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

Amplitude of the evoked potential (CMAP or SNAP) directly reflects the number of functioning axons and is the critical parameter for assessing axonal integrity.

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

Limb cooling slows ion channel kinetics, increasing latencies and slowing conduction velocity, which can produce false-positive findings if not recognized and corrected.

Question 3

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

Accepted Answer

32°C

Answer

The minimum recommended skin temperature for upper extremity NCS is 32°C (with lower extremity at 30°C) to ensure accurate conduction velocity measurements.

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

Documenting electrode placement, measured distances, filter settings, and sweep speeds allows reproducibility and meaningful comparison with future studies.

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

The active electrode is placed over the APB muscle belly and the reference electrode approximately 3–4 cm distally at the proximal thumb IP joint, ensuring consistent and reproducible recordings.

(EDT) Electrodiagnostic Technician Certification Practice Test

(EDT) Electrodiagnostic Technician Certification Practice Test

EDT EDT Quality Assurance & Documentation