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Odom's indicator

Odom's indicator is a device used for locating the epidural space in regional anaesthesia.[1] The device works on Dogliotti's principle[2] by finding an area of decreased resistance to injection. It was originally designed on the assumption that the pressure in the epidural space was negative. This device is no-longer popular and alternative methods (e.g. loss of resistance to saline, loss of resistance to air) are now used.

See also

  • Epidural procedure, which contains additional information on identification of the epidural space


  1. ^ Brooks W (April 1957). "An epidural indicator". Anaesthesia. 12 (2): 227–228. doi:10.1111/j.1365-2044.1957.tb03619.x. PMID 13424994.
  2. ^ Iklé A (July 1950). "Preliminary report of new technique for epidural anaesthesia". British Journal of Anaesthesia. 22 (3): 150–155. doi:10.1093/bja/22.3.150. PMID 15426701.