South Bend Medical Foundation - Your Community Laboratory

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Test Name:
Glucose, Plasma

• SBMF No:
  29129
• Performance Lab Name:
  Automated Lab
• Test Mnemonic:
  GLUR-
• ABN:
  May be required – Medical Necessity
• CPT Code:
  82947
• LOINC Code:
  2345-7
• Also Known As:
  Blood Glucose
  Sugar, Blood
  Fasting Blood Sugar
  FBS
  Fasting Plasma Glucose
  FPG
• Also See:
  29056 – Glucose Tolerance, Modified (ADA), Non-Gestational
  29004 – Glucose Challenge, Gestational
  29057 – Glucose Tolerance, Gestational
• Spec Type:
  Plasma
• Spec Container:
  Light green top (PST) tube
• Alt Spec Type:
  Plasma
• Alt Spec Container:
  Gray top (fluoride/oxalate) tube
  Note: Although not preferred, serum samples are acceptable, but must be removed from cells within 60 minutes of collection and refrigerated
• Pref Vol:
  1.0 mL
• Min Vol:
  0.3 mL
• Fasting:
  Yes
• Patient Prep:
  Fasting at least eight (8) hours; 12-hour fast is preferred; fasting should not to exceed 14 hours
  Non-fasting sample acceptable per physician order
• Spec Collect:
  Routine venipuncture
• Spec Process:
  

  PST or gray top tubes:

  – Promptly centrifuge 15 minutes and refrigerate

  Gold top or red top tubes:

  – Clot 30 minutes
  – Promptly centrifuge 15 minutes
  – Within 60 minutes of collection, transfer serum to separate plastic tube and refrigerate

• Spec Store Transport:
  Refrigerated
• Spec Stability:
  1 week refrigerated (2-8°C)
• Spec Reject:
  Plasma or serum in contact with RBC more than 1 hour
• Methodology:
  Enzymatic
• Use:
  Used in the diagnosis and treatment of carbohydrate metabolism disorders including: diabetes mellitus, neonatal hypoglycemia, idiopathic hypoglycemia, and pancreatic islet cell carcinoma
• Clinical Significance:
  

  Glucose measurements are used in the diagnosis and treatment of carbohydrate metabolism disorders including diabetes mellitus, idiopathic hypoglycemia, and pancreatic islet cell carcinoma. Based on recommendations made in 2002 by the Expert Committee of the American Diabetes Association (ADA) and by the World Health Organization (WHO), South Bend Medical Foundation has adjusted testing procedures and interpretative data for diabetes testing as summarized below.

  Recommendations for Diagnosing Type 1 and Type 2 Diabetes:

  Fasting Plasma Glucose (FPG):
  – FPG less than 110 mg/dL = normal fasting plasma glucose level
  – FPG equal to or greater than 110 and less than 126 mg/dL = impaired fasting plasma glucose level
  – FPG equal to or greater than 126 mg/dL = provisional diagnosis of diabetes; confirm on subsequent day.
  Note: When the FPG is in the impaired fasting glucose range (110-126 mg/dL), a modified oral glucose tolerance test is recommended, consisting of a fasting and a 2-hour post-glucose plasma sample.

• Reference Range:
  64-105 mg/dL
• Critical Low Value:
  Adult: < 56 mg/dL
  Newborn: < 30 mg/dL
• Critical High Value:
  Adult: > 400 mg/dL
  Newborn: > 200 mg/dL
• Day Run:
  Sun-Sat (daily)
• Time Run:
  As received
• Time Reported:
  4 hours
• Test Type:
  CHEMISTRY