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 ?
12, 2010 - 9:00 AM (Open Communications 25 - Hysteroscopy II): "Concomitant NovaSure Endometrial Ablation and Essure Tubal Sterilization - Review of 100 Cases"
The amenorrhea rate and overall success rate in patients with submucous myomas is similar to that achieved for patients with normal cavities treated by HTA or roller ball endometrial ablation," he said.
Cytyc Corporation (Nasdaq: CYTC) today announced that a total of eight studies evaluating performance of the NovaSure([R]) System for endometrial ablation were presented at the 33rd Annual Meeting of the American Association of Gynecologic Laparoscopists (AAGL) in Las Vegas.
SAN FRANCISCO -- Microwave endometrial ablation stacked up well against rollerball ablation for the treatment of abnormal uterine bleeding in preliminary data from an ongoing randomized, multicenter trial, Dr.
But, for some women, endometrial ablation may not solve their problem.
Channel Medsystems will use the Series C funds to initiate the pivotal study of its cryothermic technology and move closer towards commercialization of the first true, office-based endometrial ablation procedure.
Our next-generation NovaSure system provides feature enhancements that our customers have been requesting while maintaining the efficacy of the NovaSure ablation profile that has proven superior to other endometrial ablation modalities for over 10 years," said Carter Houghton, Hologic's Senior Vice President and General Manager, GYN Surgical Solutions.
NATIONAL HARBOR, MD - A thermal balloon endometrial ablation provided long-lasting benefit to women with dysmenorrhea, with 86% saying the benefits lasted for up to 11 years, and 82% reporting that they needed no further treatment for the condition.
SAN DIEGO -- Both hysterectomy and endometrial ablation were highly effective short-term treatments for dysfunctional uterine bleeding in a randomized, multi-center trial, but about one-third of women who underwent endometrial ablation eventually needed more surgery.
I read with interest the article by Fadare et al (1) concerning the histology of radio-frequency endometrial ablation, especially after reviewing a recent endometrial curettage specimen in our institution from a woman with a prior hydrothermal ablation for menorrhagia.
We believe that this technology offers an exciting opportunity to extend our portfolio of therapeutic products and leverage our OB/GYN sales infrastructure, which has been a critical element in the success we have achieved with the NovaSure Endometrial Ablation System," said Daniel J.
Many women with heavy bleeding who do not have malignant disease or fibroids are candidates for endometrial ablation procedures, in which the uterine lining is destroyed without removal of the uterus.