De ischuria theses

XIIII.
The neck of the bladder or the duct is obstructed by an inserted stone or by flesh, such as that which sometimes grows after the ulceration of that place, often also by a clot of blood, and hardly ever by other humors.

XV.
It is permissible to explore the cause by inserting a catheter, but the pain and swelling of the pubic area, with an immense desire to urinate, explain the affected place to us.

XVI.
An affection of the substance of the kidneys does not otherwise suppress urine in the least.

XVII.
Nor can defects in the capacity of the bladder retain urine by themselves.

XVIII.
For when it is endowed with no sensation, or a dull one, and for that reason is not stimulated by the urine, the urine nevertheless flows out if there is no other impediment.

XIX.
Even the sphincter of the bladder, since it only retains urine if it is damaged, causes an involuntary urination rather than its suppression.

XX.
Especially if it is relaxed; although if it is convulsed, the urine is not retained for long, but rather is poured out.

XXI.
The indications for the cure of ischuria are taken from the disease, the cause, and the symptom.