Male voiding LUTS + EAU Flashcards
What is the percentage of men above 65 years with LUTS?
30%
How many men with LUTS will undergo prostate surgery?
around 20%
Basic clinical evaluation for LUTS:
History Assesment of symptoms (ex IPSS) Frequency Volume Charts (ex tidsmiktion) Digital Rectal Examination Urinalysis Blood Tests -creatinine/eGFR -PSA Flow rate Post void residue
When it comes to the size of the prostate, how sensitive is Digital Rectal examination?
It can discriminate between prostate volume > or < 50mL
What is a Mildly symptomatic IPSS-score?
1-7
What is a Moderately symptomatic IPSS-score?
8-19
What is a Severly symptomatic IPSS-score?
20-35
Predict prostate size with a PSA of >1,5 ng/mL:
> 30 ng/mL
When should you measure PSA in a patient with LUTS?
If a diagnosis of prostate cancer will change the management
If it assists in the treatment and/or decision making process
Does DRE underestimate or overestimate prostate volume?
underestimates
Why should PVR (post-void residual) be assesed at first clinical visit for a patient with LUTS?
High baseline PVR is predictive for future symptom progression
What information should be included in a bladder diarie?
Voiding frequency Voiding volume Fluid intake Use of pads Activities
What additional tests can be considered when evaluating LUTS?
Pressure flow studies Endoscopy Upper urinary tract US scan Transrectal ultrasound Bladder wall thickness
Lifestyle advice for LUTS:
reduction of fluid intake (not below 1500ml)
moderation of caffeine and alcohol intake
urethral milking to avoid post micturition dribbling
Distraction techniques- breathing exercises, mental tricks
Bladder re-training (to around 400 mls)
How quickly does Alpha 1 adrenoreceptors give effect?
1-2 weeks
What is the effect of Alpha 1 adrenoreceptors on LUTS?
improves symptoms /flow
you can expect an improvement in Qmax by 15-30%
What are the most common side-effects of Alpha 1 adrenoreceptors?
Asthenia
Dizziness (orthostatic)
Hypotention
What Alpha 1 adrenoreceptor is more likely to cause floppy iris syndrome?
Tamsulosin
What are the effects of 5 Alpha reductase inhibitors?
Improves symptoms/flow
Reduce prostate volume
Reduce longer-term risk of AUR and surgery
How quickly does 5 Alpha reductase inhibitors give effect?
6-12 months
How much does 5 Alpha reductase reduce the volume of the prostate?
by 15-25%
How much does 5 Alpha reductase reduce PSA?
50% by 6 months
How big is the risk reduction for surgery because of BPH with 5 Alpha reductase?
55%
How big is the risk reduction for surgery because of AUR with 5 Alpha reductase?
57%
What is the patophysiology behind Antimuscarin drugs?
Main neurotransmitter in the bladder (acetylcholine) stimulates muscarinic receptors of detrusor smooth muscle cells
What type of Muscarin receptor subtype is present in the bladder?
M2 (80%) and M3 (20%) in the detrusor
What is the effect of antimuscarin drugs?
Reduction in:
- voiding frequency
- nocturia
- urge incontinence
- IPSS
What size prostate does antimuscarine drugs have the greatest effect on?
small prostates
What are the most common side effects of antimuscarine drugs?
Dry mouth (<16%)
Constipation (<4%)
Dizziness (<5%)
What LUTS symptom can become worse from antimuscarine treatment?
BOO (PVR can increase, no increase rate of AUR)
What should be included in the follow-up of patients on antimuscarine treatment?
PVR
IPSS
What type of drug i Mirabegron?
An antimuscarine, selective Beta3 receptor agonist
What is the mechanism of Mirabegron?
Mirabegron mediates relaxation of the detrusor muscle during the storage phase of the micturition cycle, thus incereasing bladder storage capacity
What is the drug containing Mirabegron called?
Betmiga
What are the contraindications for Mirabegron?
Not well controlled hypertention
has higher incidence of CV events
What is the mechanism of PDE-5 inhibitors?
NO stimulates synthesis of cyclic GMP which reduces smooth muscle tone of detrusor, prostate and urethra
PDE-5 inhibitors prevent hydrolysis of cyclic GMP
What is the effect on LUTS by PDE-5 inhibitors?
Less storage and voiding symptoms
Significant QoL improvement
What is the improvement on IPSS by PDE-5 inhibitors?
17-37%