Medical clamp

Abstract

The invention relates to a medical clip, in particular in the form of an aneurysm clip, comprising a first clamping arm having a first clamping arm end, a second clamping arm having a second clamping arm end, and a pre-tensioning element having a first end and a second end, the first clamping arm has a first clamping arm end which is connected to a first end of the pre-tensioning element via a first connecting section, and wherein the second clamping arm has a second clamping arm end which is connected to a second end of the pre-tensioning element via a second connecting section, and wherein the clip comprises a through-plug closure which is connected to the first end of the pre-tensioning element via a second connecting section. The through-plug type locking part comprises a first connecting section and a second connecting section which interact with each other, and the through-plug type locking part is provided with at least one first locking through part and at least one second locking bridge part; the invention relates to a locking device for a motor vehicle, comprising a first connection section and a second connection section, said first connection section having a first locking through which the first connection section is arranged or formed on the first connection section and which is laterally delimited by two first locking bridges, and a second locking bridge which is included by the second connection section and which passes through the first locking through, said first locking through comprising two female bearing surfaces which are directed towards each other, and said second connection section having two female bearing surfaces which are directed towards each other. The at least one second locking bridge comprises two male bearing surfaces facing away from each other and facing the female bearing surface.

Description

Technical Field

[0001] This invention relates to a medical clip, particularly a medical clip in the form of an aneurysm clip, comprising a first clamping arm, a second clamping arm, and a pre-tensioning element having a first end and a second end. The first clamping arm has a first clamping arm end, which is connected to the first end of the pre-tensioning element via a first connecting section. The second clamping arm has a second clamping arm end, which is connected to the second end of the pre-tensioning element via a second connecting section. The clip includes a through-plug locking portion, which comprises a first connecting section and a second connecting section working together. The through-plug locking portion has at least one first locking through-hole portion. The first locking passage is arranged or constructed at a first connecting section and is laterally bounded by two first locking bridges. The second locking bridge is included by a second connecting section and passes through the first locking passage. The first locking passage includes two female support surfaces pointing toward each other. The at least one second locking bridge includes two male support surfaces facing away from each other and pointing toward the female support surfaces. At least two support surfaces are formed, each having a female support surface and a male support surface. The cooperating female support surface and male support surface extend parallel to each other and define a support plane. Background Technology

[0002] Medical clips of the type described at the beginning are known, for example, by WO2022 / 096357A1. Another type of medical clip with a through-type locking portion is described in DE202004015274U1. In this clip, the preload element additionally functions as a support pin for two cooperating hinge rings rotatable about the longitudinal axis of the preload element, with a clamping arm arranged or constructed at each hinge ring. Here, hinge ring 23, together with a guide plate, forms the locking through-portion, and hinge ring 22 forms a second connecting section passing through the locking through-portion. Furthermore, in DE19935418A1... Figure 1 and Figure 2 The document shows and describes in detail a medical clip with a through-plug locking mechanism that is very similar to DE202004015274U1.

[0003] In the closure region of an aneurysm clip, especially when the closure region is configured as a through-plug type closure, the closure components (i.e., the closure bridging portion at the first connecting section and the at least one second closure bridging portion at the second connecting section) move past each other during clip opening and closing. In particular, the closure components slide against each other. Friction occurs during this movement. In other words, during clip opening and closing, the closure bridging portions rub against each other with their interacting male and female support surfaces, leading to friction, but also wear, and resulting in cold welding, so-called "seizing." These effects produce increased repeatability inaccuracies when measuring the clip's closure force. Or, in other words, the repeatability accuracy when measuring the closure force is reduced.

[0004] For this type of clamp, it is important that the preload force (especially the spring force) applied by the preload element has a predefined value. To determine the spring force of an aneurysm clamp, the clamp is opened to a specific degree and placed on a testing device according to existing standards. The force measured here (i.e., the closing force described above) must be within a specific tolerance window preset by the standard; otherwise, the clamp must be reworked or rejected as a non-conforming product.

[0005] As stated, the clamp's closing force must be maintained within standard limits. Therefore, the maximum deviation must not exceed ±7.5% of the rated value. Furthermore, even after multiple openings, the closing force is only allowed to decrease by a small amount. The preset closing force loss must be less than 5%. The measurement principle used to determine the closing force and the preset limits or deviations are described in EN ISO 9713:2022.

[0006] Because friction is unavoidable during clamp manufacturing and the associated repetitive inaccuracies are associated with it, a significant portion of the available tolerances is lost during manufacturing. However, these tolerances are urgently needed as a process window in production.

[0007] It is known that the stronger the mutual compression between the male and female bearing surfaces acting on each other, the greater the friction. However, this counterforce cannot be arbitrarily reduced because the clamping arms (also known as the mouth parts) acting on each other achieve an unrestricted clearance relative to each other. Summary of the Invention

[0008] Therefore, the object of the present invention is to improve the type of medical clamp described at the beginning in such a way as to reduce repeatability inaccuracies when measuring closing force.

[0009] For the type of medical clip described at the beginning, this task is solved according to the invention by the following: a first locking bridging portion projection surface defined by the vertical projection of the first locking bridging portion into the support plane and a second locking bridging portion projection surface defined by the vertical projection of the at least one second locking bridging portion into the support plane overlap and define a projection overlap surface; at least one of the at least two support surfaces (especially each support surface) has at least one recess, such that the actual size of the support surface parallel to the support plane defined by the locking bridging portion including the at least one recess is smaller than the locking bridging portion projection surface projected into the support plane by the locking bridging portion including the at least one recess; two co-acting support surfaces on at least one (especially each) support surface that can be planarly abutted against each other or planarly abutted against each other define a contact overlap surface; and the ratio of the contact overlap surface to the projection overlap surface is in the range of about 1 / 25 to about 1 / 3.

[0010] The proposed improvement particularly reduces friction between the at least two acting support surfaces. The reduced size of the support surfaces, which slide flat against each other compared to the corresponding locking bridge dimensions, results in reduced static friction and facilitates the transition to sliding friction. For example, to measure the closing force, the clamp can be slightly opened, allowing the clamping arms to be placed on the two retaining pins. To measure the closing force again, the clamp is closed, whereby the sliding process in the locking region transitions to a static measurement state with static friction. The smaller the coefficient of friction during the transition from sliding friction to static friction, the smaller the frictional torque during closing force measurement, and therefore the smaller its influence on the measurement of the closing force, and thus the smaller the dispersion of the measurement results. Friction is minimized by reducing the contact overlap surface relative to the projected overlap surface within a given range, and thus, repeatability inaccuracies are reduced as desired. To achieve this reduction in the contact overlap surface relative to the projected overlap surface, either of the two acting support surfaces must be reduced to approximately 1 / 25 to 1 / 3 of the projected surface of the associated locking bridge. Alternatively, the two cooperating support surfaces can be reduced in size to about 1 / 5 to about 0.58. This reduction can be achieved by providing at least one recess in one of the two support surfaces or (if possible) in both support surfaces. Preferably, the ratio of the contact overlap surface to the projected overlap surface is in the range of about 10% to about 20%. Within the given ratio range, sufficiently good guidance can also be achieved by the abutting of the support surfaces against each other, while simultaneously reducing friction as desired. In particular, the ratio of the contact overlap surface to the projected overlap surface can be in the range of about 1 / 25 to about 1 / 4, in order to further reduce undesirable frictional effects.

[0011] If the at least one recess is configured as a groove in the support surface or as a chamfer at the support surface, friction can be reduced in a simple manner. In particular, the support surface can be constructed along two parallel or substantially parallel side edges, which are particularly parallel to the extension of the corresponding connecting section from the preload element to the corresponding clamping arm. Thus, one or two chamfers can be provided at the corresponding locking bridge to reduce the actual size of the support surface when it interacts with the support surfaces associated with it and constructed to act as each other. The chamfer can, in particular, define a flat surface or a curved surface, which can be convex or concave and curved away from the corresponding connecting section.

[0012] Preferably, the groove or bevel extends parallel or substantially parallel to the longitudinal direction defined by the corresponding locking bridge. For example, when the support surface extends from the preload element to the clamping arm in an S-shaped arc, the groove may pass through the longitudinal edges of the support surface on both sides.

[0013] Preferably, the beveled portion defines an inclined surface that encloses the supporting plane at an obtuse angle. The inclined surface can extend either flat or curved. The angle of inclination can preferably have a value in the range of about 140° to about 175°. As proposed, this, for example, forms an approximately flat angle at the transition from the supporting surface to the beveled portion, thereby avoiding burrs. Preferably, the angle of inclination is in the range of about 165° to about 172°.

[0014] Furthermore, it is advantageous for the grooves to extend transversely, and especially perpendicularly, to the longitudinal direction defined by the corresponding locking bridge. Multiple grooves can be provided in particular. These grooves can extend parallel to each other, especially. Additionally, the grooves can have an arcuate shape in cross-section, thereby forming an obtuse angle, preferably a flat angle, at the transition leading to the remainder of the support surface. This avoids burrs during the manufacture of the clamp.

[0015] Furthermore, it is preferable that the at least one recess is constructed in the form of a hollow spherical segment. In particular, the hollow spherical segment (also referred to as a hollow spherical section) may have a semi-hollow spherical shape or a portion of a semi-hollow spherical shape, thereby constructing a recess without a bottom cut. Such a recess can be constructed in a simple manner, for example, using a ball end mill. Preferably, the depth of the hollow spherical segment is significantly less than the radius of the hollow spherical segment. In particular, the depth is less than 1 / 5 of the radius.

[0016] Furthermore, it is preferable that the at least one recess is constructed by a through-hole in the locking bridge portion. For example, such a through-hole in the locking bridge portion can be constructed by drilling through the locking bridge portion.

[0017] When the through portion of the locking bridging section has a circular cross-section, the through portion of the locking bridging section can be constructed in a simple manner. Thus, the through portion of the locking bridging section can be constructed, in particular, by drilling.

[0018] In order to reduce the actual bearing surface acting relative to the projection surface of the corresponding locking bridge in a desired manner, it is advantageous that at least one (especially each) of the at least two bearing surfaces has a plurality of recesses in at least one of the two co-acting bearing surfaces. For example, this can reduce the size of the bearing surface that actually contributes to the friction of the corresponding bearing surface as desired, while minimizing the risk of jamming of the co-acting bearing surfaces.

[0019] When the multiple recesses have the same structure, medical clips can be constructed in a simple manner.

[0020] To optimize the reduction of the support surface, it is desirable that at least some of the plurality of recesses differ. In particular, differences in the shape and / or size of the recesses are conceivable. Thus, not only hollow spherical recesses but also grooves can be provided, especially at the same support surface. For example, more than two grooves of different shapes and sizes can be provided, and more than two recesses configured as hollow spherical segments can also be provided.

[0021] To achieve the smallest possible contact overlap, it is advantageous that each support surface includes at least one recess on the two acting support surfaces.

[0022] According to another preferred embodiment of the invention, the locking bridge portion, without considering the at least one recess, has a width in the longitudinal direction defined by the corresponding locking bridge portion ranging from about 0.9 mm to about 2.1 mm.

[0023] Furthermore, it is advantageous that, in the basic position of the clamp, the first and second clamping arms are brought as close as possible to each other (especially abutting each other), and can move away from each other from the basic position to the open position, overcoming the effect of the pre-tensioning element. The pre-tensioning element applies force to the two clamping arms so that when the clamping arms are released again by the user after opening, they can automatically return to the basic position from the open position. This force is precisely the closing force, which should be not only preset but also measured for the clamp with the highest possible repeatability, or in other words, with the lowest possible repeatability.

[0024] When the supporting surface is constructed to be flat or substantially flat, the optimal function of medical clips can be achieved, in particular. Therefore, the supporting surfaces that work together are also constructed to be flat or substantially flat.

[0025] According to a preferred embodiment of the invention, the through-plug type locking portion can be configured as a single through-plug type locking portion, and the second connection section includes only one second locking bridge portion. This single second locking bridge portion can pass through the first locking through portion, and is laterally limited by the two first locking bridge portions with their female support surfaces pointing toward each other.

[0026] Furthermore, it is preferable that the through-type locking portion be configured as a double through-type locking portion, wherein the second connecting section includes two second locking bridge portions, which laterally limit the second locking through portion, one of the two first locking bridge portions passing through the second locking through portion, and one of the two second locking bridge portions passing through the first locking through portion. The double through-type locking portion is particularly advantageous for medical clips with particularly long clamping arms (or mouthpieces) because it helps to minimize or even completely avoid the undesirable "scissor effect"—slippage at each other—at the side edges of the clamping arms when the clip is closed. This "scissor effect" carries the risk that soft tissue may be injured undesirably, or in the worst case, severed. This should be avoided as much as possible.

[0027] Preferably, the first clamping arm starts from the end of the first clamping arm and the second clamping arm starts from the end of the second clamping arm and is constructed in a straight line, a curve, or a bend towards its free end. In this way, a medical clamp with a mouth part of approximately arbitrary shape can be constructed to optimally treat aneurysms of various shapes and sizes in human or animal patients.

[0028] Preferably, the clip is constructed of a metallic material. This, in particular, ensures the stability of the clip in the desired manner. Suitablely, the metallic material is titanium or a titanium-containing alloy (e.g., Ti6Al4V). Therefore, it is advantageous that the clip is constructed of a biocompatible material to avoid rejection reactions.

[0029] Especially when the support surface is constructed of titanium or a titanium-containing alloy, the large contact overlap between the two acting support surfaces leads to undesirably high friction. Therefore, as explained, it is advantageous for at least one support surface of one of the at least two support surfaces to be reduced relative to the projected projection surface of the locking bridging portion.

[0030] Preferably, the co-operating support surface is constructed of a metallic material. In particular, the metallic material can be titanium or a titanium-containing alloy. Therefore, it is advantageous that the co-operating support surface is formed of a biocompatible material.

[0031] According to another preferred embodiment of the invention, the preload element can be configured as a helical spring with at least one winding portion. In particular, the helical spring can be configured with at least about 1.5 winding portions. For example, the preload element can be made by winding a blank constructed by a die.

[0032] When the first locking bridge portion and / or the second locking bridge portion have a rectangular cross-section without considering at least one recess, the manufacture of the medical clip can be further simplified, especially the construction of the flat support surface can be further simplified.

[0033] Furthermore, it is advantageous that at least one of the two cooperating bearing surfaces, particularly only one or both bearing surfaces, is covered with a coating. This coating can be particularly configured as a corrosion-reducing coating or a passivating coating.

[0034] Particularly suitable is that the coating is configured to reduce friction. Therefore, in addition to reducing the size of the support surface by providing at least one recess, the friction-reducing coating can further reduce undesirable friction between the support surfaces acting on each other.

[0035] Preferably, the coating is configured as an oxide layer. For example, when the medical clip is constructed of a titanium-containing material, the oxide layer can be titanium oxide. This oxide layer (especially in the case of titanium) is significantly harder than the base material of the clip, and therefore has a significantly lower tendency to seize up when the cooperating support surfaces slide against each other.

[0036] Oxide layers can be applied in a simple way through electroplating.

[0037] Preferably, the medical clip is constructed in the form of an aneurysm clip. In this way, the medical clip is particularly useful for treating aneurysms, that is, bulges, especially in hollow organs. Attached Figure Description

[0038] The following description of preferred embodiments of the present invention is provided in conjunction with the accompanying drawings. In the drawings: Figure 1 A schematic overall perspective view of a first embodiment of a medical clip with a single through-hole locking mechanism is shown. Figure 2 A schematic overall perspective view of a second embodiment of a medical clip with a double through-hole locking mechanism is shown. Figure 3 Show Figure 1 A partial schematic diagram of the first connecting section of the medical clip shown; Figure 4 Show Figure 1 A partial schematic diagram of the second connecting section of the medical clip in the image; Figure 5 Show Figure 1 A schematic cross-sectional view of a medical clip in the through-and-plug locking region; Figure 6 Show Figure 2 A schematic cross-sectional view of a medical clip in the through-and-plug locking region; Figure 7 Another embodiment of the medical clip is shown. Figure 5 A schematic cross-sectional view; Figure 8 Another embodiment of the medical clip is shown. Figure 6 A schematic cross-sectional view; Figure 9 A similar first connecting section of another embodiment of the medical clip is shown. Figure 3 Partial schematic diagram; Figure 10 Show along Figure 9 Sectional view of line 10-10 in the middle; Figure 11 A similar second connecting section, illustrating another embodiment of the medical clip Figure 4 Partial schematic diagram; Figure 12 Shown by Figure 9 and Figure 11 A schematic top view showing a partial cross-section of the locking region of an embodiment of a medical clip constructed from the first and second connecting sections shown. Figure 12A Show Figure 12 An enlarged schematic diagram of region A is provided to illustrate the overlapping projection surfaces of the locking bridge, the overlapping projection surfaces, and the contact overlapping surfaces of the two acting support surfaces. Figure 13 A similar first connecting section of another embodiment of the medical clip is shown. Figure 9 Partial schematic diagram; Figure 14 Show along Figure 13 Sectional view of line 14-14 in the middle; Figure 15 A similar second connecting section, illustrating another embodiment of the medical clip Figure 11 Partial schematic diagram; Figure 16 A similar first connecting section of another embodiment of the medical clip is shown. Figure 9 Partial schematic diagram; Figure 17 Show along Figure 16 Sectional view of line 17-17 in the middle; Figure 18A similar second connecting section, illustrating another embodiment of the medical clip Figure 11 Partial schematic diagram; Figure 19 Another embodiment of the medical clip is shown. Figure 5 A schematic cross-sectional view. Detailed Implementation

[0039] The first embodiment of the medical clip is in Figure 1 It is schematically shown and is generally labeled with reference numeral 10.

[0040] The medical clamp 10 includes a pre-tightening element 12 and two clamping arms, namely a first clamping arm 14 and a second clamping arm 16.

[0041] The preload element 12 has a first end 18 and a second end 20. The first clamping arm 14 has a first clamping arm end 22. The second clamping arm 16 has a second clamping arm end 24.

[0042] The first end 18 of the pretensioning element 12 is connected to the end 22 of the first clamping arm via the first connecting section 26. The second end 20 of the pretensioning element 12 is connected to the end 24 of the second clamping arm via the second connecting section 28.

[0043] The locking area of ​​the clip 10 is configured as a through-plug locking part 30, which includes two connecting sections 26 and 28.

[0044] The first connecting section 26 defines a locking passage 32, which is laterally bounded by two first locking bridges 34 and 36. The second connecting section 28 includes a single second locking bridge 38 that passes through the first locking passage 32.

[0045] The first locking through section 32 includes two female support surfaces 42 and 44 facing each other. The second locking bridging section 38 includes two male support surfaces 46 and 48 that are opposite to each other and facing the female support surfaces 42 and 44.

[0046] The through-type locking part 30 includes two support surfaces 50 and 52. Support surface 50 includes a female support surface 42 and a male support surface 46. Support surface 52 includes a female support surface 44 and a male support surface 48.

[0047] The interacting female and male support surfaces 42, 46 or 44, 48 extend parallel to each other and respectively define support planes 56 or 58. In this embodiment, support planes 56 and 58 also extend parallel to each other.

[0048] The through-plug type locking part 30 is configured as a single through-plug type locking part 62. The second connection section 28 includes only a single locking bridge part, namely the second locking bridge part 38.

[0049] exist Figure 2 The image schematically illustrates a second embodiment of the medical clip 10. This clip 10 is structurally similar to... Figure 1 The embodiments of clip 10 are substantially the same, thereby in Figure 2 In the embodiments, the same reference numerals are used to indicate the same or functionally similar components and elements.

[0050] Figure 2 Medical clips 10 and Figure 1 The difference in the first embodiment of the medical clip 10 lies in the design of the through-plug locking part 30. Figure 2 In this embodiment, the through-plug type locking part 30 is constructed as a double through-plug type locking part 64. The second connecting section 28 in this case includes two second locking bridge parts 38 and 40. The second connecting section 28 also includes a second locking through part 66. This second locking through part is laterally upper bounded by the two second locking bridge parts 38 and 40. In this double through-plug type locking part 64, the locking bridge part 38 and... Figure 1 The clip 10 passes through the first locking through-part 32 in a similar manner. However, the first locking bridge part 34 passes through the second locking through-part 66 in the case of the double through-plug type locking part 64.

[0051] like Figure 6 As schematically shown, an additional female support surface 68 is constructed at the second locking bridging portion 40, which interacts with the male support surface 70 at the first locking bridging portion 34. Therefore, in this double-through-plug locking portion 64, the male support surface 48 essentially forms the female support surface of the second locking through portion 66. In this case, the female support surface 44, in its function, forms the male support surface of the first locking bridging portion 34 in conjunction with the support surface 48.

[0052] The double-through-plug type locking part 64 includes three support surfaces 50, 52, and 54. Support surface 50 is formed by cooperating support surfaces 42 and 46. Support surface 52 is formed by cooperating support surfaces 44 and 48. Support surface 54 is formed by cooperating support surfaces 68 and 70.

[0053] The problem of insufficient repeatability in determining the closing force of known medical clips, as described at the beginning, is addressed below in the embodiment of medical clip 10 described in conjunction with the accompanying drawings by having at least one of the cooperating support surfaces 42, 46, 44, 48 and, if possible, 68, 70, with at least one recess to reduce the actual effective size of the support surface with said at least one recess 72 when acting in conjunction with the corresponding associated support surface, thereby similarly reducing the size of the contact overlap surface 74. The minimum prerequisite is that at least one of the support pairs 50, 52 and, if possible, 54 in the clip 10 with the double through-type locking portion 64 has at least one support surface with at least one recess. The contact overlap surface 74 is defined by a surface region in which the two cooperating support surfaces 42 and 46 or 44 and 48 or 68 and 70 of the support surfaces 50, 52, or 54, which are surface-mounted or surface-mounted, contact each other or slide against each other when the clip 10 is opened and closed.

[0054] The at least one recess 72 can be constructed in different forms, as will be explained below in conjunction with the accompanying drawings.

[0055] As defined, the contact overlap surface 74 lies within the respective support planes 56, 58, or 60. The support plane 60 is defined by the co-acting support surfaces 68 and 70.

[0056] It should be noted in advance that the locking bridge portion 38 in the single through-type locking portion 62 and the locking bridge portions 34 and 38 in the double through-type locking portion 64 have rectangular cross-sections, disregarding the at least one recess 72. The locking bridge portions 34 and 36 in the clip 10 with the single through-type locking portion 62 have substantially elongated elliptical cross-sections. In the double through-type locking portion 64, the locking bridge portions 36 and 40 have approximately rectangular cross-sections, respectively.

[0057] according to Figure 1 Embodiments of clip 10, 3, 4, and 5, have a plurality of recesses 72. These recesses 72 are configured as grooves 76 in support surfaces 42 and 46, which interact within clip 10 and define support surface 50. Figure 1 In embodiments 3, 4, and 5, the grooves 76 are parallel to each other and extend laterally to the longitudinal direction 78 or 80, which is defined on the one hand by the first locking bridge portions 34 and 36 and on the other hand by the locking bridge portion 38.

[0058] In the illustrated embodiment, the groove 76 is milled to achieve a smaller surface area, thereby reducing the effective size of the support surfaces 42 and 46, and similarly reducing the friction between these support surfaces.

[0059] The groove 76 has a boundary line in its cross-section, which forms an arc segment. Thus, at the transition leading to the support surfaces 42 and 46, an approximately obtuse angle is formed. This avoids the construction of burrs.

[0060] In medical clip 10 Figures 13 to 15 In the embodiment schematically shown in the middle section, only a single groove 76 is constructed in the support surface 42 or 44. This groove extends parallel or substantially parallel to the longitudinal direction 78 or 80 defined by the locking bridging portion 34 or 38, respectively. In this embodiment, the groove is also demarcated in cross-section by a line that defines an arc segment, thereby defining an approximately flat obtuse angle at the transition leading to the remaining portion of the support surface 42 or 46, which is reduced in size. Therefore, the support surfaces 42 and 46 abutting each other are reduced to the area of ​​the contact overlapping surface 74 within the common support plane 56, thereby reducing the friction between the support surfaces 42 and 46 compared to the support surfaces 42 and 46 without the groove 76.

[0061] exist Figures 9 to 11 In another embodiment schematically shown, two recesses 72 in the form of beveled portions 82 and 84 are constructed at the locking bridging portions 34 and 38, respectively. These beveled portions 82 and 84 are constructed at the support surfaces 42 or 46 and reduce the effective size of the support surfaces for mutual support, which extends parallel to the support plane 56. Therefore, at the locking bridging portion 38, the support surface 42 has only a narrow strip remaining parallel to the support plane 56, and the support surface 46 has only a narrow strip remaining parallel to the support plane 56. The beveled portions 82 and 84 define inclined surfaces 86 and 88, which form an obtuse angle 90 with the support plane 56. The angle 90 has a value in the range of approximately 140° to 175°. In the embodiment shown in the figures, the angle 90 is in the range of approximately 165° to 172°.

[0062] By constructing the beveled portions 82 and 86, as described, only narrow strips with a width corresponding to approximately 1 / 3 of the width 92 of the locking bridge portions 34 and 38 remain in the support surfaces 42 and 46. Therefore, the two support surfaces 42 and 46 can only abut against each other planarly within the area defined by the contact overlap surface 74. The contact overlap surface 74... Figure 12 and Figure 12A The diagram schematically shows the overlapping area of ​​the remaining portions of support surfaces 42 and 46. Figure 12A In the text, they are marked with double-dotted shading.

[0063] The first locking bridging portion projection surface 94 is defined by the vertical projection of the first locking bridging portion 34 into the support plane 56. The second locking bridging portion projection surface 96 is defined by the vertical projection of the second locking bridging portion 38 into the support plane 56. The locking bridging portion projection surfaces 94 and 96 overlap within the support plane 56, thus defining a projection overlap surface 98. These projection overlap surfaces are... Figure 12 and Figure 12A It is illustrated in the diagram, and in Figure 12A The double-shaded area is shown in the middle. In contrast, the contact overlapping surface 74 (which forms part of the projected overlapping surface 98) is shown in a quadruple-shaded form by the superposition of the double-shaded area and the double-dotted-shaded area of ​​the projected overlapping surface 98.

[0064] In this embodiment, the two support surfaces 42 and 46 of the support surface 50 have at least one recess 72, namely, two corresponding recesses 72 in the form of beveled portions 82 and 84, such that the actual size of the support surfaces 42 and 46 parallel to the support plane 56 is smaller than the projection surfaces 94 and 96 of the locking bridge portions 34 and 38 projected onto the support plane 56. The ratio of the contact overlap surface 74 to the projected overlap surface 98 is in the range of about 1 / 25 to about 1 / 3. (As illustrated in...) Figures 9 to 12 In the illustrated embodiment, assuming that one-third of the support surfaces 42 and 46 parallel to the support plane 56 are removed due to the two chamfered portions 82 and 84, the ratio is approximately 1 / 9. Compared to the original support surfaces 42 and 46 with a width of 92 (i.e., the support surfaces without considering the chamfered portions 82 and 84, and therefore without considering the two recesses 72), the remaining portions of the two support surfaces 42 and 46 are thus reduced to one-third of the width relative to the projection surfaces 94 and 96 of the first and second locking bridge portions. If the support surfaces 42 and 46 abut against each other, the product of the remaining portions of the support surfaces 42 and 46, correspondingly reduced to approximately one-third of their original size, is obtained, and thus the size of the contact overlap surface 74 is obtained, which is only approximately one-ninth of the size of the projected overlap surface 98.

[0065] The consideration described regarding the reduction of the size of the contact overlap surface 74 when at least one recess 72 is constructed in at least one of the two co-acting support surfaces 50, 52, or 54 can also be applied to other forms of recess 72. Thus, even in the case of grooves 76 constructed transversely to the longitudinal directions 78, 80, support surfaces 42 and 46 can be reduced in a similar manner, where instead of defining only a single contact overlap surface 74, multiple correspondingly smaller contact overlap surfaces 74 are defined, which, in total, have a size value in the range of approximately 1 / 25 to approximately 1 / 3 in relation to the projected overlap surface 98 to be determined as described above. A similar consideration arises for grooves 76 extending parallel to the longitudinal directions 78 and 80. Here, four contact overlapping surfaces 74 are formed by the contact of the respective two strips separated by the groove 76 in the remaining portions of the support surfaces 42 and 46, wherein the ratio of the total area of ​​the four contact overlapping surfaces 74 to the projected overlapping surface 98 is in the range of about 1 / 25 to about 1 / 3.

[0066] Figures 16 to 18 The connecting sections 26 and 28 of the clip 10 are schematically shown. In this embodiment, a plurality of recesses 72 are formed in the support surfaces 42 and 46, more specifically in the form of hollow spherical sections 100. In the illustrated embodiment, the depth of the recesses is much smaller than the radius of the hollow spherical sections 100. The hollow spherical sections 100 may, in particular, have a semi-hollow spherical shape. Here, the recesses 72 are also milled, so that an approximately flat obtuse angle is formed at the transition to the remaining portions of the support surfaces 42 and 46.

[0067] Even in this embodiment, considering the recess 72, the remaining portions of the support surfaces 42 and 46 are significantly reduced compared to the support surfaces 42 and 46 without considering the recess 72. Without considering the recess 72, as shown above, the first and second locking bridge projection surfaces 94 and 96 are also formed within the support plane 56. For the support surfaces 42 and 46 abutting each other with the recess 72 in the form of a hollow spherical segment 100, only a contact overlap surface 74 of a certain size remains after considering the recess 72, resulting in a ratio of the contact overlap surface 74 to the projection overlap surface 98 with a value ranging from approximately 1 / 25 to approximately 1 / 3.

[0068] Alternatively, the at least one recess 72 can also be constructed by a through-hole of the corresponding locking bridge portion 34 or 38. This through-hole of the locking bridge portion achieves a similar effect to... Figure 16 and 18 The views of the support surfaces 42 and 46, more specifically when the through portion of the locking bridge has a circular cross-section.

[0069] exist Figure 3 In embodiments 4, 9 to 11 and 16 to 18, at least one of the two co-operating support surfaces 42 and 46 of the support surface 50 has a plurality of recesses 72.

[0070] On the one hand Figure 3 and 4 In embodiments 16 to 18, the plurality of recesses 72 are constructed identically.

[0071] In an embodiment not shown in the figures, at least a portion of the plurality of recesses 72 may be constructed differently, or more precisely, selectively differ in their shape and / or in their size.

[0072] The embodiments described to date specify that the two working support surfaces 42 and 46 of the support surface 50 each include at least one recess 72.

[0073] Without considering the at least one recess 72, the width 92 of the locking bridging portions 34 and 38, transverse to the longitudinal direction 78 or 80 defined by the respective longitudinal bridging portions 34 or 38, has a value ranging from about 0.9 mm to about 2.1 mm. For example, the clip 10 may have different sizes overall, so that the width 92 (which is ultimately given by the diameter of the wire forming the raw material used to manufacture the clip 10) may have a value of, for example, about 1 mm, about 1.2 mm, or about 1.7 mm.

[0074] like Figure 1 and 2 As schematically shown, in the basic position of the corresponding clip 10, the clamping arms 14 and 16 are brought as close as possible to each other. Figure 1 and 2 An embodiment of the clamp 10 is shown, in which clamping arms 14 and 16 are abutting each other in a basic position. The clamping arms 14 and 16 can move away from each other from the basic position to an open position, overcoming the action of the pre-tightening element 12, so that the bulge of the hollow organ can be introduced between and clamped between the clamping surfaces 102 and 104 of the clamping arms 14 and 16, or more precisely, by releasing the clamp 10 so that the pre-tightening element 12 can apply a pre-tightening force to press the clamping surfaces 102 and 104 of the clamping arms 14 and 16 together.

[0075] Clamping arms 14 and 16 extend from the end 22 of the first clamping arm or from the end 24 of the second clamping arm toward the free ends 106 and 108.

[0076] exist Figure 1 and 2In one embodiment of the clamp 10, the clamping arms 14 and 16 extend in a straight line. In an alternative embodiment not shown, the clamping arms 14 and 16 extend in a curved or bent manner, wherein it must be ensured that, in the basic position, the clamping surfaces 102 and 104 are substantially in contact with each other over the entire extension length from the clamping arm ends 22, 24 to the free ends 106, 108.

[0077] exist Figure 1 and 2 In the embodiment shown, the preload element 12 is configured as a helical spring 110 with at least one winding portion. Figure 1 and 2 One embodiment includes a helical spring 110 with approximately 1.5 winding portions.

[0078] In all embodiments, the medical clip 10 is configured as an aneurysm clip 112.

[0079] The clip 10 is constructed of a metallic material. In the embodiment shown in the figure, the clip 10 is made of titanium or a titanium-containing alloy (e.g., Ti6Al4V).

[0080] The clip 10, constructed of the aforementioned metallic material, has support surfaces 42, 44, 46 and 48, and if possible 68 and 70, which are constructed of metallic material (i.e., titanium or titanium-containing alloys).

[0081] At least one of the support surfaces 42, 44, 46, and 48 (if possible) forming support surfaces 50, 52, and 54, and at least one of the support surfaces 68 and 70 (if possible), is covered in a manner not shown in detail. Specifically, each support surface is covered in at least one of the corresponding support surfaces 50, 52, and 54. This covering is an optional design for the clip 10. For example, only one of the support surfaces 42 and 46 may be covered, or both support surfaces 42 and 46 may be covered. This also applies accordingly to the other support surfaces 52 and 54 (if possible).

[0082] The coating is preferably configured to reduce friction.

[0083] For the metallic material used to manufacture the clip 10, the coating is preferably configured as an oxide layer. When the clip 10 is made of titanium or a titanium-containing alloy, the oxide layer is preferably a titanium oxide layer.

[0084] The oxide layer used to coat the support surfaces 42, 44, 46 and 48, and if possible 68 and 70, is preferably applied by electroplating.

[0085] Figure 7 and 19 Other embodiments of the clip 10 with a single through-hole locking part 62 are schematically shown. Figure 7 In the embodiments, such as Figure 5 As in the embodiment, not only are the support surfaces 42 and 46 of the support surface 50 provided with recesses 72, but the support surfaces 44 and 48 that define the support surface 52 are also provided with recesses. Figure 5 In the embodiment, the cooperating support surfaces 44 and 48 are each configured without recesses 72. Figure 19 In this embodiment, only the support surfaces 42 and 48 have recesses. Support surfaces 44 and 46 are configured without recess 72 (i.e., therefore without recesses). Thus, in Figure 19 In one embodiment, each support surface 50 or 52 has only one support surface 42 or 48, which is provided with at least one recess 72.

[0086] Figure 5 The common feature of embodiments 7 and 19 is that at least one of the support surfaces 50 and 52 has at least one support surface 42 and 46 or 42, 46, 44 and 48 or 42 and 48, which is provided with at least one recess 72.

[0087] exist Figure 5 In embodiments 7 and 19, the second locking bridge portion 36 of the first connecting section 26 is constructed from a so-called locking plate 114. This locking plate is inserted into two retractable portions 116 at the first connecting section 26 and welded to the first connecting section. The locking plate is used and welded to the corresponding clip 10 after it has been constructed from a wire-shaped blank through appropriate modification.

[0088] Figure 6 and 8 A schematic illustration shows variations of the clip 10 with a double through-type locking part 64. Figure 6 In the embodiments, support surfaces 46, 44, and 68 are configured without recesses 72 (i.e., therefore without recesses). In contrast, recesses 72 are constructed in support surfaces 42, 48, and 70. Thus, each support surface has at least one recess 72 in at least one of the two support surfaces of 50, 52, and 54.

[0089] exist Figure 8 In the schematically illustrated embodiment, all six support surfaces 42, 44, 46, 48, 68, and 70 are provided with at least one recess 72. Therefore, in this embodiment, the support surfaces 42, 44, 46, 48, 68, and 70 that interact and are correspondingly configured to support surfaces 50, 52, and 54 are also provided with at least one recess 72.

[0090] exist Figure 2In embodiments 6 and 8, the first locking bridge portion 36 and the second locking bridge portion 40 are configured as locking plates 114. The first and second locking bridge portions are similar to those described above in a manner not shown in detail. Figure 5 As described in the single through-hole locking section 62, 7 and 19 are placed into the retractable sections provided for this purpose at the two connecting sections 26 and 28 and welded into the retractable sections.

[0091] The embodiments of the medical clip 10 described above are for illustrative purposes only and are not exhaustive. For example, the number, shape, and size of the recesses 72 shown and described can be arbitrarily combined with each other and varied where possible. For example, a groove 76 can be constructed on a support surface, and one or two beveled portions 82, 84 or one or more hollow spherical segments 100 can be constructed on the support surface that interacts with the support surface. Grooves 76 that are parallel to the longitudinal direction on one side and transverse to the longitudinal direction on the other side can be combined with each other to construct a support surface 50, 52, or 54.

[0092] Especially in Figures 5 to 8 In the schematic cross-sectional view shown in Figure 19, the recess 72 is schematically drawn only as a placeholder. Grooves, beveled portions, and / or hollow spherical segments, as well as other forms, may be provided here to construct the recess 72.

[0093] In the described embodiments of the medical clip 10, the desired reduction in friction is achieved, in particular, by the ratio of the contact overlap surface 74 to the projected overlap surface 90 being in the range of about 1 / 25 to about 1 / 3, preferably in the range of about 1 / 25 to about 1 / 4. Depending on the selection and design of the recess 72, the contact overlap surface and the projected overlap surface are chosen in shape and size such that the corresponding mutually acting support surfaces are so large that the given ratio range is satisfied.

[0094] By providing at least one recess 72 in at least one of the support surfaces 42, 44, 46, 48, 68, and 70 of the support surface 50, 52, or 54 of the clamp 10, the contact overlap surface 74 relative to the projected overlap surface 98 can be reduced, thereby reducing the transition from static friction to sliding friction in at least one support surface 50, 52, and 54. This improves the repeatability accuracy in determining the closing force of the clamp 10, as explained at the beginning, or reduces repeatability deviation in a desired manner.

[0095] List of reference numerals in the attached diagram: 10 clips 12 preload elements 14 First clamping arm 16 Second clamping arm 18 First end 20 Second end 22 First clamping arm end 24 Second clamping arm end 26 First connecting section 28 Second connecting section 30 Through-plug type locking part 32 First Locking Through Section 34 First Locking Bridge 36 First Locking Bridge Section 38 Second Locking Bridge 40 Second Locking Bridge 42 Female support surface 44 Female Support Surface 46 male support surface 48 male support surface 50 support surface 52 support surfaces 54 support surfaces 56 Support plane 58 Support plane 60 Support Plane 62 Single through-hole plug-in locking mechanism 64 Double through-hole plug-in locking mechanism 66 Second Locking Through Section 68 female support surface 70 male support surface 72 Recessed area 74 Contact Overlapping Surface 76 grooves 78 Longitudinal direction 80 longitudinal direction 82 oblique cut 84 oblique cut 86 inclined plane 88 inclined plane 90° tilt angle 92 width 94 Projection surface of the first locking bridge section 96 Projection surface of the second locking bridge section 98 Projection Overlapping Surface 100 hollow sphere segment 102 clamping surfaces 104 clamping surfaces 106 free end 108 free ends 110 coil spring 112 aneurysm clip 114 Locking Plate

Claims

1. A medical clip (10), in particular in the form of an aneurysm clip, comprising a first clamping arm (14), a second clamping arm (16) and a pre-tensioning element (12) having a first end and a second end (18, 20), wherein The first clamping arm (14) has a first clamping arm end (24) which is connected to a first end (18) of the pre-tensioning element (12) via a first connecting section (26), wherein the second clamping arm (16) has a second clamping arm end (26) which is connected to a second end (20) of the pre-tensioning element (12) via a second connecting section (28), wherein the clamp (10) comprises a through-plug closure (30) which comprises the first and second connecting sections (26, 28) which act together, the through-plug closure having at least one first closure through-portion (32) which is arranged or configured at the first connecting section (26) and is laterally delimited by two first closure bridge portions (34, 36), and at least one second closure bridge portion (38) which is included by the second connecting section (28) and passes through the first closure through-portion (32), wherein the first closure through-portion (32) comprises two female bearing faces (42, 44; 48, 68) which point towards one another, and wherein the at least one second closure bridge portion (38) comprises two male bearing faces (46, 48; 68, 70) which point away from one another and towards the female bearing faces (42, 44), and wherein the first and second connecting sections (26, 28) are connected to one another via a connecting web (40) which is arranged between the first and second closure bridge portions (34, 36; 38).44,70), wherein at least two bearing face pairs (50, 52, 54) are formed, which bearing face pairs each have a female bearing face and a male bearing face (42, 46, 44, 48, 68, 70), and wherein the female and male bearing faces (42, 46, 44, 48, 68, 70) that act together each extend parallel to one another and define a bearing plane (56, 58, 60), characterized in that a first latching bridge projection plane (94) defined by a perpendicular projection of the first latching bridge (34, 36) into the bearing plane (56, 58, 60) and a second latching bridge projection plane (96) defined by a perpendicular projection of the at least one second latching bridge (38, 40) into the bearing plane (56, 58, 60) overlap one another and define a projection overlap plane (98); at least one of the bearing face pairs (50, 52, 54), in particular at least one of the two bearing faces (42, 46, 44, 48, 68, 70) of each bearing face pair, has at least one recess (72) such that the actual size of the bearing face (42, 46, 44, 48, 68, 70) parallel to the bearing plane (56, 58, 60) defined by the latching bridge (34, 36, 38, 40) including the at least one recess (72) is smaller than the latching bridge projection plane (94, 96) projected into the bearing plane (56, 58, 60) by the latching bridge (34, 36, 38, 40) including the at least one recess (72); the two bearing faces (42, 46, 44, 48, 68, 70) of at least one, in particular each, bearing face pair (50, 52, 54) that act together and lie against one another or lie against one another in a planar manner define a contact overlap plane (74); and the ratio of the contact overlap plane (74) to the projection overlap plane (98) is in the range from about 1 / 25 to about 1 / 3.

2. The medical clip of claim 1, wherein The at least one recess (72) is configured in the form of a groove (76) in the bearing face or in the form of a bevel (82, 84) at the bearing face (42, 46, 44, 48, 68, 70).

3. The medical clip of claim 2, wherein, The groove (76) or the bevel (82, 84) extends parallel or substantially parallel to a longitudinal direction (78, 80) defined by the respective latching bridge (34, 36, 38, 40).

4. The medical clip defined in either of claims 2 or 3, wherein, The bevel (82, 84) defines an inclined face (86, 88) which is sandwiched with the bearing plane (56, 58, 60) at an obtuse inclination angle (90), wherein in particular the inclination angle (90) has a value in the range of about 140° to about 175°, in particular in the range of about 165° to about 172°.

5. The medical clip according to any one of claims 2 to 4, wherein, The groove (76) extends transversely, in particular perpendicularly, to a longitudinal direction (78, 80) defined by the respective latching bridge (34, 36, 38, 40).

6. The medical clip according to any of the preceding claims, characterized in that The at least one recess (72) is configured in the form of a hollow spherical segment (100), in particular in the form of a half hollow sphere.

7. The medical clip according to any of the preceding claims, characterized in that The at least one recess (72) is configured by a latching bridge through-portion through the latching bridge (34, 36, 38, 40), wherein in particular the latching bridge through-portion has a circular cross-section.

8. The medical clip according to any of the preceding claims, characterized in that At least one of the two bearing face pairs (50, 52, 54), in particular at least one of the two co-acting bearing faces (42, 46, 44, 48, 68, 70) of each bearing face pair, has a plurality of recesses (72), wherein in particular a) the plurality of recesses (72) are identically configured; or b) at least a portion of the plurality of recesses (72) differ, in particular in terms of shape and / or size.

9. The medical clip according to any of the preceding claims, characterized in that The two co-acting bearing faces (42, 46, 44, 48, 68, 70) of each bearing face pair (50, 52, 54) comprise at least one recess (72).

10. The medical clip according to any of the preceding claims, characterized in that The width (92) of the latching bridge (34, 36, 38, 40) transversely to the longitudinal direction (78, 80) defined by the respective latching bridge (34, 36, 38, 40) without taking into account the at least one recess (72) is in the range of about 0.9 mm to about 2.1 mm.

11. The medical clip according to any of the preceding claims, characterized in that The through-plug latching (30): a) is configured in the form of a single through-plug latching (62) and the second connection section (28) comprises only one second latching bridge (38); or b) is configured in the form of a double through-plug latching (64), the second connection section (28) comprises two second latching bridges (38, 40) which laterally bound a second latching through-portion (66), one of the two first latching bridges (34, 36) passes through the second latching through-portion (66) and one of the two second latching bridges (38, 40) passes through the first latching through-portion (32).

12. The medical clip according to any of the preceding claims, characterized in that The first clamping arm (14) and the second clamping arm (16) are configured linearly or curvedly or angularly from the first clamping arm end (22) and from the second clamping arm end (24) in the direction of their free ends (106, 108).

13. Medical clamp according to any of the preceding claims, characterized in that a) the clamp (10) is configured from a metallic material, in particular from titanium or a titanium-containing alloy, in particular Ti6Al4V; and / or b) the cooperating bearing surfaces (42, 46, 44, 48, 68, 70) are configured from a metallic material, in particular from titanium or a titanium-containing alloy.

14. The medical clip according to any of the preceding claims, characterized in that The first and / or the second latching bridge (34, 36, 38, 40) has a rectangular cross section, disregarding the at least one recess (72).

15. The medical clip according to any of the preceding claims, characterized in that At least one bearing surface (42, 46, 44, 48, 68, 70), in particular only one bearing surface (42, 46, 44, 48, 68, 70) or both bearing surfaces (42, 46, 44, 48, 68, 70) of a bearing surface pair (50, 52, 54), of the two cooperating bearing surfaces (42, 46, 44, 48, 68, 70) is provided with a coating, In particular, a) the coating is configured to act as a friction-reducing layer; and / or b) the coating is configured in the form of an oxidation layer, in particular the oxidation layer is applied by means of electroplating.

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