Semi-Automatic Coagulation Analyzer with Chromogenic Capability

What is the Semi-Automatic Coagulation Analyzer with Chromogenic Capability?

This analyzer adds a chromogenic channel that measures colour released from a synthetic substrate by a coagulation enzyme or inhibitor, enabling assays such as antithrombin and protein C. It suits laboratories that need inhibitor and factor assays without a fully automatic platform.

Overview

Chromogenic assays use a synthetic peptide substrate that releases a coloured group, usually para-nitroaniline, when cleaved by thrombin, factor Xa or another coagulation enzyme. Absorbance at 405 nanometers is proportional to enzyme activity, and inhibitors such as antithrombin are measured by their effect on the generated activity. The analyzer therefore needs a photometer capable of reading at 405 nanometers in addition to the wavelengths used for clot detection, and the software must support kinetic reading and calibration models for these assays. Reaction times are longer than for clotting tests, and reagent volumes and incubation steps are defined precisely by the kit. Because chromogenic assays are less affected by fibrinogen concentration and sample turbidity, they complement clot-based tests and are often used to confirm or refine results.

How does it work?

A semi-automatic coagulation analyzer provides a temperature-controlled measuring position, usually at 37 degrees Celsius, a detection system and a timer. The operator pipettes plasma into the cuvette, incubates it, adds the reagent and starts the measurement. Optical instruments detect the increase in turbidity or the change in light scatter as fibrin strands form; mechanical instruments detect the change in movement or viscosity of a steel ball or magnetic particle; turbidimetric and chromogenic instruments measure light absorption changes from the fibrin network or from a coloured product released by a synthetic substrate. The analyzer stops the timer at the detection threshold and reports the clotting time in seconds, a ratio for prothrombin time or a concentration for fibrinogen. Because sample and reagent handling remain manual, pipetting accuracy and consistent incubation timing have a large influence on results.

What are the key features?

• Photometric channel reading at 405 nanometers
• Kinetic measurement of para-nitroaniline release
• Support for antithrombin and protein C assays
• Clot-based and chromogenic tests on one instrument
• Kit-defined incubation and reagent volumes
• Calibration models for activity and inhibitor assays

What are the technical specifications?

A typical semi-automatic coagulation analyzer with chromogenic capability configuration offers detection principle of Clot detection plus chromogenic absorbance at 405 nm, channels of 2 or 4 with shared photometer, incubation temperature of 37 °C ±0.3 °C, chromogenic range of 0–3.0 absorbance units at 405 nm, supported chromogenic assays of Antithrombin, protein C, heparin in some models and kinetic reading interval of From 5 s programmable. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Semi-Automatic Coagulation Analyzer with Chromogenic Capability is used in antithrombin activity measurement, protein C and protein S testing, heparin monitoring in some settings and thrombophilia screening support. Across the wider Semi-Automatic Coagulation Analyzers class, laboratories also deploy it for routine PT and APTT testing in clinics, anticoagulation monitoring with INR and pre-operative coagulation screening.

Which standards and certifications apply?

Relevant standards and methods include ISO 15189, CLSI H57, CLSI H21, CLSI EP05, ICSH recommendations on coagulation testing, IEC 61010-1 and IEC 61010-2-101. Certification candidates for this model are CE, ISO 13485 manufacturing and NMPA class II registration; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Place the analyzer on a level bench away from vibration and draughts, since both disturb optical clot detection, and allow the instrument to reach and hold 37 degrees Celsius before use. Verify performance at installation against a reference instrument or assigned plasma samples for prothrombin time, APTT and fibrinogen, and check the incubation temperature with an external thermometer. Daily work includes running normal and abnormal control plasma, checking reagent and cuvette lot numbers and recording all values. Reagents must be reconstituted, stored and expired strictly according to the instructions, and citrated plasma should be separated, frozen and thawed under controlled conditions because pre-analytical handling has a large influence on clotting times.

How do I select the right Semi-Automatic Coagulation Analyzer with Chromogenic Capability?

Specify this variant when the menu requires chromogenic assays such as antithrombin or protein C and a fully automatic analyzer is not justified. In the RFQ confirm the wavelengths available, the kinetic reading capability, the validated parameters for each chromogenic kit, and the supply of specific substrates and calibrators.

How does it compare with other Semi-Automatic Coagulation Analyzers variants?

Choose the detection principle according to the samples you receive: mechanical or magnetic detection tolerates icteric, hemolyzed and lipemic plasma, while optical detection is simpler and usually requires a clear sample. Then decide how many channels you need, because a four-channel instrument allows several patients or duplicate measurements in one run and reduces operator waiting time. Check the menu the instrument supports, especially whether fibrinogen, D-dimer or antithrombin assays are available, since not every semi-automatic platform can perform chromogenic or immunoturbidimetric tests. Confirm the sample and reagent volumes, the incubation temperature accuracy and the calibration requirements, and ask whether the analyzer stores calibrator values for each reagent lot.