Introduction
Reagent Storage, Stability & Handling
AutoPure HDL C is ready to use, two liquid reagent system
Shelf life
Stable till the expiry date indicated on the label, when stored at 2 -8 C.
On - Board Reagent Stability
R1: 60 days at 2 - 8 C after opening
R2 : 60 days at 2 - 8 C after opening .
Protect the reagent from light and contamination.
Do not freeze the reagent.
Components & Concentration of Working Solution
Serum or plasma should not remain at 15 - 30 C longer than 14 hours. If assay is not completed within 14 hours, serum or plasma may be stored at 2 - 8 C upto 1 week. If the specimens need to be stored for more than a week, they may be preserved at less than -70C upto 3 months.
Calculations
Fully automated system automatically calculates the HDL C concentration of each sample.
Results in mmo1/1= Results in mg/di x 0.0259
Application Sheet
Refer to the application sheet for details. For additional system applications, contact our local Accurex representative.
Calibration
For calibration, it is recommended to use HDL-C calibrator from Accurex. Other commercially available HDL-C calibrators have not been tested with this assay and cannot be supported by Accurex Biomedical Pvt. Ltd. Refer to the HDL-C calibrator kit package insert for a description of assignment procedures and instructions. The value of HDL-C calibrator was assigned by procedures traceable to National Reference System for Cholesterol (NRS/CHOL). Calibration material have concentrations around medical decision level.
Calibration frequency
Re calibration is recommended
Quality Control
Each batch of AutoPure HD C is assayed with multiple quality control sera prior to release.
To ensure adequate quality control, it is recommended that the laboratory should use a normal and abnormal commercial reference control serum. It should be realized that the use of quality control material checks both the reagent and instrument functions together.
If the control values fall outside the specified limits, each of the below criteria should be cross - checked and corrected:
Performance Characteristics
Linearity
With AutoPure HDL-C, the assay is linear upto 150 mg/dl (3.89 mmo1/1). Determine samples with higher concentrations via the rerun function. On instruments without rerun function, manually dilute samples with higher concentrations using 0.9% NaCI or distilled/deionized water (e.g. 1 + 4). Multiply the result by the appropriate dilution factor (e.g. 5).
Interference
There is no significant interference in samples containing upto 60 mg/dl of conjugated and unconjugated bilirubin, 1800 mg/dl of triglycerides, 1000 mg/dl of haemoglobin, 100 mg/dl of ascorbic acid & 5000 mg/dl of gamma globulins.
Precision
Reproducibility was determined using three levels of pooled human sera as shown below:
| Within run | Between run | ||||
Serum pool | Mean mg/dL | SD mg/dL | CV | Mean mg/dL | SD mg/dL | CV |
Low ( <40 mg/dl) | 32.9 | 0.3 | 0.8 | 32.8 | 0.4 | 1.3 |
Mid (40-59 mg/dl) | 50.6 | 0.2 | 0.5 | 50 | 0.7 | 1.5 |
High (>60 mg/dl) | 101.4 | 0.7 | 0.7 | 100.1 | 1.1 | 1.1 |
Co - Relation Studies
A comparison of HDL-C determination using AutoPure HDL-C and the Designated Comparison Method (DCM) gave the following co-relation (mg/dl):
Linear Regression
No of samples measured : 52
References
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