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Unspecified analyte measurement via catheterized blood sample (qualitative or semi-quantitative probe-based test)

Published: August 9, 2026Updated: August 16, 2026

This test involves analyzing a sample drawn directly from your blood vessel during a catheter procedure to detect specific substances in your bloodstream.

Quick summary

["This test helps identify substances that may indicate underlying health conditions or monitor treatment responses during a medical procedure."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
87167-3
Short code
Guided Unsp region Transcath Bx
Synonyms
Guided Unsp region Transcath Bx
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
imaging-modality
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

What This Test Measures

The test measures the presence or concentration of one or more substances in your blood, obtained through a catheter. The method used is likely a probe-based qualitative or semi-quantitative technique, which may include fluorescence or chemiluminescence detection. This approach is often used to quickly assess substances like proteins, enzymes, or other biomarkers that could signal infection, inflammation, or other conditions.

Why It’s Done During a Catheter Procedure

Catheter-guided tests like this are typically performed during procedures such as angiography, cardiac catheterization, or other interventional radiology or cardiology exams. The catheter allows for direct blood sampling from a specific vessel, providing real-time or near-real-time data that may guide treatment decisions.

Common Uses and Clinical Contexts

This test may be used to diagnose or monitor conditions such as infections, metabolic disorders, or to assess drug levels in the bloodstream. It can also help evaluate the effectiveness of treatments like chemotherapy or other targeted therapies by detecting specific biomarkers.

Potential Risks and Considerations

While generally safe, catheter procedures carry minor risks such as infection, bleeding, or allergic reactions to contrast agents if applicable. Ensure your healthcare provider discusses any known allergies or conditions that could affect the test results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Results from this test can provide critical information for diagnosing conditions like sepsis, acute kidney injury, or detecting drug toxicity. Early detection of abnormal substances can lead to timely interventions, improving patient outcomes. However, results should always be interpreted by a healthcare professional in the context of your overall health and medical history.

Frequently asked questions

What does this test measure exactly?
This test measures specific substances in your blood, but the exact analyte(s) are not specified in the code. Common substances measured in such tests include proteins, enzymes, or other biomarkers that may indicate infection, inflammation, or other health concerns. The test is qualitative or semi-quantitative and may use a probe-based method to detect these substances during a catheter procedure.
Why would my doctor order this test during a catheter procedure?
Your doctor may order this test to obtain precise and immediate blood sample results during a catheter procedure. This can help guide real-time medical decisions, such as adjusting treatment, diagnosing conditions, or monitoring the effectiveness of therapies like chemotherapy or drug infusions.
Are there any risks associated with this test?
Yes, while catheter procedures are generally safe, there are minor risks such as infection, bleeding, or allergic reactions. Your healthcare provider will discuss these risks with you before the procedure and take steps to minimize them, such as using sterile techniques and monitoring you closely during the process.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

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