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Answer + Analysis

1. In laser medical beauty treatment, what does the pulse width of the laser determine?

A) Color of laser
B) Time of laser energy release and its effect on target tissue
C) Brand of laser
D) Shape of laser

Answer: B
Analysis: Pulse width is a key parameter in laser treatment, which directly affects the time of laser energy release and its effect on target tissue. According to the principle of selective photothermal action, laser energy is absorbed by target tissue and converted into heat energy in a short time, causing instantaneous changes in tissue. The choice of pulse width must match the characteristics of target tissue to ensure effective treatment. For example, shorter pulse width can effectively destroy pigment particles, while longer pulse width can promote collagen regeneration, thereby improving the overall structure and elasticity of the skin. Therefore, pulse width is not only related to the quality of treatment, but also affects the safety and comfort of patients.

2. What type of treatment is short pulse width laser mainly used for?

A) Deep wrinkle repair
B) Pigmentation and tattoo removal
C) Skin sagging treatment
D) Improve skin elasticity

Answer: B
Analysis: Short pulse width laser is usually used to remove pigmentation and tattoos. This is because in the case of short pulse width, the laser energy is released at a very fast speed, so that the pigment particles are heated and broken in an instant. Using the principle of selective photothermal action, the thermal impact on the surrounding normal tissue is relatively small. Therefore, short pulse width laser can accurately act on pigment cells to achieve the effect of removing spots, freckles, etc., while reducing damage to the surrounding skin. This treatment method is suitable for patients who want to improve skin pigmentation problems quickly and effectively.

3. What type of treatment is long pulse width laser mainly used for?

A) Pigmentation removal
B) Skin remodeling
C) Laser wrinkle removal and skin tightening
D) Tattoo removal

Answer: C
Analysis: Long pulse width laser is mainly used for treatments such as wrinkle removal and skin tightening. With a longer energy release time, the laser can act on the skin tissue for a longer time, which helps to increase the temperature of the tissue and stimulate collagen production. Selective photothermal effect plays an important role in this process because it allows thermal energy to penetrate deep into the skin without causing excessive damage to the surface. This treatment method not only helps to improve skin sagging and wrinkles, but also makes the skin smoother and more elastic, so it is widely used in the anti-aging and beauty fields.

4. What are the advantages of long pulse width laser?

A) Short energy release time
B) Effectively control thermal effects and reduce instantaneous damage to the skin
C) Very short treatment time
D) Immediately remove pigments

Answer: B
Analysis: A significant advantage of long pulse width laser is that it can effectively control thermal effects and reduce instantaneous damage to the skin. This is because the laser energy is released over a relatively long period of time, allowing the skin to have enough time to dissipate heat, thereby reducing thermal damage caused by rapid heating. This feature makes long pulse width laser safer during treatment, especially when targeting sensitive skin. By optimizing selective photothermal effects, therapists can ensure that laser energy penetrates into the appropriate layers of the skin, effectively promoting skin regeneration and repair, and bringing better cosmetic results.

5. What is the effect of choosing the right pulse width on the effect of laser treatment?

A) Affect the color and shape of the laser
B) Ensure the accuracy and safety of the treatment
C) Increase the treatment time
D) Change the treatment site

Answer: B
Analysis: Selecting the right pulse width is crucial to the effect of laser treatment, because different pulse widths can achieve different treatment purposes. Shorter pulse width lasers are suitable for treating pigmentation problems, while longer pulse width lasers are more suitable for promoting skin firming and anti-aging. The precise selection of pulse width not only affects the effect of treatment, but is also directly related to the safety and comfort of the patient. By combining the principle of selective photothermal action, the therapist can improve the effectiveness of the treatment while controlling the thermal impact. Therefore, the precise selection of pulse width can significantly improve the accuracy and safety of treatment, allowing patients to achieve ideal cosmetic results.