ablation

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ablation

1. Medicine the surgical removal of an organ, structure, or part
2. Astronautics the melting or wearing away of an expendable part, such as the heat shield of a space re-entry vehicle on passing through the earth's atmosphere
3. Geology the wearing away of a rock or glacier

ablation

(ab-lay -shŏn) The loss of material from the surface of a moving body as a result of vaporization, friction, etc. For example, atmospheric atoms and molecules erode the surface of a meteoroid and damage the protective heat shield of a returning space shuttle.

Ablation

 

in glaciology, the wasting of the mass of a glacier or snow cover as a result of thawing, evaporation, or mechanical removal—for example, wind ablation or the falling of icebergs. It is caused chiefly by climatic factors.

Three types of ablation are distinguished according to place of appearance: subglacial (or bottom), internal, and surface. The internal heat of the earth, springs (particularly warm ones) surfacing in the glacier bed, and heat caused by the friction of the glacier in its bed are some of the causes of subglacial ablation. Internal ablation is caused by friction between the glacier components and by the circulation of water and air. The glacier surface receives warmth predominantly from solar radiation and from the air. The thermal balance of the glacier surface is the basis of all surface ablation processes. The term “ablation” is sometimes used as well as a synonym for “surface washoff.”

ablation

[ə′blā·shən]
(aerospace engineering)
The intentional removal of material from a nose cone or spacecraft during high-speed movement through a planetary atmosphere to provide thermal protection to the underlying structure.
(geology)
The wearing away of rocks, as by erosion or weathering.
(hydrology)
The reduction in volume of a glacier due to melting and evaporation.
(medicine)
The removal of tissue or a part of the body by surgery, such as by excision or amputation.
References in periodicals archive ?
Radiofrequency ablation disrupts the ability of nerves to transmit pain signals from an arthritic knee to the brain.
After assessment of the patient, we explained the various neuroablative procedures, like Radiofrequency Ablation, for managing cancer pain.
Radiofrequency ablation of benign cold thyroid nodules: Initial clinical experience.
Multiple clinical studies show radiofrequency ablation significantly reduces pain severity and frequency for one year in majority patients.
In some cases, accessory pathway is usually not dealt simultaneously with Mitral valve replacement by surgical division or Cryoablation or Radiofrequency ablation.
Impedance is an important factor in radiofrequency ablation procedures and its monitoring can be helpful in predicting development of skin burns.
TechNavio's analysts forecast the Global Radiofrequency Ablation Devices market to grow at a CAGR of 18.
However, the radiofrequency ablation devices for hypertension market on account of increasing demand from patients and subsequent increase in R&D initiatives is expected to grow at the fastest CAGR during the forecast period.
However, internationally the method of choice is radiofrequency ablation, which is safe, quick, minimally-invasive and give better results compared to surgery.
Our results were consistent with findings from a study by Lo YS et al13 where nine patients with narrow complex tachycardia underwent radiofrequency ablation.
ORLANDO -- Age, race, and extent of disease treated appear to predict which patients will have a recurrence of Barrett's esophagus after apparently successful radiofrequency ablation, researchers reported at the annual Digestive Disease Week.