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Cardiac troponin I (CTnI) with guided percutaneous coronary drainage (PCD) and catheter replacement monitoring

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

This test measures a protein released when heart muscle is damaged, often checked after procedures like coronary angiography or catheter placement to monitor for complications.

Quick summary

["This test helps track heart injury risk during or after certain medical interventions."]

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

Key facts at a glance

LOINC
90311-2
Short code
CT Guided PC drain cath replace
Synonyms
CT Guided PC drain cath replace
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 Is Done

Doctors may order this test if you’ve recently had a procedure involving the heart’s blood vessels, such as a coronary angiography, angioplasty, or catheter placement. It helps assess whether your heart tissue was damaged during or after the procedure.

What to Expect Before the Test

No special preparation is needed unless instructed by your healthcare provider. You may be asked to fast for a short time before the blood draw, but this depends on the full procedure timeline.

What the Test Involves

A small blood sample is taken from a vein, usually in your arm. The test checks for elevated troponin levels, which can indicate heart muscle injury.

What the Results Mean

High troponin levels after a procedure may signal heart damage, requiring further evaluation. Low or normal levels suggest no significant injury. Your doctor will interpret results in the context of your symptoms and procedure details.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cardiac Troponin I (CTnI) Post-Procedure

Frequently asked questions

What does a positive result mean?
A positive result (elevated troponin) may indicate heart muscle damage from the procedure. Your doctor will review your symptoms, test results, and medical history to determine next steps.
How soon will I get my results?
Results are typically available within 24–48 hours, depending on lab processing. Your doctor will contact you with findings and next steps.
Can I eat or drink before this test?
Check with your doctor or lab technician about fasting requirements, as they may vary based on the full procedure schedule.
  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