Glucose measured 15 hours postprandially via high-performance liquid chromatography (HPLC) in maternal serum/plasma
This test evaluates your blood sugar level 15 hours after eating, using a specific HPLC method on a sample taken from your blood (serum or plasma).
["Understanding your blood sugar response after meals helps assess how your body manages glucose over time."]
Key facts at a glance
- LOINC
- 40278-4
- Short code
- Glucose 1.5h p Lac PO SerPl-sCnc
- Synonyms
- Glucose 1.5h p Lac PO SerPl-sCnc
- Category
- glucose
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 70
- Ref high
- 100
- Critical range
- 50 N/A – 400 N/A
- Fasting
- true
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82947
- SNOMED
- 260395008
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Healthcare providers may order this test to monitor blood sugar patterns, especially in pregnant individuals, to check for conditions like gestational diabetes or metabolic health. It helps track how well your body processes glucose after meals.
What to Expect Before the Test
No special preparation is needed, but you may be asked to fast for a portion of the day before the test. Bring any medications you’re currently taking, as they could affect results. If you’re pregnant, inform your provider about any medications or supplements you take.
What the Test Measures
This test specifically measures glucose concentration in your blood 15 hours after eating. The HPLC method provides precise measurements of glucose levels, which can help identify how your body responds to food over time.
How the Test Results Are Used
Results help determine if your blood sugar stays within a healthy range after meals. Abnormal results may indicate how your body handles glucose, which can guide treatment plans for diabetes, metabolic disorders, or other conditions.
Reference range
Fasting: 70-100 mg/dLN/A
Fasting for 8-12 hours required. Water is permitted. Avoid chewing gum and smoking before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated or fluctuating glucose levels 15 hours postprandially may signal impaired glucose metabolism, potentially linked to conditions like gestational diabetes, insulin resistance, or prediabetes. This test is particularly useful in pregnancy to assess maternal metabolic health and risk for complications.
Frequently asked questions
How long does it take to get results from this test?
Can I eat or drink anything before this test?
What does a high or low glucose reading mean?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy