| Emmet's needle | <instrument, surgery> A strong needle with the eye in the point, having a wide curve, and set in a handle, used to pass a ligature around an undissected structure. (05 Mar 2000) |
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| Tuohy needle | A needle with a lateral opening at the distal end, designed to cause a catheter passing through the needle's lumen to exit laterally at a 45 |
| exploring needle | A strong needle with a longitudinal groove, which is thrust into a tumour or cavity to determine the presence of fluid, the latter escaping externally along the groove. (05 Mar 2000) |
| knife needle | A very narrow, needle-pointed knife used in discission of a cataract. Synonym: cataract needle. (05 Mar 2000) |
| fine needle aspiration | Procedure to remove cells or fluid from tissues using a needle with an empty syringe. Cells or breast fluid is extracted by pulling back on plunger and then is analysed by a physician. (09 Oct 1997) |
| fine needle biopsy | Removal of tissue or suspensions of cells through a small needle. (05 Mar 2000) |
| Francke's needle | A small lancet-shaped spring-activated needle, used to evacuate a small effusion of blood. (05 Mar 2000) |
| Frazier's needle | A needle for draining lateral ventricles of brain. (05 Mar 2000) |
| lumbar puncture needle | A needle, provided with a stylet, for entering the spinal canal or cisterna magna, with a bore of at least 1 mm and 40 mm or more in length. (05 Mar 2000) |
| acute reflex bone atrophy | Atrophy of bones, commonly of the carpal or tarsal bones, following a slight injury such as a sprain. See: causalgia, reflex sympathetic dystrophy. Synonym: acute reflex bone atrophy, posttraumatic osteoporosis, Sudeck's syndrome. Origin: L. English sweat (05 Mar 2000) |
| air-bone gap | The difference between the threshold for hearing acuity by bone conduction and by air conduction. (05 Mar 2000) |
| Albrecht's bone | A small bone between the basioccipital and basisphenoid. (05 Mar 2000) |
| alveolar bone | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |
| alveolar bone loss | The resorption of bone in the supporting structures of the maxilla or mandible as a result of periodontal disease. (12 Dec 1998) |
| alveolar supporting bone | alveolar process |