| 영문 | laser | 한글 | 레이저 |
|---|---|---|---|
| 설명 | Light amplification by stimulated emission of radiation의 약어. 여러 가지 주파수의 빛을 가시역내에서 극도로 강력하고 작은, 거의 발산성이 없는 동일상의 단일 방사광속으로 바꾸는 장치. 1960년 Maiman은 루비결정을 사용하여 레이저를 발생시키는 연구에 성공했다. 물질의 원자는 고유의 스펙트럼선을 갖고 있어, 보통은 낮은 안정된 에너지 수준에 있지만, 이것에 강한 빛을 쪼이면, 이 에너지를 흡수하여 최외각의 전자가 에너지 수준이 높은 궤도로 옮겨간다. 그러나 불안정하기 때문에 곧 원래의 궤도로 돌아가며, 그때 흡수한 에너지와 동등한 광자에너지를 방출한다. 이 광자에너지는 가까이에 있는 원자를 들뜨게 하는데, 이것이 연속적으로 일어나는 것을 유도방출이라고 하며, 원자 고유 파장에서 위상이 똑같은 점이 특징이다. 종류에는 기체, 액체, 고체 레이저가 있다. 치과에서는 고체인 루비와 반도체레이저가 소프트레이저로서 진통용으로 사용되고 있다. 또한 절개용으로서 CO2레이저가, 절개용으로서는 Nd-YAG와 Er-YAG 레이저가 사용되고 있다. |
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| 영문 | laser surgery | 한글 | 레이저수술 |
|---|---|---|---|
| 설명 | 레이저를 이용한 수술방법. 레이저 광선은 일반적인 전구나 촛불과는 달리 빛이 퍼지지 않고 일정한 방향으로 진행하므로 집광렌즈를 사용하여 광선을 모으면 초점 부위에서 단위면적이 높은 에너지를 얻을 수 있다. 이 에너지가 수분으로 구성된 생물체에 작용하면 순간적으로 수분이 증발하므로 조직이 기화 소멸하게 되는데, 이러한 원리를 수술에 이용하는 것이다. 레이저는 수술칼 대신 조직을 자를 수 있고 조직을 증발시키기도 한다. 레이저수술의 장점은 출혈이 없는 수술이 가능하므로 병터를 정확하게 없앨 수 있고, 구강-후두 등 기능 보존이 필요한 미세수술이 가능하며, 수술 후 염증이 가벼워 통증이 적고 흉터가 적으며 입원기간이 짧거나 필요하지 않을 수도 있다는 점이다. 단점은 수술칼이나 전기메스보다 절개속도가 느리고, 레이저광선이 수술부위 이외의 곳에 닿지 않도록 주의해야 하며, 전신마취를 하는 경우에는 특수한 마취튜브를 사용해야 한다는 점이다. |
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| LASER | Light Amplication by Stimulated Emission of Radiation |
|---|---|
| LASER | light amplification by stimulated emission of radiation |
| lase | To cut, divide, or dissolve a substance, or to treat an anatomical structure, with a laser beam. (05 Mar 2000) |
|---|---|
| Lasegue | Ernest C., French physician, 1816-1883. See: Lasegue's disease, Lasegue's sign, Lasegue's syndrome. (05 Mar 2000) |
| Lasegue's disease | An obsolete eponym for delusions of persecution. (05 Mar 2000) |
| Lasegue's sign | <clinical sign> When patient is supine with hip flexed, dorsiflexion of the ankle causing pain or muscle spasm in the posterior thigh indicates lumbar root or sciatic nerve irritation. (05 Mar 2000) |
| Lasegue's syndrome | <syndrome> In conversion hysteria, inability to move an anaesthetic limb, except under control of the sight. (05 Mar 2000) |
| laser | A medical instrument that produces a powerful beam of light and can produce intense heat when focused at close range. Lasers are often used in surgery to vaporize damaged cell tissue. (16 Dec 1997) |
| laser angioplasty | <cardiology, procedure> A technique utilizing a laser coupled to a catheter which is used in the dilatation of occluded blood vessels. This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the laser energy directly ablates the occlusion. One form of the latter approach uses an excimer laser which creates microscopically precise cuts without thermal injury. When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty (angioplasty, balloon, laser-assisted). (05 Mar 2000) |
| laser coagulation | The coagulation of tissues using lasers. These lasers produce light in the visible green wavelength that is selectively absorbed by haemoglobin, and thus it is possible to seal bleeding blood vessels. (12 Dec 1998) |
| laser fusion | <radiobiology> Form of inertial confinement fusion where laser beams are used to compress and heat the fuel pellet. (09 Oct 1997) |
| laser interferometer | <radiobiology> An interferometer which uses a laser as a light source. Because of the monochromatic nature and high brightness of laser light, laser interferometers can operate with much longer beam paths and path differences than conventional interferometers. (09 Oct 1997) |
| laser iridotomy | Peripheral iridectomy as performed by laser.This is a refinement of the surgical technique devised in 1858 by von Graefe. In acute glaucoma the aqueous humor cannot flow freely around the lens and through the pupil to be absorbed in the angle of the anterior chamber. Laser peripheral iridectomy corrects this problem by producing a small hole in the iris to permit aqueous flow. The procedure takes only a few seconds and employs a laser attached to a slit lamp. (05 Mar 2000) |
| laser microscope | <instrument> A microscope in which a laser beam is focused on a microscopic field, causing it to vaporise; the emitted radiation is analyzed by means of a microspectrophotometer; at a low intensity the laser is employed as the light source in an interference microscope. (05 Mar 2000) |
| laser surgery | A type of operation using the cutting powers of laser beams from various sources. The use of a laser either to vaporise surface lesions or to make bloodless cuts in tissue. It does not include the coagulation of tissue by laser (laser coagulation). (12 Dec 1998) |
| laser trabeculoplasty | An operation for glaucoma in which laser energy is applied to trabecular meshwork.a procedure in which a laser (usually argon) is used to create small openings in the trabecular network of the eye. This improves the flow of the aqueous humor and relieves pressure owed to open-angle glaucoma, although by what precise mechanism is not known. LTP has proven effective with only certain types of glaucoma (especially capsular and pigmentary glaucomas), and is sometimes used in conjunction with laser iridotomy. Investigations into laser treatments of open-angle glaucoma began in the early 1970s, but not until the late 1980s was LTP adopted as a standard treatment for the condition, with a 2-year success rate of over 70% (dropping to 50% after 5 years). LTP lessens chances of postoperative infection and haemorrhaging, and can be performed on an outpatient basis. LTP joins other laser techniques that have radically altered eye surgery since their advent. (05 Mar 2000) |
| laser-assisted balloon angioplasty | <cardiology, procedure> Techniques using laser energy in combination with a balloon catheter to perform angioplasty. These procedures can take several forms including: 1. Laser fibre delivering the energy while the inflated balloon centres the fibre and occludes the blood flow. 2. Balloon angioplasty immediately following laser angioplasty. 3. Laser energy transmitted through angioplasty balloons that contain an internal fibre. (05 Mar 2000) |
Synonyms : Coagulation, Laser, Coagulations, Laser, Laser Coagulations, Laser Thermocoagulations, Thermocoagulations, Laser
Synonyms : Scanning Cytometry, Laser
Synonyms : Laser Knives, Knife, Laser, Knives, Laser, Laser Scalpels, Laser Vaporization, Laser Vaporizations, Scalpel, Laser, Scalpels, Laser, Vaporizations, Laser
Synonyms : Laser Therapy, Low-Power, Low-Level Laser Therapy, Low-Power Laser Irradiation, Low-Power Laser Therapy, Biostimulation, Laser, Irradiation, Low-Power Laser, Laser Irradiation, Low Power, Laser Therapies, Low-Level, Laser Therapies, Low-Power
Synonyms : Doppler Laser Flowmetry, Flowmetry, Doppler-Laser, Flowmetry, Laser Doppler, Laser Doppler Flowmetry, Laser Doppler Velocimetry, Velocimetry, Laser Doppler
| laser |
an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light
출처: wordnet.princeton.edu/perl/webwn
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| laser-Doppler velocimetry |
measurement of the flow of red cells in a microcirculatory bed by means of laser light delivered to and detected from the region of interest by fiberoptic probes.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| laser |
A laser (Light Amplification by Stimulated Emission of Radiation) is a device which uses a quantum mechanical effect, stimulated emission, to generate a coherent beam of light from a lasing medium of controlled purity, size, and shape. The output of a laser may be a continuous, constant-amplitude output (known as CW or continuous wave), or pulsed, by using the techniques of Q-switching, modelocking, or gain-switching. In pulsed operation, much higher peak powers can be achieved. ...
출처: en.wikipedia.org/wiki/Laser
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| lase |
A laser (Light Amplification by Stimulated Emission of Radiation) is a device which uses a quantum mechanical effect, stimulated emission, to generate a coherent beam of light from a lasing medium of controlled purity, size, and shape. The output of a laser may be a continuous, constant-amplitude output (known as CW or continuous wave), or pulsed, by using the techniques of Q-switching, modelocking, or gain-switching. In pulsed operation, much higher peak powers can be achieved. ...
출처: en.wikipedia.org/wiki/Lase
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| Lasegue's sign |
in sciatica, flexion of the hip is painful when the knee is extended, but painless when the knee is flexed. This distinguishes the disorder from disease of the hip joint. Cf. Demianoff's s.
출처: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| lase | (Light Amplification by Stimulated Emission of Radiation) optical device that produces an intense monochromatic beam of coherent light |
|---|---|
| lase | a beam of light generated by a laser |
| lase | electrostatic printer that focuses a laser beam to form images that are transferred to paper electrostatically |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|
