Patent ID: 8974505
Filing Date: 2015-03-10
Classification: A61B

Abstract:
1. A device for insertion into bone or tissue comprising: a screw defining within and by a body of the screw a plurality of cannulations of differing lengths having distal ends that do not extend out through any external surface of the device, wherein said plurality of cannulations are each parallel to a central axis of said screw, and wherein said plurality of cannulations comprise at least a first cannulation, a second cannulation, and a third cannulation, said first, second, and third cannulations configured such that an injectate flows out through said first cannulation and flows in through said second and third cannulations; and one or more fenestrations coupled to each of said plurality of cannulations, wherein the one or more fenestrations coupled to the first cannulation are one or more radial fenestrations located near a distal end of the device that extend out from the first cannulation at any angle through a surface of a sidewall of the device, and the one or more fenestrations coupled to the second cannulation are one or more radial fenestrations that are more proximal than the one or more radial fenestrations of the first cannulation and that extend out from the second cannulation at any angle through a surface of a sidewall of the device.