Which of the following events would suggest that an individual's physiologic response to an obstruction has progressed beyond the compensatory stage and is now in the decompensatory stage?
A) The bladder muscle hypertrophies.
B) The detrusor loses its power of contraction.
C) The ability to suppress urination is diminished.
D) The individual experiences urgency.
Ans: B
Feedback:
The compensatory stage of the response to a bladder obstruction involves hypertrophy of the bladder wall, urgency, and difficulty suppressing the urge to urinate. If these compensatory measures are ineffective, decompensation occurs. The period of detrusor muscle contraction becomes too short to expel the urine completely, and residual urine remains in the bladder. At this point, the symptoms of obstruction—frequency of urination, hesitancy, need to strain to initiate urination, a weak and small stream, and termination of the stream before the bladder is completely emptied—become pronounced.
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