Method to introduce an implantable device to fill a bone void whilst minimising pressurisation
Inventors
COLCLOUGH, John Warren • Laycock, Phillip Anthony • Cooper, John Joseph • Waters, Russell David
Assignees
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Publication Number
US-10390954-B2
Publication Date
2019-08-27
Expiration Date
Abstract
Disclosed is an invention that provides a method of treating a bone void of a patient through the use of an implantable device whilst minimising the potential for an increase in pressure within the bone void thus avoiding embolization of the void contents into the patient's bloodstream.
Core Innovation
The invention relates to a method of reconstructing a bone void in a patient by introducing into a bone void one or more implantable devices that are substantially cylindrical. The implantable devices have convex, domed or semi-spherical shaped ends and contain one or more longitudinal channels that create a venting path for depressurisation of any contents of the bone void.
Each longitudinal channel intersects a surface of the device and extends towards an axial centerline, and the channels are tapered so that the width opening on an outer, circumferential edge is greater than the width at a base. The implantable devices further have a flat surface on an opposing longitudinal side to the one or more longitudinal channels.
The longitudinal channels and geometry allow escape of the contents of the bone void during introduction, which is described as reducing pressurisation during bone reconstruction. The disclosed approach also includes introducing the one or more implantable devices into a bone void through use of a guide tube and a pusher to facilitate free insertion into the intramedullary canal.
Claims Coverage
The partial content includes two independent claims directed to reconstructing a bone void using one or more implantable devices with longitudinal venting channels and a tapered channel geometry. Across the independent claims, the main inventive features include device shape, venting-path channels that intersect the device surface and extend toward an axial centerline, tapering of channel width from outer edge to base, and the presence of a flat surface on an opposing longitudinal side.
Substantially cylindrical implantable device with convex-ended geometry
Introducing into a bone void one or more implantable devices that are substantially cylindrical and have convex, domed or semi-spherical shaped ends.
Longitudinal venting channels extending toward the axial centerline
Containing one or more longitudinal channels where the longitudinal channels intersect a surface of the device and extend towards an axial centerline thereof to create a venting path allowing depressurisation of any contents of the bone void.
Tapered channel width from outer circumferential edge to base
The longitudinal channels are tapered such that the width of the longitudinal channels opening on an outer, circumferential edge of the implantable device is greater than its width at a base thereof.
Flat surface on an opposing longitudinal side
The implantable device has a flat surface on an opposing longitudinal side to the one or more longitudinal channels.
Bone reconstruction via device introduction
Introducing the one or more implantable devices reconstructs bone in the bone void in the patient.
Guide tube and pusher insertion to facilitate freely inserted devices
Introducing into a bone void of one or more implantable devices through the use of a guide tube and a pusher that facilitates the one or more implantable devices being freely inserted into the intramedullary canal.
Reducing pressurisation while reconstructing the bone void
A method of reconstructing a bone void in a patient while reducing pressurisation of the bone void.
Across the independent claims, bone void reconstruction is achieved by introducing one or more implantable devices that are substantially cylindrical or capsule-shaped with convex-ended geometry and include longitudinal venting channels. The venting path is defined by channels intersecting the device surface, extending toward an axial centerline, and being tapered so the opening width at the outer circumferential edge is greater than at a base, together with a flat opposing longitudinal side. In one independent claim, the method additionally uses a guide tube and pusher to facilitate freely inserted introduction into the intramedullary canal and is framed as reducing pressurisation during reconstruction.
Stated Advantages
Reduces pressurisation of the bone void during introduction and reconstruction.
Minimizes risk of embolization, including fat embolism syndrome.
Allows depressurisation of any contents of the bone void via a venting path.
Documented Applications
Treatment and reconstruction of contained bone voids, including long-bone intramedullary canals.
Use in bone defects associated with osteomyelitis.
Use in bone defects following IM nail removal.
Use with optional medicament-impregnated devices, including antimicrobial for infection and bone morphogenetic protein.
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