ResourceClinical Diagnostics
Minimizing the number of false positives in dexamethasone suppression testing for the diagnosis of Cushing’s syndrome
5 Jul 2023In this application note, Tecan presents a method for diagnosing Cushing's syndrome efficiently and accurately. The approach involves simultaneous the measurement of cortisol and dexamethasone levels using LC-MS/MS, which reduces false positives in dexamethasone suppression test (DSTs). The described LC-MS/MS method enables the tracking of multiple analytes, including cortisol, cortisone, and dexamethasone, in serum or plasma. Implementing this analytical approach offers clinical laboratories a straightforward means of performing DSTs, and the availability of a commercially available kit ensures reliable and reproducible results.
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Cellular PathologyCellular Pathology deals with the microscopic analysis of tissue samples and cells. Sample preparation and processing includes fixation, staining, sectioning and slide mounting, using equipment such microtomes and cryostats. In choosing immunohistochemistry and immunocytochemistry kits, consider chromogens, staining method, antibodies, microscopes and imaging.Point-of-CarePoint-of-Care Testing (POCT) or Near Patient Testing (NPT) products are available for urine, blood and other clinical chemistry analyses. POCT includes: blood glucose testing, blood gas and electrolytes analysis, rapid coagulation testing (PT / INR), rapid cardiac markers diagnostics, drugs of abuse screening, urine strips testing, pregnancy testing, fecal occult blood analysis, food pathogens screening, hemoglobin diagnostics, infectious disease testing and cholesterol screening.Clinical ChemistryBiochemistry (or clinical chemistry) involves the analysis of bodily fluids using chemical tests. Techniques used include HPLC, chromatography, spectroscopy, mass spectrometry, immunochemical, electrophoresis, turbidometric / spectrophotometric assay, MRI and ISE analysis. Tests are often carried out on plasma or serum but urine (urinalysis) and fecal specimens are also processed.Clinical MicrobiologyMicrobiology is the study of microorganisms including protists, prokaryotes, fungi, and, often, viruses. Microorganisms are a useful research tool as genetic vectors and, in immunology, for antibiotic susceptibility testing, cellular biology and genetics. Microorganisms commonly grow readily in incubators with microbial culture media; this can contain chromogenic supplements to differentiate between cell lines. Estimate your culture’s density of microorganisms with colony counters, or screen and select colonies for desirable clones with automated colony pickers. Additionally, equipment is available to monitor environments for the presence of microbes and identify with microbial identification instruments. Find the best microbiology products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.LC-MSLC-MS (liquid chromatography-mass spectrometry) systems and equipment are used for separation and quantitative analysis of complex mixtures, combining liquid chromatography and mass spectrometry. Quantify proteins, contaminants, pesticides or screen for drug metabolites with a high level of sensitivity. LC-MS systems and equipment include reverse phase, normal phase and specialized columns integrated with various MS detectors such as time-of-flight (TOF), quadrupole, orbitrap or ion trap mass analyzers. LC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzer give greater sensitivity and resolving power to your analysis. Find the best LC-MS equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.ImmunoassayImmunoassays are laboratory tests that utilize antibody-antigen interactions to detect specific substances. They are widely used in diagnostics for detecting diseases, drug testing, and environmental monitoring. These assays offer rapid, sensitive, and precise detection of biomarkers, making them invaluable in clinical and research labs. Browse our peer-reviewed product directory to compare immunoassay systems, read user reviews, and get pricing directly from manufacturers.DiabetesDiabetes is a metabolic disorder characterized by high blood sugar levels, either due to insufficient insulin production or resistance to its effects. Ongoing diabetes innovation focuses on developing better diagnostic tools, treatments, and preventive measures. Browse our peer-reviewed product directory to find the best diabetes diagnostic tools, compare products, check reviews, and get pricing directly from manufacturers.Clinical ChemistryClinical chemistry involves the analysis of bodily fluids, like blood and urine, to diagnose and monitor diseases. Tests in clinical chemistry provide critical information for patient care and treatment decisions. Explore clinical chemistry tools in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Molecular DiagnosticsMolecular diagnostics use an individual’s genetic code and gene expression to diagnose and monitor diseases. The technique is used increasingly in the field of infectious diseases and oncology, as well as areas such as coagulation, HLA typing and pharmacogenomics. Molecular diagnostics plays a pivotal role in personalized medicine.