PubMed · 14051691
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B MEYER. 1963. [PARATHYROID FUNCTION IN PREGNANCY].. https://pubmed.ncbi.nlm.nih.gov/14051691/
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Glycohemoglobin (GHb) has a key role in the assessment of glycemic control in diabetic patients. Several studies have clearly shown that improved glycemic control is strongly associated with decreased development and/or progression of diabetic complications in both type 1 and 2 diabetes mellitus. Therefore, accurate determination of GHb concentration is an important issue for clinical laboratories. Several factors may affect and lead to erroneous results. We discuss the problems of standardization of GHb measurements for monitoring glycemic control and also consider the potential interfering factors on GHb measurements. Moreover, GHb assays may be affected by interference in different ways. The effect of interference may be more clinically relevant with poor metabolic control. Laboratory staff must be aware of all pitfalls to avoid adding more confusion to the clinical interpretation of HbA1c values and physicians should contact laboratories if discrepancies between clinical impressions and laboratory data are observed.
Complex biological samples require very high resolution separation strategies. The platform introduced here capitalises on the hyphenation of liquid chromatographic (LC) and electric potential gradient electrochromatographic multi-dimensional separation genres. First-dimension selectivity is provided by simultaneous size exclusion (SEC) and strong cation exchange (SCX) chromatography modes, while the second dimension comprises reversed phase (RP) characteristics in a dynamic (time-variant) electric field. The time-variant potential gradient with reversal of polarity is applied across the second dimension monolithic capillary throughout the duration of the solvent strength gradient elution. Hence, the platform offers comprehensive on-line sample clean-up (matrix depletion, analyte enrichment), fractionation (first dimention LC), and separation (second dimension LC) with the prospect of altering selectivity via polarity reversal dynamic electric field tuning.