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Skin conductance algesimeter is unreliable during sudden perioperative temperature increases
Ulf E Kongsgaard1,2, Robin Johansen Menchini1, Stein Gunnar Larsen3
1Department of Anaesthesia, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.
Objectives:
Pain assessment in anesthetized and non-communicative patients remains a challenge. Clinical signs such as tachycardia, hypertension, sweat and tears, have a low specificity for pain and should therefore ideally be replaced by more specific monitoring techniques. Skin conductance variability has been demonstrated to establish a patients' sensitivity to pain, but may be influenced by temperature changes that leads to profuse sweating. The aim of this pilot study was to test skin conductance changes during sudden temperature changes due to hyperthermic intraperitoneal chemotherapy (HIPEC) perfusation.
Methods:
We investigated skin conductance algesimeter (SCA) in ten consecutive patients undergoing cytoreductive surgery and HIPEC. Results from the SCA was compared to other standard physiological variables at seven time points during the surgical procedure, in particular during the period with hyperthermic intraabdominal perfusion leading to an increase in the patients core temperature.
Results:
Nine out of ten patients had an increase in the SCA measurements during the HIPEC phase correlating the increase in temperature.
Conclusion:
SCA is unreliable to detect increased pain sensation during sudden perioperative temperature changes in adult patients.
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