What are the three categories of LUTS symptoms?
storage, voiding and post micturition
What is stress incontinence defined as?
involuntary leakage of urine on effort or exertion, sneezing or coughing
What is urge incontinence defined as?
involuntary leakage accompanied by or immediately preceded by urgency
What is included on storage symptoms in LUTS?
stresss, urge and mixed incontinence
urgency, increased frequency and nocturia
What are included in voiding symptoms?
straining
terminal dribble
slow stream
intermittent stream
hesitancy
What are post micturition symptoms?
incomplete emptying sensation
post micturition dribble
What is the prevalence of UI?
13-35%
When is the highest prevlance of UI?
60s
What is the most common type of UI?
stress
What is overactive bladder?
urgency +/- urge incontinence usually with nocturia and frequency in the absence of UTI or other pathology
what proportion of OAB have stress incontinence also?
1/3
What are the risk factors for UI?
smoking
age
BMI
parity forceps > NVD > CS
hysterectomy
menopause
Why is smoking a risk factor for UI?
coughing and collagen reduction
How do we know estrogen receptors in the LUT effect continence?
urodynamics change in the menstrual cycle
rise in LUTS >70y
improves with ovestin
How many layers of muscle are there of the bladder wall, what are they?
3
inner and outer are longitudinal
middle, circular oblique
What is the nerve involved in bladder filling? what receptors and neuro chemical is used
detrusor relaxation
sympathetic relaxation by the hypogastric nerve
T10-L2
adrenaline/NA
Beta 3 receptors
What nerve is involved in bladder voiding? what receptors and neuro chemical is used
Detrusor contraction
parasympathetic
pelvic splanchnic nerves
S2-4
acetyl choline
M3 receptors
What is the embryological origin of the bladder trigone?
the mesonephric ducts eg wolffian ducts
What receptors are found in the bladder trigone?
noradrenergic
What receptors are found in the bladder (apart from the trigone)?
cholinergic receptors
Where does the urethra pass from and to?
the bladder neck to the external urethral meatus
What are the three layers of the urethra?
inner - mucosal and submucosal
middle - smooth muscle
outer - striated muscle
What is the external urethral sphincter made up of?
spans 60% of the urethra length, made of circular striated muscle
What controls the EUS?
pudendal nerve - tonically contracted