ARUP's Laboratory Test Directory

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
0070063Insulin, Fasting 3-19 µIU/mL
0070112Proinsulin 0-1 year: Not established
2 years and older: 2.1-26.8 pmol/L
 Proinsulin/Insulin Ratio CalculationProinsulin/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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