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Laboratory blood coagulation analyzers that require the manual addition of reagents and specimens, processing smaller batches of specimens than automated analyzers. Most analyzers require previous centrifugation of the sample to obtain plasma samples. Semiautomated blood coagulation analyzers include an incubation container (e.g., test tube), timing devices, a clot formation detector (e.g., using photometric, electrical impedance, or mechanical impedance), and usually, some computerized capabilities for sample handling and data management. These analyzers are used in laboratories with medium or light workloads where specimens are usually tested individually, although some semiautomated analyzers can process several samples simultaneously.
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