Proinsulin/Insulin Ratio : ARUP Lab Tests

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Proinsulin/Insulin Ratio : 0070256

Mnemonic: PRO INS

Methodology:	Refer to individual components
Performed:	Refer to individual components
Reported:	Refer to individual components
Specimen Required:	Collect: One 4 mL serum separator tube. Also acceptable: lavender (EDTA) or pink (K₂EDTA). Transport: 1 mL serum or plasma, frozen. (Min: 0.8 mL) Submit specimen in an ARUP Standard Transport Tube. Remarks: Patient must fast 12-15 hours before collection. Separate serum from cells ASAP and freeze. Avoid repeated freeze/thaw cycles. Unacceptable Conditions: Heparinized plasma. Stability: After separation from cells: Ambient: Unacceptable; Refrigerated: 1 week; Frozen: 3 months

Reference Interval:

Test Number	Components	Reference Interval
0070063	Insulin, Fasting	3-19 µIU/mL
0070112	Proinsulin	0-1 year: Not established 2 years and older: 2.1-26.8 pmol/L
	Proinsulin/Insulin Ratio Calculation	Proinsulin/Insulin Ratio as %: Normal fasting adults: 3.4-21 Normal fasting children: 6.4-16

Interpretive Data:

To convert to pmol/L, multiply by 6.0.

CPT Code(s):

84206 Proinsulin; 83525 Insulin

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