Suspend/resume monitoring
Measuring deep relaxation
If you temporarily stop monitoring a patient, you can preserve
the current and reference values.
When the neuromuscular block deepens, you receive no
stimulation response. TOF% is not calculated when the count is
less than four.
1. To suspend monitoring, press the
NMT
key and select
Stop
.
Relaxation Meter
100 TOF% 20
4 Count 0
10 PTC 0
Light Deep
2. To resume monitoring the same patient, press the
NMT
key
and select
Continue
.
TOF and other stimulation modes
You can use TOF (train of four), DBS (double burst), and ST
(single twitch) stimulation modes. TOF is the most common.
To monitor the relaxation level, start tetanic stimulation
(continuous 5 seconds).
In TOF, four impulses are generated at 0.5 second intervals. The
ratio of the fourth to the first response is the TOF%. The TOF%
declines as relaxation deepens. Normally, a TOF% over 90
indicates adequate clinical recovery. You can view the TOF%
and the number of responses, or count.
1. Press the
NMT
key.
2. Select
Tetanic/PTC
and select
Start.
After tetanic stimulation, single impulses are generated and the
number of responses is counted, resulting in PTC (Post Tetanic
Count). After PTC, NMT measurements stop for one minute.
Then, the previous measurement cycle continues.
30
4
0
20
NMT
TOF%
Count
Locating nerve using regional block (Plexus) stimulation
sec
1. Set up the regional block adapter, needle, and syringe.
Connect the adapter cable to the monitor cable.
1. Press the
NMT
key.
2. Connect the cable to the monitor.
2. Select
Stimulus Mode
and choose the mode.
3. Press the
NMT
key.
4. Select
Cycle Time
and choose the time.
Selecting recovery note
5. Select
Regional Block
.
If the count reaches a set limit, a single beep sounds and the
‘Block recovery’ message appears.
•
To start the stimulation, select
Run
.
•
To stop the stimulation, select
Stop
.
1. Press the
NMT
key.
2. Select
Recovery Note
and choose the count limit.
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