| urethral dilation | Increasing the caliber of the urethra by passage of a dilator. (05 Mar 2000) |
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| post-stenotic dilation | Dilation of an artery, most commonly the pulmonary artery or the aorta, distal to an area of narrowing. (05 Mar 2000) |
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| pupillary dilation | <ophthalmology> The action of stretching or enlarging the pupil for example by atropine. (18 Nov 1997) |
| dilation | The process of enlargment or expansion. The word dilatation means the same thing. Both come from the Latin dilatare meaning to enlarge or expand. (12 Dec 1998) |
| dilation and curettage | Dilation of the cervix and curettement of the endometrium. Acronym: D&C (05 Mar 2000) |
| dilation and evacuation | Dilation of the cervix and removal of the products of conception. Acronym: D&E (05 Mar 2000) |
| dilation thrombosis | Thrombosis due to slowed circulation consequent upon dilation of a vein. (05 Mar 2000) |
| acute urethral syndrome | <syndrome> This describes a clinical syndrome of dysuria (pain on urination) with sterile or low bacterial colony count culture results. Many of these patients have early or low-grade E. Coli, Staphylococcal saprophyticus or Chlamydia trachomatis infections. All are treated with antibiotics. (27 Sep 1997) |
| anterior urethral valve | A crescentic horizontal fold in the proximal spongy urethra. (05 Mar 2000) |
| posterior urethral valves | Anomalous folds occurring at the level of the seminal colliculus. Synonym: Amussat's valvula. (05 Mar 2000) |
| preprostate urethral sphincter | The complete collar of smooth muscle cells of the neck of the urinary bladder which extend distally to surround the preprostatic sportion of the male urethra. There is not a comparable structure in the neck of the femoral bladder; the internal urethral sphincter may exist to prevent reflux of semen into bladder. Synonym: annulus urethralis, internal urethral sphincter, musculus sphincter vesicae, preprostate urethral sphincter, proximal urethral sphincter, sphincter muscle of urinary bladder. (05 Mar 2000) |
| proximal urethral sphincter | The complete collar of smooth muscle cells of the neck of the urinary bladder which extend distally to surround the preprostatic sportion of the male urethra. There is not a comparable structure in the neck of the femoral bladder; the internal urethral sphincter may exist to prevent reflux of semen into bladder. Synonym: annulus urethralis, internal urethral sphincter, musculus sphincter vesicae, preprostate urethral sphincter, proximal urethral sphincter, sphincter muscle of urinary bladder. (05 Mar 2000) |
| internal urethral opening | The internal opening or orifice of the urethra, at the anterior and inferior angle of the trigone. Synonym: ostium urethrae internum, internal urethral opening. (05 Mar 2000) |
| internal urethral orifice | The internal opening or orifice of the urethra, at the anterior and inferior angle of the trigone. Synonym: ostium urethrae internum, internal urethral opening. (05 Mar 2000) |
| internal urethral sphincter | The complete collar of smooth muscle cells of the neck of the urinary bladder which extend distally to surround the preprostatic sportion of the male urethra. There is not a comparable structure in the neck of the femoral bladder; the internal urethral sphincter may exist to prevent reflux of semen into bladder. Synonym: annulus urethralis, internal urethral sphincter, musculus sphincter vesicae, preprostate urethral sphincter, proximal urethral sphincter, sphincter muscle of urinary bladder. (05 Mar 2000) |
| external urethral orifice | The slitlike opening of the urethra in the glans penis, the external orifice of the urethra (in the female) in the vestibule, usually upon a slight elevation, the papilla urethrae. Synonym: ostium urethrae externum, external opening of urethra, meatus urinarius, orificium urethrae externum. (05 Mar 2000) |