CKELR - Specimen: Creatine Kinase Isoenzyme Reflex, Serum

Test Catalog

Test Name

Test ID: CKELR    
Creatine Kinase Isoenzyme Reflex, Serum

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

Testing begins with total creatine kinase analysis (CK). If the total CK activity is <100 U/L testing is complete. CK isoenzyme electrophoresis (CKE) testing will not be performed. If the total CK activity is > or =100 U/L, CK isoenzyme electrophoresis (CKE) will be performed at an additional charge.

Specimen Type Describes the specimen type validated 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.


Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 2 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

Additional Information:

1. Patient's age and sex are required.

2. CK isoenzyme electrophoresis determinations are done if the CK, total is > or =100 U/L.

3. Include date and time of draw.

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

0.75 mL

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


Mild OK; Gross reject


Mild OK; Gross OK


Mild OK; Gross OK



Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperatures are also included.

Specimen TypeTemperatureTime
SerumRefrigerated (preferred)7 days
 Frozen 28 days