• Magazine
    • Past Issues
    • Subscribe
    • Change Mailing Address
    • Surveys
    • Guidelines for Authors
    • Editorial Calendar
    • Editorial Deadlines
    • Dynamic Chiropractic
      • Newspaper
      • Subscription
    • The American Chiropractor
      • Magazine
  • Practice
    • Business Tips
    • Chiropractic Schools
    • Clinical & Technique
    • eBooks
    • eCourses
    • Sponsored Content
    • Infographics
    • Quizzes
    • Wellness & Nutrition
    • Personal Growth
    • Podcast
    • Coronavirus (COVID-19)
  • Resource Centers
  • Products & Services
    • Buyers Guide
    • Products Directory
    • Submit a Product
    • Vendor Login
  • Datebook
    • Become an Events Poster
    • Post an Event
    • View Events
  • Jobs
    • Jobs
    • Post a Job
  • Advertise
    • Advertising Information
    • Media Kit
    • Contact Us

Your Online Chiropractic Community

Chiropractic Economics Your Online Chiropractic Community
Subscribe
  • Home
  • Current Issue
  • News
  • Webinars
  • Chiropractic Research
  • Students

Need-to-know terms for chiropractic laser therapy

Rob Berman June 2, 2016

chiropractic laser therapy

More and more chiropractors are exploring laser as part of your portfolio of healing modalities.

Here are the definitions of some of the key laser terms and laser classifications to offer clarity and elevate your knowledge of lasers.

Laser term definitions

Average power: Refers to the average power that a laser emits during the treatment, measured in watts (W).

Duty cycle: Ratio of “on” duration compared to “off” during one period.  A period is the time it takes to complete an on-and-off cycle.

Continuous Wave Pulsed Laser: Produces a fixed level of power during the emission time but can be modulated down or momentarily shut off to reduce heat build-up.  When operating in continuous wave or pulsed (CW) mode, usually a by-product is a thermal effect.  Therefore, the laser hand piece should be regularly moved to minimize heat buildup and risk of tissue damage, which allows for treating a larger target area.

Effective Dose: Is the dose or amount that produces a therapeutic response or desired effect.

Energy: Commonly used to characterize laser output, measured in joules (J).

Energy Density/Fluence: The energy density expresses the total amount of energy delivered per unit area, in joules per square centimeter (J/cm2).

Hertz (Hz): Unit of frequency, i. e. “pulses per second”, listed in Hz.

Joule (J): A unit of energy describing the work required to produce one watt of power for one second (one watt-second).

Joule cm2 (J cm2): A unit of radiant exposure used in measuring the amount of energy per unit area of absorbing surface or per unit area of a laser beam. Also called the dose.

Peak Power: The maximum pulse power output of a laser and it is fixed by the laser manufacturer.

Power:The time rate at which energy is transferred. Usually expressed in watts (joules per second); also called radiant flux.

Power Density: The intensity of the laser beam, average power divided by size of beam (“spot size”); relates to the dose.

Pulse Mode: The pulse energy is simply the total optical energy content of a pulse. Pulse mode is operation of a laser when the beam is intermittently on in fractions of a second.

Superpulsed Laser: Produces high power impulses of light for a very brief duration to more effectively drive light energy into the target tissue. There are no or minimal thermal effects in the tissue because the pulses are of extremely short duration on the order of 200 billionths of a second, thus emitting low average power relative to CW pulsed lasers.  Therefore, the laser may be held in specific targeted areas without movement and no risk of injuring tissue with heat buildup. The generally accepted minimum for pulses is 30,000 hertz.

Watt (W): The unit of power; equivalent to one joule per second.

Watt cm2 (W cm2): A unit of irradiance used in measuring the amount of power per area of absorbing surface, or per cross-sectional area of a laser beam.  Also called power density.

Laser classifications

chiropractic laser therapy

Note: Class is based on safety, not clinical performance 

Safety classifications explained

Our less technical explanations for the laser classifications:

  • Class 1: Low-power lasers incapable of causing eye damage and are exempt from any control measures. Example: a barcode reader. Safety goggles not required.
  • Class 2: Low-power lasers that operate in the visible spectrum that are incapable of causing eye damage unless they are viewed directly for an extended period (greater than 1,000 seconds). Examples: laser pointers and LEDs.  Safety goggles not required.
  • Class 3a: Lasers that normally would not produce a hazard if viewed for only momentary periods <0.25 seconds with the unaided eye (blink reflex). They may present a hazard if viewed using collecting optics.  Safety goggles required.
  • Class 3b: Lasers that can produce a hazard if viewed directly. This includes intrabeam viewing of specular reflections. Many low level lasers or “LLLT” lasers fall into this category.  Safety goggles required.
  • Class 4: Lasers capable of causing severe eye damage with short-term duration (<0.25 seconds) exposures to direct, specularly reflected, or diffusely reflected beams. Safety goggles required. Please remember that Class 4 Therapy lasers are different from Class 4 Surgical lasers.

Knowing what these laser terms and classifications are will help you when shopping for your first laser or to upgrade your current laser.

Rob BermanRob Berman is a partner at Berman Partners, lCC, a medical device sale, service, and marketing company. Berman Partners specializes in new and preowned therapeutic lasers. He helps doctors improve patient outcomes while increasing physician income. He has held a variety of marketing roles during his career. He can be contacted at 860-707-4220, rob@bermanpartners.com, or through bermanpartners.com.

 

 

Michael Mathesie

Michael Mathesie, DC, DACRB, DABFP, has been practicing in Coral Springs, Florida for 25 years.  He has been teaching and utilizing laser therapy in his practice since 2005.  During this time he has attained two board certifications; one from the American Chiropractic Rehabilitation Board (DACRB) and the other from the American Board of Forensic Professionals (DABFP); both are recognized specialty boards of the American Chiropractic Association. He can be reached at 954-755-1434.

Related Posts

  • Parker alumni awarded for contributions to chiropracticParker alumni awarded for contributions to chiropractic
  • Why you should revise your mobile job application for new candidatesWhy you should revise your mobile job application for new candidates
  • Fabrizio Mancini, DC, debuts chiropractic message on Dr. Phil showFabrizio Mancini, DC, debuts chiropractic message on Dr. Phil show
  • Autumn's pollen and mold can challenge those with allergiesAutumn's pollen and mold can challenge those with allergies
  • Why being a late PM adopter might not be a bad thingWhy being a late PM adopter might not be a bad thing
  • Logan College of Chiropractic students, professors visit Standard ProcessLogan College of Chiropractic students, professors visit Standard Process

Filed Under: Chiropractic Practice Management, Clinical & Chiropractic Techniques

Current Issue

CE issue 5 cover

Follow Us

  • Facebook
  • Twitter
  • Instagram
  • LinkedIn
  • YouTube logoYouTube logoYouTube

Compare Subscriptions

Dynamic Chiropractic

The American Chiropractor

3948 3rd Street South #279,

Jacksonville Beach, FL 32250

Phone 904.285.6020

CONTACT US »

Privacy Policy & Terms of Service

Copyright © 2021, All Rights Reserved

SUBSCRIBE TO THE MAGAZINE

Get Chiropractic Economics magazine
delivered to your home or office. Just
fill out our form to request your FREE
subscription for 20 issues a year,
including two annual Buyers Guides.

SUBSCRIBE NOW »

Latest Chiropractic News

  • Cleveland University-Kansas City Launches New Continuing Education Website
  • New Report Cites Nutrition Response Testing® Helping Chiropractors Increase Value and Results
  • Military Husband and Wife Team Set to Expand The Joint Chiropractic into Puerto Rico