Lab test
Isocyanate MDI Allergy Test
Isocyanate MDI Allergy Test is a laboratory test you can request directly. An Isocyanate MDI Allergy Test uses a blood sample to check for allergic sensitization to methylene diphenyl diisocyanate, a chemical used in many industrial and consumer products.
Lab requirements in Isocyanate MDI Allergy Test
Here is what you need before ordering and completing the Isocyanate MDI Allergy Test. Review each item and confirm the details with the collection lab.
- Physician's order
- Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
- Fasting
- Fasting is required for this test — follow the collection lab's instructions.
- Preparation
- No special preparation is usually required, but you should follow any instructions provided by the collection laboratory. This may include avoiding certain medications or fasting, depending…
- Sample & visit
- A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
- Identification
- Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
- Turnaround
- 1-3 business days
- Availability
- Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.
Before you go
- Order your test before visiting a lab, then use the requisition form in your account.
- Print the requisition form, or fax it to the lab directly from your account.
- No scheduling is needed — visit the collection lab during its normal business hours.
- A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
- Bring a government-issued photo ID in case the lab requests it.
- Results are posted to your secure account within 1–3 business days.
Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.
What this test is
This test measures specific IgE antibodies in the blood that may indicate an allergic response to isocyanate MDI. It is typically used to help evaluate whether symptoms are related to exposure to this chemical. The test does not diagnose a condition on its own and must be interpreted by a clinician.
What it measures
- Specific IgE to Isocyanate MDI — Reflects the level of allergic antibodies directed against methylene diphenyl diisocyanate.
- Total IgE (sometimes included) — May provide a general measure of allergic tendency, though not specific to MDI.
What the test involves
A healthcare professional collects a small sample of blood from a vein in your arm using a standard blood draw. The sample is then sent to a laboratory for analysis.
Why it is often ordered
A clinician may order this test when a person has symptoms such as wheezing, skin reactions, or nasal congestion that could be linked to isocyanate exposure at work or home. It is also used to help assess sensitization in individuals who handle products containing MDI.
Preparation
No special preparation is usually required, but you should follow any instructions provided by the collection laboratory. This may include avoiding certain medications or fasting, depending on the lab's protocol.
How results are reported
Results are reported as a numerical value or a qualitative positive or negative finding, depending on the laboratory. Reference ranges vary by laboratory, so your clinician will interpret your result in the context of your symptoms and exposure history.
Before you go
- Whether any medications should be avoided before the blood draw.
- If fasting is required for this specific test.
- How and when results will be shared with you and your clinician.
FAQ
Frequently asked questions
What does a positive result mean?
A positive result suggests that your immune system has produced IgE antibodies to isocyanate MDI, which may indicate sensitization. However, it does not necessarily mean you will have allergic symptoms, and a clinician will consider your exposure history and other findings.
How long does it take to get results?
Results are typically available within one to three business days after the sample reaches the laboratory. The exact turnaround time can vary depending on the lab's workload and location.
Do I need to fast before this test?
Fasting is usually not required for an allergy blood test. However, always follow the specific instructions given by the collection laboratory, as they may have different requirements.
Can this test be done at home?
This test requires a blood draw, so it must be performed by a trained healthcare professional at a collection site. Home collection may be possible in some areas, but you should confirm with the laboratory.
Related
Related tests
Locations
Order Isocyanate MDI Allergy Test by state
Choose a state for local context.