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British Journal of Anaesthesia, Vol 76, Issue 1 149-150, Copyright © 1996 by The Board of Management and Trustees of the British Journal of Anaesthesia

SHORT COMMUNICATIONS

Extradural and subarachnoid catheterization using the Seldinger technique

E. M. Delhaas
Department of Anaesthesia, Sophia Hospital, Dr van Heesweg 2, PO Box 10400, 8000 GK Zwolle, The Netherlands

The Seldinger technique was developed using a plastic introducer through which introduction and manipulations of a silicone spinal catheter, an extradural stimulation lead or a small diameter fibreoptic scope are possible without the risk of damage to the vulnerable devices. It is not intended as a replacement of the standard technique of introducing a spinal catheter through a Tuohy needle in general anaesthetic practice. Silicone spinal catheters and stimulation leads are used for long-term therapy in intractable chronic pain and spasticity. A fibreoptic scope is used for endoscopic examination of the subarachnoid or extradural space. Using a standard Tuohy needle the soft silicone extradural lead can be damaged easily by manipulations during insertion. For this reason the manufacturer modified the Tuohy needle for extradural silicone lead introduction. The disadvantages of this modified Tuohy needle are: first, difficulty in localization of the extradural space, second, the needle is unsuitable for a subarachnoid catheter or introduction of a fibreoptic scope. The Seldinger technique was performed 25 times in 18 patients, introducing a spinal silicone catheter (n = 14), an extradural silicone stimulation lead (n = 2) or a small diameter fibreoptic endoscope (n = 9). Paraesthesiae caused by neural irritation occurred in awake patients. This did not differ from the technique using a Tuohy needle only. Neural damage or trauma did not occur with the Seldinger technique. The incidence of post-spinal headache was the same for both techniques. No further complications were noted.
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