KR117 Hemoglobin A1c For Short Program
Reagent kit for the hplc determination of hemoglobin a1c in whole blood.
contents for 1000 analyses:
Hemoglobin (hb)is one of the many proteins subjected to non-enzymatıc glycosylation.97% of adult hemoglobin is hba,25%hba2,0.5%hbf.hba is composed of 2a and 2β chains.hba0 is non-glycolise hemoglobin fraction.hba1c is a major fraction that accur 80% of hba1.glycosylated hemoglobins are the result of simple chemical reactions between hemoglobin and sugars.the reaction proceeds in twostages;enzymes are not involved.first stage,glucose combines with the amino group of the valine residue at the n-terminus of 18 globin chains to form an aldimine compound(schiff base).this reaction is reversible ,and dissociation to native hemoglobin and glucose occurs readily.second stage,internal rearrangement of the aldimine intermediate by the amadori reaction yields a stable ketoamine derivative.
Life span of red blood cells are about 2-3 months,hba1c shows mean glucose level of exposure for 2-3 months.glycosylated hemoglobin concentrations have been show to be related to:physicians’ratings of diabetic control,fasting blood glucose concentrations,postrandial blood glucose concentrations,and home monitoring of blood glucose concentrations.the unresolved labile a1c and inadequate storage conditions may have a significant effect on ghb results.labile a1c may accoumt for a2-3% increase in total a1c in normal subjects and up to 10% increase in diabetic individuals.
EQUIPMENT AND INSTRUMENTAL PARAMETERS
the analysis of hemoglobin variants requires a hplc including system with hplc pump,autosampler,autoinjector and uv detector.the use of a solvent degasser prevents air bubbles and ensure a stable baseline.
Sampler : injection volume 10 µl,analytical run tıme 2 min.
Hplc pump : flow rate 2 ml/min is recommended
Column temperature : 28°c
Uv detector : 415 nm
Collection And Storage Of Patient Specimens
The sample material is whole blood. All analytes will be stable for 7 days when stored tightlycapped at 2-8°c.
Preparation Of Calibrator
The calibrator is injected directly,without dilution or pre-incubation.
Reconstitution Of The Controls
The controls level I and level II are prepared with the other sample preparation. The lyophilised controls are dissolved 0.5 ml distilled water to each control bottle and replace capsthe controls should be allowed to stand at room temperature for 5-10 minutes.before sampling, gently swirl the vial sveral times to ensure homogeneity.
Storage life of the reconstitute controls:
This product will be stabled until the expiation date when stored unopened at 2-8°c. Once the control is reconstitued, all analytes will be stable for 7 dyas when stored tightly capped at 2-8°c.it is recommended to use Kreon Medical control and calibrators.
Storage life of the prepared samples:
Samples prepared as above can be stored at ambient temperature for about 24 hours, at+2 to +8 °c up to 7 days, frozen below -18°c up to 3 months.