BONE AND JOINT STABILIZATION DEVICE FEATURES AND DELIVERY SYSTEMS
Components and associated methods of manufacture or assembly and/or use for bone and joint stabilization devices or systems are described. Details hereof focus on features of the subject anchoring heads, spring members and associated handling features, delivery devices and/or kitted systems.
1 . A medical device comprising:
an implant comprising an elongate body and an oblong anchor rotatably attached at a distal end of the elongate body; and
a delivery system comprising a sheath for covering the elongate body and at least a portion of the anchor, a pusher received within a proximal end of the sheath;
wherein the pusher has an angled distal end configured to rotate the oblong anchor upon contact therewith when the anchor is free of the sheath.
2 . The medical device of claim 1 , comprising a dual spring rate actuator.
3 . The medical device of claim 2 , wherein a first spring provided in the actuator has a first spring rate, and second spring in the actuator has a higher second spring rate, thereby providing for staged actuation of the sheath and pusher with a single user input motion.
4 . The medical device of claim 3 , wherein the first and second springs are concentrically arranged.
5 . The medical device of claim 1 , comprising a releasable handle.
6 . The medical device of claim 5 , wherein the releasable handle is loaded with at least one anchoring head configured for securing position of the elongate body at a position opposite the oblong anchor serving as an anchoring foot.
7 . A loader for applying an anchor over an elongate member, the loader comprising:
a body including a channel or tunnel portion configured to receive the elongate member; and
a plurality of flexible extensions from the body, each of the flexible extensions including an overhanding tip configured to retain the anchor.
8 . The loader of claim 7 , wherein an interior surface of each tip is ramped to permit anchor release when the anchor and the loader are pulled apart.
9 . The loader of claim 7 , further comprising the anchor and wherein a socket adjacent the extensions only permits receipt of the anchor within the tips when the anchor is inserted in the loader in the permitted direction.
10 . A medical device comprising:
an elongate spring member comprising a plurality of cells including deflectable lateral beams connected at an outer extent and an extension section;
an oblong anchor rotatably connected at a distal end of the spring member extension section, and
an introduction needle extending past the oblong anchor.
11 . The medical device of claim 10 , wherein the needle is formed integrally with the spring member extension section.
12 . The medical device of claim 11 , wherein a waist section connects the needle to the spring member extension section and the waist section is formed perpendicular to the deflectable beams.
13 . The medical device of claim 10 , wherein the needle is tied by at least one strand to the spring member extension section through an eyelet.
14 . The medical device of claim 10 , wherein the needle is formed integrally with the oblong anchor.
15 . A medical device comprising:
an elongate implant configured as a spring member comprising a section having a plurality of cells including deflectable lateral beams connected at an outer extent, and
a needle including at least one detent feature for spring member engagement and disengagement, engaged with the spring member.
16 . A medical device comprising:
an elongate spring member comprising a section including a plurality of cells including deflectable lateral beams connected at an outer extent;
a screw head including a bone screw section and a proximal machine-screw section; and
a socket, the socket configured to receive the spring member at a proximal end and the machine-screw interface of the screw head at a distal end.
17 . The medical device of claim 16 , wherein the machine screw section includes at least one flat portion to provide a driver interface for the screw head.
18 . The medical device of claim 1 , wherein a distal end of the elongate spring member includes a tab having and eyelet, and a pin is received by the socket and through the eyelet.
19 . The medical device of claim 18 , wherein a portion of the tab is located outside the socket to provide a driver interface for the spring member and socket.
20 . The medical device of claim 1 , further comprising a proximal anchor engaged with the spring member.
21 - 30 . (canceled)