Endocrinology Flashcards
SG water
1.000
SG concentrated urine
1.025
Normal serum osmolality
280-300
Water deprivation test
Central DI
What happens to urine osmolality
Doubles
Hypercalcaemia and urine output
Can cause polyuria
In complete DI
Urine osmolality compared to serum
Urine osmolality not higher than serum
CSW
Serum sodium
Urine output
Hyponatraemia (salt wasting)
Polyuria
SIADH
Volume status
Serum sodium
Urine output
Euvolaemic
Hyponatraemia
Oliguria
DI
Volume status
Serum sodium
Urine output
Often mild/mod dehydration
Hypernatraemia
Polyuria
In congenital hypothyroidism, start thyroxine if TSH >
20 (even if T4 normal)
Dawn phenomenon
Growth Hormone
Somogyi phemenon
Evening hypoglycaemia response
Most common MODY
MODY3 - HNF1A mutation
Normal height velocity
25th-75th centriole
How frequently do bone age
1 yrly intervals