Can the “Sympatho-Galvanic Reflex” (Skin Conductance Response) Be Used to Evaluate the Extent of Sympathetic Block in Spinal Analgesia?
Article first published online: 30 DEC 2008
© 1984 Acta Anaesthesiologica Scandinavica Fonden
Acta Anaesthesiologica Scandinavica
Volume 28, Issue 5, pages 578–582, October 1984
How to Cite
Löfström, J. B., Malmqvist, L. Å. and Bengtsson, M. (1984), Can the “Sympatho-Galvanic Reflex” (Skin Conductance Response) Be Used to Evaluate the Extent of Sympathetic Block in Spinal Analgesia?. Acta Anaesthesiologica Scandinavica, 28: 578–582. doi: 10.1111/j.1399-6576.1984.tb02123.x
- Issue published online: 30 DEC 2008
- Article first published online: 30 DEC 2008
- Received 21 December 1983 accepted 14 February 1984
- Skin conductance response;
- spinal analgesia;
- sympathetic block
The skin conductance response (SCR) (the “sympatho-galvanic reflex”) was studied in volunteers and in a few patients undergoing spinal analgesia. Electrical stimulation over the clavicle, breath-holding during inspiration, a short, deep breath and a sharp sound provoked a marked change in conductance not only in the hand and foot but also in dermatomes T5, T9, T12-L1. Thus, the SC response can be used to study sympathetic activity not only in the hand and foot, but also on the chest and abdomen. Electrical stimulation over the clavicle or a short, deep breath were the best means of provoking SC responses in patients receiving spinal analgesia. This restricted pilot study indicates that skin conductance response is maintained at dermatome levels far below anaesthetised levels during spinal analgesia, and a larger study is now under way to investigate these results further.