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Overview
The Uroflow device is
simply a special urinal that allows the urologist to trace out
your flow pattern and determine such parameters as peak flow,
average flow and total voided volume. We ask that you come to
the office with a partially full bladder and that you continue
drinking fluids on the way to the office so that you will have
to urinate shortly after you arrive. Do not overfill; we are
trying to get a picture in time that is a sample of your current
voiding habits. If you are to full or you try to urinate when
you do not have the urge to we will get incorrect results. If
this occurs then we would have to repeat the study and you will
have to drink fluids for a significant time before you get the
urge again.
We consider a study a good one for evaluation purposes if you
have voided at least 200cc, if you don't have a significantly
large post-void residual volume.
The Post-Void Residual (PVR)
volume is the amount of urine that is left behind in the bladder
after you are done urinating. Normally, there is very little
urine left in the emptied bladder. Those with obstructive outlet
disease such as prostate enlargement or urethral stricture
disease will have much more urine remaining in the bladder after
voiding.
There are two possible ways to determine the PVR, the most
accurate one is using a catheter to empty the bladder, and the
other is the more commonly used technique called the bladder
ultrasound. An ultrasound probe is placed over the bladder and
the PVR is measured through the abdomen after some warm jelly
has been placed on the abdominal wall.
There is absolutely no discomfort associated with this test.
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