Blood clot detector

Details Blood clot detector Blood clot detector

1998-07-10

2000-02-08

Coe, Philip R.

Chemistry: analytical and immunological testing

Clotting or clotting factor level tests

436148, G01N 27416

Patent

active

060227478

ABSTRACT:
A blood clot detector includes a pressure transducer on an aspiration line to provide output voltage data to a microprocessor corresponding to the vacuum level during aspiration. The microprocessor integrates the vacuum readings over time during the aspiration cycle to provide a pressure integral for each test sample aspiration. A pressure integral is determined for an unclotted aspiration and used as a reference for comparison with the pressure integrals of each test sample aspiration to determine whether a blood clot has interfered with the test sample aspiration. A valve is provided across an analytical line and an aspiration line to provide selective communication between the aspiration line and the analytical line or to prevent such communication. Communication between the aspiration line and the analytical line permits transfer of a test sample from the aspiration line to the analytical line if the test sample is considered acceptable for sample analysis. Acceptability of the test sample for analysis is based upon a predetermined difference between the reference pressure integral and each test sample pressure integral.

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patent: 5814275 (1998-09-01), Lewis et al.

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