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:4/29/2016)... ... April 29, 2016 , ... A new study by a ... diaphragmatic hernia have better survival rates if surgery is performed early. Approximately one ... the diaphragm fails to form completely, letting abdominal organs into the chest cavity ...
(Date:4/29/2016)... ... 2016 , ... The Wharton School of the University ... of the 2016 Wharton Business Plan Competition —as well as the Wharton ... the Committee Award for Most ‘Wow Factor,’ making them the first team in ...
(Date:4/29/2016)... ... 29, 2016 , ... World Patent Marketing , a ... invention which aids in proper muscle development. , "The Gym & Exercise Equipment ... of World Patent Marketing. "Globalization has threatened the future growth of the industry ...
(Date:4/29/2016)... ... April 29, 2016 , ... Melanoma is the deadliest type of skin cancer. Although ... the majority of skin cancer deaths. More than 10,000 people are expected to die of ... is 62, it is the one of the most commonly diagnosed cancers in young women. ...
(Date:4/29/2016)... , ... April 29, 2016 , ... New York City based oral and maxillofacial surgeon ... is a very effective way to treat obstructive sleep apnea. Dr. Jamali is proud to ... is a procedure that involves one or both jaw bones. This surgery is performed to ...
Breaking Medicine News(10 mins):
(Date:4/28/2016)... India , April 28, 2016 ... Pipeline Review, H1 2016" is a report that ... and helps strengthen R&D pipelines by identifying new ... products. Company Profiles discussed in this ... Industrie Farmaceutiche Riunite Srl, AbbVie Inc., Abiogen Pharma ...
(Date:4/27/2016)... , April 27, 2016   ... 42% Growth in Recurring Consumable Sales  Clinical ... Mauna Kea Technologies (Euronext: MKEA, OTCQX: MKEAY) inventor of ... its sales for the first quarter ended March 31, ... the execution of its commercial strategy. First ...
(Date:4/27/2016)... April 27, 2016 Tie-up with ... initiative to save newborns   Fortis ... & newborns in collaboration with Breast Milk Foundation (BMF), a ... Pasteurized Human Milk Bank, ,Amaara, in Delhi-NCR today. This non-profit ... source for infants and should be available to babies deprived ...
Breaking Medicine Technology: