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Serum or Plasma Substance Concentration by Probe Method (e.g., Protein or Specific Biomarker)

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

This test measures the amount of a specific substance in your blood, often used to detect or monitor conditions affecting protein levels or other biomarkers.

Quick summary

["Helps diagnose or track conditions like kidney disease, infections, or protein-related disorders."]

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

Key facts at a glance

LOINC
79447-9
Short code
S aureus cpe Nose Ql NAA+probe
Synonyms
S aureus cpe Nose Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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 uses a specialized probe to detect and quantify a particular substance in your blood sample. This could include proteins, enzymes, or other biomarkers depending on the clinical need. The method is highly sensitive and precise, ensuring accurate results for diagnostic purposes.

Why It’s Ordered

Your healthcare provider may order this test to evaluate conditions such as protein loss (e.g., nephrotic syndrome), infections, inflammation, or other metabolic or genetic disorders. It can also help monitor treatment effectiveness or screen for hidden health issues.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in your arm. The blood is then processed to separate serum (liquid part after clotting) or plasma (liquid part before clotting). The sample is sent to a lab where the probe detects and measures the target substance.

Common Conditions Monitored

This test is often used in cases of suspected proteinuria (protein in urine), hereditary disorders (e.g., certain genetic protein deficiencies), or to assess liver or kidney function indirectly. It may also be part of routine screening for conditions like autoimmune diseases.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How long will I need to prepare for this test?
No special preparation is usually needed, but you may be asked to fast for 8–12 hours if the test involves fasting-related substances. Follow your provider’s instructions for any dietary or activity restrictions.
What are the possible risks or side effects of this test?
The most common side effect is mild bruising, redness, or soreness at the needle insertion site. Rarely, there may be a slight reaction to the blood draw, such as dizziness or fainting. Most side effects are minor and resolve quickly.
Can I still drive or operate machinery after the blood draw?
Yes, you can typically resume normal activities immediately after the blood draw, as there are no lasting effects from the procedure. However, if you experience dizziness or lightheadedness, wait until you feel stable before driving or operating machinery.
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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