No attempt to urinate

74 No attempt to urinate



INTRODUCTION


No attempt to urinate results in urine retention. Overflow of urine may occur but the bladder does not fully empty. In time, a sacral reflex may initiate urination involuntarily but emptying will be incomplete and poorly coordinated with sphincter relaxation. Normal residual volume post-urination is usually less than 10 ml. Affected animals have palpably distended bladders. Ease of expression depends on the sphincter tone. Causes include:


• Cannot perceive bladder distension: lesions of the cerebrum, spinal cord, pelvic nerve or sacral segments (S1–3)

• Does not initiate voluntary urination: cerebral lesion

• Cannot contract bladder: lesion of the detrusor muscle, pelvic nerve, sacral cord, or dysautonomia

• Can perceive bladder distension and can contract bladder wall but is recumbent and cannot assume posture, so will not urinate.


CLINICAL TIP


Rule out anuria or bladder rupture.



SIGNALMENT


An 8-year-old neutered female domestic shorthaired cat.

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Sep 3, 2016 | Posted by in SMALL ANIMAL | Comments Off on No attempt to urinate

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