Micturition Disorders Flashcards
What receptors allow for passive filling phase of the urinary cycle to take place?
Passive phase activated by beta receptors- allows stretching
How is the active phase of the urinary cycle initiated?
Stretch receptors activated –> pelvic nerve stimulated –> travels to spinal cord –> brain stem and then PSNS outflow
What nerve is inhibited in the active phase of the urinary cycle decreasing urethral sphincter tone?
Pudendal nerve
What drug is used for an UMN bladder?
Baclofen-inhibitory neurotransmitter-SM relaxant
What are characteristics of UMN bladder?
Small bladder, small volumes of urine produced, difficult to express
What are characteristics of LMN bladder?
large bladder, easily expressed, constantly leaks, sacral spinal cord segment or pelvic segment
What drug is used for a patient with LMN bladder?
Bethanecol
What is the main concern in a patient with dysautanomia?
GI dz
What are the drugs used for a patient with detrusor instability/detrusor hyperreflexia?
Anticholinergic-oxybutynin, imipraine or dicyclomine
What is defined as the involuntary escape of urine during the storage phase?
Urinary incontinence
T/F: in a patient with urinary incontinence, the intravascular pressure is greater than the urethral pressure
TRUE
What is the most common cause of urinary incontinence?
Urinary sphincter mechanism incompetence
Why are spayed bitches more prone to urinary incontinence ?
Lack of estrogen decreases sensitivity of smooth muscle receptors to SNS
