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US 2022/0015751 A1Published application
Bone distraction devices and methods of using same
AssigneeSmall Bone Lengthening LLC
InventorÉric Chevalier
Life of this patent
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Abstract
The present disclosure provides implantable bone distraction devices and methods of using same to elongate a bone.
Claims86
A subcutaneous bone distraction device (1) comprising:
- a first block portion (3) including a pair of opposing rails (3a) and a pair of opposing ratchet sections (4);
- and
- a second block portion (3′) that slidably mates with the first block portion (3) and includes a first locking pawl (5) and a push button expansion system (5′-6-7-8-8′) for incrementally and slidably advancing the second block portion (3′) along the pair of opposing rails (3a) of the first block portion (3),
- wherein the push button expansion system (5′-6-7-8-8′) comprises an actuator (7) for receiving input from a user, a floating element (6) for transferring input from the actuator (7) into lateral motion, a second locking pawl (5′) associated with the floating element (6) and with the pair of opposing ratchet sections (4) of the first block portion (3), a first energy storage element (8) associated with the floating element (6) for returning the floating element (6) to its initial position, and a second energy storage element (8′) for returning the actuator (7) to its initial position after the lateral slidable motion has completed.
1 more element
A method of lengthening a bone in a subject, the method comprising:
- anchoring a first block portion (3) of a subcutaneous bone distraction device (1) to a first bone section (2);
- anchoring a second block portion (3′) of a subcutaneous bone distraction device (1) to a second bone section (2′);
- actuating a push button expansion system (5′-6-7-8-8′) to incrementally and slidably advance the second block portion (3′) along a pair of opposing rails (3a) of the first block portion (3);
- waiting a length of time;
- thereafter actuating the push button expansion system (5′-6-7-8-8′) to incrementally and slidably advance the second block portion (3′) along the pair of opposing rails (3a) of the first block portion (3);
- and
- repeating the steps of waiting a length of time and thereafter actuating the expansion system until the bone has been lengthened to a desired length.
4 more elements
A modular bone distraction device (2100) comprising:
- a first block portion (2103) including a pair of opposing rails (2103a,2103b) and a pair of opposing ratchet sections (2104);
- a second block portion (2103′) that slidably mates with the first block portion (103) and includes a first locking pawl (2105);
- and
- a translating expansion system (2107) for incrementally and slidably advancing the second block portion (2103′) along the pair of opposing rails (2103a,2103b) of the first block portion (2103),
- wherein the translating expansion system (2107) mates with the second block portion (2103′) and with the pair of opposing ratchet sections (2104) to enable the second block portion (2103′) to incrementally slide along the pair of opposing ratchet sections (2104), and
- wherein the translating expansion system (2107), upon activation, incrementally advances the second block portion (2103′) along the pair of opposing ratchet sections (2104).
3 more elements
A modular actuator for a bone distraction device, the modular actuator comprising:
- a first floating element (2207′) comprising at least one locking pawl (2205′);
- a second floating element (2207″) comprising at least one locking pawl (2205) and separated from the first floating element (2207′) by a baseline distance;
- at least one length of shape memory alloy (2207a) connected to the first floating element (2207′) and to the second floating element (2207″);
- and
- at least one spring (2208) connected to the first floating element (2207′) and to the second floating element (2207″),
- wherein activation of the at least one length of shape memory alloy (2207a) forces the first floating element (2207′) to come closer to the second floating element (2207″) by a reduced distance that is smaller than the baseline distance, compressing the spring (2208) and
- wherein the released energy of the spring (2208) causes the second floating element (2207″) to move away the first floating element (2207′) in order to obtain again the baseline distance for a next cycle.
4 more elements
A modular bone distraction device (2200) comprising:
- a first block portion (2203) including at least one slot or groove (2203a,2203b) parallel to a length of the first block portion (2203) and pair of opposing ratchet sections (2204) along the length of the first block portion (2203);
- a second anchor plate (2203′p) that slidably mates with the first block portion (203);
- and
- a remote-activated expansion system (2207) for incrementally advancing the second anchor plate (2203′p) along the pair of opposing ratchet sections (2204), wherein the modulate remote-activated expansion system (2207) comprises a first floating element (2207′) expandably associated with a second floating element (2207″) by a shape memory alloy (207a) and at least one spring (2208) includes a first locking pawl (2205′) and an expansion system (2207) for incrementally and slidably advancing the second block portion (2207′/2207″) along the at least one slot or groove (203a,203b) of the first block portion (2203).
1 more element
A method of lengthening a bone in a subject, the method comprising:
- anchoring a first plate of a bone distraction device to a first bone segment of the subject;
- anchoring a second plate of the bone distraction device to a second bone segment of the subject;
- thereafter associating a remotely-actuated expansion system with the first plate and the second plate;
- remotely actuating the remote-actuated expansion system, after callus bone has formed between the first bone segment and the second bone segment, to force the first plate and the second plate apart relative to each other;
- thereafter allowing additional callus bone to form between the first bone segment and the second bone segment;
- and
- repeating the steps of remotely actuating the remote-actuated expansion system and thereafter allowing additional callus bone to form between the first bone segment and the second bone segment until the bone has been lengthened to a desired extent.
4 more elements
An implantable actuator for a bone distraction device, the implantable actuator comprising:
- a first floating element (2207′) comprising at least one locking pawl (2205′);
- a second floating element (2207″) comprising at least one locking pawl (2205) and separated from the first floating element (2207′) by a baseline distance;
- at least one length of shape memory alloy (2207a) connected to the first floating element (2207′) and to the second floating element (2207″);
- an insulating membrane (2230) surrounding the shape memory alloy (2207a);
- and
- at least one spring (2208) connected to the first floating element (2207′) and to the second floating element (2207″),
- wherein activation of the at least one length of shape memory alloy (2207a) compresses the spring (2208) and forces the first floating element (2207′) to move towards to the second floating element (2207″) such that the first floating element (2207′) and the second floating element (2207″) are separated by a reduced distance that is smaller than the baseline distance;
- and
- wherein a subsequent release of energy from decompression of the spring (2208) causes the second floating element (2207″) to move away the first floating element (2207′) such that the first floating element (2207′) and the second floating element (2207″) are separated by the baseline distance.
6 more elements
An implantable actuator for a bone distraction device, the implantable actuator comprising:
- a first floating element (2207′) comprising at least one locking pawl (2205′);
- a second floating element (2207″) comprising at least one locking pawl (2205) and separated from the first floating element (2207′) by a baseline distance;
- at least one length of shape memory alloy (2207a) connected to the first floating element (2207′) and to the second floating element (2207″);
- and
- an insulating and elastic membrane (2231) surrounding the shape memory alloy (2207a),
- wherein activation of the at least one length of shape memory alloy (2207a) compresses the insulating and elastic membrane (2231), forcing the first floating element (2207′) to move closer to the second floating element (2207″) such that the first floating element (2207′) and the second floating element (2207″) are separated by a reduced distance that is smaller than the baseline distance, and
- wherein a subsequent release of energy from the compressed insulating and elastic membrane (2231) causes the second floating element (2207″) to move away from the first floating element (2207′) such that the first floating element (2207′) and the second floating element (2207″) are separated by the baseline distance.
4 more elements
Dependencies are inferred from the claim text.