Test Id : CSU
Chyluria Screen, Random, Urine
Useful For
Suggests clinical disorders or settings where the test may be helpful
Aiding in the diagnosis of chyluria (galacturia)
Method Name
A short description of the method used to perform the test
Enzymatic Colorimetric/Electrophoresis/Spectrophotometry (SP)
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
Aliases
Lists additional common names for a test, as an aid in searching
Chyluria Screen, Urine
Fat Embolism Syndrome
Fat, Total
Gross Fat Droplets
Lipid Analysis, Urine
Lipid Survey, Urine
Urine Fluid
Chylomicrons
Galacturia
Triglycerides, Urine
Specimen Type
Describes the specimen type validated for testing
Urine
Necessary Information
Indicate patient's age and sex.
Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Patient Preparation: Before specimen collection, the patient should not ingest foods or beverages rich in vitamin C or take vitamin C supplements.
Supplies: Urine Container, 60 mL (T313)
Container/Tube: Plastic, 60-mL urine bottle
Specimen Volume: 15 mL
Collection Instructions: Collect a first-morning, random urine collection.
Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the testing laboratory. The minimum volume is sufficient for one attempt at testing.
15 mL
Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected
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 | Frozen (preferred) | 10 days | |
| Ambient | 4 hours | ||
| Refrigerated | 10 days |
Useful For
Suggests clinical disorders or settings where the test may be helpful
Aiding in the diagnosis of chyluria (galacturia)
Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Chyluria is a medical condition in which chyle is present in the urine. Chyle is a milky substance composed of lymphatic fluid and chylomicrons formed in the small intestine during the digestion of fatty foods. Chyluria is most prevalent in tropical areas where it is caused by parasitic (Wuchereria bancrofti) infections spread by mosquitoes. Parasitic chyluria is so rare as to be nonexistent in the continental United States. Nonparasitic chyluria causes include traumatic lesions, tumors, lymphangioma, pregnancy, and granulomatous infections.
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.
No lipoproteins present
Interpretation
Provides information to assist in interpretation of the test results
This assay provides information regarding the fat content in urine fluid. Urinary cholesterol and triglyceride values are normally less than 10 mg/dL. High triglyceride levels in urine may indicate chyluria.
Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
Ascorbic acid (vitamin C) interferes with the cholesterol determination and, to a lesser degree, the triglyceride concentration. Ascorbic acid falsely decreases the cholesterol and triglyceride results.
Result can be falsely decreased in patients with elevated levels of N-acetyl-p-benzoquinone imine (NAPQI)-a metabolite of acetaminophen, N-acetylcysteine, and metamizole.
Clinical Reference
Recommendations for in-depth reading of a clinical nature
1. Diamond E, Schapira HE. Chyluria-a review of the literature. Urology. 1985;26(5):427-431
2. Mendu DR, Sternlicht H, Ramanathan LV, et al. Two cases of spontaneous remission of non-parasitic chyluria. Clin Biochem. 2017;50(15):886-888. doi:10.1016/j.clinbiochem.2017.05.002
Method Description
Describes how the test is performed and provides a method-specific reference
This test involves 2 steps, centrifugation and lipoprotein electrophoresis, to detect the visual presence of chylomicrons. The specimen also is analyzed for cholesterol and triglycerides using an enzymatic colorimetric method. The results of the cholesterol, triglycerides, and lipoprotein electrophoresis are used together to determine whether the sample is chyluria.(Unpublished Mayo information)
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.
Monday through Friday
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.
Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location
Indicates the location of the laboratory that performs the test
Fees :
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 account representative. 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 has been modified from the manufacturer's instructions. Its performance characteristics were 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.
CPT codes are provided by the performing laboratory.
82664-Electrophoretic technique, not elsewhere specified (Chylomicrons and lipoproteins)
84311-Spectrophotometry, analyte not specified (Cholesterol)
84478-Triglycerides
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 |
|---|---|---|
| CSU | Chyluria Screen, Random, U | 95808-2 |
| 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.
|
|---|---|---|
| CHOLU | Cholesterol, Random, U | 14444-4 |
| TRIGU | Triglycerides, Random, U | 14450-1 |
| CMTCS | Interpretive Comment | 95807-4 |