Which may be a source of error in electromechanical clot detection methods?

Which may be a source of error in electromechanical clot detection methods?

• A. Sample carryover
• B. Inaccurate pH of reagents
• C. Low temperature during analysis
• D. Improper calibration of the centrifuge

Answer: (A)

Electromechanical clot detection relies on sensing the physical change that occurs as a clot forms in the sample. If there is carryover from a previous specimen, residual clot material or altered plasma components can be carried into the current test. This can seed clot formation or interfere with the sensor’s signal, leading to a clotting reading that does not reflect the patient’s actual sample. The result may be falsely fast or falsely slow clot times, compromising accuracy. Other factors like reagent pH, low temperature, or centrifuge calibration affect different aspects of testing, but they are not as directly tied to the detection mechanism of this method, making sample carryover the most likely source of error in electromechanical clot detection.

Electromechanical clot detection relies on sensing the physical change that occurs as a clot forms in the sample. If there is carryover from a previous specimen, residual clot material or altered plasma components can be carried into the current test. This can seed clot formation or interfere with the sensor’s signal, leading to a clotting reading that does not reflect the patient’s actual sample. The result may be falsely fast or falsely slow clot times, compromising accuracy. Other factors like reagent pH, low temperature, or centrifuge calibration affect different aspects of testing, but they are not as directly tied to the detection mechanism of this method, making sample carryover the most likely source of error in electromechanical clot detection.