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 ?
The 1-year direct costs of endometrial ablation were $7,352 and $6,306 in the commercial payer and Medicaid payer perspectives, respectively; these were about half the costs of hysterectomy.
Long-term results in the treatment of menorrhagia and hypermenorrhea with a thermaballoon endometrial ablation technique.
A variety of nonhysteroscopic techniques for endometrial ablation offer safety and efficacy comparable with hysteroscopic techniques, while requiring less technical skill and operative time.
Thermablate EAS: A new Endometrial Ablation System--A fully automated, lightweight & portable system for the treatment of menorrhagia.
Of note, by 48 months, 32 of 110 women who initially underwent endometrial ablation required reoperation, usually hysterectomy.
Widely used in England, endometrial ablation has not been embraced by many American surgeons who believe that these women would eventually have to undergo a hysterectomy anyway.
Another plus for menopausalage women is that the endometrial ablation procedure permits them to take beneficial estrogen hormone supplements without having their menstrual period begin again--a common and annoying side effect of hormone therapy.
One woman had a repeat endometrial ablation, and 20 had hysterectomy, Dr.
Even though global endometrial ablation is becoming increasingly common, radiologists are hard-pressed to describe their findings because there are no data available to allow adequate correlation between ultrasound images, hysteroscopic images, and uterine cavity endometrial sampling.
The majority of women who undergo endometrial ablation are in their reproductive years, so many of them request Essure sterilization to control fertility after or during endometrial ablation," Rafael F.
MIAMI -- A simple office procedure called endometrial ablation may offer an effective solution for women with heavy menstrual periods, according to Dr.
another retrospective cohort study of 968 women who underwent endometrial ablation.