Study: Brief Secondhand Smoke Exposure Can Be Hazardous

A 30-minute exposure to the level of secondhand smoke that one might normally inhale in an average bar setting was enough to result in blood vessel injury in young and otherwise healthy lifelong nonsmokers, according to researchers at the University of California, San Francisco. Compounding the injury to the blood vessels themselves, the exposure to smoke impedes the function of the body's natural repair mechanisms that are activated in the face of the blood vessels' injury, the researchers report. Many of these effects persisted 24 hours later.

Study findings are reported in the online edition of the Journal of the American College of Cardiology, appear in the journal's May 6 print issue.

The researchers said their results showed that brief exposure to real-world levels of passive smoke have strong and persistent consequences on the body's vascular system, the researchers conclude.

For the study, subjects were exposed to carefully controlled levels of secondhand smoke in a research setting. The smoke was equivalent to being in a bar where smoking is allowed -- as it still is for 51 percent of the U.S. population and in other countries, such as Germany -- for 30 minutes. As a control, the same subjects were exposed to clean air on a different day.

In both settings, the researchers evaluated the subjects' blood vessel health through ultrasound to measure blood flow and analysis of blood samples. In the exposure environment, this was done before exposure to establish baseline measures, immediately after exposure, and then 1 hour, 2.5 hours, and 24 hours after exposure. The study involved 10 young adult subjects between the ages of 29 and 31.

The study is the first of its kind to link injury to blood vessels with the decreased efficacy of the body's own repair mechanism, namely the endothelial progenitor cells (EPCs), the researchers said. EPCs are circulating stem cells in the blood that play a key role in the repair mechanism of injured blood vessels.

Download Center

HTML - No Current Item Deck
  • Safety Management Software - Free Demo

    IndustrySafe Safety Software’s comprehensive suite of modules help organizations to record and manage incidents, inspections, hazards, behavior based safety observations, and much more. Improve safety with an easy to use tool for tracking, notifying and reporting on key safety data.

  • Create Flexible Safety Dashboards

    IndustrySafe’s Dashboard Module allows organizations allows you to easily create and view safety KPIs to help you make informed business decisions. Our best of breed default indicators can also save you valuable time and effort in monitoring safety metrics.

  • Schedule and Record Observations

    IndustrySafe's Observations module allows managers, supervisors, and employees to conduct observations on employees involved in safety critical behavior. IndustrySafe’s pre-built BBS checklists may be used as is, or can be customized to better suit the needs of your organization.

  • Why Is Near Miss Reporting Important?

    A near miss is an accident that's waiting to happen. Learn how to investigate these close calls and prevent more serious incidents from occurring in the future.

  • Get the Ultimate Guide to Safety Training

    When it comes to safety training, no matter the industry, there are always questions regarding requirements and certifications. We’ve put together a guide on key safety training topics, requirements for certifications, and answers to common FAQs.

  • Industry Safe
comments powered by Disqus

OH&S Digital Edition

  • OHS Magazine Digital Edition - May 2019

    May 2019

    Featuring:

    • RESPIRATORY PROTECTION
      Why Pick a PAPR? 
    • FIRE SAFETY TRAINING
      Fire Safety: Plan, Prevent, Train, Recover
    • PROTECTIVE APPAREL
      The Truth About Heat Stress and FRC
    • AIHCE EXP 2019 PREVIEW
      Underestimated No More
    View This Issue