Self Switching Off; Instructions For Use; Use Of The Device - VYGON PLEXYGON Manual De Usuario

At this time the battery should be changed as soon as possible, and before
proceeding with further blocks .

2.7.8 Self switching off

If the set current is set at zero for 15 minutes without any further ajustment
on any stimulator selector, the stimulator will automatically switch off .

3. INSTRUCTIONS FOR USE

3.1

Use of the device

The stimulator must be used by qualified personnel and only
after completely reading the enclosed manual of instructions
for use. These personnel must also have a sound knowledge
of anatomy and neuro-physiology, and knowledge of the protocols
in force for the execution of peripheral blocks.
The recommended approach is the following:
- start the search with impulses of relatively high intensity: for most cases an
impulse of 300 µs of duration with a charge of 300 ÷ 600 nC (1.0 ÷ 2.0 mA)
is recommended;
- once the searched nerve has been identified, decrease progressively the
intensity of the stimulus up to 90 - 150 nC (0.3 - 0.5 mA) in order to
improve the position of the needle tip;
- if necessary, the precision of the positioning of the needle tip can be further
improved by decreasing the current / charge (in this case the "Precision"
feature will be automatically activated), or by selecting shorter impulse
durations (100 or 50 µS)
- once the required muscle contraction has been identified with the
appropriated charge, following aspiration with a syringe, it's possible to inject
a test dose of anaesthetic drug (around 1 ml).
The injection of anaesthetic drugs causes a variation of
the nerve response to the stimulation; therefore after
the injection it will not be possible to maintain the
stimulation at the same levels of current.
Always test for aspiration of blood before any injection.
Using lower charge allows further precision but implies
higher risks of direct contact with the nerve.
Once verified that the test dose has been successful, inject the full dose
required .
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