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Preventive Maintenance and Calibration Flashcards

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Read the first 7 Preventive Maintenance and Calibration flashcards as text

  1. When calibrating a pulse oximeter, which reference standard is most appropriate for verifying SpO2 accuracy?

    Answer: A multiwavelength CO-oximeter measuring arterial blood samples

    CO-oximetry on arterial blood samples is the gold standard for verifying pulse oximeter SpO2 accuracy because it directly measures hemoglobin saturation.

  2. A biomedical technician notices that an infusion pump's flow rate drifts 8% above the set value after 30 minutes of operation. The most likely PM corrective action is:

    Answer: Recalibrate the peristaltic mechanism and inspect tubing wear

    Flow rate drift in peristaltic pumps is commonly caused by worn tubing or a misaligned rotor, both addressed during PM through recalibration and tubing inspection.

  3. Which document should a BMET consult first to determine PM intervals for a newly acquired ventilator?

    Answer: The manufacturer's service manual and recommended maintenance schedule

    Manufacturer service manuals contain device-specific PM intervals based on engineering design life and regulatory submissions, making them the primary reference.

  4. During PM on an electrocoagulation unit, the output power is measured 15% below the displayed setting. Which step should the technician perform next?

    Answer: Adjust the internal power calibration potentiometer per service manual

    A 15% power output deviation is within the range correctable by internal calibration adjustment before component replacement is warranted.

  5. A PM checklist for a defibrillator requires verifying delivered energy at 200 J. The analyzer reads 188 J. Per AAMI standards, this result is:

    Answer: Acceptable; within the ±15% tolerance allowed

    AAMI DF80 allows defibrillator delivered energy to be within ±15% of the selected setting; 188 J is a 6% deviation and therefore acceptable.

  6. What is the primary purpose of recording 'as-found' data before making any PM adjustments?

    Answer: To document the device's condition prior to servicing for trending and audit purposes

    As-found data captures the device's pre-PM state, enabling performance trending, failure pattern analysis, and regulatory audit trails.

  7. A technician is performing PM on a patient-controlled analgesia (PCA) pump and must verify occlusion alarm response. The correct test method is:

    Answer: Block the outlet tubing and measure elapsed time to alarm activation

    Occlusion alarm testing requires physically blocking fluid flow at the outlet and confirming the pump alarms within the manufacturer's specified time limit.