Test Catalog

Test Id : F2ISO

F2-Isoprostanes, Random, Urine

Useful For
Suggests clinical disorders or settings where the test may be helpful

Assessment of in vivo lipid peroxidation


Considered to be an index of systemic oxidative stress over time

Additional Tests
Lists tests that are always performed, at an additional charge, with the initial tests.

Test Id Reporting Name Available Separately Always Performed
CRETR Creatinine, Random, U No Yes

Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

When F2-isoprostanes testing is performed, urine creatinine will always be performed at an additional charge.

Method Name
A short description of the method used to perform the test

F2ISO: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

CRETR: Enzymatic Colorimetric Assay

NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test

F2-Isoprostanes, U

Lists additional common names for a test, as an aid in searching



Lipid peroxidation

8-epi Prostaglandin F2 alpha

8-iso Prostaglandin F2 alpha




Oxidative stress

PGF2 alpha


Oxidized LDL

Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

When F2-isoprostanes testing is performed, urine creatinine will always be performed at an additional charge.

Specimen Type
Describes the specimen type validated for testing


Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing

Patient Preparation: Patient should not take nonsteroidal anti-inflammatory drugs within the 72 hours or aspirin within the 2 weeks prior to specimen collection.

Supplies: Sarstedt 5 mL Aliquot Tube (T914)

Container/Tube: Plastic urine tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.


If not ordering electronically, complete, print, and send a Cardiovascular Test Request Form (T724) with the specimen.

Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory

1 mL

Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 7 days
Frozen 30 days
Ambient 7 days

Useful For
Suggests clinical disorders or settings where the test may be helpful

Assessment of in vivo lipid peroxidation


Considered to be an index of systemic oxidative stress over time

Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

When F2-isoprostanes testing is performed, urine creatinine will always be performed at an additional charge.

Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

Oxidative stress results from an imbalance of reactive oxygen species resulting in peroxidation of biomolecules. 15-F2t-isoprostane (F2ISO, also referred to as 8-iso-PGF2alpha or 8-isoprostane) is an F2-isoprostane and its measurement is considered the "gold standard: test for quantifying lipid peroxidation in vivo. F2ISO is a potent vasoconstrictor, induces vascular smooth muscle cell proliferation, and increased aspirin resistance to platelet aggregation. Elevated urinary F2ISO concentrations are associated with the presence and extent of coronary artery stenosis, peripheral artery disease, and increased risk of post-operative atrial fibrillation.


Urinary F2ISO concentrations are lowered by aerobic exercise training, smoking cessation, and fenofibrate therapy.

Reference Values
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

> or =18 years: < or =1.0 ng/mg creatinine

Reference values have not been established for patients who are younger than 18 years of age

Provides information to assist in interpretation of the test results

Elevated urinary F2-isoprostanes reflect widespread oxidative stress and systemic burden of lipid peroxidation end products. Quantitation of F2-isoprostanes in urine is highly dependent upon the methodology utilized; however, mass spectrometry methods (gas chromatography-mass spectrometry or liquid chromatography-tandem mass spectrometry) assays yield superior sensitivity and analytical specificity compared with immunoassays.


F2-isoprostanes demonstrate superior clinical sensitivity compared to other oxidative stress biomarkers but lack clinical specificity for any particular disease. Pharmacological treatment with antioxidant supplementation, hypoglycemic agents in diabetes, smoking cessation, and weight reduction have all been shown to decrease production of F2-isoprostanes.

Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

For the most accurate assessment of lipid oxidation status, individuals should not be on aspirin or other nonsteroidal anti-inflammatory drugs, have smoked, or have had acute changes in statin mono- or combination therapies.


Patients should not take nonsteroidal anti-inflammatory drugs within 72 hours or aspirin within 2 weeks prior to providing a urine specimen for analysis.

Clinical Reference
Recommendations for in-depth reading of a clinical nature

1. Strobel NA, Fassett RG, Marsh SA, Coombes JS: Oxidative stress biomarkers as predictors of cardiovascular disease. Int J Cardiol. 2011 Mar 3;147(2):191-201

2. Davies SS, Roberts, LJ: F2-isoprostanes as an indicator and risk factor for coronary heart disease. Free Radic Biol Med. 2011 Mar 1;50(5):559-566

3. Kontush A, de Faria EC, Chantepie S, Chapman MJ: A normotriglyceridemic, low HDL-cholesterol phenotype is characterized by an elevated oxidative stress and HDL particles with attenuated antioxidative activity. Atherosclerosis. 2005 Oct;182(2):277-285

4. Vassale C, Botto N, Andreassi MG, et al: Evidence for enhanced 8-isoprostane plasma levels, as an index of oxidative stress in vivo, for patients with coronary artery disease. Coron Artery Dis. 2003 May;14(3):213-218

5. Milne GL, Sanchez SC, Musiek, ES, Morrow JD: Quantification of F2-isoprostanes as a biomarker of oxidative stress. Nature Prot. 2007;2(1):221-226

6. Zhang Z: Systematic review on the association between F2-isoprostanes and cardiovascular disease. Ann Clin Biochem. 2013 Mar;50(Pt 2):108-114

7. Wu J, Marchioli R, Silletta MG, et al: Oxidative stress biomarkers and the incidence of postoperative atrial fibrillation in the Omega-3 Fatty Acids for Prevention of Postoperative Atrial Fibrillation (OPERA) Trial. J Am Heart Assoc. 2015 May;4(5):e001886

8. Vazzana N, Ganci A, Cefalu AB, et al. Enhanced lipid peroxidation and platelet activation as potential contributors to increased cardiovascular risk in the low-HDL phenotype. J Am Heart Assoc. 2013 Apr4;2(2):e000063

Method Description
Describes how the test is performed and provides a method-specific reference

15-F2t-Isoprostane is separated and quantified in urine by liquid chromatography-tandem mass spectrometry (LC-MS/MS).(Unpublished Mayo method)

PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information


Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.


Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.

2 to 9 days

Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

7 days

Performing Laboratory Location
Indicates the location of the laboratory that performs the test


Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.

  • Authorized users can sign in to Test Prices for detailed fee information.
  • Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
  • Prospective clients should contact their Regional Manager. For assistance, contact Customer Service.

Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.

CPT codes are provided by the performing laboratory.


LOINC® Information
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.

Test Id Test Order Name Order LOINC Value
F2ISO F2-Isoprostanes, U 90783-2
Result Id Test Result Name Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
88677 15-F2t-Isoprostane, U 90783-2

Test Setup Resources

Setup Files
Test setup information contains test file definition details to support order and result interfacing between Mayo Clinic Laboratories and your Laboratory Information System.

Excel | Pdf

Sample Reports
Normal and Abnormal sample reports are provided as references for report appearance.

Normal Reports | Abnormal Reports

SI Sample Reports
International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.

SI Normal Reports | SI Abnormal Reports