Formed in place fixation system with thermal acceleration
View Patent ↗A subcutaneously formed in place orthopedic fixation device is provided, such as for fixation of the spine or other bone or bones. The device comprises an inflatable member, such as a tubular balloon. A heat source is provided in thermal communication with the interior of the balloon. The balloon is positioned at a treatment site while in a flexible, low crossing profile configuration. The balloon is thereafter inflated with a hardenable media, and heated to accelerate hardening of the media. Methods and delivery structures are also disclosed.
1. A formed in place orthopedic device, comprising:
an outer wall, defining a cavity therein;
a porous inner tubing positioned within the cavity;
a plurality of reinforcing fibers positioned in the cavity between the porous inner tubing and the outer wall;
a hardenable media for bonding with the reinforcing fibers to form the orthopedic device, the hardenable media flowable through the porous inner tubing into the cavity; and
a heating element for heating the hardenable media, the heating element positioned within the cavity and coiled around the porous inner tubing;
wherein the hardenable media is hardenable via heating from the heating element while the device is positioned within the body of a patient to create the formed in place orthopedic device.
2. A formed in place orthopedic device as in claim 1 , wherein the hardenable media comprises an epoxy.
3. A formed in place orthopedic device as in claim 1 , wherein the hardenable media comprises polyurethane.
4. A formed in place orthopedic device as in claim 1 , wherein the reinforcing fibers comprise carbon fibers.
5. A formed in place orthopedic device as in claim 1 , wherein the reinforcing fibers comprise graphite fibers having a diameter within the range of from about 0.003 inches to about 0.007 inches.
6. A formed in place orthopedic device as in claim 1 , wherein the reinforcing fibers are provided in at least one bundle having within the range of from about 3,000 to about 12,000 fibers.
7. A formed in place orthopedic device as in claim 6 , comprising from about 30 to about 60 bundles of fibers.
8. A formed in place orthopedic device as in claim 1 , wherein the reinforcing fibers include a fiber bundle with a Tow tensile strength within the range of from about 5,000 Mpa to about 7,000 Mpa.
9. A formed in place orthopedic device as in claim 1 , wherein the reinforcing fibers include a fiber bundle with a Tow tensile modulus within the range of from about 250 Gpa to about 350 Gpa.
10. The formed in place orthopedic device of claim 1 , wherein the heating element comprises a resistive heating element.
11. The formed in place orthopedic device of claim 10 , wherein the resistive heating element comprises a metallic stent.