The Collaborative International Dictionary of English v.0.48:

Acutorsion \Ac`u*tor"sion\, n. [L. acus needle + torsion.]
   (Med.)
   The twisting of an artery with a needle to arrest hemorrhage.

   Note: [Not in Stedman -- an obsolete procedure?][archaic] AS
         [Webster 1913 Suppl. +PJC]