EP4240257A1 - Medizinischer clip - Google Patents
Medizinischer clipInfo
- Publication number
- EP4240257A1 EP4240257A1 EP21805409.6A EP21805409A EP4240257A1 EP 4240257 A1 EP4240257 A1 EP 4240257A1 EP 21805409 A EP21805409 A EP 21805409A EP 4240257 A1 EP4240257 A1 EP 4240257A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- female
- male
- torsion
- clamping arm
- boundary surfaces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
- A61B17/122—Clamps or clips, e.g. for the umbilical cord
- A61B17/1227—Spring clips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
- A61B17/128—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord for applying or removing clamps or clips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/00526—Methods of manufacturing
Definitions
- the present invention relates to a medical clip, in particular in the form of an aneurysm clip, which comprises a first clamping arm, a second clamping arm and a pretensioning element with a first and a second end, the first clamping arm having a first clamping arm end which has a first connecting section with connected to the first end of the biasing member, the second clamp arm having a second clamp arm end connected to the second end of the biasing member via a second connecting portion, the clip comprising a push-through closure having a final aperture located or formed on the first connecting portion and a the end section encompassed by the second connecting section and penetrating the final opening, the first clamping arm and the second clamping arm coming as close as possible to one another in a basic position of the clip, in particular abutting one another, and counteracting the effect of the prestressing element can be moved away from one another from the basic position into an open position, the first clamping arm starting from the first end of the clamping arm and the second clamping arm starting from the second end
- Medical clips of the type described above are known in many different ways. In particular, they are used as aneurysm clips.
- the prestressing force exerted by the prestressing element in particular a spring force
- these are opened to a specific value in accordance with an existing standard and placed on a test device.
- the force determined also referred to as the closing force, must then lie within a specific tolerance window specified by the standard. Otherwise, the clip must be reworked or discarded as unusable.
- the proposed development allows the connecting sections to be twisted in the area of the push-through connection, so that the clamping arms can twist freely or almost freely.
- a collision on both sides of the male and female boundary surfaces facing each other in the area of the push-through closure can be ruled out by the torsion chamfers.
- the proposed female and/or male torsion chamfers formed on the female boundary surfaces and/or on the male boundary surfaces allow point contact of the connecting sections in the area of the push-through closure in conventional clips as a result of torsion of the clamping arms, namely when edges collide at the final opening and the final section, to be replaced by the provided torsion chamfers by a line contact.
- an edge/surface contact can be achieved, which results in a line contact as a result of a torsion instead of a point contact.
- the risk of the connecting sections tilting in the area of the push-through connection as a result of torsion of the clamping arms can be significantly reduced.
- friction in the area of the push-through connection as a result of torsion of the clamping arms can also be reduced.
- the influence of the torsion of the clamping arms when checking the closing force of the clip can be reduced. If both female and male torsion chamfers are provided, two surfaces in the area of the push-through closure are able to bear against each other when the connecting sections are torsioned.
- torsion chamfers So can be compared to a one-sided formation of torsion chamfers, so if either only at the female boundary surfaces or only on the male boundary surfaces are provided, by the proposed chamfering of both the female and male boundary surfaces in the end area of the clip, i.e. by the formation of female and male torsion chamfers, to further reduce friction in the area of the push-through closure.
- Such a reduction in friction has a particularly positive effect on measured value scatter when determining the spring force of medical clips, which in turn reduces rejects during production.
- the male and/or female torsion chamfers are advantageously attached to precisely the edges of the final opening or the final section, which swing out when the clamping arms are subjected to torsional loading and lead to point or line contact.
- the male and/or the female torsion chamfers are formed only in those areas of the final opening and the final section where the connecting sections are located while the maximum torsional moment is acting. These are in particular the positions starting from a completely closed medical clip, i.e. when the clamping arms are in contact with one another, up to an opening width of around 10% to around 50%, preferably up to an opening width of around 30%, based on a maximum possible opening of the clips.
- Torsion chamfers of this type can be produced in a simple manner, for example by milling. Furthermore, they particularly ensure optimal guidance of the connecting sections in the area of the push-through closure, since as a result of torsion the respective torsion bevels can always interact simultaneously with corresponding boundary surfaces of the other connecting section.
- only the two female boundary surfaces are provided with a female torsion chamfer.
- This configuration makes it possible in particular special to minimize friction in the area of the push-through connection and still be able to oppose the opening of the clamping arms with sufficient resistance.
- male torsion chamfers are also easier to produce than female torsion chamfers in the area of the final opening.
- the medical clip can be formed in a simple manner if the two male boundary surfaces run parallel to one another. Such boundary surfaces can optimally guide an opening and closing movement of the medical clip, in particular in cooperation with female boundary surfaces running parallel to one another. It is particularly advantageous here if play in the area of the push-through connection, ie in particular a distance between the male and female boundary surfaces interacting with one another, is minimal.
- the push-through closure should be shaped in such a way that free twisting of the connecting sections in the area of the push-through closure is not possible if possible.
- the medical clip can be produced in a simple manner if the end section is of elongated cuboid design.
- a closing section has, in particular, four closing section edges running parallel to a longitudinal axis defined by the closing section. These can interact with end opening edges of the end opening when the connecting sections twist. Furthermore, the trailing portion edges can be easily chamfered.
- the push-through closure can be implemented in a simple manner, in particular by the fact that the final opening is in the form of a slot and defines a final plane, and that the two female boundary surfaces run parallel to the final plane.
- Such an embodiment can be produced in a particularly simple manner.
- a defined pivoting of the clamping arms relative to one another can in particular be specified by the closing plane defined in this way.
- the two male boundary surfaces run parallel or essentially parallel to the final plane in the basic position.
- they can be oriented parallel to female boundary surfaces running parallel to one another.
- a pivoting movement of the clamping arms can be specified in a defined pivoting plane that runs parallel to the final plane.
- the first clamping arm and the second clamping arm are curved out of the closing plane or angled in relation to it in such a way that free ends of the same point in a direction that runs transversely, in particular perpendicularly, to the closing plane .
- Forming clamping arms in this way makes it possible in particular to be able to place the clip in a wide variety of applications.
- aneurysms can be clamped that do not form a bulge transversely, in particular perpendicularly, to a longitudinal axis of the application instrument, but rather parallel or essentially parallel to the longitudinal axis of the instrument, also referred to as the application axis.
- a curvature of the clamping arms can in particular be continuous, so that a jaw part defined by the two clamping arms can be formed, for example, in an arc shape.
- a particularly flexible use of medical clips can be achieved in particular by the first clamping arm and the second clamping arm being continuously curved.
- a radius of curvature of both clamping arms must be constant. In this way, in particular, an arcuate clip can be formed.
- first clamping arm and the second clamping arm each have at least one angled portion and if the at least one angled portion is arranged or formed between a free end and the first and second clamping arm ends.
- a hollow organ in particular a blood vessel or a bulge thereof
- a bend for example, an L-shaped jaw part defined by the two clamping arms can be realized.
- a bayonet-shaped or double-L-shaped jaw part can be realized with two bends.
- the first clamping arm and the second clamping arm preferably run parallel to one another over their entire length in the basic position, in particular when they rest against one another in this position.
- Such a configuration makes it possible in particular to reduce the risk of so-called “scissoring", ie the side edges of the clamping arms sliding off one another, which can lead to injury to tissue held between the clamping arms.
- first clamping arm and the second clamping arm can be pivoted about a pivot axis relative to one another from the basic position into a contact position in which the clamping arms are further apart than the basic position.
- a design enables simple handling of the medical clip, for example with an application instrument designed for this purpose, as well as defined opening and closing of the same by moving the clamping arms away from one another and towards one another again.
- the pivot axis preferably runs transversely, in particular perpendicularly, to the final plane.
- This configuration can in particular minimize the risk of "scissoring" described above.
- defined handling of the medical clip, in particular application of the same is possible for a user.
- the application instrument can be designed in such a way that a surgeon actuates actuating elements of the application instrument which are arranged such that they can move in relation to one another in a plane, with the plane running parallel to the final plane.
- the medical clip can be formed in a simple manner if the female and/or the male torsion bevels define flat bevel surfaces.
- the torsion surfaces i.e. male and/or female, can be designed to run out into the respective boundary surface without edges. In this way, clips can be opened and closed sensitively.
- the female boundary surfaces and female chamfer surfaces which are defined by the female torsion chamfers, enclose a female chamfer angle and if the female chamfer angle has a value in has a range of about 5°.
- the female bevel angle can have a value in a range from about 10° to about 18°, in particular the value can be about 15°.
- the male boundary surfaces and male chamfer surfaces defined by the male torsion chamfers enclose a male chamfer angle and that the male chamfer angle has a value in a range from about 5° to about 25°, in particular a value in one Range from about 10° to about 18°.
- the male bevel angle has a value of about 15°.
- the male bevel angle can be limited to the most unfavorable possible torsion or twisting of the clamping arms relative to one another.
- the selected male bevel angle can in particular also limit torsion of the clamping arms relative to one another, that is to say define a stop, as it were.
- Friction in the area of the push-through closure can be minimized in a simple manner in that the female bevel angle corresponds or essentially corresponds to the male bevel angle.
- the female and/or the male torsion bevels define curved bevel surfaces. In this way, optimal guidance of the boundary surfaces and chamfer surfaces interacting with one another can be achieved.
- the curved bevel surfaces define cutting lines with a cutting plane on the respective connecting section transverse to the boundary surfaces thereof and if the cutting lines starting from the chamfered boundary surface have a constant or increasing curvature.
- Curved chamfer surfaces with a constant curvature can be defined in particular by surfaces of right circular cylinders or right hollow cylinders.
- Curved chamfer surfaces with increasing curvature can, for example, define intersection lines that form the section of an ellipse.
- intersection lines of the torsion bevels advantageously define a section of an ellipse.
- Such a cutting line can have an increasing curvature, in particular starting from the chamfered boundary surface.
- a continuous movement of the connecting sections relative to each other as a result of torsion of the clamping arms can be specified in this way.
- the final opening defines four final opening edges adjoining the female boundary surfaces and if two final opening edges rotated by 180° relative to one another with respect to a first longitudinal axis defined by the first connecting section the female torsion bevels are chamfered.
- the female torsion chamfers which are designed in the proposed manner, enable torsion of the connecting sections relative to one another in such a way that line contact is achieved instead of the point contact that occurs with conventional clips, which would result in canting with very high friction will.
- a torsion of the connecting sections relative to one another can be made possible to a certain extent, in which case, in the worst case, there will be line contact between interacting surfaces or edges, which help to minimize friction in the area of the push-through connection compared to conventional clips.
- the end section defines four end section edges and if two, relative to one of the second connecting section defined second longitudinal axis are chamfered by 180 ° against each other twisted final section edges through the male torsion chamfers.
- the two female torsion bevels and/or the two male torsion bevels are designed to prevent a torsional movement of the connecting sections relative to one another about the longitudinal axes of the respective connecting sections when the clamping arms are closed when there is a clamped item between them is included, to guide and to limit.
- twisting of the connecting sections in the area of the push-through closure can be made possible as a result of torsional forces acting on the clamping arms when the clamping arms are closed when a clamped item is held between them.
- the two male boundary surfaces and the two female boundary surfaces each define sections of lateral surfaces of a right circular cylinder and when connecting section longitudinal axes of the two connecting sections each define circular cylinder longitudinal axes of the respective lateral surfaces.
- the male and/or female torsion bevels can be curved and can also define sections of lateral surfaces of right circular cylinders.
- Such a configuration can be achieved in particular if the end section has a circular cross section and if the end opening also has sections of the first connecting section that laterally delimit it have circular cross sections. In this way, when the clamping arms are pivoted relative to one another, no reduction in play between the final opening and the final section is brought about, even if torsional forces act on them.
- the medical clip can be formed in a simple manner if the lateral surface radii of the male boundary surfaces and the female boundary surfaces are identical or essentially identical.
- the medical clip can be formed in a simple manner, in particular by forming the connecting sections, in particular the final opening and/or the final section, by milling, by electrochemical metal removal, by an additive manufacturing process, in particular 3D printing, or by die-sinking.
- male and/or female boundary surfaces and/or the male and/or female torsion chamfers are provided with a friction-reducing coating.
- possible friction losses in the area of the push-through closure can be further reduced.
- the medical clip, in particular the interacting connecting sections in the area of the push-through closure can be made of a material that forms a material pairing with favorable sliding properties.
- first clamping arm and/or the second clamping arm and/or the prestressing element are formed by an additive manufacturing process.
- This makes it possible, in particular, to form the entire medical clip using an additive manufacturing process.
- the entire clip can be produced using a 3D printing process.
- the first clamping arm and the second clamping arm are preferably prestressed against one another in the basic position. This configuration can help in particular to ensure that a clamped item arranged between the clamping arms can be clamped permanently and with a defined closing force.
- a biasing element can be easily formed in the form of a helical spring with at least one complete turn.
- the clip is made of at least one material that is compatible with the body, in particular only of a single material that is compatible with the body.
- the body-compatible material is advantageously a metal, in particular titanium, or a plastic.
- the materials mentioned can be used in a simple manner to form medical clips.
- the clip is designed in the form of an aneurysm clip.
- the clip is preferably designed in one piece, in particular monolithically.
- Such a clip can be formed, for example, by an additive manufacturing process or from a blank.
- FIG. 1 a schematic perspective overall view of a first exemplary embodiment of a medical clip and a clip application instrument
- FIG. 2 shows a schematic, perspective, enlarged view of a distal end region of the clip instrument with the medical clip received in an open position of the same;
- FIG. 3 a view of the arrangement from FIG. 2 in the direction of arrow A;
- FIG. 4 a view similar to FIG. 3, but with the hollow organ clamped off;
- FIG. 5 a view of the arrangement from FIG. 4 in the direction of arrow B;
- FIG. 6 shows a perspective overall view of a further exemplary embodiment of a medical clip which has only male torsion chamfers
- FIG. 7 an enlarged partial view of area C from FIG. 6;
- Figure 8 is a schematic sectional view taken along line 8-8 of Figure 7 with no torsional forces acting;
- FIG. 9 a schematic view of the arrangement similar to FIG. 8 with acting torsional forces
- FIG. 10 a schematic perspective view of a further exemplary embodiment of a medical clip similar to FIG. 6;
- FIG. 11 a sectional view similar to FIG. 8 in the area of the push-through closure of the exemplary embodiment of the medical clip from FIG. 10;
- FIG. 12 a view similar to FIG. 11, but with torsional forces acting on the clamping arms;
- FIG. 13 a schematic partial view of a further exemplary embodiment of a medical clip in the area of the push-through closure with exclusively female torsion chamfers;
- Figure 14 is a sectional view taken along line 14-14 of Figure 13;
- FIG. 15 a schematic view similar to FIG. 14, but with torsional forces acting;
- FIG. 16 a schematic, partially broken side view of a further exemplary embodiment of a medical clip in the area of the push-through closure with male and female torsion chamfers;
- FIG. 17 a schematic sectional view along line 17-17 in FIG. 16 without acting torsional forces.
- FIG. 18 a schematic view similar to FIG. 17, but with torsional forces acting.
- FIG. It An exemplary embodiment of a clip application system is shown schematically in FIG. It includes an application instrument 12 and a first exemplary embodiment of a medical clip 14 which is designed in the form of an aneurysm clip 16 .
- the application instrument 12 comprises two branches 20 and 22 which can be pivoted relative to one another about a pivot axis 18 and on the distal ends of which tool elements 24 and 26 are formed which form a receptacle 28 for receiving a proximal end region 30 of the clip 14 .
- the two branches 20 and 22 are in a basic position by two interacting leaf spring elements 32 and 34 at the proximal ends of Branches 20 and 22 are arranged or formed, held in a maximum distance from each other or deflected position.
- the clip 14 is thereby opened.
- the medical clip 14 includes a biasing member 40 having a first end 42 and a second end 44.
- the biasing member 40 is formed in the form of a coil spring 46, the more than one winding includes.
- the clip 14 includes a first clamping arm 48 and a second clamping arm 50.
- the first clamp arm 48 extends from a free end 54 to a first clamp arm end 56.
- the second clamp arm 50 extends from a free end 58 to a second clamp arm end 60.
- the first end 42 of the biasing member 40 is connected to the first clamp arm end 26 via a first connection portion 62 .
- the second end 44 of the biasing member 40 is connected to the second clamp arm end 60 of the second clamp arm 50 via a second connection portion 64 .
- the medical clip 14 includes a push-through closure 66 which includes a final aperture 68 and a final portion 70 penetrating the final aperture 68 .
- the final opening 68 is arranged or formed on the first connecting section 62 .
- the end section 70 is formed on the second connecting section 64 and is therefore encompassed by it.
- the clamping arms 48 and 50 are as close together as possible. In the exemplary embodiment illustrated in FIGS. 1 to 5, they rest against one another in the basic position, as illustrated schematically in FIG.
- clamping arms 48 and 50 can be moved away from each other against the action of the biasing element 40 from the home position to an open position.
- the embodiment of the clip 14 is shown schematically in an open position.
- the first clamping arm 48 starting from the first clamping arm end 56 and the second clamping arm 50 starting from the second clamping arm end 60 are curved or angled in the direction of the free ends 54 and 58.
- Two female boundary surfaces 72 pointing toward one another are formed at the final opening 68 . Consequently, the two female boundary surfaces 72 laterally delimit the final opening 68 .
- Two male boundary surfaces 74 pointing away from one another and towards the female boundary surfaces 72 are formed on the end section 70 .
- the final opening 68 is designed like a slot and defines a final plane 76.
- the two female boundary surfaces 72 run parallel to one another and parallel to the final plane 76.
- the male boundary surfaces 74 which are arranged with little play between the female boundary surfaces 72 in the basic position, are each provided with a male torsion chamfer 78.
- the male boundary surfaces 74 are parallel to each other.
- the male torsion lands 78 are parallel to each other. In the basic position, the two male boundary surfaces 74 run parallel or essentially parallel to the closing plane 76.
- the male torsion chamfers 78 define flat chamfer surfaces 80. These are designed to run into the boundary surfaces 74 on both sides without edges.
- the male boundary surfaces 74 and the associated chamfer surfaces 80 of the male torsion chamfers 78 enclose a male chamfer angle 82 between them. This has a value in a range from about 5° to about 25°. In the embodiment illustrated in Figures 7 through 9, the male bevel angle ⁇ 2 ranges from about 10° to about 18°. About 15° is shown.
- the first clamping arm 48 and the second clamping arm 50 are curved out of the closing plane 76 or angled relative to it in such a way that the free ends 54 and 58 point in a direction that is transverse, and in the exemplary embodiment shown in the figures, vertical in the basic position to the final level 76 runs.
- FIG. 6 shows schematically that the first clamping arm 48 and the second clamping arm 50 each have an angled portion 84 which is arranged or formed between a free end 54 or 58 and the first and second clamping arm ends 56 or 60, respectively.
- the first clamping arm 48 and the second clamping arm 50 rest against one another. Consequently, they run parallel to one another over their entire length.
- the first clamping arm 48 and the second clamping arm 50 can be transferred from the basic position shown schematically in Figure 1 to the application position shown schematically in Figure 2, in which the clamping arms 48 and 50 are further apart than the basic position, namely pivotable about a pivot axis 86 .
- the pivot axis 86 is essentially defined by a longitudinal axis of the helical spring 46 which runs transversely, in particular perpendicularly in the basic position, to the closing plane 76 .
- the end section 70 defines four end section edges 88, 90, 92 and 94.
- the two end section edges 90 and 94 originally present in a blank, for example, which are rotated by 180° relative to one another in relation to a second longitudinal axis 96 defined by the second connecting section 64, are formed by the two male torsion chamfers 78 chamfered, so no longer available.
- the tool elements 24 and 26 can also be moved towards one another in order to work on the tool elements 24 and 26 adjacent portions of the connecting portions 62 and 64 to move against the action of the biasing member 40 towards each other.
- the clamping surfaces 98 and 100 can optionally be provided with a macroscopic surface structure 102, as shown schematically in the exemplary embodiment in FIGS. As shown schematically in FIGS.
- the opened clip 14 can be pushed over the hollow organ 104, which is shown schematically in the form of a blood vessel 106.
- the leaf spring elements 32 and 34 force the branches 20 and 22 apart and thus the tool elements 24 and 26 move away from each other.
- the clip 14 is urged back from the applied position to the home position by the biasing member 40 .
- the included angle 108 is in particular smaller than the male bevel angle 82, but can also have approximately the same value or can also be somewhat larger.
- the special configuration of the push-through closure 66 with the male torsion chamfers 78 on the male boundary surfaces 74 enables a torsional movement of the connecting sections 62 and 64 relative to one another about a first longitudinal axis 110 of the first connecting section 62 and the second longitudinal axis 96 of the second connecting section 64 when the clamping arms are closed 48 and 50 when a clamped item 112, for example the hollow organ 104, is accommodated between them, to guide and limit.
- FIGS. 10 to 12 another embodiment of a medical clip 14 is shown schematically. Its structure is similar to that of the medical clip shown in FIGS. It differs essentially in that the free ends 54 and 58 of the clamping arms 48 and 50 are angled in the opposite direction relative to the closing plane 76, i.e. point in the opposite direction compared to the free ends 54 and 58 of the clamping arms 48 and 50 from FIG embodiment of the clip 14 shown in Figures 6 to 9.
- FIGS. 10 to 12 correspond to the reference numbers used in connection with the exemplary embodiment of the clip 14 according to FIGS. 6 to 9.
- FIGS. 6 and 10 it can be seen that the two clips 14 shown in these figures are mirror-symmetrical to one another. Ultimately, this does not change their function, but it does require the formation of the male torsion chamfers 78 on other end section edges of the end section 70, namely at the end section edges 88 and 92. The reason for this is that there is a gap between the clamping surfaces 98 and 100 in the case of the one shown in FIG 6 to 9 leads to a torsional movement of the end section 70 about the second longitudinal axis 96, which is directed opposite to the torsional movement of the end section 70 in the exemplary embodiment of FIGS.
- the two exemplary embodiments of the clips 14 according to Figures 6 to 9 on the one hand and according to Figures 10 to 12 on the other hand show by way of example that the male torsion bevels 78 are arranged in such a way that they enable torsion of the connecting sections 62 and 64 relative to one another around the male bevel angle 82 by chamfering the male boundary surfaces 74 or the terminal section edges leading to canting in conventional clips in such a way that the torsion of the connecting sections 62 or 64 relative to one another is made possible in order to enable line contact between the connecting sections 62 and 64 instead of point contact.
- FIGS. 6 to 9 Another exemplary embodiment of a medical clip 10 is partially shown schematically in FIGS.
- This exemplary embodiment differs from the exemplary embodiment in FIGS. 6 to 9 only in the design of the push-through closure 66.
- only the two female boundary surfaces 72 are each provided with a female torsion chamfer 122 .
- These two female torsion chamfers 122 are parallel to each other.
- the edges 114 and 118 of the end area opening are chamfered by the female torsion chamfers 122 . These are rotated relative to one another by 180° with respect to the first longitudinal axis 110 defined by the first connecting section 62 .
- the female bounding surfaces 72 and female land surfaces 124 defined by the female torsion land 122 include a female land angle 126 having a value in a range from about 5° to about 25°. In one embodiment, the value ranges from about 10° to about 18°. In the embodiment shown in the figures, the female bevel angle 126 is approximately 15°.
- the female torsion bevels 122 are dimensioned in such a way that they remove a maximum of approximately 50% of the two female boundary surfaces 72 facing one another.
- the female chamfer surfaces 124 described are flat. They run into the female boundary surfaces 72 without edges.
- the exemplary embodiment of the clip 14 according to FIGS. 13 to 15 corresponds to the exemplary embodiment of the clip 14 as was explained in detail in connection with FIGS.
- a torsion of the connecting sections 62 and 64 relative to one another about the first longitudinal axis 110 is made possible, so that there is no point contact between abutting edges of the end section 70 and the end opening 68, but rather a Line contact between two of the weft section edges 88, 90, 92 and 94 and the two female land surfaces 124 of the female torsion land 122.
- the structure of the medical clip 14 of Figures 16 to 18 corresponds to the clip 14 of Figures 10 to 12, but differs from it in the design of the push-through closure 66.
- the end portion 70 is similar to the end portion 70 of the embodiment of Figures 10 to 12 trained.
- the final opening 68 is designed in accordance with the final opening 68 according to the exemplary embodiment in FIGS. This not only enables torsion about one of the two longitudinal axes 110 and 96, but also about both longitudinal axes 110 and 96 at the same time.
- the chamfering of both the female boundary surfaces 72 and the male boundary surfaces 74 allows the clamping arms 48 and 50 to twist freely. A collision on both sides of the connecting sections 62 and 64 in the area of the push-through connection 66 is thus ruled out.
- the clip 14 be much more pointedly aligned, i.e., toward the free ends 54 and 58 of the clamp arms 48 and 50, to accommodate such torsion.
- the clip 14 be much more pointedly aligned, i.e., toward the free ends 54 and 58 of the clamp arms 48 and 50, to accommodate such torsion.
- a significant portion of the desired opening width of the clip 14 is lost.
- FIG. 7 Another exemplary embodiment of a medical clip 14 is shown schematically in FIG. It is very similar to the exemplary embodiment in FIGS. 7 to 9 and differs therefrom only in the design of the male bevel surfaces 80. Unlike the exemplary embodiment in FIGS. 7 to 9, these are not flat but curved.
- the curved chamfer surfaces 80 define intersection lines 128 with a plane of intersection at the second connecting portion 64 transverse to the male terminal surfaces 74 thereof. Starting from the chamfered boundary surfaces 74, the cutting lines 128 have an increasing curvature. In alternative, non-illustrated exemplary embodiments, the curvature can also be constant.
- intersection lines 128 of the male torsion chamfers 78 define a section of an ellipse.
- a further exemplary embodiment of a medical clip 14 is shown in detail in FIG. Its structure corresponds to that of the clip shown schematically in Figures 1 to 9, but differs in the design of the push-through closure 66.
- the male boundary surfaces 74 and the female boundary surfaces 72 each define sections of lateral surfaces of a right circular cylinder.
- the longitudinal axes 110 and 96 of the connecting sections 62 and 64 each define circular cylinder longitudinal axes of the respective lateral surfaces.
- all of the contact edges relevant to torsion of the two connecting sections 62 and 64 are chamfered in the region of the push-through connection 66, namely provided with curved chamfered surfaces. Pivoting, i.e. in particular torsion, of the clamping arms 48 and 50 relative to one another in this configuration does not reduce the play between the opening in the end area 68 and the end section 70.
- lateral surface radii of the male boundary surfaces and the female boundary surfaces are identical.
- the connecting sections 62 and 64 of the exemplary embodiments of medical clips 14 described above, namely in particular their end openings 68 and/or end sections 70, are optionally formed by milling, by electrochemical metal removal, by an additive manufacturing process, in particular 3D printing, or by die-sinking.
- the male and/or female boundary surfaces 72, 74 and the male and/or female torsion chamfers 78, 122 are provided with a friction-reducing coating.
- the first clamping arm 48 and/or the second clamping arm 50 and/or the prestressing element 40 are formed by an additive manufacturing process.
- the entire medical clip 14 is formed using an additive manufacturing process.
- the medical clips described above are designed in particular in such a way that the first clamping arm 48 and the second clamping arm 50 are prestressed against one another in the basic position.
- the exemplary embodiments of medical clips 14 described above are formed from a body-compatible material.
- the exemplary embodiments of medical clips described and illustrated are in particular designed in one piece. In this case, they are made from only a single biocompatible material.
- the body-compatible material is optionally a metal, for example titanium, or a plastic.
- a pre-twisted closure in the form of a push-through closure is provided.
- the female and male boundary surfaces are not chamfered either at the final opening or at the final section. So there are no torsion bevels provided.
- the pre-twist of the end is set such that an angular range of the pre-twist corresponds to an angular range of the torsion chamfers provided in the above-described exemplary embodiments of clips.
- the targeted attachment of torsion chamfers 78 and/or 122 described above in connection with various exemplary embodiments of medical clips 14 represents an effective means of reducing friction occurring in the area of the push-through closure 66 .
- this is particularly advantageous in the case of aneurysm clips 16 which have curved or single or multiple angled clamping arms 48 and 50, also referred to as laterally deflected jaw parts, which absorb a torsional moment when they are applied to a clamped item 112.
- the reduction in friction due to the modified design of the push-through closure 66 has a positive effect on measured value scatter when determining the spring force, i.e. the force exerted by the prestressing element 40, so that rejects can be reduced in the production of such clips.
- due to the change in the shape of the push-through closure 66 it is possible to reduce the number of medical clips 14 whose closing force or spring force is not within the range of the tolerance specified by the test standard.
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Reproductive Health (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020128942.1A DE102020128942A1 (de) | 2020-11-03 | 2020-11-03 | Medizinischer Clip |
| PCT/EP2021/079946 WO2022096357A1 (de) | 2020-11-03 | 2021-10-28 | Medizinischer clip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4240257A1 true EP4240257A1 (de) | 2023-09-13 |
Family
ID=78536170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21805409.6A Pending EP4240257A1 (de) | 2020-11-03 | 2021-10-28 | Medizinischer clip |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20230255637A1 (de) |
| EP (1) | EP4240257A1 (de) |
| JP (1) | JP7774624B2 (de) |
| CN (1) | CN116669640A (de) |
| DE (1) | DE102020128942A1 (de) |
| WO (1) | WO2022096357A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1102595S1 (en) * | 2022-09-08 | 2025-11-18 | Aesculap Ag | Clip applier |
| EP4445849A1 (de) * | 2023-04-14 | 2024-10-16 | Aesculap AG | Medizinischer clip |
| US20250082331A1 (en) * | 2023-09-08 | 2025-03-13 | Atricure, Inc. | Curved dual side spring v-clip for surgical treatment of left atrial appendage |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1837277A (en) * | 1930-07-01 | 1931-12-22 | Lund Charles Walter | Tonsil-removing instrument |
| US3911766A (en) * | 1974-05-15 | 1975-10-14 | Pilling Co | Box lock surgical instrument and method of its manufacture |
| US3952749A (en) * | 1974-05-15 | 1976-04-27 | Pilling Co. | Box lock surgical instrument |
| DE3139488C2 (de) * | 1981-10-03 | 1984-08-16 | Aesculap-Werke Ag Vormals Jetter & Scheerer, 7200 Tuttlingen | Aneurysma-Clip |
| US4796625A (en) * | 1982-11-15 | 1989-01-10 | Codman & Shurtleff, Inc. | Aneurysm clip |
| US4530356A (en) * | 1983-02-08 | 1985-07-23 | Helfgott Maxwell A | Ophthalmic surgical instrument with beveled tip |
| US5053045A (en) * | 1988-09-16 | 1991-10-01 | Schmidt Ferenc J | Surgical clip |
| US4961743A (en) * | 1989-01-03 | 1990-10-09 | Codman & Shurtleff, Inc. | Torsion spring |
| US5019092A (en) * | 1989-10-04 | 1991-05-28 | Pilling Company | Liver transplant clamp |
| JPH0533127Y2 (de) * | 1990-10-19 | 1993-08-24 | ||
| JP3532565B2 (ja) * | 1991-12-31 | 2004-05-31 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 再剥離型低溶融粘度アクリル系感圧接着剤 |
| DE19719246C1 (de) * | 1997-05-07 | 1999-02-04 | Aesculap Ag & Co Kg | Chirurgische Klemme |
| DE19809121C1 (de) * | 1998-03-04 | 1999-08-12 | Aesculap Ag & Co Kg | Gefäßclip |
| US6056764A (en) * | 1998-03-18 | 2000-05-02 | Smith; Thomas C. | Opthalmic surgical blade having hard single bevel edges |
| US7351248B2 (en) * | 2002-03-25 | 2008-04-01 | Tri-State Hospital Supply Corporation | Surgical instrument with snag free box hinge |
| CN100482178C (zh) * | 2005-08-04 | 2009-04-29 | 广东冠昊生物科技有限公司 | 带生物膜的血管瘤夹 |
| US20070276431A1 (en) * | 2006-05-26 | 2007-11-29 | Swartz Jennifer T | Surgical box hinge and method of making same |
| DE202006018587U1 (de) * | 2006-12-06 | 2007-03-15 | Zrinski Ag | Chirurgisches Instrument zur Implantierung eines Drahtes, vorzugsweise in einen Knochen |
| DE202009014310U1 (de) * | 2009-10-22 | 2010-03-04 | Thomas Tontarra Grundstücksverwaltungs GmbH & Co. KG | Chirurgisches Instrument |
| US20110288571A1 (en) * | 2010-05-24 | 2011-11-24 | Aesculap Ag | Surgical clip and surgical method for treating an aneurysm |
| DE102010037468A1 (de) | 2010-09-10 | 2012-03-15 | Aesculap Ag | Chirurgischer Clip |
| DE202011000800U1 (de) * | 2011-04-05 | 2011-05-26 | Aesculap AG, 78532 | Chirurgisches Instrument |
| DE102012211379A1 (de) * | 2012-06-29 | 2014-03-27 | Aesculap Ag | Chirurgischer Clip mit Innenfeder |
| DE102014114946A1 (de) * | 2014-10-15 | 2016-04-21 | Aesculap Ag | Chirurgischer Clip nach Art eines Karabiner-Clips |
| DE102017127290A1 (de) * | 2017-11-20 | 2019-05-23 | Aesculap Ag | Chirurgischer clip mit bügellosem führungssystem |
-
2020
- 2020-11-03 DE DE102020128942.1A patent/DE102020128942A1/de active Pending
-
2021
- 2021-10-28 CN CN202180088835.5A patent/CN116669640A/zh active Pending
- 2021-10-28 EP EP21805409.6A patent/EP4240257A1/de active Pending
- 2021-10-28 JP JP2023526942A patent/JP7774624B2/ja active Active
- 2021-10-28 WO PCT/EP2021/079946 patent/WO2022096357A1/de not_active Ceased
-
2023
- 2023-04-25 US US18/138,795 patent/US20230255637A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN116669640A (zh) | 2023-08-29 |
| WO2022096357A1 (de) | 2022-05-12 |
| JP2023547524A (ja) | 2023-11-10 |
| US20230255637A1 (en) | 2023-08-17 |
| DE102020128942A1 (de) | 2022-05-05 |
| JP7774624B2 (ja) | 2025-11-21 |
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