Timer Function; Primary Functions; Train Of Four Stimulation; Hz Stimulation - Mainline Medical TOF-Watch S Operator's Manual

4.1.5

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 mode), 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.
4.2.2

1 Hz stimulation

short:
long:
The display shows the twitch height of the last response. However, this is only valid
when the twitch has been calibrated. If the TOF-Watch has not been calibrated
after switching on, the
control twitch value is used for the calculation.
12 | TOF-Watch S Operator manual 33.516/A
.
Starts one TOF stimulation (on demand).
Starts repetitive TOF stimulation.
%
Starts one stimulation (on demand).
Starts repetitive 1Hz stimulation.
will flash together with the % and an internal reference
press (3)
press (24)