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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Insulin
MessageFasting or Random; Fasting preferred
Test Code
INS
Alias/See Also
LAB3001293
CPT Codes
83525
Preferred Specimen
2.0 mL serum collected in a gold serum separator tube (SST)
Patient Preparation
Patient MUST fast
Minimum Volume
0.5 mL serum
Other Acceptable Specimens
2.0 mL serum collected in an orange rapid clot serum separator tube (RCT)
Specimen Stability
Store centrifuged samples tightly stoppered at room temperature 15 - 30oC for no longer than eight hours. If the assay will not be completed within eight hours, refrigerate the samples at 2 - 8oC. If the assay will not be completed within 48 hours, or for shipment of samples, freeze serum at -20oC or colder.
Methodology
Immunoassay
Reference Range
Fasting insulin: 1.90-23.0 µIU/mL
In patients with symptoms and/or signs of hypoglycemia without diabetes mellitus, postprandial insulin of >=3.0 µIU/mL, with a glucose concentration < 55 mg/dL, C-peptide >= 0.6 ng/mL, and pro-insulin >= 5.0 pmol/L documents endogenous hyperinsulinism.
In patients with symptoms and/or signs of hypoglycemia without diabetes mellitus, postprandial insulin of >=3.0 µIU/mL, with a glucose concentration < 55 mg/dL, C-peptide >= 0.6 ng/mL, and pro-insulin >= 5.0 pmol/L documents endogenous hyperinsulinism.
Performing Laboratory
Penn Medicine Lancaster General Health
