Proinsulin tests will not be performed without prior chemical pathologist approval. The glucose result on the same specimen needs to be provided with the test request.
Proinsulin is the precursor molecule to insulin and C-peptide. Proinsulin levels may be elevated in insulinoma, although proinsulin measurement rarely provides useful clinical information above that provided by a paired insulin and C-peptide result, taken during a period of confirmed biochemical hypoglycaemia.
Specialist Biochemistry
SENB
Gross haemolysis reject, gross lipemia OK, gross icterus OK
Frozen 30 days
6 weeks