| obstructive sleep apnoea | A form of sleep apnoea which occurs as the result of a physical occlusion of the oropharyngeal airway during sleep. (27 Sep 1997) |
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| obstructive thrombus | A thrombus due to obstruction in the vessel from compression or other cause. (05 Mar 2000) |
| obstructive uropathy | <nephrology, urology> A sudden disorder which results in the complete blockage of urine flow out the bladder and/or urethra. Pressure rises in the urinary tract causing a backward pressure on the kidneys. Bilateral hydronephrosis (kidney enlargement), hypertension and damage to the kidneys (acute renal failure) will occur if the obstruction is not relieved. Causes include prostate disease, tumours and cystocele. Origin: Gr. Pathos = disease (27 Sep 1997) |
| obstruent | Causing obstruction; blocking up; hindering; as, an obstruent medicine. Origin: L. Obstruens, p.pr. Of obstruere. See Obstruct. Anything that obstructs or closes a passage; especially, that which obstructs natural passages in the body; as, a medicine which acts as an obstruent. Source: Websters Dictionary (01 Mar 1998) |
| obtected | 1. Covered; protected. 2. <zoology> Covered with a hard chitinous case, as the pupa of certain files. Origin: L. Obtectus, p.p. Of obtegere to cover over. Source: Websters Dictionary (01 Mar 1998) |
| obtund | To dull or blunt, especially to blunt sensation or deaden pain. Origin: L. Ob-tundo, pp. -tusus, to beat against, blunt (05 Mar 2000) |
| obtunded | Mentally dulled. Head trauma may obtund a person. (12 Dec 1998) |
| obtundent | <medicine> A substance which sheathes a part, or blunts irritation, usually some bland, oily, or mucilaginous matter; nearly the same as demulcent. Origin: L. Obtundens, p.pr. Of obtundere. Source: Websters Dictionary (01 Mar 1998) |
| obtunder | <medicine> That which obtunds or blunts; especially, that which blunts sensibility. Source: Websters Dictionary (01 Mar 1998) |
| obturating embolism | Complete closing of the lumen of a vessel by an embolism. (05 Mar 2000) |
| obturation | Obstruction or occlusion. Origin: see obturator Intermittent self-obturation, passage of a blunt object in a lumen or meatus to occlude it or to dilate it. (05 Mar 2000) |
| obturator | 1. That which closes or stops an opening. 2. <surgery> An apparatus designed to close an unnatural opening, as a fissure of the palate. Origin: NL, fr. L. Obturare to stop up: cf.F. Obturateur. <anatomy> Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve. <anatomy> Obturator foramen, an opening situated between the public and ischial parts of the innominate bone and closed by the obturator membrane; the thyroid foramen. Source: Websters Dictionary (01 Mar 1998) |
| obturator appliance | An appliance used to obliterate congenital or acquired defects of the jaws and surrounding structures, usually made of acrylic or rubber. (05 Mar 2000) |
| obturator artery | <anatomy, artery> Anastomoses, iliolumbar, inferior epigastric, medial circumflex femoral; origin, anterior division of the internal iliac; distribution, ilium, pubis, obturator and adductor muscles; branches, pubic, acetabular, anterior, and posterior. Synonym: arteria obturatoria. (05 Mar 2000) |
| obturator canal | The opening in the superior part of the obturator membrane through which the obturator nerve and vessels pass from the pelvic cavity into the thigh. Synonym: canalis obturatorius. (05 Mar 2000) |