Patent ID: 11857223
Assignee: SPINE WAVE, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A modular rod extender for extending a rod in an existing spinal construct, comprising:
an extender body comprising a modular attachment feature at one end and an extension rod extending from an opposite end, said modular attachment feature comprising:
a central bore extending along an axis through a top surface and a bottom surface of said extender body, said central bore having a lower portion and an upper portion, a ledge extending radially interiorly within said extender body, said ledge including an interior surface defining said central bore and having an interior diameter, said ledge including an upper contact surface facing said upper portion of said central bore and a lower surface facing said lower portion of said central bore, said upper portion having an upper opening with an innermost diameter greater than said interior diameter of said interior surface, said lower portion having a lower opening adjacent said bottom surface and a lower interior cavity communicating with said lower opening;
an expandable and contractible socket collar disposed within said lower interior cavity for axial movement therewithin, said socket collar being of size and configuration to not pass through said lower opening of said central bore, said socket collar having a central opening configured to expandably receive a head of a component of a rod connector that is connectable to said rod of said existing spinal construct;
a crown disposed within said central bore between said upper portion and said socket collar, said crown being axially movable within said central bore independently of said socket collar, said crown having a lower end configured to contact said head of said component of said rod connector; and
a retention insert disposed in said upper opening of said central bore between said top surface and said crown, said retention insert being secured to said extender body in a fixed position on said upper contact surface of said ledge allowing axial movement of said crown and said socket collar while retaining said crown and said socket collar within said central bore.