Patent ID: 8702741
Filing Date: 2014-04-22
Classification: A61B,A61F

Abstract:
1. An injection device configured to inject a flowable substance into bone, the injection device comprising: an outer cannula including an outer cannula handle and an axial orifice opposite the outer cannula handle, the outer cannula handle including a proximal handle end and an opposed front handle end; an inner cannula insertable into the outer cannula, the inner cannula defining a proximal end and a front end spaced from the proximal end along an axial direction, the inner cannula further including an inner cannula wall that extends between the proximal end and the front end so as to define an inner axial passageway that extends from the proximal end to the front end along the axial direction, the inner cannula defining a radial aperture having an aperture distal end that extends through the inner cannula wall along a radial direction that is perpendicular to the axial direction, the proximal end of the inner cannula including an inner cannula handle, the inner cannula handle having a proximal handle end and a front handle end spaced from the proximal handle end along the axial direction, wherein 1) the front end defines a curved surface that closes the axial passageway, the curved surface being curved as it extends along the radial direction so as to guide the flowable substance flowing in the inner axial passageway to exit the cannula through the radial aperture, and 2) the curved surface is disposed beyond the axial orifice of the outer cannula when A) the inner cannula is inserted in the outer cannula, and B) the front handle end of the inner cannula handle abuts the proximal handle end of the outer cannula handle; and an obturator sized and configured to removeably slide into the outer cannula.