ECG Equipment and Maintenance Flashcards

What is the purpose of the 60 Hz notch filter on an ECG machine?

Answer: Eliminate AC power line interference

The 60 Hz notch filter eliminates electrical interference from AC power lines, which is a common source of noise in US clinical environments.

Which component of the ECG machine converts analog electrical signals to digital data?

Answer: Analog-to-digital converter (ADC)

The analog-to-digital converter (ADC) transforms the continuous analog voltage signals from electrodes into discrete digital values for processing and storage.

How should ECG electrode gel be applied to ensure good conductivity?

Answer: Thin uniform layer between electrode and skin

A thin, uniform layer of conductive gel reduces impedance between the electrode and skin, improving signal quality without causing electrode movement.

What is the recommended storage condition for ECG thermal paper?

Answer: Cool, dry environment away from heat and chemicals

ECG thermal paper should be stored in a cool, dry place away from heat, chemicals, and sunlight to prevent premature darkening of the thermal coating.

What does a jagged, irregular baseline on an ECG tracing most likely indicate?

Answer: Poor electrode contact or muscle artifact

A jagged, irregular baseline is typically caused by poor electrode contact, patient movement, or muscle tremor artifact rather than a cardiac dysrhythmia.

When should an ECG machine undergo preventive maintenance calibration?

Answer: According to the manufacturer's schedule, typically annually

ECG machines require periodic preventive maintenance and calibration per manufacturer guidelines, usually annually, to ensure accurate and reliable recordings.