Mechanical deployment device for total suture hip joint anchor

Abstract

A deployment device for a full suture anchor having a braided anchor and a suture filament extending through the braided anchor. A prong extends longitudinally through the body of the device and is movable between an extended position and a withdrawn position to position and then release the braided anchor. A spool coupled to a ratchet by a frangible link drives the ratchet to wind up the suture filament to deploy the braided anchor. When sufficient tension is achieved to fully deploy the braided anchor, the frangible link will break, releasing the suture filament, leaving the deployed braided anchor in place by the suture filament extending from the guide hole. All operations are accomplished by one lever that selectively withdraws the prong, rotates the ratchet, and then allows the filament to be released using only one hand.

Description

[0001] Cross-referencing related applications

[0002] This application claims priority to U.S. Provisional Patent No. 63 / 034,421, filed June 4, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to surgical anchors, and more particularly to a deployment device for a full suture anchor. Background Technology

[0004] Suture anchors are commonly used in surgery to fix soft tissue to bone. Full suture anchors are partially inserted into pre-formed guide holes in the bone, allowing the deployable portion of the anchor to be positioned within the bone, with fine sutures extending out of the holes to attach to the tissue being repaired. However, full suture anchors may pull out in hard bone because they cannot be deployed and retained in the same way as in softer bone.

[0005] To address this issue, deployment devices have been used to assist in the installation of full-suture anchors. However, current deployment devices require two hands to tension and / or unfold the anchors, making them cumbersome to use. Even if the deployment devices can be deployed with one hand, they still require both hands to manually open the suture from the deployment device after the anchor has been deployed. Therefore, there is a need in the art for a method that allows for easier deployment and release of full-suture anchors. Summary of the Invention

[0006] This invention relates to a deployment device for a full suture anchor having a braided anchor and a suture extending through the braided anchor, which can suitably tension the anchor for deployment and release of the suture tail. The device includes a body and a fork extending longitudinally through the body, movable between an extended position and a withdrawn position to position and release the braided anchor in a guide hole in the bone to which the anchor will be deployed. A ratchet is rotatably mounted to the body to selectively drive a spool connected to the ratchet via a brittle connector to wind up and then release the suture of the anchor. A lever mounted to the body can move the fork longitudinally within the body from an extended position to a withdrawn position and can rotate the ratchet to wind up the suture, thereby deploying the braided anchor. The lever is connected to the fork via a connector pivotally connected at a first end and connected to the fork at the opposite end via a bearing member. The bearing member includes a notch engaged by the connector when the lever is first moved from an initial position to an open position. The body includes a pawl positioned to selectively engage the ratchet. The first barrier prevents the pawl from engaging the ratchet when the lever is in the initial position; and the second barrier prevents the pawl from engaging the ratchet when the lever is in the open position. When the lever is first moved to the closed position, the pawl freely engages the ratchet. A latch releasably secures the latch in the initial position for easy installation in the drill guide. A pawl associated with the body locks the fork in the withdrawn position. The fork is withdrawn approximately 14 mm to position the fork tip approximately 6 mm below the guide hole surface. The brittle connection is configured to break in response to a force of approximately 40 pounds of tension captured by the spool on the filament. Attached Figure Description

[0007] The invention will be more fully understood and appreciated by reading the following detailed description in conjunction with the accompanying drawings, in which:

[0008] Figure 1 This is a perspective view of the fully sutured anchor deployment device according to the present invention;

[0009] Figure 2 This is a perspective view of the fully sutured anchor deployment device according to the present invention in a partially disassembled configuration;

[0010] Figure 3 Another perspective view of the fully sutured anchor deployment device according to the present invention in a partially disassembled configuration;

[0011] Figure 4 This is a partial cross-sectional view of a ratchet and spool connected by a brittle connector in the fully sutured anchor deployment device according to the present invention.

[0012] Figure 5 This is a side view of the fully stitched anchor deployment device according to the present invention in the first closed position;

[0013] Figure 6 This is a top perspective view of the fully sutured anchor deployment device according to the present invention in a first closed position and partially disassembled configuration;

[0014] Figure 7 This is a side view of the fully sutured anchor deployment device according to the present invention in the second open position;

[0015] Figure 8 This is a rear perspective view of the fully sutured anchor deployment device according to the present invention in the second open position, partially disassembled configuration;

[0016] Figure 9 This is a side view of the fully stitched anchor deployment device according to the present invention in the third closed position;

[0017] Figure 10 These are a pair of side views of the fully sutured anchor deployment device according to the invention, showing the device moving from a second open position to a third closed position; and

[0018] Figure 11 This is a side view of the fully sutured anchor deployment device according to the invention in the fourth open position, wherein the device is configured to mount any filament onto a spool via a ratchet. Detailed Implementation

[0019] Referring to the accompanying drawings, the same numbers throughout represent the same parts. Figure 1 The image shows a full suture anchor deployment device 10, which has a fork 12 extending longitudinally through and beyond a body 14, extending to the distal end of the body 14, for grasping a full suture anchor formed of a braided anchor and suture filaments. As with conventional methods, the braided anchor is captured by the fork 12, and the deployment device 10 is typically driven into a guide hole formed in the bone through a drill guide left in place. The anchor is then deployed by pulling the suture filaments, causing the braided anchor to unfold in place, with the suture tail extending out of the guide hole for securing tissue to the bone.

[0020] The device 10 includes a lever 16 that can selectively and partially withdraw the fork 12 after the anchor is inserted into the guide hole. The device 10 also includes a ratchet 18 in the body 14, which rotates via the movement of the lever 16. The ratchet 18 is coupled to the spool 20 via a brittle connector 22, such that the ratcheting effect of the ratchet 18, achieved through the lever 16 and the pusher pawl 24, will rotate the spool 20 until sufficient tension on the spool 20 causes the connector 22 to break, thus severing the connection to the ratchet 18. The spool 20 is coupled to the suture filaments of the full-stitch anchor, such that the spool 20 can be wound around the suture filaments, which are woven through the braided anchor to provide the force necessary to fully deploy the braided anchor in place. When the tension on the suture filament exceeds a predetermined force required to break the brittle connector 22, the spool 20 decouples from the ratchet 18, allowing the suture to be released freely from the spool 20, thus leaving the deployed anchor in place. The released suture filament extends from the guide hole only by withdrawing the device 10 from the surgical position. Therefore, the predetermined force required to break the brittle connector 22 is selected to ensure proper deployment of the braided anchor, and then the suture filament is released without any manual operation other than the opening and closing lever 16, which can be easily performed with one hand. In one embodiment, the brittle connector 18 may be configured to break in response to a force of approximately 40 pounds of tension on the filament to ensure proper deployment of the anchor. Figure 4 As seen, the brittle connector 18 may include a cylindrical pin having a circumferential notch 18a formed therein, such that the connector 18 breaks into two pieces in response to a predetermined amount of force. A one-way pawl 38 remains engaged with the ratchet 18 to prevent the filament from unwinding from the spool 20 when it is engaged with the ratchet 18.

[0021] like Figure 5 and 6 As seen, in the initial first position for inserting the anchor, the fork 12 of the device 10 extends fully from the body 14. The lever 16 closes against the body 14, and the pusher pawl 24 associated with the ratchet 18 disengages from the ratchet 18 via the first gate 26, so that movement of the lever 16 does not cause a ratcheting effect on the ratchet 18 and thus cause rotation of the spool 20. The lever 16 is preferably locked by the latch 30. Figure 5 In the position where the latch is pivotally mounted to the body, and as the lever 16 is preferably biased, for example by a spring or other biasing element, to the open position so that the device 10 passes through the drill guide to insert the anchor into the guide hole, the lever 16 can be held in place. Figure 1 The closed position.

[0022] refer to Figure 7 and 8After the braided anchor is positioned in the guide hole, the latch 30 is released so that when the lever 16 is unlocked from the body 14, the lever 16 can be moved to a second open position. The connector 28 is pivotally coupled to the lever 16 to allow the lever 16 to withdraw from the fork 12 when the lever 16 returns to the closed position. For example, the connector 28 can be coupled to the fork 12 via a longitudinally extending bearing member 32 fastened to the fork 12. The bearing member 32 includes a recess 34 that allows the connector 28 to be withdrawn when initially positioned... Figure 1 When in the closed position, it disengages from fork 12, but once lever 16 opens... Figure 2 When the connecting piece 28 moves into the notch 34, it engages with the fork 12. For example, when the lever 16 first opens to... Figure 2 In the second position, the connector 28 moves along the bearing member 32 until it is captured in the notch 34, thereby engaging the lever 16 to the fork 12. The pusher pawl 24 associated with the ratchet 18 continues to disengage from the ratchet 18 via the second gate 36, so that the ratchet 18 is not driven by the movement of the lever 16.

[0023] refer to Figure 9 and 10 , rod 16 from Figure 7 and 8 The position is moved to the third closed position against the main body 14, such as... Figure 9 and 10 As seen, the lever 16 drives the connector 28 to longitudinally retract the fork 12 within the body 14. In use, the fork 12 is inserted into a guide hole in the bone, such that the tip 40 of the fork 12 positions the anchor within the bone. The fork 12 is designed to retract a predetermined distance via the device 10, such that the tip 40 of the fork 12 remains within the guide hole, although not deeply during initial insertion. For example, the fork can be withdrawn 14 mm, which would place the tip of the fork 12 approximately 6 mm below the surface of a standard guide hole formed in the bone during conventional surgery.

[0024] The fork 12 is captured in the retracted position by the pawl 42 of the body 12, the pawl engaging a tongue 44 extending from the bearing member 32, such that the fork 12 remains retracted during further operation of the lever 16 of the device 10, as... Figure 11 As seen in the image. When rod 16 moves to the closed position against body 14, as... Figure 10 As seen, the blocking action of the second gate 36 releases the pawl 20 to engage with the ratchet 18, thereby allowing the ratcheting effect of the ratchet 18 and the associated rotation of the spool 20 connected to the ratchet 18 via the brittle connector 22 when the lever 16 moves. The lever 16 can then be opened to the open position, as... Figure 11As seen, this allows the push pawl 20 to initially engage the ratchet 18, and remains engaged with the ratchet 18 because the fences 26 and 36 will no longer obstruct the push pawl 20 during subsequent movement of the lever 16. Closing the lever 16 to the closed position then drives the ratchet 18, causing the spool 30 to wind up the stitching filaments extending from the braided anchor without any movement of the fork 12. Once initially reached... Figure 11 The position allows the lever 16 to be repeatedly opened and closed to gradually wind the filament onto the spool 20.

[0025] The tension of the suture filament provided by the spool 30 ensures that the braided anchor unfolds in place with the bone. When the tension applied to the suture filament by the spool 20 exceeds a predetermined tension set by the brittle connector 22, the brittle connector 22 will break, thereby decoupling the spool 20 from the ratchet 18. Therefore, the device 10 is withdrawn from the surgical position, allowing the suture filament to unwind, as the spool 20 is no longer engaged to the advance pawl or one-way pawl 38 by means of decoupling from the ratchet 18. When the device 10 is completely removed, the deployed anchor remains within the bone, and the suture filament extends from the guide hole in the standard configuration required for surgically anchoring tissue to the bone. Therefore, tensioning the suture filament to deploy the braided anchor and releasing the suture filament after deployment can be performed with one hand without further loosening the suture filament from the deployment device 10, as the spool 20 will loosen and release the filament after the brittle connector 22 has broken, without any action by the user.

Claims

1. A deployment device for a fully sutured anchor, the fully sutured anchor having a braided anchor and suture filaments extending through the anchor, the deployment device comprising: main body; A fork that extends longitudinally through the body and is movable between an extended position and a withdrawn position; A ratchet, which is rotatably mounted to the body; A spool, which is connected to the ratchet via a brittle connector; as well as A lever, which is connected to the fork, moves the fork longitudinally within the body from the extended position to the withdrawn position and to the ratchet to rotate the ratchet.

2. The device of claim 1, wherein the rod is connected to the fork via a connector.

3. The apparatus of claim 2, wherein the connector is pivotally coupled to the rod at a first end.

4. The apparatus of claim 3, wherein the connecting member is coupled to the fork via a bearing member.

5. The device of claim 4, wherein the bearing member includes a notch engaged by the connector when the rod is in the open position.

6. The device of claim 5, wherein the body comprises a pawl positioned to selectively engage the ratchet.

7. The apparatus of claim 6, wherein the body includes a first barrier that prevents the pawl from engaging the ratchet when the lever is in the initial position.

8. The apparatus of claim 7, wherein the body includes a first barrier that prevents the pawl from engaging the ratchet when the lever is in the open position.

9. The device of claim 8, wherein when the lever is in the closed position, the pawl freely engages the ratchet.

10. The apparatus of claim 9 further includes a latch capable of releasably securing the latch in the initial position.

11. The apparatus of claim 10, further comprising a pawl associated with the body and positioned to lock the fork in the withdrawn position.

12. The apparatus of claim 11, wherein the fork moves a distance of 14 mm from the extended position to the withdrawn position.

13. The device of claim 12, wherein the brittle connector is configured to break in response to a force of 40 pounds of tension captured on the filament by the spool.

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