Tower tool for minimally invasive surgery
OwnerRoger P. Jackson, Lawrence E. Guerra +1inventors
InventorsRoger P. Jackson, Lawrence E. Guerra, William R. Hendricks
Life of this patent
Estimating the term…
Abstract
A rod reduction tool assembly includes an outer tube with outer tangs for engaging a bone anchor, an inner partially tubular pin support and a threaded cap mated to the outer tube and engaging the inner pin support.
Claims12
In a medical implant holding tool having engagement structure at a lower end thereof operably mateable with opposed arms of an open receiver of a bone anchor, the receiver opposed arms defining a channel for receiving a longitudinal connecting member, the improvement comprising:
- a) an elongate outer holding tool with an upper tubular portion having a top surface and a first helical thread, the tubular portion terminating at a pair of opposed downwardly extending tangs located opposite the top surface, each tang having an aperture and the engagement structure for mating with one of the arms of the bone anchor receiver;
- and
- b) a cap having a bottom surface and a second helical thread sized and shaped for mating engagement with the first helical thread of the outer holding tool, the cap bottom surface engageable with an elongate portion and wherein rotation of the cap with respect to the outer holding tool moves the elongate portion downwardly into a location against an outer surface of the bone anchor, thereby rotationally fixing the holding tool tangs with respect to the bone anchor.
In a combination of a bone attachment structure having a receiver and a medical implant holding tool having receiver attachment structure at a lower end thereof operably mateable with the receiver;
- the improvement wherein:
- a) the receiver has two arms, each arm having an undercut first surface projecting downwardly toward a bottom thereof and a curved surface located directly above the undercut surface;
- and
- b) the tool has an outer portion, an inner portion slidably received within the outer portion and a cap, the outer portion having structure in engagement with the receiver undercut surface, the inner portion having a pair of opposed pins, each pin extending through an aperture of the outer portion, the cap threadably connected to the outer portion and in abutment with the inner portion, and wherein rotation of the cap with respect to the outer portion causes the cap to press against and move the inner portion in a downward direction toward the receiver and thereby move the pair of opposed pins into engagement with the receiver arm curved surfaces.
In a medical implant holding tool having engagement structure at a lower end thereof operably mateable with opposed arms of an open receiver of a bone anchor, the receiver opposed arms defining a channel for receiving a longitudinal connecting member, the improvement comprising:
- a) an elongate outer holding tool with a tubular portion having a top surface and an inner cylindrical surface having a first helical thread, the tubular portion terminating at a pair of opposed downwardly extending tangs located opposite the top surface, each tang having an aperture and the engagement structure for mating with one of the arms of the bone anchor receiver;
- b) an inner pin support received within the outer holding tool, the pin support having an upper portion connected to a pair of opposed elongate pins, each pin sized and shaped to extend through the aperture of one of the outer holding tool tangs;
- and
- c) a cap having a bottom surface and a second helical thread sized and shaped for mating engagement with the first helical thread of the outer holding tool, the cap bottom surface engageable with the inner pin support upper portion and wherein rotation of the cap with respect to the outer holding tool moves the pins downwardly into a location against an outer surface of the bone anchor, thereby rotationally fixing the holding tool tangs with respect to the bone anchor.
Dependencies are inferred from the claim text.