WO2023088517A1 - Zweiteiliger marknagel sowie nagelkern hierfür - Google Patents
Zweiteiliger marknagel sowie nagelkern hierfür Download PDFInfo
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- WO2023088517A1 WO2023088517A1 PCT/DE2022/100854 DE2022100854W WO2023088517A1 WO 2023088517 A1 WO2023088517 A1 WO 2023088517A1 DE 2022100854 W DE2022100854 W DE 2022100854W WO 2023088517 A1 WO2023088517 A1 WO 2023088517A1
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- WIPO (PCT)
- Prior art keywords
- nail
- core
- intramedullary nail
- spring element
- intramedullary
- Prior art date
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- 210000000988 bone and bone Anatomy 0.000 claims abstract description 35
- 238000004804 winding Methods 0.000 claims abstract description 25
- 230000006641 stabilisation Effects 0.000 claims abstract description 10
- 241000587161 Gomphocarpus Species 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 19
- 230000002040 relaxant effect Effects 0.000 claims description 14
- 238000011105 stabilization Methods 0.000 claims description 9
- 239000011343 solid material Substances 0.000 claims description 4
- 238000011161 development Methods 0.000 description 14
- 230000018109 developmental process Effects 0.000 description 14
- 208000027418 Wounds and injury Diseases 0.000 description 12
- 206010052428 Wound Diseases 0.000 description 11
- 238000002513 implantation Methods 0.000 description 10
- 238000004873 anchoring Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 210000003414 extremity Anatomy 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 208000002847 Surgical Wound Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7208—Flexible pins, e.g. ENDER pins
Definitions
- the invention relates to a two-part intramedullary nail for internal stabilization and/or fixation of an elongated hollow body, in particular a bone, and a nail core for this.
- Simpler intramedullary nails for locking nailing are known, but their installation during an operation can only be checked by means of intraoperative X-ray imaging, which is a burden not only for the patient but especially for the surgical staff due to the duration. Furthermore, such simple intramedullary nails must be secured in the bone by means of transverse screws, for which purpose complex aiming devices are required, particularly in the case of long femurs, but also in the case of upper arm and lower leg bones, in order to be able to precisely set such transverse screws through them with the least possible injury to the skin.
- These surgical wounds which are additionally introduced into an extremity, have to be treated in a complex manner after an operation, but also after surgical removal of the transverse screws, which entails additional stress for a patient.
- a nail system for intramedullary osteosynthesis in the case of shaft fractures of all kinds, which has a tubular outer body with openings from which hooks extend outwards, which can be pivoted outwards by actuating an inner body, whereby the hooks on the Can create inner wall of a tubular bone.
- This nail system is complex and has many components, but due to the principle it can only produce point contacts with the inner surface of a long bone, and this only in a narrow circumferential area that is identical over the length.
- DE 38 35 682 A1 discloses a device for stabilizing fractures of long bones and joints, which has helical springs wound into one another with one or more threads as stabilizing elements, some of which are wound around a core in the form of an elastically deformable wire or a bundle of elastically deformable wires.
- a helical spring may be provided at the ends with bone attachment means.
- WO 2006/066536 A1 discloses an intramedullary medullary nail, in particular for the closed repositioning of a fracture of a long bone by inserting it into a bore in its medullary cavity, which has a comparatively simple structure and can be used easily, quickly and safely with only a small amount of intraoperative X-ray radiation without having to intervene in intact areas of a limb.
- the intramedullary nail has a nail core, at the front area of which a head piece is provided, on which the beginning of a band is fixed, which is wound around the nail core and which is fixed at the end in the rear area around the nail core in a rotationally lockable manner, and which when rotated counter to its winding direction, the radial contour of the intramedullary nail expands.
- Another intramedullary nail is known from WO 2015/117996 A1, namely an arrangement for internal stabilization and/or fixation of an elongated hollow body pers, in particular bones such as long bones or a prosthesis, with a stabilizing element with a helically elongated first element whose proximal end is connected to a first fastening element, and from whose distal end a second element emanates, which in the region of the first fastening element with is connected to a second fastening element, the first element and the second element merging into one another preferably without a connection as sections of the stabilizing element, the first fastening element forming the first fastening element being non-rotatable relative to the second fastening element, the outer fastening element forming the first fastening element being clamped in place and the inner fastening element forming the second fastening element being fixed.
- this arrangement with two superimposed coiled elements no internal nail core is provided.
- Such medullary nails without an inner nail core or core are very pliable and flexible and can therefore be easily implanted. Insertion through a narrow kink into a medullary canal also poses few problems.
- the diameter of these intramedullary nails can be significantly reduced by tightening the fastening elements without a nail core getting in the way.
- intramedullary nails only have a low flexural rigidity and only limited lateral and axial stability.
- the object of the present invention is to overcome the disadvantages arising from the prior art.
- the object is to specify an intramedullary nail which, on the one hand, can be implanted without any problems even in cramped or complicated spaces, and, on the other hand, after implantation has high stability against bending and lateral as well as axial stress.
- a solution to the above-mentioned problem is provided by a device having the features of claim 1.
- An intramedullary nail according to the invention is thus specified.
- a nail core according to the invention for such an intramedullary nail is the subject of claim 31.
- Advantageous refinements and developments of the invention are the subject matter of the respective subordinate claims.
- a medullary nail is proposed for internal stabilization and/or fixation of an elongated hollow body, in particular a bone
- the medullary nail has two separate parts, namely a) a covering element extending in a longitudinal direction with a proximal end, a distal end, and with a substantially cylindrical interior space, wherein an outer contour of the sleeve element, viewed perpendicularly to the longitudinal direction, has an elongate spring element which, starting from the proximal end and in relation to the longitudinal direction, is wound in a helical course, and wherein the extension of the outer contour of the sleeve element is defined by a Tensioning of the elongate spring element in the winding direction can be reduced and increased by relaxing the elongate spring element against the winding direction, and b) a substantially rod-shaped nail core which can be inserted into the interior through the proximal end of the sleeve element.
- the separate core of the nail can be subsequently introduced into the already implanted cover element, and can ensure significantly increased flexural stability as well as lateral and axial stability of the entire intramedullary nail.
- implantation through an incision point, particularly through a tight kink, is not impeded by a stiff core of the nail.
- the nail core is an independent part of the entire intramedullary nail and is not connected to the covering element until it is implanted. This makes an implantation process particularly flexible and adaptable to a wide variety of spatial conditions.
- the covering element can be compressed particularly tightly without an included nail core, namely by tensioning the spring element, and can therefore be introduced into a medullary canal in an absolutely flexible and flexible manner. Then the implanted cover element can act as a channel for the nail core to be inserted thereafter.
- the core of the nail can slide off particularly well on the inner wall of the covering element and can therefore be inserted more easily into the hollow body or bone.
- the diameter and length of the core of the nail can be selected in a ratio that allows sufficient flexibility to guide the core through narrow radii and also provides sufficient stability for the entire intramedullary nail.
- the covering element essentially has the shape of a hollow cylinder. In this way, the covering element can be easily inserted into a hollow body to be stabilized, and at the same time a defined interior space for the nail core is formed.
- the outer contour of the covering element is preferably essentially formed by the coiled, elongate spring element.
- the spring element is preferably wound in the form of a three-dimensional spiral, and in particular in the form of a cylindrical spiral.
- the spring element is elastically deformable.
- the spring element can preferably form a three-dimensional spiral spring, and in particular a helical spring.
- the spring element is particularly preferably a wire or a band.
- an embodiment of the intramedullary nail has proven to be advantageous in which the covering element can be clamped by expanding its outer contour relative to the inner wall of an elongate hollow body to be stabilized.
- the covering element can be firmly anchored in the bone and at the same time stabilize and possibly also align the fracture.
- the covering element braced against the inner wall provides a maximally large interior space for the core of the nail.
- the intramedullary nail can preferably have a covering element with two elongated spring elements arranged one above the other, which are each wound in a helical course in relation to the longitudinal direction of the covering element.
- the two spring elements arranged one above the other can preferably form a three-dimensional double spiral, in particular a double helix.
- Said two spring elements arranged one above the other can be wound in opposite directions or in the same direction.
- An embodiment of the intramedullary nail is particularly preferred in which the two spring elements arranged one above the other are wound in opposite directions and consist of a continuous element which transitions from a first spring element into a second spring element at the distal end.
- the core of the nail can preferably be inserted from the outside into a covering element which, seen by itself, has already been inserted into a hollow body to be stabilized, or which, seen by itself, has already been implanted in a bone.
- a covering element which, seen by itself, has already been inserted into a hollow body to be stabilized, or which, seen by itself, has already been implanted in a bone.
- the nail core is elastically deformable, in particular elastically bendable.
- the nail core can be inserted into a covering element which has a kink or a bend.
- the intramedullary nail is elastically deformable.
- the nail core can preferably consist of solid material.
- the nail core preferably has a round, in particular circular, cross section.
- the nail core can be easily inserted and advanced into the covering element, at the same time the nail core can have a similar or the same flexural rigidity with respect to all directions perpendicular to the longitudinal direction.
- the nail core can preferably have a Herzog curvature.
- An embodiment is particularly preferred in which the proximal end of the covering element has a substantially axial opening for inserting the nail core.
- the proximal end of the sheath element preferably has a nail head.
- a nail head can in particular provide anchoring for the beginning or the end of a spring element.
- the nail head can preferably have a sleeve or bushing which can be rotated about the longitudinal axis and which is connected to the beginning or the end of a spring element. By rotating the sleeve or bushing about the longitudinal axis, the relevant spring element can then be tensioned or released.
- the proximal end of the covering element in particular a nail head
- the proximal end of the covering element can have an end cap on the side facing away from the covering element.
- a nail core introduced into the covering element can be covered and further secured.
- the length of the core of the nail corresponds to the axial extent of the coiled spring element plus the length of the head of the nail.
- the distal end of the nail core preferably has a tip which is rounded. In this way, the nail core can be inserted into the covering element and passed through it in a particularly simple manner.
- proximal end of the nail core can be fixed or anchored in the proximal end of the covering element, in particular in a nail head.
- the proximal end of the nail core is widened compared to any other radial extension of the nail core.
- the widened end can be used in particular as a stop to anchor the proximal end in the sleeve element or in a nail head. In this way, the core of the nail cannot migrate through the covering element. Otherwise, in the worst case scenario, the core of the nail could permanently work its way through the bone and damage an adjacent joint.
- a widening of the nail core can preferably be realized by the process of reshaping, pushing open or squeezing, or by a thread.
- a diameter of the covering element can be reduced by tensioning a spring element down to a diameter of the nail core.
- An advantageous embodiment of the intramedullary nail according to the invention also relates to an embodiment in which the core of the nail is already inserted into the interior of the covering element.
- a method for internal stabilization and/or fixation of an elongated hollow body is also proposed, the method having the following steps and in particular in the order listed: a) providing an intramedullary nail according to the invention, b) possibly reducing the extent of the outer contour the covering element by tensioning the elongate spring element in the winding direction, c) inserting, starting with its distal end, the covering element into the hollow body, d) possibly increasing the expansion of the outer contour of the enveloping element by relaxing the elongated spring element against the winding direction, e) possibly bracing the enveloping element against an inner wall of the hollow body by further relaxing the elongated spring element against the winding direction, f) inserting, starting with it distal end of the nail core through the proximal end of the cover element into the interior of the cover element, g) optionally anchoring the nail core in the cover element, in particular in a nail head.
- a method for the internal stabilization and/or fixation of a bone having the following steps, and in particular having the following steps in the order listed: a) providing an intramedullary nail according to the invention, al) possibly creating an incision point in the bone, a2) possibly drilling out or milling out the medullary canal, b) possibly reducing the expansion of the outer contour of the sleeve element by bracing the elongated spring element in the winding direction, c) inserting, starting with its distal end, the sleeve element into the bone, and in particular through an incision point in the bone, d) possibly increasing the extent of the outer contour of the sleeve element by relaxing the elongated spring element against the winding direction, e) possibly bracing the sleeve element against an inner wall of the bone by further relaxing the elongated spring element against the winding direction, f) inserting, beginning with its distal end, the nail core through the proximal end of the
- Figure 1 is a side view of a preferred embodiment of the intramedullary nail according to the invention, shown here with the nail core not fully inserted,
- FIG. 2 shows a side view of the exemplary embodiment from FIG. 1, shown here with a curved course
- FIG. 3 shows a side view of the nail core of the exemplary embodiment from FIGS. 1 and 2
- 4 shows a lateral and enlarged sectional view of the nail head of the exemplary embodiment from FIGS. 1 and 2, shown here with the nail core fully pushed in
- FIG. 5 shows a perspective view of the exemplary embodiment from FIGS. 1 and 2, shown here with the nail core fully inserted
- FIG. 6 shows a perspective view of the exemplary embodiment from FIGS. 1, 2 and 5, shown here with the nail core fully pushed in and an end cap lying above it.
- FIG. 1 shows a side view of a preferred exemplary embodiment of the intramedullary nail 1 according to the invention, comprising a covering element 10 and a nail core 100, the nail core 100 not being shown fully inserted into the covering element 10 for the sake of clarity.
- the intramedullary nail 1 has two separate parts, namely a covering element 10 which extends in a longitudinal direction L and has a proximal end 12, a distal end 14 and an essentially cylindrical interior space 16, with an outer contour of the Cover element 10 has an elongated spring element 18 which, starting from the proximal end 12 and based on the longitudinal direction L, is wound in a helical course.
- a covering element 10 which extends in a longitudinal direction L and has a proximal end 12, a distal end 14 and an essentially cylindrical interior space 16
- an outer contour of the Cover element 10 has an elongated spring element 18 which, starting from the proximal end 12 and based on the longitudinal direction L, is wound in a helical course.
- the expansion of the outer contour of the casing element 10 can be reduced by tensioning the elongated spring element 18 in the winding direction and can be increased by relaxing the elongated spring element 18 counter to the winding direction.
- the intramedullary nail 1 comprises an essentially rod-shaped nail core 100 which can be introduced or introduced into the interior space 16 through the proximal end 12 of the covering element 10 .
- the covering element 10 essentially has the shape of a hollow cylinder, so that the interior space 16 essentially assumes a cylindrical shape.
- the spring element 18 essentially covers the view of the interior 16 here.
- the outer contour of the casing element 10 is essentially formed by the coiled spring element 18 .
- the spring element 18 is wound in the form of a three-dimensional spiral, and here in particular in the form of a cylindrical spiral.
- the spring element 18 is elastically deformable, so it can be assumed that the spring element 18 here forms a three-dimensional spiral spring, and here in particular a helical spring.
- the spring element 18 is also an elastically deformable wire or spring wire.
- the covering element 10 can thus be easily reduced by tensioning the spring element 18 .
- the covering element 10 can also be braced against the inner wall of an elongated hollow body to be stabilized by widening its outer contour, namely by relaxing the spring element 18 .
- the enveloping element 10 has not only one spring element 18, but two elongated spring elements 18, 1018 arranged one above the other, which are wound in a helical course in relation to the longitudinal direction L of the enveloping element 10.
- a second spring element 1018 runs inside the spring element 18 or else the first spring element 18.
- the two spring elements 18, 1018 arranged one above the other form a three-dimensional double spiral, namely in particular a double helix.
- the two spring elements 18 , 1018 arranged one above the other are wound in opposite directions compared to one another and consist of a continuous element which transitions from the first spring element 18 into the second spring element 1018 at the distal end 14 .
- the proximal end 12 of the covering element 10 has a nail head 20 .
- the beginning of the first spring element 18 and the end of the second spring element 1018 are arranged on the nail head 20 .
- the nail head 20 has an axial opening 22 for inserting the nail core 100 . Further details of the nail head 20 are discussed with reference to FIG.
- FIG. 2 shows a side view of the exemplary embodiment of the medullary nail 1 according to the invention from FIG. 1, a curved course of the medullary nail 1 being shown here.
- the nail core 100 can also be inserted from the outside into a sleeve element 10, which is already inserted into a hollow body to be stabilized (not shown) or which is already inserted into a bone (not shown). ) is implanted.
- the nail core 100 can in particular also be inserted into a covering element 10 which has a kink 24 or a bend.
- the nail core 100 is designed to be elastically deformable, in particular elastically bendable here.
- the kink 24 in the covering element 10 is approximately 10° compared to the longitudinal direction L here. Such a kink 24 occurs in particular during implantation in an incision point arranged laterally opposite the medullary canal, for example in a lower leg bone.
- FIG. 3 shows a side view of the nail core 100 of the exemplary embodiment of the intramedullary nail 1 according to the invention from FIGS. 1 and 2.
- the nail core 100 consists here of solid material and has a circular cross section.
- the distal end 114 of the nail core 100 has a tip 102 which is rounded. This considerably simplifies the insertion and passage of the nail core 100 into the already implanted covering element 10 .
- the proximal end 112 of the nail core 100 is widened compared to the other radial extent of the nail core 100 . In this way, the nail core 100 can be anchored in the nail head 20 with its proximal end 112 .
- This widening 104 of the proximal end 112 of the nail core 100 is realized by suitable reshaping, for example squeezing, of the proximal end 112 .
- 4 shows a lateral and enlarged sectional view of the nail head 20 of the exemplary embodiment of the intramedullary nail 1 according to the invention from FIGS. 1 and 2, which is shown here with the nail core 100 completely pushed in.
- This representation first shows the centrally arranged nail core 100 on the inside, which has been pushed completely into the interior space 16 of the covering element 10 here.
- An outer sleeve 26 rotatable about the longitudinal direction L is connected to the beginning of the first spring element 18 .
- the spring element is further braced and the diameter of the casing element 10 becomes smaller.
- Another inner sleeve 28 that can be rotated about the longitudinal direction L is connected to the end of the second spring element 1018 .
- the spring element 1018 is further relaxed and can finally rest against the inside of the first spring element 18 in order to stabilize and secure it.
- the securing sleeve 30 arranged on the very outside secures the outer, first spring element 18.
- the proximal end 112 of the nail core 100 is anchored in the inner sleeve 28 or in the axial opening 22 due to the widening 104 of its proximal end 112 . Because of the widening 104, the nail core 100 cannot move further to the distal end 14 (not visible here) of the covering element 10. Otherwise, in the worst case, the nail core 100 could gradually work its way through the covering element 10 into an adjacent bone or an adjacent joint and cause damage there.
- an end cap 32 is arranged over the proximal end 112 of the nail core 100, which can be screwed onto the proximal end 12 of the covering element 10, here onto the right-hand side of the nail head 20.
- the end cap 32 prevents the nail core 100 from undesirably working out of the covering element 10, namely via its proximal end 12.
- the end cap 32 represents a smooth surface of the intramedullary nail 1 on the outside and is therefore well tolerated by the surrounding tissue or bone material.
- FIG. 5 shows a perspective view of the exemplary embodiment of the intramedullary nail 1 according to the invention from FIGS. 1 and 2, which is shown here with the nail core 100 completely pushed in.
- the spring elements 18, 1018 arranged one above the other in the form of a double helix can first be seen particularly well here.
- the axial opening 22 in the proximal end 12 of the covering element 10, namely here in the nail head 20, can be seen well in this representation.
- the inner sleeve 28, the outer sleeve 26 and the securing sleeve 30 enclose the nail core 100.
- the circumferentially interrupted design of the inner sleeve 28 and the outer sleeve 26 provides in a very suitable manner a tool engagement for tensioning or relaxing the spring elements 18, 1018 .
- the proximal end 112 of the nail core 100 has here been pushed completely into the opening 22 or into the inner sleeve 28 . This corresponds to the desired end position of the nail core 100 in relation to the cover element 10.
- the length L of the nail core 100 corresponds to the axial extent of the coiled spring element 18 plus the length of the nail head 20 .
- FIG. 6 shows a perspective view of the exemplary embodiment of the intramedullary nail 1 according to the invention from FIGS. 1, 2 and 5, which is shown here with the nail core 100 completely pushed in and an end cap 32 lying above it.
- the situation from FIG. 5 is first shown here, with the end cap 32 additionally being screwed onto the proximal end 12 of the covering element, namely onto the nail head 20 .
- the intramedullary nail 1 is thus shown in an implanted or operational state.
- Embodiment 1 medullary nail for internal stabilization and/or fixation of an elongated hollow body, in particular a bone
- the medullary nail having two separate parts, namely a) a covering element extending in a longitudinal direction with a proximal end, a distal end, and with an im Substantially cylindrical interior space, wherein an outer contour of the sleeve element, viewed perpendicularly to the longitudinal direction, has an elongate spring element which, starting from the proximal end and in relation to the longitudinal direction, is wound in a helical course, and wherein the expansion of the outer contour of the sleeve element is caused by a tensioning of the elongate Spring element can be reduced in the winding direction and increased by relaxing the elongated spring element against the winding direction, and b) a substantially rod-shaped nail core, which can be inserted into the interior space through the proximal end of the sleeve element.
- Embodiment 2 Intramedullary nail according to the preceding embodiment, wherein the covering element essentially has the shape of a hollow cylinder.
- Embodiment 3 Intramedullary nail according to one or both of the preceding embodiments, wherein the outer contour of the covering element is essentially formed by the coiled spring element.
- Embodiment 4 Intramedullary nail according to one or more of the preceding embodiments, wherein the spring element is wound in the form of a three-dimensional spiral, and in particular in the form of a cylindrical spiral.
- Embodiment 5 intramedullary nail according to one or more of the preceding embodiments, wherein the spring element is elastically deformable.
- Embodiment 6 Intramedullary nail according to one or more of the preceding embodiments, wherein the spring element forms a three-dimensional spiral spring, and in particular a helical spring.
- Embodiment 7 Intramedullary nail according to one or more of the preceding embodiments, wherein there is a spacing or no spacing between adjacent turns of the spring element.
- Embodiment 8 Intramedullary nail according to one or more of the preceding embodiments, wherein the spring element is a wire or a band.
- Embodiment 9 Intramedullary nail according to one or more of the preceding embodiments, in which the covering element can be clamped by expanding its outer contour in relation to the inner wall of an elongated hollow body to be stabilized.
- Embodiment 10 Intramedullary nail according to one or more of the preceding embodiments, wherein the covering element has two elongated spring elements arranged one above the other, which are each wound in a helical course in relation to the longitudinal direction of the covering element.
- Embodiment 11 Intramedullary nail according to the preceding embodiment, wherein the two spring elements arranged one above the other form a three-dimensional double spiral, in particular a double helix.
- Embodiment 12 Medullary nail according to one or both of the two preceding embodiments, wherein the two spring elements arranged one above the other are wound in opposite directions or in the same direction.
- Embodiment 13 Medullary nail according to one or more of the three preceding embodiments, wherein the two spring elements arranged one above the other are wound in opposite directions and consist of a continuous element which at the distal end transitions from a first spring element into a second spring element.
- Embodiment 14 Intramedullary nail according to one or more of the preceding embodiments, wherein the nail core can be inserted from the outside into a covering element which is already inserted into a hollow body to be stabilized or which is already implanted in a bone.
- Embodiment 15 Medullary nail according to one or more of the preceding embodiments, wherein the nail core is elastically deformable, in particular elastically bendable.
- Embodiment 16 Medullary nail according to one or more of the preceding embodiments, wherein the nail core can be inserted into a covering element which has a kink or a bend.
- Embodiment 17 Intramedullary nail according to one or more of the preceding embodiments, wherein the core of the nail consists of solid material.
- Embodiment 18 Intramedullary nail according to one or more of the preceding embodiments, wherein the nail core has a round, in particular circular, cross section.
- Embodiment 19 Intramedullary nail according to one or more of the preceding embodiments, wherein the nail core has a Herzog curvature.
- Embodiment 20 Intramedullary nail according to one or more of the preceding embodiments, wherein the proximal end of the covering element has a substantially axial opening for inserting the nail core.
- Embodiment 21 Intramedullary nail according to one or more of the preceding embodiments, wherein the proximal end of the covering element has a nail head.
- Embodiment 22 Intramedullary nail according to the preceding embodiment, wherein the nail head has a sleeve or bushing which can be rotated about the longitudinal axis and which is connected to the beginning or the end of a spring element.
- Embodiment 23 Intramedullary nail according to one or more of the preceding embodiments, wherein the proximal end of the covering element, in particular a nail head, has an end cap on the side facing away from the covering element.
- Embodiment 24 Intramedullary nail according to one or more of the three preceding embodiments, wherein the length of the nail core corresponds to the axial extent of the coiled spring element plus the length of the nail head.
- Embodiment 25 Intramedullary nail according to one or more of the preceding embodiments, wherein the distal end of the nail core has a tip which is rounded.
- Embodiment 26 Medullary nail according to one or more of the preceding embodiments, wherein the proximal end of the nail core can be fixed or anchored in the proximal end of the covering element, in particular in a nail head.
- Embodiment 27 Intramedullary nail according to one or more of the preceding embodiments, wherein the proximal end of the nail core is widened compared to any other radial extension of the nail core.
- Embodiment 28 Intramedullary nail according to the previous embodiment, wherein the widening is realized by the process of reshaping, pushing open or squeezing, or by a thread.
- Embodiment 29 Intramedullary nail according to one or more of the preceding embodiments, wherein a diameter of the covering element can be reduced to a diameter of the nail core by tensioning a spring element.
- Embodiment 30 Intramedullary nail according to one or more of the preceding embodiments, wherein the core of the nail is inserted into the inner space.
- Embodiment 31 Intramedullary nail according to one or more of the preceding embodiments, wherein the intramedullary nail further has at least one of the features discussed in the above description.
- Embodiment 32 Intramedullary nail according to one or more of the preceding embodiments, wherein the intramedullary nail has the additional features of at least one of the exemplary embodiments presented in the above description.
- Embodiment 33 Intramedullary nail according to one or more of the preceding embodiments, wherein the intramedullary nail is designed according to one of the exemplary embodiments presented in the above description.
- Embodiment 34 Intramedullary nail according to one or more of the preceding embodiments, wherein the intramedullary nail has the additional features of at least one further preceding embodiment.
- Embodiment 35 nail core for an intramedullary nail according to one or more of the preceding embodiments.
- Embodiment 36 Method for internal stabilization and/or fixation of an elongate hollow body, the method having the following steps, and in particular in the order listed: a) providing an intramedullary nail according to one or more of the preceding embodiments 1 to 34, b) if necessary Reducing the expansion of the outer contour of the covering element by tensioning the elongated spring element in the winding direction, c) inserting, starting with its distal end, the covering element into the hollow body, d) possibly increasing the expansion of the outer contour of the covering element by relaxing the elongated spring element against the direction of winding, e) possibly bracing the covering element against an inner wall of the hollow body by further relaxing the elongated spring element against the direction of winding, f) inserting, starting with its distal end, the nail core through the proximal end of the covering element into the interior of the covering element , g) optionally anchoring the nail core in the covering element, in particular in a nail head.
- Embodiment 37 Method for the internal stabilization and/or fixation of a bone, the method having the following steps, and in particular having the following steps in the order listed: a) providing an intramedullary nail according to one or more of the preceding embodiments 1 to 34, al) if necessary Creation of an incision point in the bone, a2) if necessary drilling out or milling out the medullary canal, b) possibly reducing the expansion of the outer contour of the sleeve element by tensioning the elongated spring element in the winding direction, c) introducing, starting with its distal end, the sleeve element into the bone, and in particular through an incision point in the bone, d) possibly enlarging the expansion of the outer contour of the sleeve element by relaxing the elongated spring element against the winding direction, e) possibly tightening the sleeve element against an inner wall of the bone by further relaxing the elongated spring element against the winding direction, f) inserting the nail
- Embodiment 38 Method according to one of the two preceding embodiments, wherein the method has at least one of the features discussed in the above description and/or is designed according to one of the exemplary embodiments set out in the above description or has at least one feature thereof.
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Abstract
Description
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DE112022005455.7T DE112022005455A5 (de) | 2021-11-16 | 2022-11-15 | Zweiteiliger marknagel sowie nagelkern hierfür |
EP22839121.5A EP4432944A1 (de) | 2021-11-16 | 2022-11-15 | Zweiteiliger marknagel sowie nagelkern hierfür |
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DE202021106260.6U DE202021106260U1 (de) | 2021-11-16 | 2021-11-16 | Zweiteiliger Marknagel sowie Nagelkern hierfür |
DE202021106260.6 | 2021-11-16 |
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DE202022104343U1 (de) | 2022-07-30 | 2023-11-07 | Jabez Medical GmbH & Co. KG | Vorrichtung zum Betätigen eines Marknagels, umfassend ein Gewindeelement zum Anschluss eines Marknagels |
DE202022104342U1 (de) | 2022-07-30 | 2023-11-07 | Jabez Medical GmbH & Co. KG | Vorrichtung zum Betätigen eines Marknagels, umfassend ein Adapterstück, Set zur Bereitstellung einer solchen Vorrichtung, Adapterstück, sowie Adapterset |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE908906C (de) * | 1950-06-02 | 1954-04-12 | Dr Med H C Ernst Pohl | Federnde Knochenschraube, besonders fuer Schraeg- und Laengsbrueche |
DE3835682A1 (de) | 1988-10-20 | 1990-04-26 | Labitzke Reiner Prof Dr Med Ha | Vorrichtung zur stabilisierung von roehrenknochenbruechen sowie von gelenken |
DE19731298A1 (de) | 1996-12-30 | 1999-11-18 | Basheir Madhoon | Nagelsystem für die intramedulläre Osteosynthese bei Schaftfrakturen aller Art und Totalendprothesen |
WO2006066536A1 (de) | 2004-12-23 | 2006-06-29 | Michael Zielsdorf | Marknagel |
WO2014060576A1 (de) | 2012-10-19 | 2014-04-24 | Rapido Med Gmbh | Intramedullärer marknagel |
WO2014060578A1 (de) | 2012-10-19 | 2014-04-24 | Rapido Med Gmbh | Aufsatz für das proximale ende eines marknagels |
WO2015117996A1 (de) | 2014-02-05 | 2015-08-13 | CREADO medtec GmbH | Anordnung zur innenstabilisierung und/oder -fixierung eines langgestreckten hohlkörpers sowie vorrichtung zum betätigen dieser |
DE102018005690A1 (de) | 2018-02-13 | 2019-08-14 | OMEGA salvation UG (haftungsbeschränkt) | Flexibler Doppelhelix Marknagel |
DE202020003051U1 (de) | 2020-07-16 | 2020-08-12 | OMEGA salvation UG (haftungsbeschränkt) | Anordnung zur Frakturversorgung von Knochen |
-
2021
- 2021-11-16 DE DE202021106260.6U patent/DE202021106260U1/de active Active
-
2022
- 2022-11-15 WO PCT/DE2022/100854 patent/WO2023088517A1/de active Application Filing
- 2022-11-15 EP EP22839121.5A patent/EP4432944A1/de active Pending
- 2022-11-15 DE DE112022005455.7T patent/DE112022005455A5/de active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE908906C (de) * | 1950-06-02 | 1954-04-12 | Dr Med H C Ernst Pohl | Federnde Knochenschraube, besonders fuer Schraeg- und Laengsbrueche |
DE3835682A1 (de) | 1988-10-20 | 1990-04-26 | Labitzke Reiner Prof Dr Med Ha | Vorrichtung zur stabilisierung von roehrenknochenbruechen sowie von gelenken |
DE19731298A1 (de) | 1996-12-30 | 1999-11-18 | Basheir Madhoon | Nagelsystem für die intramedulläre Osteosynthese bei Schaftfrakturen aller Art und Totalendprothesen |
WO2006066536A1 (de) | 2004-12-23 | 2006-06-29 | Michael Zielsdorf | Marknagel |
WO2014060576A1 (de) | 2012-10-19 | 2014-04-24 | Rapido Med Gmbh | Intramedullärer marknagel |
WO2014060578A1 (de) | 2012-10-19 | 2014-04-24 | Rapido Med Gmbh | Aufsatz für das proximale ende eines marknagels |
WO2015117996A1 (de) | 2014-02-05 | 2015-08-13 | CREADO medtec GmbH | Anordnung zur innenstabilisierung und/oder -fixierung eines langgestreckten hohlkörpers sowie vorrichtung zum betätigen dieser |
DE102018005690A1 (de) | 2018-02-13 | 2019-08-14 | OMEGA salvation UG (haftungsbeschränkt) | Flexibler Doppelhelix Marknagel |
DE202020003051U1 (de) | 2020-07-16 | 2020-08-12 | OMEGA salvation UG (haftungsbeschränkt) | Anordnung zur Frakturversorgung von Knochen |
Non-Patent Citations (1)
Title |
---|
KÜNTSCHER, G.MAATZ, R.: "Technik der Marknagelung", 1945, GEORG THIEME VERLAG |
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EP4432944A1 (de) | 2024-09-25 |
DE112022005455A5 (de) | 2024-09-05 |
DE202021106260U1 (de) | 2023-02-27 |
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