20 Monitoring NMT
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Double-Burst Stimulation (DBS)
The Double-Burst stimulation pattern consists of a sequence of 3 current pulses delivered every 20
milliseconds (50 Hz), followed by a pause of 750 milliseconds, followed by another sequence of 3
current pulses delivered every 20 milliseconds (50 Hz). With each detected muscle response the DBS
Count (
DBScnt) value is incremented.
Preparing to Measure NMT
The IntelliVue NMT Module is intended to be used only with adult and pediatric patients.
Skin Preparation for Electrode Placement
Good electrode-to-skin contact is important for a good stimulation pulse. Insufficient cleaning of the
skin can cause high skin resistance which could cause the stimulation to stop.
1 Select sites with intact skin, without impairment of any kind.
2 Clip or shave hair from sites as necessary.
3 Wash sites thoroughly with soap and water, leaving no soap residue.
Do not use ether or pure alcohol as this dries the skin and increases the resistance.
4 Dry the skin thoroughly.
Placing the NMT Electrodes and Transducer
Stimulation of the ulnar nerve in the wrist is preferred for routine monitoring.
CAUTION
To avoid unintentional electrical shocks always make sure that the NMT stimulation has been stopped
before touching the electrodes.
NOTE
Ensure that the thumb can move freely before applying the NMT sensor.
Place the electrodes on the prepared site over the ulnar nerve on the palmar side of the wrist; refer to
the figure below.
1 Black cable clamp
2 Red cable clamp
3 Transducer
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