Introducer Needle and Stylet for Interventional Procedures

A needle assembly comprising:

• an introducer tube extending along an axis and providing a central lumen and sized for percutaneous introduction through the skin of a patient;
• a stylet having a tip and being slidably receivable coaxially within the introducer tube to extend therethrough to expose the tip from a distal end of the introducer tube;
• at least one of an inner surface of the introducer tube and outer surface of the stylet providing an axial channel allowing a flow of liquid along the channel when the stylet is inserted in the introducer tube;
• and
• a flow control assembly attached to a proximal end of the introducer tube and providing an axially extending chamber interconnecting the central lumen, an introduction port adapted to receive anesthetic from a syringe or the like, and a stylet port through which the stylet may be received before entering the lumen of the introducer tube;
• wherein the axial channel provides a passageway between the introduction port and the distal end of the introducer tube.