Home
HelpTest Code CK RF CKMB CK, REFLEX CK-MB
Additional Codes
LAB13352
Collection Method
Lt Green / Plasma Separator / Lithium Heparin
Minimum Volume
0.5ml
Container
Venous collection
Acceptable Specimens
Serum:
- Gold Top SST
- Red Top
Plasma:
- Light Geen Top (lithium heparin)
Reference or Target Ranges
CK Reference Range
| Age | Female |
| <21 days | 0-600 U/L |
| 3 weeks to 3 months | 0-440 U/L |
| 3 months up to 18 years | 26-192 U/L |
| 18 years and up | 34-145 U/L |
| Age | Male |
| <21 days | 0-600 U/L |
| 3 weeks to 3 months | 0-440 U/L |
| 3 months up to 18 years | 39-308 U/L |
| 18 years and up | 46-171 U/L |
CKMB Reference Range
| Age | Male | Female |
| all ages | 0-7.7 ng/mL | 0-4.3 ng/mL |
Creatine Kinase Index
CK-MB index calculation = (CK-MB) x100 / (total CK activity)
CK-MB index reference range ≤3.0%
Reportable Units
| CK | U/L |
| CKMB | ng/mL |
| CK-MB INDEX | % |
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | CK: 100 mg/dL CKMB: 1000 mg/dL |
| Icterus Threshold | CK: 60 mg/dL CKMB: 34 mg/dL |
| Lipemia Threshold | CK: 1000 mg/dL CKMB: 1500 mg/dL |
| Other | QNS, contaminated, improperly labled, improper specimen type |
Specimen Stability
| Ambient | 4 hours |
| Refrigerated (4°C to 8°C) | 8 hours |
| Frozen(-40°C to 0°C) | 4 weeks |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time |
Stat: 1 hour Routine: 4 hours |
| Stat Availabilty | Yes |
| Performing Bench | CPH Chemistry |
| Methodology/Method Description | Roche Cobas |
CPT Codes
82550
Last review/edit date
2025
Reflex Testing
Reflex Criteria- Reflex from CK to CK-MB
Female
|
Age Range |
Low |
High |
| <21 days | n/a | >600 |
| 3 weeks to 3 months | n/a | >440 |
|
3 months up to 18 years |
<26 |
>192 |
|
18 years and up |
<34 |
>145 |
Male
|
Age Range |
Low |
High |
| <21 days | n/a | >600 |
| 3 weeks to 3 months | n/a | >440 |
|
3 months up to 18 years |
<39 |
>308 |
|
18 years and up |
<46 |
>171 |