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Kell blood group

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(kel) [Named after the family in whom the blood group was first discovered in 1946] One of the human blood groups. It is composed of three forms of antigens present on the surface of the red blood cells. SEE: blood group.

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keloid

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(kē′loyd″) [kelis or Gr. chēlē, claw + -oid] An exuberant scar that forms at the site of an injury or incision and spreads beyond the borders of the original lesion. The scar is made up of a swirling mass of collagen fibers and fibroblasts. Grossly it appears to have a shiny surface and a rubbery consistency. The most common locations for keloid formation are on the shoulders, chest, and back. SEE: illus.

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KELOID

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TREATMENT: The injection of a corticosteroid sometimes helps the lesion regress. Freezing the tissue with liquid nitrogen, applying pressure dressings, treating it with lasers, excising it, or a combination of these treatments may be used, but recurrences are frequent.

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acne k. A keloid that develops at the site of an acne pustule.

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keloidosis

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(kē″loyd″ō′sĭs) [keloid + -osis] The formation of keloids.

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kelp

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(kelp) 1. Any member of the brown seaweeds of the order Laminariales. 2. The ash of seaweed from which potassium and iodine salts are prepared.

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Kelvin, Lord

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(kel′vĭn) Sir William Thomson (First Baron Kelvin of Largs), Brit. physicist, 1824–1907.

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K. scale The temperature scale that uses the kelvin as the unit of measurement and in which absolute zero is equal to minus 273.15° on the Celsius scale. On the Kelvin scale the freezing point of water is 273.15°K, and the boiling point 373.15°K.

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K. thermometer A thermometric scale in which absolute zero is 0°K; the freezing point of water is 273.15°K; and the boiling point of water is 373.15°K. Thus 1°K on the Kelvin scale is exactly equivalent to 1°C.

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Kendrick Extrication Device

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(kĕn′drĭk) ABBR: KED. A vest-type immobilizer designed to limit movement of the cervical and thoracic spine in seated patients with suspected spinal cord injuries.

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Kent bundle

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(kent) [Albert Frank Stanley Kent, Brit. physiologist, 1863–1958] Any of the accessory conduction fiber bundles in the heart that rapidly convey atrial impulses across the atrioventricular tissue. They are usually present in the Wolff-Parkinson-White syndrome. SEE: Wolff-Parkinson-White syndrome.

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keratectasia

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(ker″ă-tek-tā′zh(ē-)ă) [kerato- + ectasia] Conical protrusion of the cornea.

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keratectomy

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(ker″ă-tek′tŏ-mē) [kerato- + -ectomy] Excision of a portion of the cornea.

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photorefractive k. ABBR: ...

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