Laser therapy device for the treatment of dogs, cats and horses
A handy low-level laser therapy device with 400 mW of power and a wavelength of 808 nm. The L400 Personal Laser is one of the smallest low-level lasers on the market. Equipped with a powerful Li-ion battery, it ensures a long treatment time.
The L400 is an effective and powerful all-round laser, specifically developed for the treatment of pain and injuries in horses, dogs, and cats. The laser wavelength of 808 nm ensures effective penetration into skin and tissue. Treatment depth: approximately 3-4 cm.
Why choose the PERSONAL-LASER™ L400?
The PERSONAL-LASER™ L400 is the big brother of the L200 and the most powerful PERSONAL-LASER for home use. With a laser output of 400 mW at a wavelength of 808 nm (invisible/infrared), it covers all major applications. Pet owners can thus treat a wide range of illnesses and injuries in dogs, cats, and horses themselves. 
The L400 is significantly more powerful than its smaller brother, allowing the laser light to penetrate deeper into the skin, muscles, tendons, and joints. This higher power also reduces treatment times. The L400 is particularly well-suited for treating deeper wounds and injuries.
Here are a few basic properties that laser light is said to have:
- Stimulation of cell metabolism
- ATP production
- Local concentration of lymphocytes, leukocytes and macrophages
- Improvement of blood circulation
- Stimulation of collagen production
- Improved oxygen uptake into the cells - Normalization of the Na-K pump - Normalized cell membrane potential
The laser light generated by the L400 is monochromatic (single wavelength), coherent (all photons move in the same phase and direction), and collimated (minimal divergence/expansion of the laser beam over a distance). These three properties allow the therapy laser light to be focused on a specific area of the body.
It also penetrates deeper tissue without heating or damaging it. This allows the laser beam to interact with the tissue with very few side effects. 
The optimal wavelength range for LLLT/PBM (photobiomodulation) applications ranges from 600 nm to approximately 1000 nm. This is also referred to as the "biological window." At longer wavelengths, the laser beam penetrates deeper into the tissue. At the same time, absorption by the animal's hair and skin pigment is minimized.
Shorter wavelengths are used to treat superficial wounds and joint injuries. Longer wavelengths are better suited for laser therapy of muscle and tendon injuries.
The difference between LEDs and laser diodes
There are various veterinary lasers on the market that are sold for applications in animal physiotherapy. Often, you'll find LED devices that are labeled as laser therapy devices, but differ in some respects from "real" lasers, such as the Personal Laser L400.
The abbreviation LED stands for "light-emitting diode." A diode that emits light when current flows through it, often in many different colors. The word LASER, on the other hand, stands for "light amplification by stimulation of emitted radiation." A light source is first amplified in a medium and then emitted in a special way, described below.
A true veterinary laser is monochromatic. This means that the light it produces has a single, very specific wavelength. LEDs can also produce monochromatic or nearly monochromatic light. However, only true lasers like the L400 concentrate their full power into a small spot. Laser light is coherent (see illustration), and coherent light can be transmitted over much greater distances than incoherent light.
LEDs distribute their power over a larger area during application, but without achieving a greater penetration depth into the tissue, as is possible with the Personal Laser L400.
Calculation of laser dosage and energy density
An important factor in laser therapy for animals is calculating the appropriate energy density for the specific illness or injury. To calculate the energy density, the units are converted; this involves converting the laser power in mW to watts. For the L400, this is 0.4 watts.
Power, energy, and time are related, with power being the rate of energy delivery over time. The energy delivered by a laser can be calculated by multiplying the laser power by the treatment duration. For the L400, this is based on a treatment duration of 4 minutes.
Energy (delivered dose) = power x time = 0.4W x 240s = 96 joules (J)
Energy density is an important factor in laser treatment of animals. To calculate this, the delivered energy (J) is divided by the area in square centimeters.
Energy density = energy/area (J/cm²)
Power unit = watt (W)
Area = cm2
Energy = Joule (J)
Energy density = joules per square centimeter (J/cm²)
Calculating the energy density
| Area | energy | Energy density |
| 100cm² | 96J | 0.96J/cm² |
| 10cm² | 96J | 9.6J/cm² |
| 1cm² | 96J | 96J/cm² |
LLLT laser treatment technology
The laser treatment should be performed directly on the skin, preferably not through thick fur, as this can absorb some of the laser light.
To ensure effective laser application, a few things should be considered:
• Regardless of whether the point or scan treatment technique is used, the personal laser should be in contact with the skin whenever possible. This eliminates energy loss from the laser beam due to reflection from the skin, allowing more energy to penetrate the tissue.
• The laser should be held perpendicular to the treatment site. Otherwise, light energy may be lost due to beam deflection and reflection.
When the L400 laser applies gentle pressure to the skin, part of the blood flow to the treatment area is blocked. This reduces the absorption of laser energy by the hemoglobin and oxyhemoglobin in the blood.
Scan treatment technique 
The scanning technique is one of three treatment options that can be performed with the L400 veterinary laser. It is used for surface treatments around the treatment area, for treating larger areas (bite wounds, eczema, psoriasis, etc.), and especially for treating areas with dark, heavily pigmented skin, dark hair follicles, or dark fur.
With the scanning technique, the laser optics are gently pressed into the skin. The laser is then moved in circular or rectangular motions over and around the treatment area.
Point treatment technique
During spot treatment, the laser is moved from point to point, as shown in the image, with a distance of 1-2 cm between each point. The laser then remains on each point for the time in seconds specified in the veterinary dosage recommendation.
When laser treating bite wounds and eczema, the laser should be held approximately 1 cm from the skin. Only when the area just outside the open wound has been reached can the laser optics be gently pressed back into place.
Treatment of wounds 
Bite wounds or other open skin areas should only be treated along the wound edges with the laser optics in contact with the skin (4J/cm²). Either the spot or scan technique can be used here. Treatment within the wound should be performed without the optics in contact with the skin (0.5-1J/cm²). The laser optics of the L400 laser are held approximately 1 cm above the wound, and then treatment can be performed using the spot or scan technique.
Try it first, then buy! Still unsure and want to try out the laser first? For a rental fee, we'll send you the Personal Laser L400 for 1-4 weeks. If you purchase a laser from our range at the end of the rental period, 50% of the rental fee will be credited.
Interesting articles and information:
1. Laser dosage and treatment frequency for different diseases.
2. Laser therapy in veterinary medicine – properties, effects, safety
Legal Notice: Statements on our product page regarding the possible applications of laser therapy and the expected effects are based on the experiences of laser therapy users. This includes medical professionals (veterinarians and animal physiotherapists), many of whom have been using LLLT laser therapy in their practice for many years.
With the descriptions of the laser therapy devices, we do not intend to create the impression that using the devices can guarantee an improvement in symptoms. No promises of a cure can be made. If your pet is experiencing symptoms, you should always consult a veterinarian first to discuss possible conventional medical therapies and alternative medicine options.