... In a recent article published in the journal Anesthesia & Analgesia, researchers from the University of Virginia Health Sciences Center, Charlottesville have performed a preliminary test using magnetized anesthetic fluid under the control of a weak magnetic field to control the spread of anesthetic medications. The lead author of the study, Robert H. Thiele, MD, and colleagues have built a mockup of the human spine using plastic tubing filled with fluid. ... What they found was that ... when a magnetic field was applied, the ferro-fluid could direct the medications either up or down the tu...