title: An ultrasonic bladder-volume sensor.
mesh_terms: D004582:Electronics, Medical / Q000295:instrumentation; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation*; D014463:Ultrasonography; D001750:Urinary Bladder, Neurogenic / Q000503:physiopathology*; D014554:Urination