Outer needle of anesthetic needle assembly for epidural

摘要

A outer needle of an anesthetic needle assembly to be injected into an epidural area, has a distal end which is cut and bent to form an annular cutting edge. The distal end is gently bent so that an anesthetic needle having a forward end can slide readily out of the annular cutting edge. The annular cutting edge has a wave-like configuration with an extended circular or rectangular annulus with round corners and outwardly expanded sides.