Implantable bone-lengthening device
First Claim
1. An extramedullary elongation device for lengthening one or more bones, the device to be implanted adjacent to the bone and under the skin of a patient using minimally invasive techniques, the device comprising:
- a frame having smooth edges and an end with a smooth contour;
a first plate attached to the frame and configured to be secured to the bone, the first plate having smooth edges;
a second plate configured to be secured to the bone, the second plate having smooth edges;
a rod linked to the first plate;
an actuator secured either to the rod or the second plate; and
a block secured to the second plate, the block linked to the rod such that actuation of the actuator results in displacement of the second plate relative to the first plate;
wherein the device has a cross-sectional diameter of less then about 3.0 cm.
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Accused Products
Abstract
The invention relates to implantable bone-lengthening devices that are not placed intra-medullarily, but are placed extramedullarily, i.e., outside of the bones, but under the skin. The devices do not require exposed hardware (that leads to infection) or skin and muscle penetration from the pins (that cause pain), and produce minimal scarring from pin sites because the devices are placed under the skin of a patient using minimally invasive techniques. The devices may be designed with smooth contours to enable implantation using minimally invasive techniques. The devices may be actuated using an actuator that is externally or internally powered. In the case of external power, the devices may be powered remotely through high frequency transmission of power through the skin. Also included are bone-lengthening devices having fluid reservoirs and conduits for storing and delivering therapeutic fluids to treatment sites.
261 Citations
35 Claims
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1. An extramedullary elongation device for lengthening one or more bones, the device to be implanted adjacent to the bone and under the skin of a patient using minimally invasive techniques, the device comprising:
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a frame having smooth edges and an end with a smooth contour;
a first plate attached to the frame and configured to be secured to the bone, the first plate having smooth edges;
a second plate configured to be secured to the bone, the second plate having smooth edges;
a rod linked to the first plate;
an actuator secured either to the rod or the second plate; and
a block secured to the second plate, the block linked to the rod such that actuation of the actuator results in displacement of the second plate relative to the first plate;
wherein the device has a cross-sectional diameter of less then about 3.0 cm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for straightening a spine of a patient, the method comprising:
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creating an incision in the skin over a rib cage of the patient;
implanting the elongation device of claim I using a minimally invasive technique by inserting the end of the frame into the incision, and then sliding the remainder of the device through the incision;
securing the first plate to the first rib;
securing a second plate to the second rib; and
closing the incision in the patient. - View Dependent Claims (26)
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27. An extramedullary elongation device for lengthening one or more bones, the device to be implanted adjacent to the bone and under the skin of a patient using minimally invasive techniques, the device comprising:
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a first plate attached to the frame;
a second plate;
a rod linked to the first plate;
an actuator secured either to the rod or the second plate;
a block secured to the second plate, the block linked to the rod such that actuation of the actuator results in displacement of the second plate relative to the first plate; and
screws for securing the first plate and second plate to a bone, wherein the screws are no more than about 50 mm in length. - View Dependent Claims (28, 29, 30, 31, 32)
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33. An elongation device for lengthening one or more bones, comprising:
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an actuator;
a first member configured to be secured to the bone;
a second member configured to be secured to the bone and operably connected to the first member such that actuation of the actuator results in displacement of the second member relative to the first member;
a fluid reservoir connected to a conduit; and
a pump operative to pump fluid from the fluid reservoir through the conduit upon actuation of the actuator. - View Dependent Claims (34, 35)
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Specification