Idmed Algiscan, Руководство пользователя

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User Manual AlgiScan 21
« PPI » Mode
The PPI test gives the depth of patient’s analgesia through the PPI score.
The PPI score is used only for sedated, non-communicative patients with an analgesia level
that allows them to tolerate a minimum level of infra-nociceptive stimulus (minimum Tetanus
stimulus 10 mA, 100 Hz with a duration of 1s).
The operating principle is to apply to the patient a continuous infra-nociceptive
stimulation and increasing it in intensity until a pupillary variation upper 13%. When the pupil
size variation is over 13% the stimulation is stopped and AlgiScan calculates the PPI score.
Each stage of electrical stimuli has a duration of 1s with stages at 10, 20, 30, 40, 50 and 60 mA.
PPI score scale:
Maximum intensity achieved
by stimulation in mA
PPI
Scale
Level of pupillary reactivity in the patient
10 9
The pupil’s variation is more than 13% during the
10 mA stimulation stage
20 8
The pupil’s variation is more than 13% during the
20 mA stimulation stage
30 7
The pupil’s variation is more than 13% during the
30 mA stimulation stage
40 6
The pupil’s variation is more than 13% during the
40 mA stimulation stage
50 5
The pupil’s variation is more than 13% during the
50 mA stimulation stage
60 (1s) 4
The pupil’s variation is more than 13% during the
60 mA stimulation stage
60 (1s) 3
The pupil’s variation is more than 13% during the
second 60 mA stimulation stage
60
(5%<pupillary dilation<13%)
2
The pupil’s variation is more than 5% during the
last 60 mA stimulation stage
60 mA
(Pupillary dilation <=5%)
1
The pupil’s variation is less than 5% during the
last stimulation step at 60 mA
Adjustment of PPI score: One point is added to PPI score if the dilation of the pupil is over 20% .
To select « PPI » mode
To start a PPI mode:
• Select the required recording folder
• Position the AlgiScan in PPI mode via the “Mode Selection” menu
• Return to the measurement screen by pressing the following symbol
• Set up Algiscan on the selected patient’s eye
• Patient’s pupil must be centred on the screen and completely coloured green
• Start recording by pressing the main button (Caution: the test only start if the electrode
conduction/impedance indicator is green)
• Hold the main button throughout the recording