Odom's indicator explained

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

References

Notes and References

1. Brooks W. An epidural indicator . . 12 . 2 . 227 - 228 . April 1957 . 13424994 . 10.1111/j.1365-2044.1957.tb03619.x. free .
2. Iklé A. Preliminary report of new technique for epidural anaesthesia. . . 22 . 3 . 150 - 155 . July 1950 . 15426701. 10.1093/bja/22.3.150 . free .