ARUP's Laboratory Test Directory

0070256: Proinsulin/Insulin Ratio

Test Mnemonic: PRO INS
Methodology: Refer to individual components

Performed: Refer to individual components

Reported: Refer to individual components

Specimen Required:  
Collect: One 4 mL SST.  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.

Pediatric Collection/Transport: 0.5 mL serum or plasma frozen.

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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