URODYNAMIC STUDIES

Question 1

The complaint of a delay in initiating micturition

Answer 1

Hesitancy

Question 2

complaint of a urine stream perceived as slower compared to previous voids or in comparison to others

Answer 2

Slow stream

Question 3

complaint of urine flow that starts and stops on one or more occasions during voiding.

Answer 3

Intermittency

Question 3

the complaint of the need to make an intensive effort (by abdominal straining, Valsalva or suprapubic pressure) to either initiate, maintain, or improve urine stream

Answer 3

Straining to void

Question 4

is the complaint that the urine passage is a spray or split rather than a single discrete stream (i.e., when urine flows to different directions).

Answer 4

Spraying (splitting) of the urine stream

Question 5

the time over which measurable urine flow actually occurs. Flow time is expressed in seconds (s).

Answer 5

Flow time

Question 5

the complaint of having to take specific positions to be able to void spontaneously or to improve bladder emptying

Answer 5

Position-dependent micturition

Question 6

the total duration of micturition, including interruptions. When voiding is completed without interruption, voiding time is equal to flow time

Answer 6

Voiding time

Question 7

the total expelled volume via the urethra and expressed in millilitres (mL)

Answer 7

Voided volume (V)

Question 8

defined as the volume of expelled fluid via the urethra per time unit and expressed in millilitres per second (mL/s).

Answer 8

Flow rate (Q)

Question 9

the maximum measured value of the flow rate after correction for artefacts and expressed in mL/s.

Answer 9

Maximum flow rate (Qmax)

Question 10

elapsed time from onset of flow to Qmax and expressed in seconds (s).

Answer 10

Time to maximum flow

Question 11

voided volume divided by flow time, expressed in mL/s

Answer 11

Average flow rate (Qave)

Question 12

Abdominal pressure in the absence of a detrusor contraction

Answer 12

abdominal leak point pressure (ALPP)

Question 13

fluid pressure needed to just open a closed (collapsed) urethra

Answer 13

urethral pressure

Question 14

lowest detrusor pressure at which the patient leaks in the absence of a detrusor contraction or an increase in the abdominal pressure

Answer 14

Detrusor leak point pressure DLPP

Question 15

intravesical pressure at which urine leakage occurs because of increased abdominal pressure in the absence of a detrusor contraction

Answer 15

Abdominal leak point pressur ALPP