EDT EDT Quality Assurance & Documentation

Question 1

When documenting nerve conduction study results, which parameter is most critical to report for evaluating axonal integrity?

Accepted Answer

Amplitude of the evoked potential

Answer

Conduction velocity only

Answer

Peak latency and amplitude together

Answer

Skin temperature at the time of testing

Question 2

Temperature correction in nerve conduction studies is important because:

Accepted Answer

Cooler temperatures slow conduction velocity and prolong latencies, potentially mimicking neuropathy

Answer

Warmer limbs produce lower amplitude potentials

Answer

Temperature does not affect NCS parameters

Answer

Warmer temperatures cause conduction block

Question 3

The minimum skin temperature recommended for routine nerve conduction studies in the upper extremity is:

Accepted Answer

32°C

Answer

25°C

Answer

37°C

Answer

20°C

Question 4

In an EDX report, it is important to include which of the following to ensure reproducibility?

Accepted Answer

Electrode placement sites, distances measured, filter settings, and sweep speeds used

Answer

Patient's insurance information

Answer

The technician's personal interpretation of the findings

Answer

Only the numerical values without reference ranges

Question 5

What is the standard interelectrode distance recommended for recording the median motor CMAP from the abductor pollicis brevis (APB)?

Accepted Answer

3 cm

Answer

1 cm

Answer

8 cm

Answer

Distance is not standardized for this study

Question 6

Which of the following is a common technical artifact that can falsely prolong distal latency in motor NCS?

Accepted Answer

Recording electrode placement over the tendon rather than the muscle belly

Answer

High filter settings

Answer

Increasing stimulus duration

Answer

Using a low-impedance ground electrode