Test ID: HMAX
Histochemistry of Sent-In Muscle Specimen Maximum
Secondary ID 
A test code used for billing and in test definitions created prior to November 2011
NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.
Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.
Electron microscopic studies are not performed on sent-in muscle biopsy specimens.
Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test
Method Name A short description of the method used to perform the test
Includes a battery of enzyme histochemical stains. Immunostaining and other tests can be performed as indicated and will be charged separately.
Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name
Aliases Lists additional common names for a test, as an aid in searching
Muscle Tissue
Skeletal Muscle Tissue
Specimen Type Describes the specimen type needed for testing
Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.
Send specimen Monday, Tuesday, or Wednesday only.
Specimen Type: Muscle biopsy specimen
Collection Instructions: Prepare and transport specimen per instructions in Muscle Biopsy Specimen Preparation Sheet in Special Instructions.
Additional Information:
1. Contact Dr. Andrew Engel (Director of the Muscle Laboratory at Mayo Clinic) for special problems to maximize benefit of the muscle biopsy.
2. Muscle Biopsy Shipping Kits (Supply T541) are available.
Forms:
1. Muscle Histochemistry Patient Information Sheet (Supply T361) in Special Instructions.
2. If not ordering electronically, submit a Pathology/Cytology Request Form (Supply T246) with the specimen.
Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.
Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected
| Hemolysis | NA |
| Lipemia | NA |
| Icterus | NA |
| Other | NA |
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.
| Specimen Type | Temperature | Time |
|---|---|---|
| Tissue | Frozen (preferred) | |
| Ambient | ||
| Refrigerated | ||
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.
An interpretive report will be provided.
Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.
Monday through Friday; Continuously
Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
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 The location of the laboratory that performs the test
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's instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR), Investigation Use Only (IUO) product, or a Research Use Only (RUO) product.
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 Medical Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
88305-Surgical pathology examination
88314-x 3-ATPase acid alkaline stain
88314-Congo red stain
88314-Hematoxylin-and-eosin water soluble stain
88314-Oil red O stain
88314-Periodic acid-schiff stain
88314-TB ATPase alkaline stain
88314-Trichrome water soluble stain
88319-Acetate non-specific esterase stain
88319-Acid phosphatase stain
88319-Alpha-naphthyl stain
88319-Cytochrome oxidase stain
88319-NADH dehydrogenase stain
88319-Phosphorylase stain
88319-Succinic dehydrogenase stain
LOINC® Code Information Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the result codes returned for this test or profile.
| Result ID | Reporting Name | LOINC Code |
|---|---|---|
| HMAX | Histochemistry Muscle Spec Maximum | In Process |
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