About Q-switched YAG laser

This is the most effective laser treatment for improving spots, bruises and freckles.

The Q-switched YAG laser reaches the lesion in 1 billionth of a second, so it is difficult to spread heat damage to the surrounding area and it works effectively only on the targeted area.
Since you can select between two wavelengths, you can effectively remove melanin that exists from shallow to deep.

What is a laser?

The nature of a laser is largely determined by two factors: wavelength and pulse width. Wavelength is the length of the wave of laser light. Sunlight is divided into seven colors (red, orange, yellow, green, blue, indigo, and purple) as “visible light” in the visible range. In addition to this, sunlight also includes infrared rays, which have a longer wavelength than red (because the sunlight is warm because of infrared rays), and ultraviolet rays, which have a shorter wavelength than purple and cause sunburn. ..

It can be said that sunlight is a collection of light of various wavelengths. A laser can output one of various wavelengths, which is repeatedly reflected between mirrors to amplify the energy. The nature of light differs depending on the wavelength.

The nature of a laser is largely determined by two factors: wavelength and pulse width. Wavelength is the length of the wave of laser light. Sunlight is divided into seven colors (red, orange, yellow, green, blue, indigo, and purple) as “visible light” in the visible range. In addition to this, sunlight also includes infrared rays, which have a longer wavelength than red (because the sunlight is warm because of infrared rays), and ultraviolet rays, which have a shorter wavelength than purple and cause sunburn. ..

It can be said that sunlight is a collection of light of various wavelengths. A laser can output one of various wavelengths, which is repeatedly reflected between mirrors to amplify the energy. The nature of light differs depending on the wavelength.

For example, ultraviolet rays have a bactericidal action and promote the production of melanin pigments, and infrared rays have a heat action that warms things. In general, the shorter the wavelength, the shallower the depth of penetration (acts only on the surface of the skin), and the longer the wavelength, the deeper the depth of penetration (acts deep on the skin).

The pulse width is the time during which the laser beam is irradiated. It’s like the shutter speed when taking a picture. By opening the shutter, the accumulated laser light is emitted at once by a certain kind of electric shutter. The pulse width varies depending on the application, such as 0.1 seconds or one millionth of a second. A “Q-switch” that can control the pulse width in 1 billionth of a second units has been developed, enabling laser treatment such as Ota nevus, acquired dermal melanocytosis (ADM), and tattoos, which were previously difficult to treat. became.

Q-switched YAG laser at our hospital

A YAG laser is a light source of Nd: YAG, and a Q-switched YAG laser is a pulse width of nanoseconds.
A feature of the Q-switched YAG laser is that it can irradiate laser light with two wavelengths, 1064 nm and 532 nm.

The melanin pigments that cause “blemishes” vary in depth and can be used to destroy the melanin pigments present in the deep dermis layer from the melanin in the shallow epidermis by using two different wavelengths.
Long wavelengths (wavelength 1064nm) are less likely to weaken in the middle of the skin and reach deep into the skin, while short wavelength light (wavelength 532nm) can effectively treat blemishes on the shallow epidermis. By using two wavelengths (532nm and 1,064nm) properly, the Q-switched YAG laser can remove pigment lesions from shallow to deep layers without damaging the surrounding normal tissue as much as possible.
Due to this property, it is excellent for removing bruise and tattoos that reach deep into the dermis layer as well as general UV spots.

Features of Q-switched YAG laser

Long wavelengths (wavelength 1064nm) are less likely to weaken in the middle of the skin and reach deep into the skin, while short wavelength light (wavelength 532nm) can effectively treat blemishes on the shallow epidermis. By using two wavelengths (532nm and 1,064nm) properly, the Q-switched YAG laser can remove pigment lesions from shallow to deep layers without damaging the surrounding normal tissue as much as possible.
Due to this property, it is excellent for removing bruise and tattoos that reach deep into the dermis layer as well as general UV spots.

Q-switch YAG laser treatment flow

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  Decision on medical examination and treatment indication

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  Cooling, anesthesia if necessary

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  Irradiate

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  Treatment of irradiated area

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  Treat with tape

  Be careful not to forcibly remove the tape and make it last as long as possible. Please follow the doctor’s instructions when applying medicines. The tape is finished when it is covered with new skin and there is no pain. After that, in order to prevent pigmentation and heal quickly and cleanly, avoid irritation such as rubbing the treated area and perform strict UV care. If necessary, we recommend the use of melanin inhibitors such as hydroquinone to improve pigmentation.

Q-switched YAG laser treatment effect

Blemish treatment with a Q-switched YAG laser may clean up once, but may require multiple treatments depending on the condition. If the treatment time is small, it will take tens of seconds. If you are treating a pigmented spot with a weak color tone, you will feel a slight pain as if it was repelled by a rubber band, so you can treat it without anesthesia.
For those who are worried about pain, using surface anesthesia before treatment will relieve the pain. Anesthesia may be required for treatment of deep spots or for extensive areas. It causes minor burns, and if care and care are not taken, pigmentation may remain.
Please follow the instructions of your doctor and take strict precautions regarding treatment and precautions during the course.

Indications

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• liver spot

  Laser treatment of chloasma is exacerbated by strong irritation.

• Spots suspected of being skin cancer or malignant

  A portion of the skin must be taken and examined to determine if it is malignant.

• Extremely tanned skin

  Those who wish to receive treatment will be examined once to determine if it is suitable for laser treatment. Please feel free to contact us.