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Anesth Analg 1986; 65:177-180
© 1986 International Anesthesia Research Society
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The Lumbar Subdural Extraarachnoid Space of Humans

An Anatomical Study Using Spinaloscopy in Autopsy Cases

Rune G. Blomberg, MD

Department of Anesthesia, Central Hospital, Norrköping, and the Department of Anesthesiology, Linköping University Hospital, Linköping, Sweden.

Abstract

The lumbar subdural extraarachnoid space was examined by spinaloscopy in 15 autopsy subjects. Special attention was paid to the ease with which the space opened up and also to the extent of view achieved. In ten cases the space opened up with ease, in four cases with difficulty, and in one case it was not possible to establish the subdural space at all. The bevel of an 18-gauge Tuohy needle introduced into the subdural space could be visualized in eight of 13 cases. An epidural catheter was then passed through the Tuohy needle into the subdural space in eight cases and was visualized in six of them. Although care must be exercised in drawing conclusions for clinical epidural anesthesia from autopsy cases, this study confirms the possibility of placing both the bevel of a Tuohy needle and an epidural catheter in the subdural space. The results reemphasize the need for caution suggested by other reports regarding the possibility of subdural puncture in epidural anesthesia and subsequent injection of anesthetic solution into the subdural space.

Key Words: ANATOMY—spinal canal, subdural space. • ANESTHETIC TECHNIQUES—spinal, epidural.






Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 1986 by the International Anesthesia Research Society.