Skip to main content
Select Source:

epidural

epidural Epidural strictly means ‘on the dura’. In anatomical usage it means outside or around the dura mater, which is the outermost of the membranes (meninges) that ensheath the brain and spinal cord. In the vertebral canal there is a narrow space between the dura mater and the lining (periosteum) of the bones; local anaesthetic injected into this space abolishes sensation from those parts of the body served by nerves that enter the spinal cord below the level of injection. In the skull, the dura has two layers, and the outermost is itself the lining of the bone and firmly adherent to it. Head injury that involves fracture in the region of the temple where there are particularly vulnerable blood vessels, can lead to an epidural (‘extradural’) collection of blood, stripping the dura from the bone, and requiring drainage by trephining to alleviate compression of the brain.

Stuart Judge


See anaesthesia, local; analgesia; labour; meninges; surgery.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"epidural." The Oxford Companion to the Body. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"epidural." The Oxford Companion to the Body. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/medicine/encyclopedias-almanacs-transcripts-and-maps/epidural

"epidural." The Oxford Companion to the Body. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/medicine/encyclopedias-almanacs-transcripts-and-maps/epidural

epidural

epidural (extradural) (epi-dewr-ăl) adj. on or over the dura mater. e. anaesthesia suppression of sensation in the lower part of the body by injecting a local anaesthetic into the epidural space, which anaesthetizes spinal nerve roots. It is used especially to provide pain relief during childbirth or to reduce the need for deep general anaesthesia. e. space the space between the dura mater of the spinal cord and the vertebral canal.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"epidural." A Dictionary of Nursing. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"epidural." A Dictionary of Nursing. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/epidural

"epidural." A Dictionary of Nursing. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/epidural

epidural

ep·i·du·ral / ˌepiˈd(y)oŏrəl/ • adj. Anat. & Med. on or around the dura mater, in particular, (of an anesthetic) introduced into the space around the dura mater of the spinal cord. • n. an epidural anesthetic, used esp. in childbirth to produce loss of sensation below the waist.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"epidural." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"epidural." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/epidural

"epidural." The Oxford Pocket Dictionary of Current English. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/epidural