GE Healthcare Anaesthesia Drug Delivery - Manual (Page 6)

The Surgical Pleth Index (SPI)** is a parameter that reacts
to hemodynamic responses caused by surgical stimuli and
analgesic medications. SPI** is based on the plethysmographic
waveform amplitude and pulse interval. The SPI** measurement
is to be used for unconscious and fully anaesthetised adult
(>18 years old) patients during general anesthesia.
Surgical Pleth Index †**
Reacting to hemodynamic responses caused by surgical stimuli and analgesics
SPI** was found to have a significant
correlation with the amount of remifentanil
and reacted to painful events
4
SSI † [SPI]** values were lower in patients with
plexus block covering the sites of nociceptive
stimuli, SSI had better performance than
heart rate, BP, or Response Entropy
5
SPI** was found to correlate with the
changes of opioid delivery better than RE,
SE, HR or PPGA. However, it was not affected
by changes in the delivery of hypnotics
6
SPI** is an index that changes when the patient
reacts to painful stimulation or opioid delivery
during general anaesthesia. SPI** varies from
100 (high reactivity) to 0 (no reactivity) and
may help the user assess the nociception-
antinociception balance of the patient.
SPI** Compatibility
• CARESCAPE
* Monitor B850
(OR software and SPI** license)
• CARESCAPE Monitor B650
(OR software and SPI** license)
• An SpO
2
measuring module with
GE (Ohmeda * ) technology (E-PSM, E-PSMP,
E-PRESTN, E-RESTN)
• Finger sensor for SpO
2
(reusable or disposable)