Steroid delivery system

摘要

A steroid delivery system including a mixing syringe having a first chamber and a second chamber and at least one hypodermic needle is provided. The first chamber of the mixing syringe contains a pre-measured volume of a local anesthetic and the second chamber contains a pre-measured volume of a corticosteroid. An improved mixing syringe and a method for treating pain using the steroid delivery system of the present invention is also provided herein. The improved syringe achieves mixing without the introduction or elimination of air and without puncturing or rupturing of a membrane, diaphragm or other material. The kit concept improves the speed of the procedure, sterility, accuracy of dosing, and immediate availability of disparate items to implement the procedure in a variety of medical practice settings.

主权项

1. A steroid delivery system comprising:
a mixing syringe having a first chamber and a second chamber, said first chamber containing a pre-measured volume of a first injectable material, said second chamber containing a pre-measured volume of a second injectable material, and a hypodermic needle, wherein said mixing syringe further includes: a mixing assembly comprising an elongated plug disposed between said first and said second chambers, said second chamber in axial alignment with said first chamber, a cannula having an end and a lateral opening spaced apart from the end thereof, said cannula end being open to said first chamber in an inoperative position, and a retracting element attached to said cannula; wherein said elongated plug of said mixing assembly has an internal passage for slidably receiving said cannula and supporting said cannula for axial movement, said elongated plug completely covering said lateral opening of said cannula when said cannula is in an inoperative position, such that said first chamber is not in fluid communication with said second chamber; and wherein axial movement in the proximal direction of said retracting element causes corresponding axial movement of said cannula such that said cannula is retracted from said inoperative position to an operative position where said lateral opening lies within said second chamber, such that said second chamber is in fluid communication with said first chamber.