Red Light Therapy Vs. Class IV Laser Therapy

The use of light therapy to promote healing and resolve inflammation is gaining traction in modern medicine. Two notable approaches include Red Light Therapy (RLT) and Class IV laser therapy. While these methods share similarities, they also have several distinct differences, affecting their applications and effectiveness. Let’s dive into a comparative analysis of RLT and Class IV laser therapy.

Table of Contents

• Similarities
• Differences
• What is the Difference Between Infrared and Red Light Therapy?

Similarities

Mechanism of Action: Both RLT and Class IV laser therapy operate on a concept known as photobiomodulation (PBM). This process involves using specific light wavelengths to stimulate cellular activity, enhance recovery, and resolve inflammation. Essentially, both forms of therapy use light energy to help cells perform their functions more efficiently.

Therapeutic Applications: RLT and Class IV laser therapy are both non-invasive treatment options often used in physical therapy, sports medicine, and pain management. They have proven effective for various conditions such as arthritis, tendinitis, muscular injuries, neuropathy, skin conditions, and wound healing. Both types of therapy can alleviate pain, resolve inflammation, and accelerate tissue repair and regeneration.

Differences

Type of Light and Wavelength: The most significant difference between the two forms of therapy is the type of light and wavelength used. RLT uses a range of both red and near-infrared light (600-1000 nm), while Class IV laser therapy uses a more concentrated, high-powered laser in the near-infrared range (>800 nm). The more powerful the light, the deeper it can penetrate tissue, making Class IV laser therapy more effective for deep-seated injuries.

Type of Light and Wavelength: Others might be curious, ‘What is the difference between red light therapy and infrared?’ The most significant difference between the two forms of therapy is the type of light and wavelength used. RLT uses a range of visible red light (600-700 nm) and near-infrared light (700-1000 nm), while Class IV laser therapy uses a more concentrated, high-powered laser in the near-infrared range (>800 nm).

It’s important to note that while RLT uses both red and near-infrared light, the term “infrared therapy” typically refers to treatments that use only infrared wavelengths, which are invisible to the human eye. Infrared therapy can be further divided into near-infrared (700-1400 nm), mid-infrared (1400-3000 nm), and far-infrared (3000-100,000 nm) categories. In contrast, red light therapy specifically uses visible red light, which has a shorter wavelength than infrared light.

The wavelength of light used determines its ability to penetrate tissues. Red light is readily absorbed by superficial tissues and is particularly effective at stimulating cellular processes in the skin. Near-infrared light penetrates deeper into the body, reaching muscles, joints, and even bones. The more powerful the light, the deeper it can penetrate tissue, making Class IV laser therapy more effective for deep-seated injuries.

Energy Delivery and Duration: RLT delivers lower energy levels over a wider surface area and longer time duration, typically around 10-20 minutes. It is a gentle therapy, capable of penetrating up to 5 mm beneath the skin’s surface. In contrast, Class IV laser therapy delivers high energy in a shorter time frame, typically 5-10 minutes, and can penetrate tissues up to 5 cm deep. This makes it effective for treating not only superficial but also deep-seated injuries.

Safety and Side Effects: Both therapies are generally safe. However, due to the higher power, Class IV laser therapy must be applied with caution to avoid potential thermal injuries. Patients and providers must wear protective eyewear during treatment to prevent ocular damage. In contrast, RLT has few reported side effects, with a lower risk of thermal injury.

Cost and Availability: RLT devices are available at various price points and sizes, from professional units to affordable at-home devices, making this therapy widely accessible. Conversely, Class IV lasers are significantly more expensive and are typically only found in professional healthcare settings.

Regulatory Approval: As of my knowledge cutoff in September 2021, the U.S. FDA has not cleared RLT devices to treat specific medical conditions, although they are widely used off-label. In contrast, the FDA has cleared several Class IV laser devices for relieving minor muscle and joint pain, and stiffness, and promoting the relaxation of muscle tissue.

While both RLT and Class IV laser therapy utilize the principles of photobiomodulation for therapeutic benefits, they do so in distinct ways. RLT, with its broader spectrum of red and near-infrared light, offers a gentler, more accessible approach that’s well-suited for superficial issues. In contrast, Class IV laser therapy, with its powerful, targeted beams, provides a more potent solution for deeper injuries. The choice between the two will depend on the specific needs of the patient, the depth of the target tissue, and the availability of devices. Always consult a healthcare provider to choose the best treatment option.

What is the Difference Between Infrared and Red Light Therapy?

Laser red light therapy uses visible red light (600-700 nm), while infrared therapy utilizes invisible infrared wavelengths (700-100,000 nm). Red light is readily absorbed by superficial tissues, while infrared penetrates deeper into muscles and bones. The choice depends on the target tissue depth and condition being treated.

At The BodyFix, We offer Treatments of Class IV Laser Therapy. We have a top-quality SUMMUS Medical Laser that helps treat various diagnoses!

Find out more information from our experts at The BodyFix. Or Book an Appointment with us today to start your healing journey! For more information, you can call us at 843-981-4500.