“I’m confident in the skills of Dr. Ellis and Dr. Ruth, so once Dr. Ellis talked to me about it more, I was ready to say yes,” he says.

The hot spot was treated using a pre-set Contaminated Wound Protocol: 2 watts for two minutes. Ellis provided the following breakdown:

Even a quick look into the beam of any visible laser, at any classification, can result in temporary effects such as dazzle, flash blindness or afterimages. Looking into the beam of a Class 3R laser can cause serious damage to the eyes. An eye injury can also occur if someone looks at a Class 1M or 2M laser through a telescope, binoculars or a magnifying lens.

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Health Canada published changes to the Radiation Emitting Devices Regulations (Laser Products) in Canada Gazette, Part II, on October 9, 2024. Learn more at: New requirements for laser products: Notice.

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Both Caldwell and Ellis struggled to come up with a cause for the lick granuloma. Buddy isn’t a chronic allergy sufferer, and there didn’t seem to be a behavioral factor involved.

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Buddy, a 5-year-old neutered male German shepherd and husky mix with a limited previous history of problems with dermatitis.

The label may provide information about the emission duration (time between pulses) or tell the user if the laser beam is visible or invisible.

“I’ve always felt good about taking any of my three dogs to their clinic,” he says. “Now I have one more reason to keep going back.”

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Changes have been made to the Radiation Emitting Devices Regulations (laser products) concerning the scope of products and safety requirements for lasers that are imported, sold or leased in Canada. These changes were published in Canada Gazette, Part II, on October 9, 2024 and take effect 1 year after this date.

Under the International Electrotechnical Commission (IEC) Standard 60825-1, laser products are categorized in the following order, from the lowest to highest potential hazard: Class 1, 1C, 1M, 2, 2M, 3R, 3B and 4. Classifying lasers according to their hazard level helps determine the necessary control measures to reduce the risk of eye and skin injuries. These measures include engineering safety features that are built into the device, warning labels, and user information.

Then the clinic at which she works in Olive Branch, Miss., added a Companion Therapy Class IV laser, and she got a chance to test it. At first she and her colleague, Ruth Wilburn, DVM, used the laser to speed healing of incisions and to relieve post-operative pain. Then they found it was effective in treating back and muscle injuries.

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May 28, 2024 — Depth of penetration: The 1064 nm wavelength enables the Nd:YAG laser to target deeper tissues without damaging superficial skin layers. This ...

Camera lenses ; Zoom lenses ; Next to this ring, you'll generally find focal length numbers. For example, if your lens is a 70-200mm zoom ; The maximum aperture ...

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Example of an alternative label, in English, appropriate for a Class 4 laser product. The label has a rectangular shape, with 5 panels bordered in black. The 4 panels on the top have a white background. Panel 1 shows the warning label. Panel 2 has an exclamation mark in a yellow triangle, the word DANGER on a red background, and the words LASER 4. Panel 3 has a red cross-out symbol and an eye that is exposed to a laser beam. Panel 4 has a red cross-out symbol and a hand that is exposed to a laser beam. Panel 5 has a yellow background and a black legend in the centre. The following words are in uppercase: AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION

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Brandy Ellis, DVM, had heard laser therapy touted as a cure-all, which only fueled her skepticism that the technological advance might be all hype and no help with her day-to-day delivery of veterinary care.

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For these reasons, a controlled laser safety environment and professional laser safety training are necessary for the safe operation of Class 3B and 4 laser products.

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Since then, Ellis has found herself searching for new opportunities to apply laser therapy. She doesn’t call it a cure-all, but she has a new appreciation for how it can be folded into a host of treatment plans.

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Laser products categorized as Class 3R or lower can be operated safely if used as directed and should always be used with caution. Here are a few guidelines to reduce your risk.

Health Canada administers the Radiation Emitting Devices Act (REDA) and its Regulations, which cover the sale, lease, advertisement, and importation of radiation emitting devices, including lasers. It's the responsibility of the manufacturer, importer or distributor to ensure their laser product complies with the applicable requirements set out in REDA and its regulations.

• First 30 seconds, frequency of 20 with 30 joules of energy delivered. • Second 30 seconds, frequency of 500 with 60 joules of energy delivered. • Third 30 seconds, frequency of 5,000 with 90 joules of energy delivered. • Fourth 30 seconds, frequency of 10,000 with 120 joules of energy delivered.

So when client Pete Caldwell brought in Buddy, his German shepherd mix, because of an acute case of lick granuloma, she had laser therapy in the back of her mind. When the hot spot didn’t respond to oral and topical treatments, the laser moved front and center.

Handheld lasers and laser pointers are popular and widely available in Canada. Battery powered handheld lasers may resemble pens or flashlights. These are most commonly used to point at objects in lectures or presentations. However, they may also be advertised for other uses. A simple handheld laser pointer can be more than a million times brighter than the average 100-watt light bulb in your home.

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“In this case, I wanted to use it for me and the greater knowledge it would bring that we might be able to apply to future cases,” she says.

Buddy’s regimen called for six laser treatments over a 31⁄2-week period, and after his first visit, “We were already noticing that the lesion was dryer, and the owner was noticing that the dog wasn’t licking the area as much,” Ellis says.

Class 3B and Class 4 handheld portable lasers are considered a danger to human health or safety. Their import, manufacture, advertising and sale is prohibited under the Canada Consumer Product Safety Act.

Caldwell has been bringing Buddy to the Olive Branch Animal Clinic since 2005, but this was his first experience with a hot spot. By the time he brought the dog in last Aug. 25, he had tried applying topical treatments and a sour-tasting solution to the area in hopes of discouraging Buddy from licking. Neither tactic was working.

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The protocol is designed to include low hertz (20) for pain reduction, higher hertz (500 and 5,000) for swelling and high hertz (10,000) for antimicrobial effect.

The condition did recur about a month later, and six more treatments were administered. The last was Dec. 10, and so far no lesions have returned.

Example of an explanatory label, in English, appropriate for a Class 4 laser product. The label has a rectangular shape, with a yellow background and black border. In the centre of the label is a warning, in black and uppercase: DANGER − LASER RADIATION. AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION CLASS 4 LASER PRODUCT

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For example, Class 3B and 4 handheld portable lasers are considered a danger to human health or safety under the Canada Consumer Product Safety Act. Their sale, import, advertisement and manufacture are prohibited in Canada.

Before the fifth treatment, the affected area was measured at one-fourth-inch long by one-fourth-inch wide. After the sixth treatment, both Buddy and Caldwell left happy.

When Caldwell and Buddy returned Sept. 4, the lesion was no better. By this time, Ellis was curious enough about the potential for laser therapy to speed healing in such a case that she offered to treat the dog at no charge. Caldwell agreed.

The Companion Therapy laser comes with programming embedded, which has helped Ellis and others at the clinic overcome any trepidation and become confident about its safe and effective use, she says.

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“I couldn’t be happier with the way things turned out,” says Caldwell, a Memphis, Tenn., resident. “For a while it looked like that hot spot would never clear up, but now Buddy’s doing just great. He’s a rescue, and he’s been the best dog anyone could have, so any time something is wrong with him, it bothers me quite a bit.”

The manufacturer of a laser product should also provide a user manual or instructions for safe assembly, maintenance and operation. The specific information that must accompany a laser product depends on the intended application and the hazard classification. Make sure to read the information carefully to understand the potential hazards and how to avoid them.

The example of the warning label for a laser product has a triangular shape, with a yellow background and black border. A black laser starburst hazard symbol is in the centre.

Thorlabs' non-polarizing beamsplitter cubes are offered here with broadband AR and beamsplitter coatings designed for 1100 - 1600 nm.

"Laser" is an acronym that stands for "Light Amplification by Stimulated Emission of Radiation." A laser typically emits a very focused and intense beam that can travel long distances. Some laser products are safe, but others can be very dangerous and can lead to injury if safety measures are not taken.

Ellis first sought to combat the hot spot by prescribing prednisone, an oral antibiotic and Gentocin topical spray to combat infection. She broached the idea of also trying laser therapy, but Caldwell wanted to give the other treatments a chance to work.