The invention relates to a suspension device which is implantable into the human or animal body, particularly for connecting soft tissue (i.e. tendon or ligament) to bone, an assembly device for assembling the implantable suspension device and a method for assembling the implantable suspension device.
Implantable suspension devices, also termed cortical fixation devices (CFD), are widely used to fix soft tissue (i.e. tendon or ligament grafts) to bone during surgical procedures such as anterior cruciate ligament (ACL) reconstruction, Achilles tendon repair, biceps tendon repair, meniscus root repair or rotator cuff repair. Such devices commonly comprise a suture element used to connect the soft tissue to the device and a suspension plate or button attaching to the bone.
In the known implantable suspension devices according to the prior art, the suture element forms a closed loop, which requires the soft tissue to pass across the loop and fold in order to be connected to the suspension device, resulting in the closed loop contacting the middle part of the folded implant.
However, the other side of the folded graft is open, requiring the use of an interference screw to press-fit the implant into a bone tunnel.
Additionally, in many cases, it is not possible to fit the folded implant to the closed loop for cortical fixation.
Therefore, the objective underlying the present invention is to provide an implantable suspension device which is improved in view of the above-stated disadvantages of the prior art.
This objective is attained by the subject matter of the independent claims 1, 17, 22, 42 and 64. Embodiments of the invention are stated in sub claims 2-16, 18-21, 23-41, 43-63 and 65-71 and are described hereafter.
A first aspect of the invention relates to an implantable suspension device for fixing an elongated flexible implant (e.g. a ligament or tendon graft) or tissue (such as bone tissue) in a desired position, wherein the implantable suspension device comprises a suspension plate and a suture element engaging with the suspension plate, wherein the suture element comprises a first end section extending from the suspension plate to a first end, particularly a free first end, of the suture element, and a second end section extending from the suspension plate to a second end, particularly a free second end, of the suture element, wherein the second end section comprises a connecting section configured to be connected to the implant or to a medical textile, particularly by stitching or felting.
In particular, the implantable suspension device (also termed cortical fixation device) is suitable for fixing soft tissue, e.g. a tendon or ligament graft, to a bone. Medical applications of such suspension devices include anterior cruciate ligament (ACL) reconstruction, Achilles tendon repair, biceps tendon repair, meniscus root repair or rotator cuff repair. In particular, in case of an ACL reconstruction, the suspension plate, particularly its rear side, is configured to butt against the tibia or femur of the patient, wherein particularly the second end section extends through a bore hole drilled into the tibia or femur.
In the context of the present specification, the term suspension plate (also termed button) designates a member being configured to secure an implant, particularly a tendon or ligament graft, at its desired location, particularly in a bone tunnel. In particular, in its desired location, the suspension plate abuts a bone adjacent to (outside of) a bone tunnel harboring at least a section of the implant.
In the context of the present specification, the term suture element designates an elongated and flexible member (such as a thread, a ribbon or a wire) configured to be connected to tissue by stitching. The suture element may be from any suitable material, e.g. natural or synthetic fabric, polymers or metal.
The expression “a suture element engaging with the suspension plate” means that the suture element is mechanically connected to the suspension plate, e.g. by insertion of the suture element into at least one through-hole of the suspension plate.
In contrast to implantable suspension devices of the prior art which use a closed suture loop for connection to the middle portion of a folded implant, the suspension device according to the present invention allows to fix one end of an unfolded implant to the connecting section, such that the other end of the implant is free, particularly for connecting a further suspension device. Thus, the suspension device according to the invention can be more easily connected to an implant, and the resulting assembly is more versatile compared to the prior art.
In certain embodiments, the connecting section is positioned at the second end of the suture element.
In certain embodiments, the suture element forms a first locking loop for pressing the first end section of the suture element against the suspension plate and thereby locking the first end section with respect to the suspension plate. In particular, the first locking loop is configured to receive the first end section, such that the first end section extends through the first locking loop.
The locking loop provides a self-locking mechanism eliminating the need for separate fixing means to attach the suture element to the suspension plate.
In certain embodiments, the second end section comprises an adjustable first suspension section between the suspension plate and the connecting section, wherein the first suspension section is configured to be shortened by pulling on the first end section of the suture element, wherein particularly the first end section protrudes out of the first locking loop.
Using the first suspension section, the length of the first suspension section may be adjusted to the needs of the individual patient in an easy manner, particularly adjusted to the length of the bone tunnel.
In certain embodiments, the suspension plate comprises a front side and a rear side, which rear side faces away from the front side.
In certain embodiments, the suspension plate comprises a plurality of through-holes, each through-hole extending from the front side to the rear side of the suspension plate, wherein the suture element extends through the through-holes.
In certain embodiments, the plurality of through-holes is formed by at least three through-holes. In certain embodiments, the plurality of through-holes is formed by 3, 4 or 6 through-holes.
In certain embodiments, the suture element extends through a first-through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate, with the first end ahead, particularly such that the adjustable first suspension section is formed on the rear side of the suspension plate.
In certain embodiments, the suture element further extends through a second through-hole of the plurality of through-holes from the front side to the rear side of the suspension plate, with the first end ahead, particularly such that the first locking loop is formed on the front side of the suspension plate.
In certain embodiments, the suture element further extends through a third through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate with the first end ahead. In particular, the first end section of the suture element further extends through the first locking loop for clamping the first end section to the front side of the suspension plate by means of the first locking loop with a locking force.
In certain embodiments, the suture element further extends through a fourth through-hole of the plurality of through-holes from the front side to the rear side of the suspension plate with the first end ahead.
In certain embodiments, the suture element further extends through a fourth through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate with the second end ahead, particularly such that the suture element forms a second suspension section between the connecting section and the suspension plate.
In certain embodiments, the suture element further extends through a fifth through-hole of the plurality of through-holes from the front side to the rear side of the suspension plate with the second end ahead, particularly such that a second locking loop for pressing the second end section against the suspension plate and thereby locking the second end section with respect to the suspension plate is formed. In particular, the second locking loop is configured to receive the second end section, such that the second end section extends through the second locking loop.
In certain embodiments, the suture element further extends through a sixth through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate with the second end ahead, wherein particularly the second end section of the suture element further extends through the second locking loop for clamping the second end section of the suture element to the front side of the suspension plate by means of the second locking loop with a locking force.
In certain embodiments, the second end section comprises an adjustable second suspension section between the suspension plate and the connecting section, wherein the second suspension section is configured to be shortened by pulling on the second end section of the suture element, particularly the second end of the suture element. In particular, the second end section protrudes out of the second locking loop.
In certain embodiments, the suspension plate is connected to or integrally formed with a screw or an anchor configured to be inserted into a bone. Thereby, the suspension plate can be tightly fixed to a bone where required, while being able to easily connect soft tissue to the suspension plate, and particularly adjust the length of the first and/or second suspension section.
In certain embodiments, the suture element comprises a needle attached to the suture element, particularly to the first end or the second end. Using the needle, the connecting section may be connected to an implant without further tools.
In certain embodiments, the suture element is braided from an ultra-high molecular weight polyethylene. In certain embodiments, the suture element is co-braided from an ultra-high molecular weight polyethylene and polypropylene, polyester or polyamide.
In certain embodiments, the suspension plate, particularly the front side and/or the rear side of the suspension plate, has a surface roughness of at least 0.6 μm.
In certain embodiments, the suture element comprises or consists of a plurality of fibers (particularly braided or twisted fibers), wherein the fibers are separated from each other in the connecting section, particularly wherein each of the separated fibers comprises a fiber end or a fiber loop positioned at the second end of the suture element. Such fibers can be advantageously connected to a medical textile or an implant by felting (also termed “needle felting”), i.e., repeatedly advancing a needle comprising at least one barb through the connecting section and the medical textile or implant.
The fibers are separated from each other in the connecting section. That means that, as opposed to the remaining suture element, the fibers in the connecting section are not connected, particularly braided (i.e. entangled), twisted, knitted or felted, with neighboring fibers. Of course, the fibers may still contact neighboring fibers in the connecting section.
By means of the separated fibers of the connecting section, which are spread over a larger area than in the main section of the medical implant, pressure can be advantageously distributed over a larger area when the connecting section is connected to soft tissue thereby improving the stability of the mechanical connection. At the same time, the good tensile strength of the suspension device is retained due to the braided or twisted suture element.
In certain embodiments, the connecting section forms a fan-like structure extending in a plane parallel to an extension direction of the suture element. This advantageously increases the area of the connecting section, thereby improving the connection strength.
A second aspect of the invention relates to a medical implant comprising the implantable suspension device according to the first aspect and a medical textile, particularly comprising or consisting of a felt material, wherein the connecting section of the suture element is connected to the medical textile, and wherein the medical textile is configured to be connected to the elongated flexible implant. Such a medical textile advantageously improves the connection of the suture element to the implant.
In certain embodiments, the connecting section is connected to the medical textile by stitches.
In certain embodiments, the suture element comprises or consists of a plurality of fibers, wherein the fibers are separated from each other in the connecting section, and wherein the separated fibers of the connecting section extend into and/or through the medical textile to connect the suture element of the implantable suspension device to the medical textile. This type of connection can be particularly achieved by advancing a needle having at least one barb repeatedly through the connecting section and the medical textile, resulting in a very strong connection using a fast and simple procedure.
In certain embodiments, the medical textile extends along a plane.
In certain embodiments, the medical textile comprises a flat shape.
In certain embodiments, the connecting section of the suture element forms a fan-like structure extending in a plane parallel to an extension direction of the suture element, wherein the suture element is connected to the medical textile, such that the first medical implant extends from the medical textile parallel to the plane of the medical textile. This further increases the area of the connecting section, contributing to the connection strength.
In certain embodiments, the medical textile comprises a tubular shape, wherein the medical textile comprises an inner surface configured to be connected to the elongated flexible implant. This allows an especially tight connection to implants having an elongated shape, such as tendons.
A third aspect of the invention relates to an assembly device for assembling the implantable suspension device according to the first aspect of the invention, wherein the assembly device comprises a holder configured to hold the suspension plate of the implantable suspension device and a guiding rope (or guiding wire) configured to be moved together with the suture element of the implantable suspension device relative to the holder, resulting in the suture element engaging with the suspension plate to assemble the implantable suspension device.
Therein, the term guiding rope refers to an elongated flexible member from any suitable material configured to guide the suture element for engagement with the suspension plate.
In certain embodiments, the guiding rope extends through at least one through-hole of the plurality of through-holes of the suspension plate held by the holder, such that the guiding rope can be moved through the at least one through-hole together with the suture element, resulting in the suture element engaging with the suspension plate.
In certain embodiments, the assembly device comprises a first pin and a second pin, wherein the holder is configured to hold the suspension plate between the first pin and the second pin, and wherein the assembly device is configured such that the guiding rope can be moved (or slid) around the first pin and the second pin together with the suture element resulting in the suture element engaging with the suspension plate.
The holder is configured to hold the suspension plate between the first pin and the second pin. In other words, the holder is configured to hold the suspension plate in a position intersecting an imaginary line between the first pin and the second pin. Therein, the suspension plate is particularly spaced apart from the first pin and the second pin.
In the context of the present specification, the expression “move around a pin” means that the guiding rope or suture element is moved while it is in contact with at least a part of the circumference of the pin, wherein particularly the guiding rope or suture element extends along an angled path around the pin. In other words, the guiding rope or suture element does not have to be wound completely around the circumference (360°) to be “moved around the pin”.
The guiding rope is particularly in contact with the first pin and the second pin, while it is moved around the first and the second pin.
The first pin and the second pin ensure that the guiding rope and the suture element slide through the through-holes of the suspension plate without entangling.
In certain embodiments, the holder is configured to hold the suspension plate between the first pin and the second pin such that the first pin faces the front side of the suspension plate and the second pin faces the rear side of the suspension plate.
In certain embodiments, the guiding rope extends successively through the first through-hole from the rear side to the front side of the suspension plate, around the first pin, through the second through-hole from the front side to the rear side of the suspension plate, around the second pin and through the third through-hole from the rear side to the front side of the suspension plate.
In certain embodiments, the guiding rope extends successively through the fourth through-hole from the rear side to the front side of the suspension plate, around the first pin, through the fifth through-hole from the front side to the rear side of the suspension plate, around the second pin and through the sixth through-hole from the rear side to the front side of the suspension plate.
In certain embodiments, the guiding rope forms a loop configured to enlace the suture element, such that the loop can be moved together with the suture element relative to the holder resulting in the suture element engaging with the suspension plate.
Therein, the loop enlacing the suture element means that the suture element extends through the loop.
In certain embodiments, the guiding rope comprises an inner volume extending between a first end and a second end of the guiding rope, wherein the guiding rope is configured to receive the suture element in the inner volume, such that the guiding rope can be moved together with the suture element disposed in the inner volume relative to the holder resulting in the suture element engaging with the suspension plate.
In certain embodiments, the guiding rope forms a funnel at the first end, wherein the funnel defines an opening for receiving the suture element in the inner volume.
In certain embodiments, the funnel is characterized by an expanded state and a collapsed state, wherein the opening has a first diameter in the expanded state and a second diameter in the collapsed state, wherein the first diameter is larger than the second diameter.
In certain embodiments, the assembly device comprises a holding part comprising the holder and a casing part comprising a wall configured to encase the holder when the holding part and the casing part are assembled.
In certain embodiments, the wall comprises an opening for inserting and/or extracting the suture element by means of the guiding rope, particularly the first end and/or the second end of the suture element.
In certain embodiments, the holding part comprises the first pin and the second pin.
In certain embodiments, the casing part comprises a first hole configured to receive the first pin of the holding part and a second hole configured to receive the second pin of the holding part to assemble the holding part and the casing part.
In certain embodiments, the assembly device comprises a tool for implanting the implantable suspension device at a desired location in a human or animal body. For example, such a tool may be used to place the suspension plate at the desired location adjacent to a bone tunnel and adjust the length of the first and/or second suspension section to position the implant in the bone tunnel.
In certain embodiments, the tool comprises a guide bar extending along a first axis configured to guide the guiding rope and/or the suture element, wherein the guide bar comprises a slot extending along the first axis for receiving the guiding rope and/or the suture element, particularly the first end or the second end of the suture element.
In certain embodiments, the guide bar comprises a recess or a hole for receiving the first pin or the second pin.
In certain embodiments, the guide bar comprises a tip comprising a notch for receiving the suspension plate.
In certain embodiments, the tool comprises a handle for holding the tool, wherein the handle is connected to the guide bar.
In certain embodiments, the handle comprises a groove for inserting the guiding rope and/or the suture element when at least a part of the guiding rope and/or the suture element is arranged in the slot.
In certain embodiments, the tool is separable into a handle part comprising the handle and a tip part comprising at least a part of the guiding bar.
The separable tip part may be preassembled with the positioning part holding the suspension plate and the guiding rope in place and provided as a disposable unit (which is particularly pre-sterilized and packaged in a sterile environment), while the handle part can be a re-usable unit.
In certain embodiments, the handle part and the tip part comprise an inner thread and an outer thread corresponding to the inner thread. In certain embodiments, the handle part comprises an inner thread and the tip part comprises an outer thread corresponding to the inner thread. In certain embodiments, the tip part comprises an inner thread and the handle part comprises an outer thread corresponding to the inner thread. An inner thread corresponding to an outer thread means that the part comprising the outer thread can be connected to the part comprising the inner thread by screwing the outer thread into the inner thread.
In certain embodiments, the assembly device is configured to clamp the suture element in the slot.
In certain embodiments, the assembly device comprises an actuating element that can be actuated to clamp the suture element in the slot.
In certain embodiments, the assembly device comprises a self-locking clamp for clamping the suture element when the suture element is received in the slot, wherein particularly the assembly device comprises an actuating element configured to unclamp the suture element.
In certain embodiments, the assembly device comprises a first part comprising a fixing element for attaching the guiding rope, particularly a first end of the guiding rope, to the first part, and a second part comprising the holder, wherein the second part is rotatable about a rotation axis relative to the first part, such that the guiding rope can be moved together with the suture element relative to the holder when the second part is rotated relative to the first part, resulting in the suture element engaging with the suspension plate.
In certain embodiments, the first part further comprises a seventh pin for guiding the guiding rope towards the fixing element.
By rotating the second part relative to the first part, the guiding rope can be moved in a space-saving manner to achieve engagement of the suture element with the suspension plate.
In certain embodiments, the first pin and the second pin are comprised in, particularly arranged on, the second part.
In certain embodiments, the assembly device further comprises a third pin and a fourth pin comprised in, particularly arranged on, the second part.
In certain embodiments, the third pin is arranged between the first pin and the second pin along a periphery around the holder.
In certain embodiments, the fourth pin is arranged between the first pin and the second pin and opposite the third pin along the periphery.
In certain embodiments, the guiding rope is arrangeable along the periphery around the first pin, the second pin, the third pin and/or the fourth pin when the second part is rotated relative to the first part.
In certain embodiments, the assembly device further comprises a fifth pin for guiding the guiding rope and/or the suture element from the holder towards the fixing element.
In certain embodiments, the fifth pin is arranged on the second part adjacent to the first pin radially outward from the first pin with respect to the rotation axis.
In certain embodiments, the assembly device further comprises a sixth pin, particularly arranged on the second part.
In certain embodiments, the fifth pin and the sixth pin are arranged such that the guiding rope and/or the suture element can be guided from the holder towards the fixing element between the fifth pin and the sixth pin when the second part is rotated relative to the first part.
In certain embodiments, the assembly device comprises a lid part comprising a first handle, wherein the lid part is configured to be coupled to the second part, wherein the first part comprises a second handle, such that the second part can be rotated relative to the first part by moving the first handle relative to the second handle.
In certain embodiments, the lid part comprises at least a first hole and a second hole, wherein the first hole and the second hole are each configured to receive one of the first pin, the second pin, the third pin, the fourth pin, the fifth pin or the sixth pin to couple the lid part to the second part. In certain embodiments, the lid part comprises a first hole, wherein the first hole is configured to receive the first pin, the second pin, the third pin, the fourth pin, the fifth pin or the sixth pin to couple the lid part to the second part. In certain embodiments, the lid part comprises a second hole, wherein the second hole is configured to receive the first pin, the second pin, the third pin, the fourth pin, the fifth pin or the sixth pin to couple the lid part to the second part.
A fourth aspect of the invention relates to a method for assembling an implantable suspension device, particularly according to the first aspect of the invention, wherein a suspension plate and a suture element are provided, wherein the suture element is engaged with or connected to the suspension plate, such that a first end section of the suture element extends from the suspension plate to a first end of the suture element and a second end section of the suture element extends from the suspension plate to a second end of the suture element.
In certain embodiments, a connecting section comprised in the second end section is connected, particularly stitched, to an elongated flexible implant or tissue. In particular, connecting the connecting section to the implant or tissue is performed ex vivo. Connection to the implant may be performed prior to or after assembling the suture element with the suspension plate.
In certain embodiments, a first locking loop is formed from the suture element, wherein the first locking loop presses the first end section of the suture element against the suspension plate, thereby locking the first end section with respect to the suspension plate.
In certain embodiments, an adjustable first suspension section of the suture element between the suspension plate and the connecting section is shortened by pulling on the first end section of the suture element, wherein particularly the first end section protrudes out of the first locking loop.
In certain embodiments, the suture element is inserted into a plurality of through-holes of the suspension plate, wherein the through-holes extend from a front side of the suspension plate to a rear side of the suspension plate facing away from the front side. In certain embodiments, the suture element is inserted into at least three through-holes, wherein the through-holes extend from a front side of the suspension plate to a rear side of the suspension plate facing away from the front side. In certain embodiments, the suture element is inserted into 3, 4 or 6 through-holes, wherein the through-holes extend from a front side of the suspension plate to a rear side of the suspension plate facing away from the front side.
In certain embodiments, the suture element is inserted into a first-through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate with the first end ahead, particularly such that the adjustable first suspension section is formed on the rear side of the suspension plate.
In certain embodiments, the suture element is further inserted into a second through-hole of the plurality of through-holes from the front side to the rear side of the suspension plate with the first end ahead, particularly such that the first locking loop is formed on the front side of the suspension plate.
In certain embodiments, the suture element is further inserted into a third through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate with the first end ahead. In particular, the first end section of the suture element is further inserted into the first locking loop for clamping the first end section to the front side of the suspension plate by means of the first locking loop with a locking force.
In certain embodiments, the suture element is further inserted into a fourth through-hole of the plurality of through-holes from the front side to the rear side of the suspension plate with the first end ahead.
In certain embodiments, the suture element is further inserted into a fourth through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate with the second end ahead, particularly such that the suture element forms a second suspension section between the connecting section and the suspension plate.
In certain embodiments, the suture element is further inserted into a fifth through-hole of the plurality of through-holes from the front side to the rear side of the suspension plate with the second end ahead, particularly such that a second locking loop for pressing the second end section against the suspension plate and thereby locking the second end section with respect to the suspension plate is formed.
In certain embodiments, the suture element is further inserted into a sixth through-hole of the plurality of through-holes from the rear side to the front side of the suspension plate with the second end ahead. In particular, the second end section of the suture element is further inserted into the second locking loop for clamping the second end section of the suture element to the front side of the suspension plate by means of the second locking loop with a locking force.
In certain embodiments, an adjustable second suspension section of the suture element between the connecting section and the suspension plate is shortened by pulling on the second end section, particularly the second end, of the suture element, wherein particularly the second end section protrudes out of the second locking loop.
In certain embodiments, the connecting section is connected to the elongated flexible implant or tissue by means of a needle attached to the suture element, particularly to the first end or the second end.
In certain embodiments, a guiding rope is moved together with the suture element resulting in the suture element engaging with the suspension plate to assemble the implantable suspension device.
In certain embodiments, the guiding rope is inserted into at least one through-hole of the plurality of through-holes of the suspension plate, wherein the guiding rope is subsequently moved through the at least one through-hole together with the suture element, resulting in the suture element engaging with the suspension plate.
In certain embodiments, the guiding rope is moved around a first pin and a second pin together with the suture element during engagement of the suture element with the suspension plate, wherein particularly the suspension plate is arranged between the first pin and the second pin, such that the first pin faces the front side of the suspension plate and the second pin faces the rear side of the suspension plate.
In certain embodiments, the guiding rope is successively inserted into the first through-hole from the rear side to the front side of the suspension plate, around the first pin, into the second through-hole from the front side to the rear side of the suspension plate, around the second pin and into the third through-hole from the rear side to the front side of the suspension plate.
In certain embodiments, the guiding rope is successively inserted into the fourth through-hole from the rear side to the front side of the suspension plate, around the first pin, into the fifth through-hole from the front side to the rear side of the suspension plate, around the second pin and into the sixth through-hole from the rear side to the front side of the suspension plate.
In certain embodiments, the guiding rope forms a loop enlacing the suture element, wherein the loop is moved together with the suture element resulting in the suture element engaging with the suspension plate.
In certain embodiments, the suture element is received in an inner volume of the guiding rope extending between a first end and a second end of the guiding rope, wherein the guiding rope is moved together with the suture element disposed in the inner volume resulting in the suture element engaging with the suspension plate.
In certain embodiments, the suture element is received in the inner volume through an opening of a funnel formed by the guiding rope at the first end of the guiding rope.
In certain embodiments, the funnel is collapsed from an expanded state to a collapsed state during engagement of the suture element with the suspension plate, wherein the opening has a first diameter in the expanded state and a second diameter in the collapsed state, wherein the first diameter is larger than the second diameter.
In certain embodiments, after assembly of the implantable suspension device, the implantable suspension device is mounted, particularly automatically, on a tool for implanting the implantable suspension device into a human or animal body.
In certain embodiments, the guiding rope, particularly a first end of the guiding rope, is attached to a fixing element, wherein the fixing element is moved along a periphery around the suspension plate, such that the guiding rope together with the suture element is moved relative to the suspension plate resulting in the suture element engaging with the suspension plate.
In certain embodiments, the guiding rope is moved along the periphery around the first pin and the second pin.
In certain embodiments, the guiding rope is moved along the periphery around the first pin, the second pin, a third pin and a fourth pin, the third pin being arranged between the first pin and the second pin along the periphery and the fourth pin being arranged between the first pin and the second pin and opposite the third pin along the periphery.
In certain embodiments, the guiding rope is further moved around a fifth pin, wherein the fifth pin guides the guiding rope and/or the suture element towards the fixing element, wherein the fifth pin is arranged adjacent to the first pin.
In certain embodiments, the guiding rope is further moved around a sixth pin, wherein the guiding rope and/or the suture element is guided towards the fixing element between the fifth pin and the sixth pin.
A fifth aspect of the invention relates to a method for assembling a medical implant, particularly according to the second aspect of the invention, comprising the steps of providing a suture element comprising a connecting section, providing a medical textile, particularly comprising or consisting of a felt material, connecting the connecting section of the suture element to the medical textile, providing a suspension plate, and engaging or assembling the suture element with the suspension plate, particularly by the method according to the fourth aspect of the invention.
In certain embodiments, the connecting section of the suture element is connected to the medical textile by stitching.
In certain embodiments, the suture element comprises or consists of a plurality of fibers, wherein the fibers are separated from each other in the connecting section, and wherein the separated fibers of the connecting section are advanced into and/or through the medical textile to connect the suture element of the implantable suspension device to the medical textile.
In certain embodiments, the suture element is connected to the medical textile by repeatedly advancing a needle comprising at least one barb through the connecting section and the medical textile to advance the separated fibers of the connecting section into and/or through the medical textile.
In certain embodiments, the medical textile and/or the suture element is connected to an elongated flexible implant, particularly outside of a human or animal body.
In certain embodiments, the medical textile and/or the suture element is connected to the elongated flexible implant, particularly outside of the human or animal body, after connecting the connecting section of the suture element to the medical textile.
In certain embodiments, the medical textile and/or the suture element is connected to the elongated flexible implant, particularly outside of the human or animal body, prior to engaging or assembling the suture element with the suspension plate.
In certain embodiments, the suture element is stitched to the implant, particularly outside of the human or animal body.
In certain embodiments, the medical textile is connected to the implant by repeatedly advancing a needle comprising at least one barb through the medical textile and the elongated flexible implant, particularly outside of the human or animal body.
In certain embodiments, the suture element is connected to the implant by repeatedly advancing a needle comprising at least one barb through the connecting section of the suture element and the elongated flexible implant, particularly outside of the human or animal body.
In certain embodiments, the medical textile is at least partially wrapped around the implant prior to connecting the medical textile to the elongated flexible implant, particularly wherein the medical textile is wrapped around the elongated flexible implant, such that the medical textile assumes a tubular shape, wherein the elongated flexible implant is connected to an inner surface of the medical textile.
Further features and advantages of the invention shall be described by means of detailed descriptions of embodiments with reference to the Figures, wherein
As shown in
The first end 201a is then advanced through a first through-hole 11 of the suspension plate 100 from a rear side 100b (not shown in
Subsequently, the first end 201a of the suture element 200 is inserted into a second through hole 12 of the suspension plate 100 from the front side 108 to the rear side 100 B (
In the next step which is shown in
The final assembly with a tightened first locking loop 41 pressing the first end section 201 against the front side 100a of the suspension plate 100 is shown in
Furthermore, a first suspension section 231 is formed between the rear side 100b of the suspension plate 100 and the connecting section 240 stitched to the implant G (
As illustrated in
In particular, in order to achieve a friction coefficient which is sufficient to provide a self-locking mechanism, the suture element 200 may be braided from an ultra-high molecular weight polyethylene or co-braided from an ultra-high molecular weight polyethylene and polypropylene, polyester or polyamide, and the front side 100a and/or the rear side 100b of the suspension plate may have a surface roughness of at least 0.6 μm. For example, the suture element 200 may have a diameter of about 0.5 to 0.7 mm, and the first through-hole 11, the second through-hole 12 and/or the third through-hole may have a diameter of about 1.1 mm.
After adjusting the length of the first suspension section 231, the first end section 201 may be shortened, e.g., by cutting, resulting in the configuration shown in
To form the assembly shown in
Subsequently, the second end section 202 is advanced through a fifth through-hole 15 from the front side 100a to the rear side 100b of the suspension plate 100 with the second end 202a ahead, thereby forming a second locking loop 42 on the front side 100a of the suspension plate 100 (
The second end section 202 is then inserted into a sixth through-hole 16 from the rear side 100b to the front side 100a of the suspension plate 100 with the second end 202a ahead and advanced through the second locking loop 42 on the front side 100a of the suspension plate 100 (
Thereby, a first suspension section 231 of the suture element 200 protruding from the rear side 100b of the suspension plate 200 is formed between the first through-hole 11 and the implant G, and a second suspension section 232 of the suture element 200 protruding from the rear side 100b of the suspension plate 200 is formed between the implant G and the fourth through-hole 14.
In the final assembly depicted in
The length of the first and second suspension strand 231, 232 can then be adjusted independently of each other by pulling on the first end section 201 or the second end section 202, respectively (see arrow in
The self-locking mechanism of the first locking loop 41 and the second locking loop 42 functions in the same way as described above for the embodiment shown in
As depicted in
The first free end 201a of the suture element 200 is inserted into the first through-hole 11 of the suspension plate 100 from the rear side 100b to the front side 100a (
Thus, the first suspension section 231 extending between the implant G and the first through-hole 11 and the first end section 201 protruding from the fourth through-hole 14 are both arranged on the rear side 100b of the suspension plate 100, which allows to adjust the length of the first suspension section 231 from the rear side 100b by pulling on the first end section 201. This is advantageous for some applications of the implantable suspension device 1, where the rear side 100b of the suspension plate 100 can be more easily accessed than the front side 100a of the suspension plate 100.
The self-locking mechanism of the first locking loop 41 according to
The screw 3 shown in
The suspension plate 100 integrally formed with the screw 3 comprises a first through-hole 11, a second through-hole 12, a third through-hole 13 and a fourth through-hole 14, each extending between the front side 100a and the rear side 100b of the suspension plate 100. To access the front side 100a of the suspension plate 100, a lateral opening 3c is provided (
The suspension plate 100 integrally formed with the anchor 4 comprises a first through-hole 11, a second through-hole 12, a third through-hole 13 and a fourth through-hole 14, each extending between the front side 100a and the rear side 100b of the suspension plate 100. To access the front side 100a of the suspension plate 100, a lateral opening 4c is provided (
As indicated in
A needle 250 is attached to the second end 202a of the suture element 200 as shown in
For example, the implantable suspension device 1 according to
The guiding rope 300 extends from a first end 301 successively through the third through-hole 13 or sixth through-hole 16, the second through-hole 12 or fifth through-hole 15, and the first through-hole 11 or fourth through-hole 14, forms a loop 303 and extends back through the first through-hole 11 or fourth through-hole 14, the second through-hole 12 or fifth through-hole 15 and the third through-hole 13 or the sixth through-hole 16 towards a second end 302. An additional first loop L1 or bend is formed between the first or fourth through-hole 11, 14 and the second or fifth through-hole 12, 15 and a further second loop L2 or bend is formed between the second or fifth through-hole 12, 15 and the third or sixth through-hole 13. 16.
When the suture element 200 is inserted into the loop 303 of the guiding rope 300 as shown in
The guiding rope 300 according to
Hereafter, an assembly device 2 for assembling the implantable suspension device 1 according to the present invention is described with reference to
The holding part 21 comprises a holder 400 formed as a slot for insertion of the suspension plate 100, a first pin P1 and a second pin P2, wherein the first pin P1 and the second pin P2 are arranged on opposite sides of the holder 400. The holder 400 is arranged between the pins P1, P2 such that the first pin P1 faces the front side 100a of the suspension plate 100 and the second pin P2 faces the rear side 100b of the suspension plate 100. In
As shown in
In
The casing part 22 comprises a first hole 22a and a second hole 22b for receiving the first pin P1 and the second pin P2 of the holding part 21, respectively, and connect the casing part 22 to the holding part 21, and a wall 22c encasing the holding part 21 and comprising an opening 22d for receiving the guide bar 23 (see also
By pulling the guiding rope 300 through the assembly device 2 along the slot 23a of the guide bar 23 and through the groove 24b of the handle 24a, the suture element 200 may be assembled and engaged with the suspension plate 100 held by the holding part 21, resulting in the first end 201a of the suture element 200 protruding from the groove 24b of the handle 24a and the second end 202a of the suture element 200 protruding from the opening 22d of the casing part 22 opposite the tip of the guide bar 23, resulting in the setup shown in
As depicted in
The second end 202a of the suture element 200 may then be attached to an implant G (see
The tool 5 may further comprise an actuating element 28 that can be actuated to clamp the suture element 200 in the slot 23a of the guide bar 23 or release a clamping mechanism.
As shown in
As depicted in
The first part 30 comprises a fixing element 31 for fixing the guiding rope 300 to the first part 30. In the embodiment shown in
As shown in
The first part 30 further comprises a second handle 32 and a further handle 33 opposite the second handle 32.
When the lid part 60 is coupled to the second part 50 and the first handle 61 of the lid part 60 is moved relative to the second handle 32 of the first part 30, the second part 50 is rotated about the rotation axis R with respect to the first part 30. Thereby, the fixing element 31 with the ends of the guiding rope 300 attached revolves around the second part 50 and the loop 303 of the guiding rope 300 is drawn around the pins P1, P2 and through the through-holes 11, 12, 13 of the suspension plate 100 in the holder 400, resulting in an engagement of the suture element 200 with the suspension plate 100 similar to the procedure shown in
Due to the rotary motion of the guiding rope 300, the assembly advantageously requires less space than in case of a linear motion. In addition, uncontrollable movements during the mechanism due to different forces acting during different stages of assembly, are avoided by the rotary assembly procedure. Furthermore, by using sufficiently long handles, the force applied to the handles can be amplified (e.g. by a factor of about 3), resulting in less force applied by the user. The pins P1, P2, P3, P4 ensure that the guiding rope 300 and the suture element 200 do not entangle and the pins P5, P6, P7 serve to guide the guiding rope towards the fixing element 31.
As shown in
Next, as illustrated in
Subsequently, the medical textile 500, which is now attached to the suture element 200, is connected to a flexible implant G, e.g., a soft tissue such as a tendon (
Finally,
During a typical surgical procedure, the bone tunnel 601 is first introduced into the bone 600 using a surgical drill. Subsequently, the suspension plate 100 with the attached suture element 200 is introduced into the first segment 602 of the bone tunnel 601 and then moved through the second segment 603 of the bone tunnel 601 to the outside of the bone 600. The suspension plate 100 is then flipped to be arranged perpendicular to the bone tunnel 601. Next, the first suspension section 231 is shortened by pulling on the first end section 201, which results in the medical textile 500 with the attached flexible implant G being pulled into the first segment 602 of the bone tunnel 601. After tightening the first suspension section 231, the first end section 201 of this is suture element 200 may be cut, resulting in the configuration shown in
As shown in
Finally, as illustrated in
The assembled medical implant 6 is then inserted into a bone tunnel 601 as described above for the example shown in
Number | Date | Country | Kind |
---|---|---|---|
19192320.0 | Aug 2019 | EP | regional |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/EP2020/073191 | 8/19/2020 | WO |