Skip to content

Cystic Fibrosis Carrier Screening via Genetic Testing (Plasma/Donor Sample)

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

This test checks if you carry a mutated gene linked to cystic fibrosis (CF), a genetic condition affecting lungs and digestive systems. It uses blood plasma from either you or a donor sample.

Quick summary

["Determines if you may pass CF risk to future children through your genes."]

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

Key facts at a glance

LOINC
92569-3
Short code
CT Guided Pl space-Bl Drain+CT place
Synonyms
CT Guided Pl space-Bl Drain+CT place
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
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 Might Be Ordered

Your doctor may recommend this test if you have a family history of cystic fibrosis, are considering pregnancy, or are from a region with higher CF prevalence. It helps assess genetic risk before conception.

What to Expect During the Test

A small blood sample is drawn from your arm. The plasma portion is tested for specific genetic markers associated with CF. Results are based on genetic analysis rather than biochemical measurements.

Understanding Your Results

Results are typically reported as 'carrier' (if you have one mutated gene) or 'non-carrier' (if neither gene is mutated). If you’re a carrier, you may pass CF to your children.

Preparation and Considerations

No special preparation is needed. If using a donor sample, ensure it is properly labeled and stored. Results may take several weeks to process.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Identifying carriers allows couples to make informed decisions about family planning. Early knowledge can lead to genetic counseling, prenatal testing, or assisted reproductive technologies to reduce risk. CF carriers may also benefit from monitoring for related health conditions.

Short name

CF Carrier Screening (Plasma)

Frequently asked questions

What does a positive result mean?
A positive result means you carry one mutated CF gene. You have a 25% chance of having a child with CF if you partner with another carrier. If you’re not a carrier, you do not carry this genetic risk.
How accurate is this test?
This test is highly accurate for detecting known CF mutations. However, some mutations may not be covered by this specific test. Genetic counseling can help interpret results and discuss limitations.
Can I get this test if I’m pregnant?
No, this test is typically done before pregnancy. If you’re pregnant and have a family history of CF, your doctor may recommend prenatal genetic testing instead.
  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