Exchange, gas
Exchange, gas: The primary function of the lungs involving the transfer of oxygen from inhaled air into the blood and the transfer of carbon dioxide from the blood into the exhaled air.
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- Excimer laser
Excimer laser: A laser that emits very concentrated light in the ultraviolet (UV) region of the spectrum. Excimer lasers are used, for example, in: Ophthalmology — to vaporize part of the surface layer of the cornea and thus reshape the cornea to correct refractive errors from myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. Dermatology — to […]
- Excise
Excise: To cut out entirely. For example, a scalpel or laser beam may be used to excise a tumor. The terms excise and resect are not synonymous. Excise implies total removal, whereas resect does not.
- Excision
Excision: 1. Surgical removal, as in the excision of a tumor. 2. The removal as if by surgery, as in excision of a tumor; implying at least partial, if not complete, removal.
- Excisional
Excisional: Pertaining to the act of excision, of removal by surgery. An excisional biopsy is one in which the lesion is removed by the biopsy. From the Greek ektome meaning excision.
- Excisional biopsy
Excisional biopsy: A biopsy in which an entire lesion is removed. A excisional biopsy is in contrast to an incisional biopsy in which only a sample of tissue is cut from a mass (incised) and removed.