Lasers in medicine.

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Lasers in medicine: the various aspects of application.

Lasers in medicine.

Initially, after the invention of lasers, few could have imagined that these light tools can be treated or otherwise improve the physical well-being. But doctors and medical researchers quickly spotted his opportunity, and the number of medical applications of lasers is increasing every year. For example, cutting tissue in surgical procedures, change in shape of the cornea to improve vision, treatment of blocked arteries burn cavities and tooth whitening, removal of unwanted hair, wrinkles, moles and freckles, and change in shape of the face in plastic surgery.
 

The coming of the "laser scalpel"
 

The first test of medical lasers, said that there are surgical procedures that are difficult to perform using conventional scalpel and a laser beam can be used instead. Their experiments have shown that well-focused beam of carbon dioxide laser can cut human tissue easily and accurately. The surgeon can direct the beam at any angle with a mirror mounted on a movable metal boom.

Several advantages of laser surgery have quickly become apparent. First, a ray of light homogeneous, ie, the energy transferred to the laser per unit time is constant.

So if the beam moves, the cut produced by them (the incision), has a constant depth, while at the same time, using a scalpel to make a doctor may accidentally cut too deep portion. Another advantage of laser surgery is that the hot beam as it moves cauterizes (or solders) open blood vessels (This works well mostly for small vessels, such as cutaneous vessels. Physician must still isolate the large blood vessels with traditional methods). Another advantage is that cells in human tissue does not conduct heat very well, so the skin, or any other tissue, located near the laser-cut, not much heat and not damaged beam. This advantage of laser surgery is very useful when the surgical field is limited to a small area that is surrounded by healthy tissues or organs.

It should be noted that the "laser scalpel" is not necessarily the best tool for each operation. Some doctors believe that, although the laser and is useful in some situations, it can never completely replace the scalpel. Others are more optimistic and see the day when the more advanced lasers completely replace the scalpel.

The second view may be more accurate, since the surgical use of lasers is evolving rapidly. At first it was thought that lasers are most effective for operations in easily accessible areas - on the surface of the body including the skin, mouth, nose, ears and eyes. But in recent years, doctors have demonstrated significant progress in the development of laser technology for use in the diagnosis and surgery of internal organs. Of course, in order to be able to control the laser beam, the physician must see inside the body. In some cases, this issue is easily solved by the creation of cutting and opening the area to be operated. But there are situations in which this can be avoided.
 

Purification of the arteries with light

For example, lasers are increasingly being used to clear the arteries of the human platelet plaques. Platelet plaque - a thick fatty substance that can accumulate on the inner walls of arteries. Over time, as can clog blood vessels, the blood ceases to flow normally and this can cause a heart attack or stroke, which is very dangerous and can lead to death. The traditional method of removing plaque, including the opening of the chest and the execution of several cuts is long and sometimes risky operation. In addition, it is expensive and requires several weeks to recover.

Effective alternative is to use a laser beam to burn off the plaque. Key role in ensuring a positive outcome of this work is the opportunity for the physician to see inside the arteries and direct the beam. This is another area in which a combination of fiber optics and lasers is a modern miracle tool. Optical fiber attached to the small cameras could be introduced into the artery. This miniature sensor allows the doctor and nurses to monitor the second fiber, which is introduced into an artery plaques for burning flash of light.

The method is as follows. Fiber-optic array is introduced into a blood vessel in the arm or leg, and slowly moves into the region of the heart and the blocked artery. When the array reaches the destination, the laser emits light and destroy plaque. Vapors as a result, sucked through a small hollow tube, which has been introduced, together with optical fibers. After cleaning the arteries of the doctor removes the fiber and the receiver - the operation is completed. This medical procedure known as laser angioplasty. It has some obvious advantages. First, cutting the tissue is not required (except for a small incision in the vessel for the introduction of fiber). In addition, blood loss is small or nonexistent, and the patient fully recovered after 1-2 days.

Laser angioplasty has a number of potential risks that must be considered. First, when the laser beam enters the plaque must be directed very precisely, because even a small mistake can penetrate the wall of the artery and cause serious bleeding. In this case, would still have to open the patient's chest. The second problem is associated with small particles of material remaining after the burning of the plaque.

Surgeons use a tiny laser to cut tissue in surgery of the gallbladder. Laser and a tiny camera is inserted into the stomach, so that the abdominal incision is required.

If they get into the bloodstream, it can cause blockage of small blood vessels that lead to more complications. Fortunately, the continuous technological progress has significantly reduced these risks, and the number of successful operations is growing.
Treatment of the eyes and reshaping the cornea with a laser

Some of the most remarkable achievements of medical lasers have occurred in the field of ophthalmology, the study of the structure and diseases of the eye. One of the reasons why the laser beams that are so useful in the treatment of the eye, is the fact that the cornea - a covering that covers the eyeball and transmits light into the eye - is transparent. Thanks to the cornea transmits a laser beam in the same way as ordinary light, the beam is on it has no effect.

First of all, the laser is very useful for removing extraneous blood vessels, which can be formed on the retina - the thin, light-sensitive membrane at the back of the eyeball. It was formed on the retina the image of objects that the eye can see. Sometimes, damage to the retina can lead to blindness in the United States is most often caused by diabetes mellitus (a disease characterized by high blood sugar) when, in some advanced cases, the retinal form of additional hundreds of tiny blood vessels. This leads to blockage of light coming from the membrane surface, which causes partial or complete blindness.

For the treatment of such conditions is most often used an argon laser. The doctor directs the beam through the cornea and burns plexus of blood vessels covering the retina. The procedure takes a few minutes and can be done in the doctor's office. The laser can also repair a retinal detachment - a part of the retina, which is separated from the back of the eyeball. Before the advent of lasers, retinal detachment had to fix manually, and because the retina is very fragile, it was a very complicated operation. Using an argon laser doctor can, roughly speaking, the "weld" severed part of the retina. Interesting coincidence: Gordon Gould (Gordon Gould), one of the first inventors of the laser, was later subjected to surgery to restore the retina by using this tool.

Another eye disease is glaucoma, which is characterized by accumulation of fluid in the eye. Usually, the natural flow of the liquid eyes a little, and he remains healthy. In the eyes affected by glaucoma, the fluid does not flow properly, and its effect on the accumulation of vision, and sometimes it leads to blindness. In some cases, glaucoma can be treated with medication. However, if this does not help, many doctors use a laser to avoid the traditional surgery. A laser pierces a hole in a predetermined location and the liquid flows through it. Again, the treatment can be performed in a doctor's office rather than in hospital.
 

The use of lasers for eye surgery

When restoring a detachment of the retina (the membrane covering the inside of the eye), the laser works like a sewing machine. The laser beam is set up so that he can safely pass through the lens of the eye and focus on the tiny pyatah around the damaged area of ​​the retina. When he is focused, the beam is able to "weld" or solder bleed area of  the retina back against the wall of the eyeball.

Perhaps the most exciting of all laser applications in ophthalmology is a change in the shape of the cornea. The technique is widely known as LASIK (which stands for Laser-Assisted In Situ Keratomilensis - laser keratomileusis). According to the description Hitza Breck (Breck Hitz), LASIK is not possible without risk.

Lens corresponding to the patient a prescription for glasses, it is literally cut in the cornea using an excimer laser beam (laser device that generates pulses of ultraviolet (UV) light). First, a small flap of the cornea is removed with a precision knife ... and the inside of the cornea is exposed to an excimer laser. After completion of the corneal flap, cut off at the start, return to the place over the ablated (surgically altered) of the cornea.

The patient undergoes eye surgery, performed with a laser beam. In addition to the treatment of retinal detachment, lasers can remove the cataract.

Produced permanent changes in the cornea, and there is always the danger of accidental damage. Nevertheless, the procedure every year becomes more and more popular, and about a million Americans have been operated on in 2000, and about four thousand surgeons in the United States have been trained to the procedure.

Some of the cosmetic use of lasers
 

Medical lasers are also widely used for various types of cosmetic surgery, including removal of some types of birthmarks. For example, wine stains - red-purple skin defects which appear in three of the thousands of children. These spots can occur on any part of the body, but are mainly found on the face and neck.

Medical laser can remove wine stain due to the same property that is used in a military laser, which can transmit a message submarine under water. Both devices use a monochromatic laser beam quality, ie its ability to glow in a certain color. The spot consists of thousands of deformed tiny blood vessels that have a certain red-violet color. This color is very strongly absorbs a certain shade of green light. In fact, this is why the stain is red. It absorbs the green and other colors of white light, but reflects the red, which the human eye sees.

To remove a stain on it the doctor moves the broad low-power beam of green set. The mass of blood vessels in the spot absorbs the laser radiation energy and heats up so much that eventually burns out. The surrounding skin has a color different from the color of the spot, so it absorbs only a small amount of light and not damaged (Of course, scorched the field to heal, and during this process is sometimes a slight scarring).

The doctor uses an argon laser for removing wine stains, a type of birthmark. Unwanted tissue burns, while normal skin remains intact.

Such a method is often successfully used to remove tattoos. Tattoos are created by introducing a very strong dyes in human skin by a needle. The person who made a tattoo at some point in life may decide that he or she no longer needed; previously the only way to remove tattoos was surgery or burning with acid. Fortunately, the laser is an alternative to such extreme measures. The beam bleaches dyes in the tattoo without burning the skin around it (As is the case with wine stains, possibly a slight scarring).

Another example of a cosmetic procedure performed by a laser - the removal of unwanted hair. "The laser emits a faint ray of light" - explains the Chicago cosmetic surgeon Jeffrey Melton (Jeffrey Melton), -

"Which is absorbed only by hair follicles (the skin is not damaged). The laser transmits energy which is absorbed by the hair and is converted into heat. The heat destroys the hair follicle in a split second. Laser hair removal ... is equally effective for removal of facial hair, and on the body. ... Perhaps the most common variant of the laser in this area - remove facial hair in women. "
 

Laser dentistry

Dentistry is another branch of medicine, which is widely used by the advantages of laser technology. Moreover, some people have lost their fear of his visit to the dentist due to the use of the laser. The procedure for drilling a cavity in the tooth does not like anybody. It usually requires anesthesia (pain reliever, such as Novocain), which causes an uncomfortable numbness in the mouth, in addition, the sound of a drill can cause irritation or even disgust in some people.

Many dentists are now using the Nd-YAG laser (which uses the crystal as the lasing medium work) instead of boron in most cases. Laser therapy uses the simple fact that the material, which is formed in the cavity, it is much softer than enamel (the hard part of the tooth). The laser power is set so that it is sufficient to remove the diseased tissue, but not strong enough to damage the enamel. When you create a very deep cavity is sometimes bleeding. The laser beam is usually isolates the blood vessels and stops bleeding.

The most frequently asked question about the treatment of cavities with lasers: Does it hurt? The answer is no. Each flash of light lasting dental laser only thirty trillion seconds, which is much less than the amount of time it takes nerve to call the pain. In other words, the light should last for 100 million times longer to cause discomfort. Thus, this treatment does not require anesthesia.

There are hundreds of other medical applications of lasers. Nevertheless, there are a myriad of diseases, in which a laser treatment may not help. And even in those cases where the application of the laser may be a physician in each case may have good reasons to choose another method. The fact is that, although the laser and is a wonderful medical tool, it can not cure every patient. However, at present, probably revealed only a small part of the potential of the laser. In the end, this superinstrument exists only since 1960, and, given the advances in medicine, which he has already achieved, the future is indeed promising.


The advantages of lasers in dental surgery

In this excerpt from an article published in The Dental Clinics of North America, Robert Strauss (Robert A. Strauss) of the Medical College of Virginia mentions some advantages of using lasers in oral and maxillofacial surgery.

When using the laser in oral and maxillofacial surgery post-operative swelling is manifested to a lesser extent than usual. Less swelling provides increased safety when performing operations on the respiratory tract (mouth) ... and increases the range of surgical procedures that a surgeon can perform safely, without risk to the respiratory tract. This property allows the surgeon to perform in the office or an outpatient basis, many procedures that previously would have required hospitalization. The healing of tissues ... and scars also improved by using a laser. Another benefit ... is that the wounds received as a result of laser exposure, usually heal without the formation of large scars and ... often do not require stitches.

Laser therapy - treatment of quantum cold laser.

Special PRICE: Kit "VIP-LASER Vityas" include:

Cold laser (Laser therapy - treatment of quantum cold laser) device VITYAS

+

DVD-disk: "Methodical Application Guide" + "Methodical Manual on Reflexotherapy"

+

! FREE converter 12v to 110v or 220v

+

!! FREE Protective goggles for quantum cold laser therapy

+

!!! FREE Optical nozzles Set for  Scope -Gynecology, Proctology , Stomatology, Otolaryngology, Reflexotherapy

+

!!!! FREE SHIPPING in all World

 

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