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Distal ureteric anatomy. In the presence of a significant post-micturition residue the upper tracts may decompensate with hydroureter and hydronephrosis. 12): 1. 2. 3. 4. 5. Voided volume Maximum flow rate Average flow rate Flow pattern Post-void bladder residue (an empty bladder has Ͻ20 ml). 04 05/04/2002 11 39 am Page 34 TRANSRECTAL ULTRASOUND OF THE NORMAL PROSTATE GLAND Test conditions need to be optimised for reliable flowmetry. Pre-micturition bladder volumes need to in excess of 200 ml, and preferably more, so that the patient has a strong desire to void.
Dilated ducts, subcapsular fluid collections. This is a non-specific finding, which is said to be associated with chronic prostatitis. 11). The capsule and the periprostatic fat planes are intact and the nodule is well defined. Occasionally the nodule is hypoechoic and indistinguishable from prostate cancer. Its close clinical and sonographic resemblance to prostate cancer is of major importance in ultrasonography. 9 A colour Doppler picture showing markedly distended periprostatic veins in a man with chronic prostatitis.
The bladder neck is normal (asterisk), and the seminal vesicles are seen to enter the base of the gland at an acute angle (arrowhead). The arrow points to the pubic symphysis and the attachments of the levator ani muscles. This sometimes makes size measurement difficult. 9). 8 Transverse/axial view of the triangular-shaped verumontanum (arrow). 9 A view taken using a true longitudinal/sagittal probe. Note the flattened appearance of the gland. 2. 10). There should be little parenchymal flow, and even then it usually follows the margins of the surgical capsule.