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FAQs

概述

1. What is laser therapy?

Laser therapy or Laser Phototherapy is a method where light from a laser is applied to tissue (or cells in culture) in order to influence cell or tissue functions with such low light intensity that heating is negligable. The effects achieved are hence not due to heating but to photochemical or photobiologic reactions like the effect of light in plants. The lasers used are normally called therapeutic lasers or medical lasers.

This is in contrast to the use of lasers in surgery and for esthetic purpose where strong lasers are used and where the biologic effects (cutting, evaporating, coagulating) are based on heat development from the absorption of strong light, i.e. burning glass effect.

    

 

 

2.What is the correct name: LLLT, LPLT, therapeutic laser, soft

 Regarding the therapy, we have chosen to use the term LLLT (Low Level Laser Therapy). This is the dominant term in use today, but there is still a lack of consensus. In the literature LPLT (Low Power Laser Therapy) is also frequently used.

Regarding the laser instrument, we have chosen to use the term "therapeutic laser" rather than "low level laser" or "low power laser", since high-level lasers are also used for laser therapy. 
The term "soft laser" was originally used to differentiate therapeutic lasers from "hard lasers", i.e. surgical lasers. Several different designations then emerged, such as "MID laser" and "medical laser". 
"Biostimulating laser" is another term, with the disadvantage that one can also give inhibiting doses. The term "bioregulating laser" has thus been proposed. An unsuitable name is "low-energy laser". The energy transferred to tissue is the product of laser output power and treatment time, which is why a "low-energy laser", over a long period of time, can actually emit a large amount of energy. Other suggested names are "low-reactive-level laser", "low-intensity-level laser", "photobiostimulation laser" and "photobiomodulation laser". "LPT - Laser Photo Therapy" is a recently suggested term, and winning acceptance.
Thus, it is obvious that the question of nomenclature is far from solved.
This is because there is a lack of full agreement internationally, and the names proposed thus far have been rather unwieldy. Feel free to forget them, but remember LLLT until agreement is reached on something else.
 

3.Can therapeutic lasers injure your eyes?

 Yes and no! Read the following: 

Any strong light source - laser or not - can injure an eye.There are strong lasers that can cut in plastic and even steel. They can injure eyes and tissue, but laser pointers and therapeutic laser can normally not. Read more below:
The following factors are of importance regarding the eye risk of different lasers:
The output power (strength) of the laser. It is fairly obvious that a powerful laser (many watts) is more hazardous to stare into than a weak laser.
The divergence of the light beam. A parallel light beam with a small diameter is by far the most dangerous type of beam. It can enter the pupil, in its entirety, and be focused by the eye's lens to a spot with a diameter of hundredths of a millimetre. The entire light output is concentrated on this small area. With a 10 mW beam, the power density can be up to 12,000 W/cm2
The exposure time. To burn the retina, a certain energy is needed. Energy is power multiplied by time, so exposure time is important. 
The wavelength of the light. Within the visible wavelength range, we respond to strong light with a quick blinking reflex. This reduces the exposure time and thereby the light energy which enters the eye. Light sources which emit invisible radiation, whether an infrared laser or an infrared diode, always entail a higher risk than the equivalent source of visible light. Radiation at wavelengths over 1400 nm is absorbed by the eye's lens and is thus rendered safe, provided the power of the beam is not too high. Radiation at wavelengths over 3,000 nm is absorbed by the cornea and is less dangerous.
The distribution of the light source. In an eye, like in a camera, the image of the source is projected on the retina/film. In a laser, the source is very small, so it is depicted as a point (compare with a burning glass where you get a picture of the sun in the focus "point"). A widely spread light source is projected onto the retina in a correspondingly wider image, in which the light is spread over a larger area, i.e. with a lower power density as a consequence. For example: a clear light bulb is apprehended as a more concentrated light source than a so-called "pearl" light bulb. A laser system with several light sources placed separated from each other (often called multi probe) constitutes a smaller hazard to the eye than if the entire power output was from one laser source, because the light sources separate placement means that they are reproduced in different places on the retina. 
In conclusion. Lasers in general are much less dangerous than people think. No person has become blind by a laser. A few people have got injuries. Normally they will not notice such an injury. Even in the worst cases (where the inury is extensive and in the midle of the fovea) the consequensies are much less than any injury caused by stones, knifes, dart arrows, fireworks, dry branches int the forrest etc.
 

与其他方法及产品比较

1.Effect comparison of various kinds hair growth method

Laser therapy or Laser Phototherapy is a method where light from a laser is applied to tissue (or cells in culture) in order to influence cell or tissue functions with such low light intensity that heating is negligable. The effects achieved are hence not due to heating but to photochemical or photobiologic reactions like the effect of light in plants. The lasers used are normally called therapeutic lasers or medical lasers.

This is in contrast to the use of lasers in surgery and for esthetic purpose where strong lasers are used and where the biologic effects (cutting, evaporating, coagulating) are based on heat development from the absorption of strong light, i.e. burning glass effect.

    

 

 

需要考虑的首要问题

1.Is an expensive Instrument better than a cheap Instrument?

It depends. If it's not easy to use and doesn't produce good results for your clients, then it doesn't matter what it cost. A therapeutic instrument is always an investment, so the important thing is that you carefully evaluate what you get with your purchase. Is the service good? What support is given with your purchase? Is the company that manufactures / distributes the therapy knowledgeable? See also other questions on this web page.

 

 

2.In LLLT,are strong lasers better than weaker ones?

 YES and NO.

Output power should not be too low for its purpose. If the power is too low, it causes unnecessarily long treatment time in order to achieve the required total dose. Also, if output power is too low, it could result in the power density being too low which is an important parameter in treatment.
 
Nor should output power be too high for its purpose. If the power is too high, the light could burn tanned, colored, or skin with dark hair. Furthermore, in most countries, there is a power limit of 500 mW (= 0.5 watt), above which the laser will be a Class 4 laser. If so, it usually means that it requires oversight by an MD or DD. Also, if the power is too high it can result in unintentionally high doses which can treatment results.
 
And finally, time is also a factor. Administering an optimal dose during a very short time will not necessarily give as good a result as an optimal dose during longer treatment time.
Some laser companies claim that a Class 4 laser 'by default' is better than a Class 3B laser (4 is higher than 3, so it has to be better…?have anything to do with the laser classification. The factors which must be considered are
              1) the dose 
                         2) the time over which the dose is administered
              3) type of laser.
 

3.From the perspective of spare parts provided, how should I cho

 This is an important question to ask a salesman. A producer has a monopoly on many spare parts such as printed circuits.If the manufacturer is not well-known manufacturers, once it is closed you will never can't buy spare parts.

 

4.What happens if it breaks?

 For some therapists, the instrument is their main source of income, so this question is highly relevant.

 

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