Control Of Plasma Osmolarity Flashcards
1
Q
How is the OVLT specialised for its purpose?
A
Leaky fenestrations - no blood brain barrier - allow for response to systemic circulation.
2
Q
Outline treatment for Diabetes Inspidus.
A
Desmopressin
Low Na Diet
Dieuretics - worse states
3
Q
What type of hyponatremia does SIADH cause?
A
Dilutional hyponatremia
4
Q
Give some causes of SIADH.
A
Trauma
Surgery
CNS Infections
Stroke
5
Q
Where is urea reabsorbed?
What is the reflection coefficient of urea in the kidney?
A
Medullary CD
0.68
6
Q
Why in pscyhogenic polydipsia do patients have a maximum urine osmolarity of around 500-600mosmol/Kg
A
Increased water - washes out corticomedullar gradient reducing the maximum concentrating ability of the urine.
