2022 AANEM SAE (Draft 2)

Front

What is hypoxia and how does it affect fibrillation potentials?

Back

Hypoxia is a condition in which there is a deficiency of oxygen in the tissues. It can suppress fibrillation potentials, which are electrical signals that indicate muscle activity.

Front

What are nerve conduction studies and when are they contraindicated?

Back

Nerve conduction studies are tests that measure the speed and strength of electrical signals in nerves. They are contraindicated in patients with temporary transvenous cardiac pacemakers due to the risk of interference.

Front

What is the significance of the flexor carpi radialis H-reflex latency in electrodiagnostic studies?

Back

The flexor carpi radialis H-reflex latency is used to assess the integrity of the reflex arc and can help confirm diagnoses related to nerve or muscle dysfunction.

Front

How do monopolar needles differ from concentric needles in electromyography?

Back

Monopolar needles tend to produce a higher percentage of normal units that are polyphasic compared to concentric needles, which have a smaller recording area.

Front

What factors can cause falsely low recorded amplitudes in nerve conduction studies?

Back

Falsely low recorded amplitudes can be caused by improper electrode placement, using sensory inter-electrode separation distances less than 30mm, and using active and reference electrodes of different sizes.

Front

Define alkalosis and its potential effects on muscle function.

Back

Alkalosis is a condition characterized by an increase in blood pH. It can lead to increased excitability of muscle and nerve cells, potentially affecting muscle function.

Front

What is the role of a cholinesterase inhibitor in neuromuscular transmission?

Back

A cholinesterase inhibitor prevents the breakdown of acetylcholine, enhancing neuromuscular transmission and potentially affecting muscle contraction.

Front

Explain the importance of the motor point in nerve conduction studies.

Back

The motor point is the location on a muscle where the motor nerve enters. Proper placement of recording electrodes at the motor point is crucial for accurate amplitude readings.

Front

What is the purpose of using sensory inter-electrode separation distances in nerve conduction studies?

Back

Sensory inter-electrode separation distances are used to measure the conduction velocity of sensory nerves. Distances that are too short or too long can lead to inaccurate results.

Front

Describe the function of automatic implantable cardioverter-defibrillators (AICDs).

Back

AICDs are devices implanted in patients at risk of life-threatening arrhythmias. They monitor heart rhythms and deliver shocks to restore normal rhythm when necessary.