Test Catalog

Test Id : MYGLU

Myoglobin, Random, Urine

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

Confirming the presence of a myopathy associated with any 1 of the following disorders

-Hereditary myoglobinuria

-Phosphorylase deficiency

-Sporadic myoglobinuria

-Exertional myoglobinuria in untrained individuals

-Crush syndrome

-Myocardial infarction

-Myoglobinuria of progressive muscle disease

-Heat injury

 

May suggest a myopathic cause for acute renal failure

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

Latex Particle-Enhanced Immunoturbidometric Assay

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

Yes

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

Myoglobin, Random, U

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

Myoglobin

Specimen Type
Describes the specimen type validated for testing

Urine

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

Supplies: Urine Myoglobin Transport Tube (T691)

Container/Tube: Plastic, 10-mL urine myoglobin transport tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a preservative-free, random urine specimen.

2. If specimen is at ambient temperature, aliquot the urine to a urine myoglobin transport tube (T691) within 1 hour of collection. Refrigerate specimen.

3. If specimen is refrigerate, aliquot the urine to a urine myoglobin transport tube (T691) within 2 hours of collection.

Additional Information: Urinary myoglobin is highly unstable unless alkalinized with sodium carbonate preservative. Even with alkalinization, myoglobin deterioration is variable and specimen dependent (approximate averages of 10% at 1 day, 20% at 3 days, and 30% at 7 days).

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

Use of any transport tube other than urine myoglobin transport tube Reject

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 MYOGLOBIN TRANSPORT TUBE

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

Confirming the presence of a myopathy associated with any 1 of the following disorders

-Hereditary myoglobinuria

-Phosphorylase deficiency

-Sporadic myoglobinuria

-Exertional myoglobinuria in untrained individuals

-Crush syndrome

-Myocardial infarction

-Myoglobinuria of progressive muscle disease

-Heat injury

 

May suggest a myopathic cause for acute renal failure

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

Myoglobin is the oxygen-binding protein of striated muscle. Injury to skeletal or cardiac muscle results in the release of myoglobin. High concentrations appear very rapidly in the urine in various conditions including some metabolic diseases.

 

Conditions associated with myoglobinuria include:

-Hereditary myoglobinuria

-Phosphorylase deficiency

-Sporadic myoglobinuria

-Exertional myoglobinuria in untrained individuals

-Crush syndrome

-Myocardial infarction

-Myoglobinuria of progressive muscle disease

-Heat injury

 

Urine myoglobin increases with muscle necrosis, but the clinical consequences are variable. Therefore, myoglobin can confirm a clinical diagnosis of myopathy, but an elevated urine excretion of myoglobin is not specific for a clinical disorder.

 

In acute renal failure, an elevated urinary myoglobin can suggest a potential cause and, consequently, may indicate appropriate treatment courses.

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 =65 mcg/L for 18-83 years of age

Reference values have not been established for patients<18 or >83 years of age.

Interpretation
Provides information to assist in interpretation of the test results

Increased excretion of urinary myoglobin is suggestive of 1 of the following disorders:

-Hereditary myoglobinuria

-Phosphorylase deficiency

-Sporadic myoglobinuria

-Exertional myoglobinuria in untrained individuals

-Crush syndrome

-Myocardial infarction

-Myoglobinuria of progressive muscle disease

-Heat injury

 

Most clinically significant elevations are elevated 2 to 10 times normal.

 

Visual pigmenturia occurs at myoglobin concentrations about 200 times normal (approximately 4000 mcg/L).

 

Renal toxicity depends on multiple factors such as renal perfusion and degree of acidity of urine.

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

An elevated level of myoglobin in urine does not identify the clinical disorder.

 

Urine collected with acid as preservative will not be valid because acid interferes with analyte integrity.

 

Urinary myoglobin deteriorates rapidly unless stabilized immediately after collection by alkalizing with sodium carbonate.

 

Urinary myoglobin does not withstand freezing even when pH is raised with sodium carbonate.

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

1. Rowland LP: Myoglobinuria. Can J Neurol Sci. 1984;11:1-13

2. Tonin P, Lewis P, Servidei S, DeMauro S: Metabolic causes of myoglobinuria. Ann Neurol. 1990;27:181-185

3. Dawley C: Myalgias and myopathies: rhabdomyolysis. FP Essent. 2016 Jan;440:28-36

4. Nance JR, Mammen AL: Diagnostic evaluation of rhabdomyolysis. Muscle Nerve. 2015 Jun;51(6):793-810. doi: 10.1002/mus.24606

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

Latex-bound antimyoglobin antibodies react with antigen in the sample to form an antigen/antibody complex that after agglutination can be determined turbidimetrically.(Package insert: Tina-quant Myoglobin Gen 2. Roche Diagnostics; V9. 2017)

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

No

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 Sunday

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.

1 to 2 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

Rochester

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 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 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.

83874

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
MYGLU Myoglobin, Random, U 2641-9
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.
MYGLU Myoglobin, Random, U 2641-9

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