Interstitial Fluid Glucose Level (Reported Over a Specified Period)
This test measures the glucose (sugar) level in the fluid surrounding your cells, tracked over a defined period. It helps assess how your body manages blood sugar levels in real-time.
["Understanding how your body regulates sugar helps identify risks for diabetes or other metabolic conditions."]
Key facts at a glance
- LOINC
- 97507-8
- Short code
- Ave Glucose Interstitial fld RptPeriod
- Synonyms
- Ave Glucose Interstitial fld RptPeriod
- 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
- Method
- calculated
- 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
Your healthcare provider may order this test if you have symptoms of high or low blood sugar, such as frequent urination, excessive thirst, fatigue, or unexplained weight changes. It may also be used in monitoring conditions like diabetes or during pregnancy to check glucose trends in interstitial fluid, which reflects metabolic activity more closely than blood glucose alone.
What to Expect Before the Test
No special preparation is needed for this test. A small sample of interstitial fluid is typically collected using a microdialysis or continuous glucose monitoring device. You may experience a slight pinch or discomfort, similar to a blood draw, but it is usually brief.
What the Test Results Mean
Interstitial fluid glucose levels can fluctuate throughout the day, often rising or falling slightly faster than blood glucose. Results may be reported as a trend over time rather than a single value, helping to identify patterns in your glucose metabolism.
Common Causes of Abnormal Results
Elevated levels may indicate poor glucose control, stress, infection, or certain medications. Low levels could suggest hypoglycemia, excessive insulin use, or other metabolic disturbances. Your provider will interpret results in the context of your overall health and symptoms.
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.
This test provides insights into how glucose is managed in the body’s immediate environment, which can be critical for diagnosing or managing diabetes, metabolic syndrome, or other conditions affecting blood sugar regulation. It may also help tailor treatment plans, such as insulin adjustments or lifestyle modifications, to better match your body’s needs.
Short name
Interstitial Fluid Glucose Profile
Frequently asked questions
How often will I need this test?
Will the test affect my daily activities?
What if my results are outside the expected range?
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