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4.1.5
Temperature button (25)
When pressed, surface temperature measured by the thermistor is shown.
If the thermistor is disconnected (not mounted), no temperature will be displayed
when pressing the temperature button.
The TOF Watch has an automatic low temperature warning built-in. If the
temperature drops below 32 °C an information beep will sound and the °C (27)
will flash. Pressing the temperature button causes flashing of °C to stop.
A similar warning will sound if the thermistor becomes disconnected.
4.1.6
Timer function
The display is used to show various time-related symbols.
Stop watch showing time to next stimulation.
The center dot of the stop watch indicates that the TOF-Watch is currently performing
a stimulation.
The display normally holds a result for a period of about 15 s after a stimulation has been
performed. After this time period, the measurement is considered to be too old for proper clinical
evaluation and the result is cleared.
4.2
Primary functions
In general an attention beep will be heard, whenever a function is activated which is not
permitted. Moreover during a time-out period (for PTC and TET modes), the function will also
be flashing if the TOF-Watch is in stop mode
In case a function is allowed but only after some residual time (13.5 s for TOF, 20 s for DBS),
a count down procedure will be initiated and indicated on the display.
4.2.1
Train Of Four stimulation
short:
long:
TOF stimulation occurs in 15 second cycles. The numeric display shows the train-
of-four ratio in %, if all 4 responses were detected. When less than four responses
are detected or if the first twitch is less than 20%, only the number of responses is
displayed (without the % symbol). The TOF-Watch automatically excludes the use
of DBS and TOF for 12 s after the last TOF.
12 | TOF-Watch SX Operator manual 33.512/A
.
Starts one TOF stimulation (on demand).
Starts repetitive TOF stimulation.
press
(3)
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