Proinsulin, Plasma

Reporting Name

Proinsulin, P

National University Hospital-Singapore Note:

For NUH patients - use Epic to order (LAB3041967)
NUH service code - 37159
Mayo test code - INS

Useful For

As part of the diagnostic workup of suspected insulinoma

As part of the diagnostic workup of patients with suspected prohormone convertase 1/3 deficiency

As part of the diagnostic workup of patients with suspected proinsulin variations

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Plasma EDTA

Specimen Required

Patient Preparation:

1.Patient should fast for 8 hours before specimen collection.

2. Infants younger than 2 years should fast a maximum of 6 hours.

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube: Ice-cooled, lavender top (EDTA)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. After collection, place the whole blood on ice for at least 10 minutes, then centrifuge at refrigerated temperature.

2. Aliquot plasma into a plastic vial and send frozen.

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type	Temperature	Time	Special Container
Plasma EDTA	Frozen	30 days

Reference Values

3.6-22 pmol/L

Day(s) Performed

Tuesday, Friday

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

84206

LOINC Code Information

Test ID	Test Order Name	Order LOINC Value
PINS	Proinsulin, P	27882-0

Result ID	Test Result Name	Result LOINC Value
80908	Proinsulin, P	27882-0

Report Available

2 to 5 days

Reject Due To

Gross hemolysis	Reject
Gross lipemia	OK
Gross icterus	OK

Method Name

Electrochemiluminescent Assay