A medical instrument used to measure the capacity, pressure, and function of the bladder.
From Greek 'kystis' (bladder) combined with '-meter' (measuring instrument). This diagnostic device was developed in the late 19th century to evaluate bladder function objectively.
Cystometers helped doctors move from just asking 'does it hurt?' to actually measuring bladder pressure and capacity—it's the difference between guessing and science!
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