Low Density Cholesterol Measured
| Label Mnemonic: | LDL |
| Epic code: | LAB102 |
| Order form: | Laboratory Requisition |
| Supply order: | Supply Order Form |
| Billing: | Billing Policies |
| CPT code: | 83721 |
Specimen(s):
Plasma
Collection Medium:
|
| Plasma Separator Tube 4.5 mL |
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection
containers.
Minimum:
3 mL whole blood from light green top tube or ONE
Microtainer®.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
< 130- mg/dL (Approved by NCEP, National Cholesterol Education
Program)
Normal - <100 mg/dL
Above Normal - 100-129 mg/dL
Borderline High - 130-159 mg/dL
High - 160-189 mg/dL
Very High - ≥190 mg/dL
Normal - <100 mg/dL
Above Normal - 100-129 mg/dL
Borderline High - 130-159 mg/dL
High - 160-189 mg/dL
Very High - ≥190 mg/dL
Comments:
Fasting for at least 8 hours prior to collection is recommended.
Non- fasting sample can be used, but they are slightly lower than
fasting results. Correlation between calculated LDL and measured LDL
is very good. Measured can be used for LDL (measured) non-fasting
samples with Triglycerides > 400 mg/dL.
Please print, complete and submit the Advance Beneficiary Notice (ABN) along with the Laboratory Requisition before shipping the specimen.
Please print, complete and submit the Advance Beneficiary Notice (ABN) along with the Laboratory Requisition before shipping the specimen.
Test Limitations:
In rare cases, elevated immunoglobulin concentrations cause falsely
elevated LDL values.
Hemolysis: No significant interference up to an H index of 1000 (approximate hemoglobin concentration: 1000 mg/dL).
Lipemia: No significant interference up to an L index of 1000 (approximate triglycerides concentration: 2000 mg/dL). Note there is poor correlation between turbidity and triglyceride concentration.
Icterus: No significant interference up to an I index of 60 (approximate conjugated and unconjugated bilirubin concentration: 60 mg/dL).
Hemolysis: No significant interference up to an H index of 1000 (approximate hemoglobin concentration: 1000 mg/dL).
Lipemia: No significant interference up to an L index of 1000 (approximate triglycerides concentration: 2000 mg/dL). Note there is poor correlation between turbidity and triglyceride concentration.
Icterus: No significant interference up to an I index of 60 (approximate conjugated and unconjugated bilirubin concentration: 60 mg/dL).
Methodology:
Enzymatic
Sample Processing:
Centrifuge at a speed and time necessary to get barrier separation
of plasma/serum and cells within 1 hour of collection. Send specimen
in original tube. Do Not transfer to another tube.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Sample Storage:
Refrigerate.
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
Transport Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal
bag.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
See also:
Cholesterol, Low-Density Lipoprotein (calculated), Plasma
Cholesterol, Low-Density Lipoprotein (calculated), Plasma
See Additional Information:
Fasting Specimen Requirements
Fasting Specimen Requirements