeeded in business while also demonstrating respect, compassion ... environment.  To determine the companies on ...
(Date:3/29/2017)... YORK , March 29, 2017 FinancialBuzz.com News ... Data published in a ... cannabis market will reach a value of USD 55.8 billion by 2025. ... the United States and a more open approach towards ... , Florida , North Dakota ...
Breaking Medicine Technology: