Patent ID: 9545243
Date: 2017-01-17
CPC Classifications: A61B

Claim:
1. An intraosseous (IO) needle set operable to be rotatably inserted into a bone and associated bone marrow comprising: a hollow cannula with a trocar slidably disposed therein, the trocar having a first end and a second end; the first end of the trocar extending from an associated first end of the hollow cannula; the hollow cannula having a generally elongated bore extending from a respective opening in the first end to a respective opening in a second end of the hollow cannula; the first end of the hollow cannula having a plurality of cutting surfaces disposed on exterior portions thereof immediately adjacent to the respective opening in the first end; the first end of the trocar having a plurality of tapered cutting surfaces disposed thereon; the tapered cutting surfaces cooperating with each other to form a tip on the first end of the trocar, the tip being more distal than every other portion of the trocar from the second end of the trocar; at least a first tapered cutting surface extending a first length from the tip on the first end of the trocar toward a second end of the trocar and at least a second tapered cutting surface extending a second length from the tip on the first end of the trocar toward the second end of the trocar; the length of the first tapered cutting surface greater than the length of the second tapered cutting surface; and the length of the second tapered cutting surface greater than or equal to a radius of the trocar; where the length of the first tapered cutting surface and the length of the second tapered cutting surface are measured parallel to the longitudinal axis of the trocar; where the second tapered cutting surface is defined by a plurality of vertices, at least two of the vertices lying on the tip; where the first tapered cutting surface and the second tapered cutting surface are configured to terminate proximate to the plurality of cutting surfaces disposed on exterior portions of the first end of the hollow cannula; where each of the first tapered cutting surface and the second tapered cutting surface is configured to form a seamless cutting surface with at least one of the plurality of cutting surfaces of the hollow cannula.