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Blogs > Class I vs Class IV Lasers - Does it Matter?

Class I vs Class IV Lasers - Does it Matter?

Laser therapy has emerged as a valuable treatment modality in veterinary medicine, offering a non-invasive and drug-free approach to manage pain and promote tissue healing. As veterinary professionals, it is essential to have a comprehensive understanding of the classification system used for laser therapy devices to ensure the safe and effective use of these devices. In this article, we will delve into the different classifications of veterinary laser therapy devices, namely Class I, Class II, Class III, and Class IV. However, it's important to note that while the classification relates to laser safety, it does not directly indicate clinical outcomes. Each class has unique applications and purposes, thus making direct comparisons between classes inappropriate.

Laser Classifications

Laser therapy has become increasingly popular over the years, leading to today’s marketplace comprising of a range of laser therapy systems, all with varying power output and therapeutic effects.  Knowing the difference between the laser classes and how it will affect treatment and the cost to your practice, is important to ensure you choose the correct system.

Laser classifications are strict safety and hazard ratings by the FDA and OSHA. Laser classification is based on the output of power of the laser and its potential for harm to skin damage (heat), and damage to the eyes. All lasers above a class II (2) must be labelled.

Class IV  laser therapy devices represent the highest power output among the three classifications and are considered "high-risk" lasers. They require strict safety protocols to prevent damage to the eyes, skin, and other tissues.

Class III  laser therapy devices generate a higher power output than Class I devices, but they still fall within the "moderate-risk" category. These lasers pose a potential hazard if not used with caution, requiring veterinary professionals to exercise appropriate safety measures when operating them.

Class 2  lasers are safe for normal operation. Typically these lasers will not harm the eyes unless a person deliberately looked at the laser beam. These include laser pointers and some therapeutic lasers in the visible spectrum of 4-700nm.

Class I  laser therapy devices are considered the safest among laser classifications. These devices emit low-powered lasers that pose no significant risk to the eyes or skin when used as intended.


What Is The Differences Between Class I & Class IV Lasers?

The classification of a laser therapy device only pertains to its safety profile and does not directly correlate with clinical outcomes. Each class of laser has distinct characteristics, such as power output, wavelength, and penetration depth, that influence their therapeutic applications. Class I, Class IIIB, and Class IV lasers all have their respective roles and purposes in veterinary practice. Rather than comparing different laser classes, veterinary professionals should focus on selecting the appropriate laser therapy device based on the specific condition being treated, treatment goals, and desired clinical outcomes.

Click here - to read our article on " Choosing the right laser for your practice"


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