Overview 3 Flashcards
Trigone of the bladder is formed from what? x3
Formed from the orifices of the ureters and the urethra
Epithelium of the bladder detrusor muscle is?
Transitional stratified epithelium
Micturition is controlled by what region in the brain?
Pontine micturition centre
Bladder fills with wee - activates what?
Stretch receptors of detrusor muscle
Activation of detrusor stretch muscles results in what?
Feedback to pontine micturition centre
Pontine micturition centre stimulates micturition via what nerve?
Pudendal nerve
Nerve roots of the pudendal nerve are?
S2, 3, 4
Action of pudendal nerve on the bladder is?
Relaxation of the sphincter of the bladder
Micturition pudendal nerve involvement is somatic or autonomic
Somatic - conscious relaxation of the sphincter
Relaxation of bladder sphincter results in activation of what?
Activation of parasympathetic reflex loop from pontine micturition centre
Parasympathetic to bladder nerve and nerve roots?
Parasympathetic pelvic nerves - S2, 3, 4
Detrouser muscle contraction involves what neurotransmitter?
Ach
Detrouser muscle contraction involves what neurotransmitter receptor?
ACh M3
Four stages of the bladder cycle are?
Bladder filling
First sensation to void
Normal desire to void
Bladder filling
Two modes of the bladder cycle are?
Storage phase
Emptying phase
Bladder spends most of the time in which stage of the bladder cycle?
Storage phase
Normal outflow of urine per day is?
1500ml of urine
Potential lower urinary tract symptoms? x4
Frequency/urgency/nocturia
Hesitancy/poor flow
Haematuria
Terminal dribbling
Main symptoms of overactive bladder syndrome? x3
Urgency - with or without incontinence
Frequency
Nocturia
Lower urinary tract symptoms are due to problems in which stage of the bladder cycle?
Storage phase
How can prostate symptoms be measured? (scoring system name)
Internation prostate symptom score (IPSS)
Score for mild IPSS?
0-7
Score for moderate IPSS?
8-19
Score for severe IPSS?
20-35
Benign prostate hyperplasia has what effect on the anatomy of the bladder?
Detrusor muscle hypertropies to compensate
Effect of BHP on the physiology of the bladder?
Hypertrophied detrusor muscle increases pressure - kidney damage
Too little fluid consumption has what effect on the bladder?
Too little - toxic concentration of urine irritates the bladder
Method to aid fluid management?
Voiding diary
Effect of caffeine consumption on bladder contraction?
Increases likelihood of bladder contraction
How does calcium act as a diuretic?
Releases calcium stores from the golgi body in the bladder wall
What is the effect of acidic drinks on the bladder?
Can irritate the bladder
Medical therapy for urinary problems x5
alpha blockers 5-alpha reductase inhibitors PDE5 inhibitors Antimuscarinincs Combination
What would antimuscarinics be used to treat?
OAB
Finasteride is a?
5-alpha reductor inhibitor
Caffeine causes the release of calcium from which organelle in the cells of the bladder wall?
Golgi apparatus
Tamsulosin is a?
Alpha-blocker
Doxazosin is a?
Alpha-blocker
Dutasteride is a?
5-alpha reductor inhibitor
Terazosin is a?
Alpha-blocker
How to alpha-blockers treat BHP?
Relaxation of the smooth muscle of the bladder and the prostate to pass urine more easily
How to 5-alpha reductase inhibitors treat BHP?
Prevent further growth of the prostate gland and aim to shrink it
5-alpha reductor inhibitors and alpha blockers are both used in the treatment of?
BHP
Gold standard surgical treatment for LUTS?
Transurethral resection of the prostate
Three types of urinary incontinence are?
Stress UI
Urge UI
Mix of the two
What is stress UI?
Leakage on effort or exertion i.e. increased abdominal pressure
What is urge UI?
Leakage accompanied by urgency
Treatment for stress UI?
Surgery
Treatment for urge UI?
Medication
Two nerves that can be stimulated for the treatment of UI are?
Posterior tibial
Sacral
Three medications that can be used for UI/OAB?
Anticholinergics
B3 adrenergics
Botox
What is the real name of botox?
Botulinum toxin A
Vaginal cones can be used in the treatment of what type of UI?
Stress
Neurological lesions between which two regions can lead to micturition problems?
Between the micturition centre in the pons and T12
What is acromegaly?
Excessive release of GH in the pituitary gland
First presentation of acromegaly is?
Enlargement of the hands and feet
Most common cause of acromegaly is?
Pituitary adenoma
GH is released from where?
Pituitary gland
Release of GH is stimulated by what hypothalamic hormone
GHRH
Release of GH is inhibited by what hormone?
Somatostatin
GH causes the release of what?
Insulin like growth factor
IGF-1
GH causes release of IGF-1 in which three regions?
Liver
Bone
Muscle
Negative feedback to GH release is mediated by what?
IGF-1 release from the liver
General function of diuretic?
Increase urinary sodium and water loss
General mechanism of action of diuretic?
Reduces reabsorption of sodium at different sites of the nephron
Five classes of diuretic are?
Carbonic anhydrase inhibitor Loop Thiazide Potassium sparing Osmotic
Acetazolamide is?
Carbonic anhydrase inhibitor
Acetazolamide has function where in the kidney?
Proximal convoluted tubule
How commonly are carbonic anhydrase inhibitors used and why?
Weak diuretic - not commonly used anymore
Acetazolamide main uses? x3
Glaucoma
Epilepsy
Mountain sickness
Side effects of carbonic anhydrase inhibitors? X3
Metabolic acidosis
Sedation
Bone marrow suppression
Frusemide is?
Loop diuretic
Loop diuretics work at what part of the loop of Henle?
Thick ascending region
Loop diuretics work on what transporter?
Na+/Cl-/K+ transporter
Three indications for usage of loop diuretics?
Hypertension
Heart failure
Volume overload from CKD
Four side effects of loop diuretics?
Hypokalaemia
Dehydration and acute renal failure
Kidney stones
Deafness
Bumetanide is?
Loop diuretic
Bendroflumethiazide is?
Thiazide diuretic
Thiazide diuretic works at which transporter?
Na+/Cl- channel - prevents function
Thiazide diuretic at which region of the kidney?
DCT
Most potent diuretic is?
Loop diuretic
Hydrochlorothiazide is?
Thiazide diuretic
Main usage of thiazide diuretics?
Antihypertensives
Five s/e of thiazide diuretics
Hypokalaemia Hypercalcaemia Hyponatraemia Hyperglycaemia Hypercholesterolaemia
Two groups of potassium sparing diuretics are?
Epithelial Na+ channel antagonists
Aldosterone antagonist
Amiloride is?
Potassium sparing diuretic - epithelial Na+ channel antagonist
Spironolactone is?
Potassium sparing diuretic - aldosterone antagonist
Potassium sparing diuretics work where in the kidney?
Collecting tubule
Three indications for amiloride usage?
Heart failure
Hypokalaemia
Cirrhosis
Two side effects of amiloride usage?
HypERkalaemia
Hyponatraemia
Four indications for aldosterone inhibitor usage?
Hyperaldosteronism
Heart failure
Hypokalaemia
Cirrhosis
Main s/e of aldosterone inhibitor usage
Hyperkalaemia!!!!!!!!!!!!!!
What is an osmotic diuretic?
Any osmotically active molecule that is freely filtered in the glomerulus and is not reabsorbed by the tubules
Most important osmotic diuretic?
Mannitol
Two indications for osmotic diuretic?
Cerebral oedema
Oliguric acute renal failure
Three main contraindications for diuretic usage?
Hypotensive
Dehydrated
Post surgery with poor urine output
Three s/e of osmotic diuretic usage
Pulmonary oedema
DKA
Disequilibrium syndrome
Mannitol works as a diuretic via what mechanism?
Water drag (osmotic diuretic)
Mannitol is absorbed where in the kidney?
Glomerulus
What are the three types of hormones?
Steroid
Peptide
Amine
Three regions an endocrine hormone may act?
Cell surface
Cytoplasm
Nucleus
Three effects of an endocrine hormone?
Increased hormone production
Release of stored hormone
Cell multiplication
What factor expression is required for adrenal gland development?
Steroidogenic factor 1
Five zones of the adrenal gland are?
Adrenal cortex ZG ZF ZR Adrenal medulla
Hormones produced by adrenal medulla?
Catecholamines adrenaline and noradrenaline
Hormones produced by ZG + eg
Mineralcorticoids e.g. aldosterone
Hormones produced by ZF + eg
Glucocorticoids e.g. cortisol
Hormones produced by ZR + eg
Androgens e.g. testosteone
Right hand adrenal gland shaped?
Pyramidal
Left hand adrenal gland shape?
Crescent