BTC BTC Biomedical Equipment Calibration & Testing 2

Question 1

What is a 'test uncertainty ratio' (TUR) and why does it matter in calibration?

Accepted Answer

Ratio of the calibration standard's accuracy to the device's tolerance, should be at least 4:1

Answer

A TUR of at least 4:1 means the calibration standard is four times more accurate than the device tolerance, ensuring the calibration itself is reliable.

Question 2

When testing electrical safety on patient-connected equipment, what does 'chassis leakage current' measure?

Accepted Answer

Unintended current flowing from the device chassis to ground through a patient

Answer

Chassis leakage current is the unintended current that could flow from the device's chassis through a patient to ground, posing an electrocution risk.

Question 3

According to ANSI/AAMI ES60601-1, what is the maximum allowable chassis leakage current for patient-connected equipment in normal condition?

Accepted Answer

100 µA

Answer

ANSI/AAMI ES60601-1 limits chassis leakage current to 100 µA in normal condition to prevent harm to patients.

Question 4

What is the purpose of a 'load test' when calibrating a defibrillator?

Accepted Answer

To verify that the delivered energy output matches the selected energy setting into a known resistance load

Answer

A load test verifies that the defibrillator delivers the correct energy (in joules) into a standard resistive load, ensuring therapeutic doses are accurate.

Question 5

Which calibration tool is specifically required when calibrating a pulse oximeter?

Accepted Answer

Functional SpO2 simulator that generates optical signals

Answer

A functional SpO2 simulator generates optical test signals that mimic various saturation levels, allowing verification of the oximeter's readings.

(BTC) Biomedical Technician Certification Practice Test

(BTC) Biomedical Technician Certification Practice Test

BTC BTC Biomedical Equipment Calibration & Testing 2