Here there is an inability to retain urine, which is discharged involuntarily, and cannot be controlled by the patient.


This may be due to a relaxed or paralytic condition of the muscle which guards the neck of the bladder, and ordinarily prevents the urine from passing out; it may also result from injuries, morbid growths, or the partial blocking with calculi.


If caused by a mechanical impediment it may sometimes be removed by the passage of a catheter into the bladder, or by the forcible injection of fluids from a syringe into the urethral canal. Where a calculus exists in the urethral passage it may require a surgical operation.