barbotage

[bär′bə-täzh]
n.
  1. The production of spinal anesthesia in which a portion of the anesthetic solution is injected into the cerebral spinal fluid, which is then aspirated into the syringe and a second portion of the contents of the syringe is injected. The partial reinjections and aspirations are repeated until the contents of the syringe are used.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.