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Urinary retention is an inability to completely empty the bladder. [1] Onset can be sudden or gradual. [1] When of sudden onset, symptoms include an inability to urinate and lower abdominal pain. [1]
In flaccid bladder (also known as lower motor neuron or hypotonic bladder), the muscles of the bladder lose ability to contract normally. This can cause the inability to void urine even if the bladder is full and cause a large bladder capacity. The internal urinary sphincter can contract normally, however urinary incontinence is common.
[37]: p. 219 In freshwater fish the bladder is a key site of absorption for many major ions [46] in marine fish urine is held in the bladder for extended periods to maximise water absorption. [46] The urinary bladders of fish and tetrapods are thought to be analogous while the former's swim-bladders and latter's lungs are considered homologous.
Without diagnostic evaluation, the cause of underactive bladder is unclear, as there are multiple possible causes. UAB symptoms can accurately reflect impaired bladder emptying due either to DU or obstruction (normal or large storage volumes, elevated post-void residual volume), or can result from a sense of incomplete emptying of a hypersensitive bladder (small storage volumes, normal or ...
A urethral stricture is a narrowing of the urethra, the tube connected to the bladder that allows urination. The narrowing reduces the flow of urine and makes it more difficult or even painful to empty the bladder. [1] Urethral stricture is caused by injury, instrumentation, infection, and certain non-infectious forms of urethritis. The ...
Weak bladder muscles, resulting in incomplete emptying of the bladder, or a blocked urethra can cause this type of incontinence. Autonomic neuropathy from diabetes or other diseases (e.g. Multiple sclerosis ) can decrease neural signals from the bladder (allowing for overfilling) and may also decrease the expulsion of urine by the detrusor ...
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Vesical tenesmus refers to the feeling of incomplete emptying of the bladder following urination. When the word tenesmus is used without modification, it usually refers to rectal tenesmus . Vesical tenesmus is caused by urogenital diaphragm muscle spasms.