Which uroflow pattern is expected in a patient with incomplete emptying?

Which uroflow pattern is expected in a patient with incomplete emptying?

• A. Intermittent flow pattern
• B. Explosive flow pattern
• C. Short bell shape curve flow pattern
• D. Long bell shape curve flow pattern

Answer: (A)

When a bladder doesn’t empty smoothly, the uroflow curve tends to reflect that the flow starts, then pauses, then starts again. This fragmented or bursty flow happens because the detrusor muscle isn’t able to sustain a continuous contraction or there’s imperfect coordination with the outlet, so you get intermittent bursts of urine rather than a steady stream. That intermittent pattern is a hallmark of incomplete emptying, since the bladder repeatedly overcomes resistance only to pause and then begin again, leading to a choppy curve. In contrast, an explosive, uninterrupted peak implies a strong, continuous contraction with little outlet resistance, which doesn’t match incomplete emptying. Bell-shaped curves describe the overall smoothness and duration of flow; a short bell or a long bell doesn’t specifically capture the fragmentation seen with incomplete emptying, so they’re less characteristic than the intermittent pattern.

When a bladder doesn’t empty smoothly, the uroflow curve tends to reflect that the flow starts, then pauses, then starts again. This fragmented or bursty flow happens because the detrusor muscle isn’t able to sustain a continuous contraction or there’s imperfect coordination with the outlet, so you get intermittent bursts of urine rather than a steady stream. That intermittent pattern is a hallmark of incomplete emptying, since the bladder repeatedly overcomes resistance only to pause and then begin again, leading to a choppy curve.

In contrast, an explosive, uninterrupted peak implies a strong, continuous contraction with little outlet resistance, which doesn’t match incomplete emptying. Bell-shaped curves describe the overall smoothness and duration of flow; a short bell or a long bell doesn’t specifically capture the fragmentation seen with incomplete emptying, so they’re less characteristic than the intermittent pattern.