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Serum/plasma concentration of lanthanum (qualitative probe test for phosphate)

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

This test checks if lanthanum can bind to phosphate in your blood, helping assess kidney function or metabolic issues.

Quick summary

["A simple blood test to detect abnormal phosphate levels, often linked to kidney problems or metabolic disorders."]

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

Key facts at a glance

LOINC
73318-8
Short code
Lansoprazole ind plt IgM SerPl Ql FC
Synonyms
Lansoprazole ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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 like fatigue, muscle weakness, or signs of kidney disease. It can also be part of routine monitoring for certain conditions or after exposure to substances that affect phosphate levels.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or hand to draw blood. The test is quick and usually painless. If you’re on a blood thinner, let your provider know before the test.

What the Results Mean

This test is qualitative, meaning it only tells whether phosphate is present or not in a detectable amount. Results don’t provide exact numbers, but they can help guide further testing or treatment if needed.

Common Conditions Monitored

This test may be used to monitor conditions like kidney disease, metabolic bone disease, or hyperphosphatemia (high phosphate levels). It can also be part of investigations for rare metabolic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Since this is a qualitative probe test, positive results suggest abnormal phosphate levels that may warrant further diagnostic testing, such as blood chemistry panels or urine tests. Negative results don’t rule out phosphate issues entirely, so your provider may recommend additional tests or follow-up if symptoms persist.

Short name

Phosphate qualitative screening

Frequently asked questions

What does a positive result mean?
A positive result indicates that phosphate is present in your blood in a way that lanthanum can detect, which may suggest abnormal phosphate metabolism. This could be due to kidney problems, certain medications, or metabolic disorders.
Will I need more tests if this test is positive?
Yes, further testing is likely needed. Your provider may order additional blood or urine tests to measure phosphate levels more precisely or check for underlying causes like kidney function or metabolic disorders.
Can diet or medications affect this test?
Dietary phosphate intake or certain medications (like proton pump inhibitors) can influence phosphate levels. Your provider may ask you to avoid specific foods or medications before or after the test to get accurate results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

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