Incontinence and retention Flashcards
Female urinary bladder can store:
350 ml
Male urinary bladder can store:
450 ml
Histology of urinary bladder:
Outer adventitial layer: connective tissue
Middle smooth muscle: detrusor muscle
Inner: transitional epithelium
Mictuition is controlled by:
Pontine micution center
The sympathetic nervous system acts to:
Retain urine: relax detrusor, contract internal sphincter
The parasympathetic nervous system acts to:
Urinate: contract detrusor
Nerves involved in mictuition:
- Pelvic afferent (sensory)
- Pelvic nerve (PS)
- Hypogastric (S)
- Pudendal (Somatic)
Receptors involved in mictuition:
M3, B3, a1, nicotinic
External urethral spincter is:
Skeletal muscle, under voluntary control
Pelvic and pudendal nerves come from which level of the spinal cord?
S2-S4
Test to look at problems filling and emptying bladder:
Cystometry
Cystometry measures pressures in what:
- Rectum
- Bladder
- Intrinsic bladder pressure (bladder - rectum)
Pressure measurements are measured in synchronicity with:
Flow rate
BPH =
Benign prostatic hypertrophy
BOO =
Bladder outflow obstruction
Types of male lower urinary tract symptoms:
- Voiding
- Storage
Voiding symptoms:
Weak, intermittent stream Staining Hesitancy Incomplete emptying Terminal dribble
Storage symptoms:
- Frequency
- Urgency
- Nocturia
- Incontinence
What is common in men but uncommon in women?
Voiding difficulty
Causes of voiding difficulty:
Increased outflow resistance from obstruction at bladder neck or prostate
Detrusor muscle failure (less likely)
Detrusor muscle failure can be primary or secondary to…
Bladder outflow obstruction
What hormone is though to be involved in cell hypertrophy of prostate?
Dihydrotestosterone
5 a reductase =
Converts testosterone into DHT
What may you see on cystometry of BPH:
Pressure double and only manages to pass half the flow