IONM (NIM) System Setup And Signals Interpretation

Question 1

Answer 1

Bipolar

Question 2

Answer 2

Low amplitude, fractioned, high frequency EMG signal

Question 3

Answer 3

100us

Question 4

Answer 4

Below 0.2

Question 5

Which muscle activity does the red electrode capture?

Answer 5

Styloglossus, transverse/vertical

Question 6

**what ahi range is indicated for the genio therapy?

Answer 6

15-65

Question 7

**what are the 3 main selection criteria for patients receiving genio

Answer 7

1) ahi 15-65
2) refused, not tolerated, or failed cpap
3) less than a 25% mixed and central apnea of the total apnea

Question 8

What are the recommended electrodes for HGNS implant procedures?

Answer 8

Prass paired with insulation opening, bipolar, 12-18mm (18mm preferred)

Question 9

When setting up a NIM system, what is the recommended rate and pulse width for the probe?

Answer 9

Rate: 7/s
Pulse: 100us

Question 10

How many electrodes in total are there and where are they placed?

Answer 10

4 total, 2 pairs. One pair on each side of the Genioglossus muscle, and one pair on each side of the styloglussus/hyoglossus

Question 11

When do you put the electrodes in the patient’s tongue ?

Answer 11

Before putting on the sterile drape, after intubation

Question 12

How many mA should you use when identifying the HGN as a whole?

Answer 12

.5-.8

Question 13

How many mA should you use when identifying inclusionary and exclusionary branches of HGN?

Answer 13

.15-.5