How do Point-of-Care Diagnostics work?
Point-of-care devices miniaturize laboratory methods into compact instruments and single-use test formats. Lateral flow immunoassays wick the sample along a membrane where labeled antibodies form visible or fluorescent lines at capture zones, and a reader quantifies line intensity. Electrochemical biosensors measure current or potential produced by enzymatic reactions on printed electrodes, as in glucose and lactate testing. Cartridge analyzers combine microfluidics with ion-selective electrodes or optical detection for blood gases and chemistry. Coagulation meters detect clot formation by impedance or light scattering changes. Compact hematology analyzers use impedance counting and colorimetric hemoglobin measurement. Built-in quality checks, lot calibration and connectivity support reliable use by non-laboratory operators.
Which Point-of-Care Diagnostics variants are available?
- Lateral Flow Test Strip Reader — A lateral flow test strip reader scans immunochromatographic strips or cassettes using reflectance or fluorescence and converts line intensity to qualitative or quantitative results.
- Handheld Cartridge-Based Blood Analyzer — A handheld cartridge-based blood analyzer measures blood gases, electrolytes, glucose, lactate, creatinine and other analytes from a few drops of whole blood using single-use cartridges.
- Point-of-Care INR Coagulation Meter — A point-of-care INR coagulation meter measures prothrombin time from a fingerstick blood drop and reports the international normalized ratio in about one minute.
- Compact Point-of-Care Hematology Analyzer — A compact point-of-care hematology analyzer performs a complete blood count with a 3-part white blood cell differential from microliter samples using impedance counting.
- Point-of-Care HbA1c and Lipid Analyzer — A point-of-care HbA1c and lipid analyzer measures glycated hemoglobin and lipid panels from a capillary blood sample in minutes using cartridges or strips.
How do I choose the right variant?
Select by clinical need, operator skill and connectivity. Define the tests needed at the point of care and their required turnaround, then check the analytical performance against laboratory methods for the intended population. Consider sample type and volume, ease of use, cartridge or strip storage, calibration and quality control requirements, and operator lockout and certification features. Connectivity to hospital or laboratory information systems matters for record keeping and oversight. Compare cost per test, including consumables and quality control, with central laboratory testing. Confirm regulatory status for intended use, and arrange training, competency assessment and oversight by the laboratory, following ISO 22870 where applicable. Verify the supplier's ability to maintain consumable supply.
Where are Point-of-Care Diagnostics used?
Point-of-Care Diagnostics are specified in emergency department rapid testing, primary care clinic testing, anticoagulation monitoring, diabetes self-management and clinic care and remote and field health programs.
Which standards and certifications apply?
Work with Point-of-Care Diagnostics is commonly governed by ISO 22870, ISO 15197, ISO 15189, IEC 61010-2-101, CLSI POCT12, CLSI POCT14, ISO 13485 and EN 13532. Instrument certifications such as CE marking are confirmed per configuration and never assumed.
What are the key considerations before purchase?
Point-of-care testing is often performed by non-laboratory staff, so governance is essential. Establish a program covering operator training, competency assessment, quality control schedules, external quality assessment and documentation, with oversight from a laboratory. Store strips and cartridges within labeled temperature ranges and check expiry dates. Keep meters clean and disinfected between patients with approved disinfectants, since contamination with blood is a risk. Understand known interferences such as hematocrit, oxygen or medications for each device. Ensure results are transmitted to patient records, and confirm critical or unexpected values with laboratory methods. Comply with local regulations on device use, waste handling and data protection.
