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 ?
Major pain-causing diseases or disorders among patients that can be efficiently treated with radiofrequency ablation include diabetic neuropathy, complex regional syndrome, sacroiliac pain, and other specific conditions such as disc herniation.
Percutaneous radiofrequency ablation of hepatic metastases from colorectal cancer: Long-term results in 117 patients.
Percutaneous radiofrequency ablation of lung tumors with expandable needle electrodes: Tips from preliminary experience.
This research shows that CT-guided radiofrequency ablation effectively destroys cancer cells inside the lung without surgery," says radiologist Riccardo Lencioni, M.
In March 2000, RITA became the first radiofrequency ablation company to receive specific FDA clearance for unresectable liver lesions in addition to its previous general FDA clearance for the ablation of soft tissue.
The Venefit[TM] procedure (using the ClosureFast radiofrequency ablation catheter) was used to treat 295 lower limbs in 225 patients diagnosed with superficial venous reflux, the underlying cause of varicose veins and CVI.
1 - to 22 000 BGN without VAT, including the value of the number one device for radiofrequency ablation for complex treatment of veins with associated consumables and accessories as well as services for installation, putting into operation and perform warranty during its warranty period;
Effect of Radiofrequency Ablation (RFA) Dwell Time (+/-) ThermoDox on Safety and Overall Survival (OS) Among 452 Intermediate Solitary HCC Patients With Lesions 3 to 7 cm: HEAT Study Data," by Professor Won Young Tak, MD, Ph.
com/research/2mzgt5/global) has announced the addition of the "Global Radiofrequency Ablation Devices Market Assessment & Forecast: 2015-2019" report to their offering.
Radiofrequency ablation technology commands the largest share in the oncology ablation in 2014; whereas, microwave ablation is expected to grow at a highest CAGR during 2014 to 2020.
Radiofrequency ablation for high-grade dysplasia in the setting of Barrett's esophagus is more cost effective than endoscopic surveillance until progression to cancer, according to a report by Dr.