Medical impact applying instrument

Abstract

To provide a medical impact applying instrument, in particular in the form of an impact hammer.SOLUTION: The medical impact applying instrument includes: a shaft 18 defining a shaft longitudinal direction 20, a proximal end and a distal end; and an impact applying body 26 which is arranged on the shaft and defines a longitudinal axis. The impact applying body in an impact position on the shaft is movable, in particular displaceable, between a distal stop part defining a distal stop position of the impact applying body and a proximal stop part defining a proximal stop position of the impact applying body, for transmitting an impact pulse to the distal end of the shaft in the distal or proximal direction. The impact applying instrument includes a fixing device for temporarily fixing the impact applying body to the shaft in at least one, in particular arbitrary, fixing position between the distal stop position and the proximal stop position.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a medical impacting instrument, especially in the form of an impact hammer, and in particular to an impacting instrument comprising a shaft defining a shaft longitudinal direction and a proximal and distal end, and an impacting body arranged on the shaft defining a longitudinal axis, in which the impacting body, in an impacting position on the shaft, is movable, in particular displaceable, between a distal stop defining a distal stop position and a proximal stop position of the impacting body, in order to transmit an impact pulse in a distal or proximal direction to the distal end of the shaft. [Background technology]

[0002] Medical impact instruments of the type described at the outset are known in various variants, for example in the form of impact hammers, also called "slap hammers". The distal end of the impact instrument can be coupled, for example, to an implant, for example in order to drive it into the bone or to drive it out of the bone by transmitting an impact pulse. Such an impact instrument can also optionally be coupled, in particular at its distal end, to a medical object. Due to the mobility of the impact body and the shaft relative to one another, in order to achieve such coupling, it is necessary to handle the impact instrument with both hands, i.e. to hold the shaft and the impact body with one hand. However, this is disadvantageous, especially in medical operations in operating theatres, since the operation time must always be kept as short as possible and it is desirable for the instruments used there to be easy to handle.

[0003] SUMMARY OF THE DISCLOSURE The object of the invention is therefore to improve a medical impact instrument of the type described at the outset in such a way that it is easier to handle. Summary of the Invention

[0004] This object is achieved by an impactor device according to the invention for medical use of the type mentioned at the outset, which comprises a fixing device for provisionally fixing the impactor body to the shaft end in at least one, in particular any, fixing position between a distal stop position and a proximal stop position.

[0005] A medical impacting instrument with such a fixing device allows the user to fix or lock, in particular, the impacting body to the shaft in one or more, in particular in a number of, arbitrary fixing positions. Fixing here should be understood to mean that the impacting body and the shaft are immovable relative to each other in the fixed positions. In the fixed positions, it can also be said that the shaft is held immovably relative to the impacting body. Fixing the impacting body to the shaft in this way simplifies the handling of the medical impacting instrument. When the impacting body is fixed to the shaft, the user can handle the impacting instrument with only one hand without the help of the other hand and can connect the impacting instrument to a medical object, for example a pin-like fastening element. In other words, the fixing device allows, in particular, a simple one-handed operation of the medical impacting instrument.

[0006] The impaction body is preferably configured in the form of a handle, which allows the medical impaction tool to be grasped at the impaction body with one hand, in particular for coupling the medical impaction tool to a medical object, and subsequently to be handled with one hand. For this purpose, the medical impaction tool is preferably moved into a fixing position together with a fixing device.

[0007] For optimal handling, it is advantageous if the handle has an ergonomically shaped contour so that it can be held in one hand.

[0008] The impacting body in the basic position is fixed relative to the shaft and preferably adopts at least one fixed position, whereby the user can hold the impacting instrument, in particular the impacting body, with one hand, while the impacting body remains stationary relative to the distal end of the impacting instrument, and thus the impacting instrument can be coupled to the medical object in a simple manner.

[0009] Advantageously, the fixing device is configured to fix the impactor body to the shaft at the proximal stop position and / or at the distal stop position, and is therefore suitable for fixing the impactor body to the shaft not only at at least one or any number of fixing positions between the distal stop position and the proximal stop position, but also at the extreme positions of the impactor body (i.e. the proximal stop position and the distal stop position).

[0010] According to a further preferred embodiment, the locking device may be configured to be movable from the fixed position to the impacting position and from the impacting position to the fixed position, in which the impacting body is fixed to the shaft at one of the fixed positions and in which the impacting body and the shaft are movable relative to each other. This configuration allows a user to move the impacting body from the fixed position to the impacting position, in particular in order to apply a shock pulse in the distal and proximal direction at its distal end by the impacting body of the impacting instrument. In particular, the locking device may be configured such that a positive activation by the user is required not only to move the locking device from the fixed position to the impacting position but also to hold the locking device in said impacting position.

[0011] The locking device preferably comprises a return device for automatically holding the locking device in a fixed position. This arrangement has the advantage, among other things, that the impacting body is held in one of the fixed positions on the shaft without the user having to actuate the locking device in any way. Thus, among other things, unintentional and undesired movements of the impacting body relative to the shaft can be prevented.

[0012] Advantageously, the locking device is transferable from the locking position to the impact position against the action of the return device, so that the user must apply force to actuate the locking device in such a way that it is specifically transferred from the locking position to the impact position.

[0013] The restoring device can be formed in a simple manner if it comprises at least one restoring element.

[0014] If the at least one restoring element is configured in the form of a rubber-elastic or spring-elastic element, the restoring device can be produced in a simple and cost-effective manner.

[0015] The at least one restoring element is preferably configured in the form of a compression or tension spring, which makes it possible in particular to transfer the fixing device from the fixing position to the impact position by exerting a compression or tension force against the action of the at least one restoring element.

[0016] According to a further preferred embodiment, the locking device comprises at least one locking element for a force-locking and / or positive-locking engagement with both the shaft and the impactor body in at least one locking position, which allows, for example, for the locking element to be configured to be movable with respect to both the shaft and the impactor body in the impacting position, in which the at least one locking element can in particular prevent relative movements between the impactor body and the shaft, for example by engaging with both the impactor body and the shaft in a force-locking and / or positive-locking manner.

[0017] The resetting device and the impactor can be constructed in a simple manner if at least one resetting element is supported on the one hand on the locking element support surface of at least one locking element and on the other hand on the impactor body support surface of the impactor body. Such a construction in particular allows the at least one resetting element to be arranged in a protected manner inside the impactor body. Inside here means inside a circumferential surface defined by the impactor body and preferably having a constant tangent. Furthermore, it is also possible to move the locking element relative to the impactor body, in particular against the action of the at least one resetting element. For example, the impactor body can be held in one hand and the at least one locking element can be moved (e.g. displaced distally) relative to the impactor body by actuation with one finger.

[0018] Advantageously, the anchoring element support surface is configured to face in a distal direction and the impaction body support surface is configured to face in a proximal direction. Both the anchoring element support surface and the impaction body support surface may for example be configured as annular surfaces. This makes it possible in particular to use said support surfaces in cooperation with a return element in the form of a coil or helical spring.

[0019] It is preferred if the at least one locking element is movable relative to the impactor body in order to transfer the locking device from the locking position to the impactor position. In particular, the at least one locking element may be arranged or formed so as to be displaceable relative to the impactor body. For example, the at least one locking element may be movably, in particular displaceably, mounted on the impactor body. This configuration allows in particular a simple one-handed operation by a user who holds the impactor body in his hand and moves the at least one locking element with his finger (e.g. thumb) in order to transfer the locking device from the locking position to the impactor position.

[0020] If the at least one fastening element is of a sleeve-shaped configuration, the impacting body can be constructed in a simple and compact manner.

[0021] Preferably, the at least one locking element is movable distally relative to the impaction body to transition the locking device from the locked position to the impaction position, this arrangement in particular enables a user to hold the impaction body in one hand whilst pushing the at least one locking element distally with the thumb of the same hand.

[0022] Preferably, the proximal end of the at least one fixing element in the locked position does not, or does not substantially, protrude beyond the proximal end of the impacting body, which in particular makes it possible to use the impacting tool like a chisel, for example by acting with a hammer on the proximal end of the impacting body without moving the fixing element distally, thereby moving the impacting body fixed relative to the shaft into the impacting position.

[0023] In particular, in order to minimize the risk of injury, e.g. damage to the glove of the user, it is advantageous if at least one fastening element is proximally closed, in particular the proximal fastening element may be of a concave or convex curved shape facing in the proximal direction.

[0024] Advantageously, the impacting body comprises a fixing element stop device with a distal fixing element stop and a proximal fixing element stop for limiting the distal and proximal movement of the at least one fixing element. Such an arrangement facilitates handling of the impacting tool, whereby the user only has to press the at least one fixing element against the distal fixing element stop, for example, to transfer the impacting tool from the fixing position to the impacting position. The proximal fixing element stop limits the proximal movement of the at least one fixing element. In particular, the return device can press the at least one fixing element against the proximal fixing element stop in the basic position.

[0025] It is advantageous if at least one of the fixation elements comprises a fixation element perforation extending transversely, in particular perpendicularly, to the longitudinal axis, and the fixation element stop device passes through the fixation element perforation. This in particular simplifies the construction of the impaction tool. The fixation element perforation may, for example, comprise a rim or edge facing in the distal and proximal directions, which in cooperation with the fixation element stop device defines a distal fixation element stop and a proximal fixation element stop.

[0026] The distal fixation element stop is preferably arranged or formed proximally relative to the proximal fixation element stop, which allows for a particularly compact construction of the medical impaction device.

[0027] It is advantageous if the at least one fixing element is configured in the form of a clamping element and has at least one clamping arm extending in the longitudinal direction, the free end of which is configured to be movable, in particular pivotable, towards and away from the longitudinal axis of the shaft. A fixing element of this kind makes it possible to achieve clamping on the shaft in a particularly simple manner. For example, this can be achieved by forcing the free end of the at least one clamping arm towards the longitudinal axis of the shaft.

[0028] The impacting body preferably comprises a recess surrounding the shaft for receiving the at least one clamping element, which recess in particular makes it possible to pivot a free end of the at least one clamping element away from the shaft in order to release the shaft, in other words the clamping between the at least one fixing element and the shaft can thus be released.

[0029] Advantageously, the recess is at least partially delimited by a clamping surface facing towards the longitudinal axis, in which case the clamping surface in the locked position may cooperate with the at least one clamping element to prevent a free end of the at least one clamping element from moving away from the longitudinal axis or to clamp and hold the at least one clamping element in a direction towards the longitudinal axis, for example the free end of the at least one clamping element may slide on the clamping surface to transfer the impacting instrument from the impacting position to the locked position.

[0030] The clamping surface preferably expands conically in the distal direction and forms a sliding surface, by which relative movement between the free end of the at least one clamping element and the impacting body can be allowed, prevented or inhibited in a simple manner.

[0031] Advantageously, a sliding surface is formed at the free end of the clamping element, which is directed away from the longitudinal axis and inclined relative to the longitudinal axis and cooperates with a clamping surface of the impactor body. The sliding surface at the free end of the clamping element serves in particular in cooperation with the clamping surface of the impactor body to prevent unintentional jamming and thus obstruction of the fastening device.

[0032] The first inclination angle defined between the clamping surface and the longitudinal axis is preferably greater than the second inclination angle defined between the sliding surface and the longitudinal axis. The difference between the first and second inclination angles makes it possible in particular to prevent automatic locking between the fixing element and the impactor body when the impactor is in use, thereby ensuring in particular a reliable functioning of the impactor, in particular its fixing device.

[0033] According to a preferred embodiment, the impacting body may have a longitudinal through-hole extending coaxially with the longitudinal direction of the shaft, and the shaft may be configured to be at least partially housed within the longitudinal through-hole. For example, the proximal shaft portion may be fully housed within the longitudinal through-hole, regardless of the relative position of the impacting body and the shaft. The longitudinal through-hole may also simplify assembly of the impacting instrument. Thus, the impacting instrument may optionally be easily and quickly disassembled for cleaning.

[0034] It is advantageous if the shaft comprises a distal shaft part and a proximal shaft part, the proximal shaft part being housed in the longitudinal through-hole and the distal shaft part protruding distally from the longitudinal through-hole. Such a configuration makes it possible in particular to design the impactor device in such a way that the impactor body always defines the proximal end of the impactor device by its proximal end, regardless of its position relative to the shaft.

[0035] It is advantageous if an inner surface of the at least one longitudinally facing fixation element forms a guide surface for the proximal shaft part, which in particular allows the at least one fixation element to be moved in a defined manner relative to the shaft (i.e. for example relative to the proximal shaft part).

[0036] Furthermore, it may be advantageous if the longitudinal through-hole of the impactor body forms a guide surface for the at least one fastening element which faces in a direction starting from the proximal end of the impactor body towards the longitudinal axis, by means of which the at least one fastening element can be moved in a defined manner relative to the impactor body, in particular the guide surface may be configured in such a way that no jamming of the fastening element relative to the impactor body in the region of the guide surface can occur.

[0037] the proximal shaft portion includes a distal stop portion having a proximally acting first stop surface; The impactor body preferably comprises a first impactor body stop surface acting in a distal direction to engage (interact) with the first stop surface at a distal stop position. For example, the impactor instrument may be made in a simple manner with the proximal end face of the proximal shaft portion defining the first stop surface.

[0038] When the impactor body comprises a stop element defining a first impactor body stop surface, the impactor tool can be formed in a simple and compact manner. In particular, the stop element not only limits the movement of the shaft relative to the impactor body, but also the movement of the at least one fixing element relative to the impactor body.

[0039] It is advantageous if the stop element defines a stop element longitudinal axis, which extends transversely, in particular perpendicularly, to the shaft longitudinal direction, whereby the stop element can be, for example, arranged or held laterally on the impacting body.

[0040] The stop element may simply be configured in the form of a stop pin which is inserted into a transverse hole in the impactor body.

[0041] The distance from the proximal end of the impactor body to the stop element is preferably smaller than the distance from the distal end of the impactor body to the stop element, which makes it possible to maximize the stroke of the shaft, in particular of its proximal shaft portion, relative to the impactor body, in particular in the longitudinal through-hole formed in the impactor body.

[0042] The fastening element stop device preferably comprises a stop element, whereby it is possible in particular for the fastening element stop device to take on multiple functions, in this way a compact construction of the impacting tool can be achieved.

[0043] Advantageously, at least one restoring element is arranged or formed distally of the stop element, which may for example be configured in the form of a pressure element which is compressed distally by displacing the at least one fixation element.

[0044] Advantageously, the proximal shaft portion comprises a proximal stop having a second stop surface acting in the distal direction and the impactor body comprises a second impactor body stop surface acting in the proximal direction and cooperating with the second stop surface in the proximal stop position. This arrangement allows in particular a simple limitation of the movement of the impactor body relative to the shaft in the proximal direction.

[0045] In particular, if the distal boundary wall is provided with a second impactor body stop surface, a compact construction of the impactor may be achieved.

[0046] Advantageously, the first distance between the first and second stop surfaces is smaller than the second distance between the first and second impactor body stop surfaces. In particular, this arrangement allows movement of the shaft relative to the impactor body. The difference between the two distances determines the maximum stroke of the impactor body relative to the shaft.

[0047] The at least one restoring element is preferably arranged or formed around the at least one fixing element, which in particular allows a protected arrangement of the restoring element on the impacting instrument and can permanently guarantee its function.

[0048] The impactor body preferably comprises at least one flushing opening, which may in particular establish a fluid connection between the surroundings of the impactor body and its longitudinal through-hole, such that the impactor instrument may be cleaned in a simple and safe manner, in particular without disassembly.

[0049] At least one cleaning opening is preferably formed in the region of the peripheral wall of the impactor body surrounding the longitudinal axis or in the region of the distal boundary wall of the impactor body. In particular, two or more cleaning openings can be provided, i.e. for example both in the region of the peripheral wall and in the region of the distal boundary wall, so that in particular a cleaning fluid can flow through the impactor device for cleaning in order to ensure the removal of contaminants.

[0050] It is advantageous if the longitudinal through-hole penetrates the distal boundary wall and forms a guide surface for the distal shaft section in the region of the distal boundary wall. In this way, in particular, the movement of the impacting body relative to the shaft can be guided in a simple and defined manner. In particular, the guide surface can be formed in the circumferential direction. Also, the guide surface can be interrupted by at least one cleaning opening. In particular, the guide surface can be of hollow cylindrical configuration or can include a hollow cylindrical surface portion.

[0051] According to a further preferred embodiment, the impacting instrument may comprise a coupling device for a provisional (temporary) coupling to the medical object. As mentioned in the introduction, the impacting instrument may for example be coupled to a fastening element in order to eject the impacting instrument from the bone to which it is fixed. For this purpose, an impact pulse is transmitted from the impacting body to the shaft in the impacting position, i.e. when the impacting body cooperates with a proximal stop defining a proximal stop position.

[0052] Advantageously, the medical object is configured in the form of a medical implant. For example, the medical implant may be configured in the form of a medical fastening element or in the form of an implant component of a joint implant. This allows the medical impaction tool to be used in particular for fixing and detaching the medical object to a bone. Furthermore, this allows a medical system to be defined, which comprises the medical impaction tool and at least one medical object.

[0053] The coupling device preferably comprises a first coupling element configured in the coupling position for force-locking and / or positive-locking engagement with a corresponding second coupling element comprised in the medical object, the coupling device in particular enabling a simple and reliable connection of the impaction instrument to the medical object in the coupling position.

[0054] If the first coupling element is configured in the form of a coupling protrusion or a coupling receptacle, the coupling device can be formed in a simple manner. The second coupling element can be configured in the form of a coupling receptacle or a coupling protrusion corresponding to the first coupling element.

[0055] Advantageously, the coupling device comprises a fastening device for positively and / or positively locking the medical object to the medical impact instrument in the coupled position. The impact instrument can be coupled to the medical object by means of the coupling device. Independently of the coupling device, the fastening device serves to fasten the medical object to the impact instrument in the coupled position, for example against unintentional detachment. This in particular allows for a reliable handling of the impact instrument. In particular, the risk of the medical object coupled to the impact instrument falling off the impact instrument in an undesirable manner can thus be significantly reduced.

[0056] The locking device is preferably configured to be movable from a release position, in which the impaction tool and the medical object are engageable in the engagement direction, to a locking position, in which relative movement between the impaction tool and the medical object in the engagement direction or opposite to the engagement direction is prevented, in other words the locking device and the coupling device operate linearly in independent directions, whereby unintentional release of the medical object from the impaction tool is not possible, in particular unless the release force for deactivating the locking device is exceeded.

[0057] If the engagement direction extends transversely, in particular perpendicularly, to the longitudinal direction of the shaft, the impacting device can be made in a simple manner, whereby a linear and independent movement can be achieved in order to fix the medical object on the shaft in a defined manner in the coupling position, as already mentioned.

[0058] Advantageously, the fixation device comprises a fixation member which in the fixation position is in a force-locking and / or positive-locking engagement with a fixation element of the medical object, whereby the fixation member is able to fix the medical object to the shaft in the coupled position in a particularly defined manner, i.e. when the fixation member assumes the fixed position and not the released position.

[0059] The fixing member is preferably movably, in particular displaceably, mounted on the shaft, whereby a simple mechanism for fixing the medical object to the impacting device can be realized.

[0060] The locking device advantageously comprises a locking member stop against which the locking member rests in the locking position. The locking member stop may in particular serve the purpose of preventing the locking member from undesirably falling off in the distal direction from the shaft. The locking member stop therefore serves to limit the movement of the locking member in particular in the distal direction.

[0061] The fixation device can be made in a simple manner if the fixation member stopper comprises a stop surface facing in the proximal direction, in which case a distal movement of the fixation member can be prevented when the fixation member cooperates with the stop surface of the fixation member stopper.

[0062] Preferably, the fixation member comprises a fixation member shaft and a fixation member head arranged or formed on the proximal side thereof, the fixation member head being adapted to cooperate with the fixation member stop, in other words the fixation member head forms a stop or stop surface which cooperates with the fixation member stop to limit movement of the fixation member, in particular in the distal direction.

[0063] It is advantageous if the fixation member head comprises a fixation member head stop surface facing in the distal direction, which cooperates with a stop surface of the fixation member stop, whereby in particular the distal movement of the fixation member can be limited in a simple manner.

[0064] If the stop surface is configured in the form of an annular surface, the movement of the fixation member in the distal direction can be limited in a simple manner.The fixation member head stop surface may be configured in the form of an annular surface.

[0065] Furthermore, the fixing member may comprise a fixing member distal end that is engageable with the medical object, the fixing member distal end being rounded in a distal direction, whereby a risk of injury may be avoided, particularly when using the impacting instrument, and furthermore, a rounded fixing member distal end may prevent jamming with protrusions or recesses on the medical object, for example when coupling or decoupling the medical object.

[0066] The fixing device preferably comprises a biasing device for automatically moving the fixing device from the release position to the fixed position, whereby it is achieved, as a result of the biasing device, in particular that the fixing device always assumes the fixed position without the application of additional external forces. For example, by using the biasing device, the fixing device can be configured in the form of a latch connection or a snap connection, whereby a simple (in particular tool-free) coupling of the impacting device to the medical object is possible.

[0067] Advantageously, the biasing device is configured to hold the fastening member in a fixed position under a bias, so that the medical object can be fastened to the impacting instrument in the coupled position by means of the fastening device in a particularly simple and reliable manner.

[0068] The biasing device can be constructed in a simple manner if it comprises at least one biasing element.

[0069] The at least one biasing element is preferably configured in the form of a rubber-elastic or spring-elastic element, which can be manufactured in a simple and cost-effective manner, for example from a material that can be sterilized with hot steam.

[0070] Depending on the configuration of the fixation device, it may be advantageous for the biasing element to be configured in the form of a compression spring or a tension spring.

[0071] Preferably, the at least one biasing element is supported on the fixing member on the one hand and on the distally facing support surface on the other hand, such an arrangement being particularly advantageous when using a biasing element in the form of a pressure element, i.e. for example in the form of a compression spring.

[0072] The fixation device preferably comprises a support element arranged on the shaft, the support element comprising a support surface, which together with the support surface in particular forms a stop for the biasing element and thus also in particular a stop for blocking the movement of the fixation member in the proximal direction.

[0073] If the support element defines a support element longitudinal axis, which extends transversely, in particular perpendicularly, to the shaft longitudinal direction, the support element can be constructed in a simple manner.

[0074] If the support element is configured in the form of a pin inserted into a transverse hole in the shaft, the impacting device can be made in a simple and cost-effective manner: the pin can, for example, be screwed into the transverse hole or can be materially connected to the shaft, for example by gluing, soldering or welding. [Brief description of the drawings]

[0075] Preferred embodiments of the present invention are further described in conjunction with the accompanying drawings, in which:

[0076] [Figure 1] 1 is a schematic overall view, partially cut away, of an embodiment of a medical system including a medical impact instrument coupled to a medical object; [Diagram 2] FIG. 2 is a perspective view, partially cut away, of the distal end of the impaction device of FIG. 1 with the medical object separated therefrom; [Diagram 3] FIG. 2 is an exploded perspective view of the structure of FIG. 1; [Figure 4] FIG. 2 is a perspective view of the proximal end region of the impactor of FIG. 1; [Diagram 5] Cross-sectional view taken along line 5-5 in Figure 1. [Figure 6] FIG. 6 is an enlarged view of area A in FIG. 5 . [Figure 7] An enlarged view of area B in Figure 5. [Figure 8] 6 is a cross-sectional view similar to FIG. 5 when the impact device is being moved from the locked position to the released position. [Figure 9] 9 is a schematic view similar to FIG. 8 when the impactor body is moved in a distal or proximal direction relative to the shaft. [Figure 10] An enlarged view of area C in FIG. [Figure 11] FIG. 6 is a view similar to FIG. 5, where the impactor body is clamped to the shaft at any fixed position between the distal and proximal stop positions. [Figure 12] 6 is a cross-sectional view similar to FIG. 5 with the impactor body in the proximal stop position of the locked position. [Figure 13] 9 is a view similar to FIG. 8 with the impacting instrument in the impacting position and the impacting body in the proximal stop position, applying a shock pulse in the proximal direction to extract the medical object from the bone. [Figure 14] 9 is a view similar to FIG. 8 with the impacting instrument in the impacting position and prior to application of a shock pulse in the proximal direction; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0077] 1, a medical system 10 according to one embodiment is shown generally comprising a medical impact instrument 12 and a medical object 14, which will be described in more detail below.

[0078] The medical impact instrument 12 of the illustrated embodiment is in the form of an impact hammer 16. The impact hammer 16 comprises a shaft 18 defining a shaft length 20 and a proximal end 22 and a distal end 24. Disposed on the shaft 18 is an impact body 26 defining a longitudinal axis 28.

[0079] The impacting body 26 is movable (i.e., displaceable) on the shaft 18 at an impact position (i.e., between a distal stop position defined by distal stop 30 and a proximal stop position defined by proximal stop 32). This configuration allows for the transmission of a shock pulse to the distal end 24 of the shaft 18 in both distal and proximal directions.

[0080] The impactor 12 comprises a locking device 34 for provisionally (temporarily) fixing the impactor body 26 to the shaft 18 at any fixed position between a distal stop position and a proximal stop position.

[0081] The shaft 18 includes a distal shaft portion 36 and a proximal shaft portion 38 .

[0082] The shaft 18 has a longitudinal channel 40 extending therethrough from the proximal end 22 to the distal end 24 .

[0083] The outer diameter of the proximal shaft portion 38 is greater than the outer diameter of the distal shaft portion 36, thereby forming a distally facing annular surface 42 at the transition between the proximal and distal shaft portions 38, 36.

[0084] The proximal shaft portion 38 includes a distal stop 30 having a proximally acting first stop surface 44. The first stop surface 44 forms a proximal end face 46 of the shaft 18. The first stop surface 44 is annular in shape.

[0085] The proximal shaft portion 38 also includes a proximal stop 32 having a distally facing second stop surface 48. The second stop surface 48 is defined by annular surface 42.

[0086] The distal shaft portion 36 defines a side bore 50 into which a support element 52 formed by a cylindrical pin 54 is inserted. The support element 52 defines a support element longitudinal axis 56. The support element longitudinal axis 56 extends transversely (i.e., perpendicularly in the illustrated embodiment) to the shaft longitudinal direction 20. The distance from the distal end 24 to the side bore 50 approximately corresponds to the distance from the proximal end 22 of the shaft 18 to the annular surface 42.

[0087] A coupling device 58 is provided on the impactor 12, i.e. on the shaft 18, for temporary coupling to the medical object 14.

[0088] In the illustrated embodiment, the medical object 14 is in the form of a medical implant 60. Moreover, the medical implant 60 is illustrated in the form of a medical fastening element (medical fixation element) 62 by way of example. Alternatively, the medical object 14 may be in the form of an implant component of a joint implant. Here, the medical object 14 may be in the form of various kinds of shafts that can be inserted into a bone cavity or a joint cup of a ball joint.

[0089] The coupling device 58 includes a first coupling element 64 formed near the distal end 24 of the shaft 18. The first coupling element 64 is configured for force-locking and / or positive-locking engagement with a corresponding second coupling element 66 in the coupled position. In the illustrated medical system 10, the medical object 14 includes the second coupling element 66.

[0090] The first coupling element 64 includes a coupling receptacle 68 in the form of an annular groove 70 that concentrically surrounds the longitudinal axis 28 and opens radially inwardly toward the longitudinal axis 28. Disposed adjacent the distal side of the annular groove 70 is an annular flange 72 that projects radially inwardly toward the longitudinal axis 28.

[0091] The medical fastening element 62 is configured in the form of a bone pin 74. The bone pin 74 has a tip 78 at its distal end for driving into a bone 76 of the patient.

[0092] The medical fastening element 62 includes a cylindrical shaft 80. The cylindrical shaft 80 extends from the tip 78 to a proximal end of the medical fastening element 62. The proximal end of the medical fastening element 62 defines a second coupling element 66 in the form of a head 82. The head 82 defines an annular groove 84. As shown by way of example in FIG. 7, the annular groove 84 faces away from the longitudinal axis 28 (radially outward) and the annular flange 72 engages the annular groove 84 in the coupling position.

[0093] The distal shaft portion 36 is provided on one side with a chamfer 86 beginning at the distal end 24 to laterally open the mating receptacle 68, thereby allowing for lateral insertion of the head 82 into the mating receptacle 68.

[0094] The annular groove 84 is configured to define a second annular flange 88 that distally bounds the head 82 .

[0095] The head 82 and the first coupling element 64 are configured to be engageable with one another in an engagement direction 90 that extends transversely (i.e., perpendicularly in the illustrated embodiment) to the shaft longitudinal direction 20. To couple the impaction instrument 12 and the medical object 14, a shaft axis 92 defined by the shaft 80 of the bone pin 74 and the longitudinal axis 28 must be oriented parallel to one another.

[0096] Figure 1 shows the coupling position of the impacting tool 12 and the medical object 14. Figure 2 shows the bone pin 74 diagrammatically before it is coupled to the first coupling element 64 of the coupling device 58.

[0097] The coupling device 58 comprises a locking device 94 for locking the medical object 14 to the medical impactor 12 in the coupled position in a force-locking and / or positive-locking manner.

[0098] The locking device 94 is configured to be capable of being moved from a release position to a locking position, in which the medical impaction instrument 12 and the medical object 14 are engageable in an engagement direction 90. In the locking position, relative movement of the medical impaction instrument 12 and the medical object 14 relative to each other in the engagement direction 90 or opposite thereto is prevented.

[0099] The fixation device 94 comprises a fixation member 96 which, in the fixed position, is in force-locking and / or positive-locking engagement with a fixation element 98 of the medical object 14. The fixation element 98 is configured in the form of a recess 100 on the head 82. The recess 100 is open facing in a proximal direction.

[0100] Fixation member 96 includes a cylindrical fixation member shaft 102. A fixation member head 104 is disposed or formed on the proximal side of fixation member shaft 102. Fixation member head 104 forms the proximal end of fixation member 96.

[0101] The fixation member head 104 defines an outer diameter that is larger than the outer diameter of the fixation member shaft 102 such that a distally facing fixation member head stop surface 106 is formed at the transition region between the fixation member head 104 and the fixation member shaft 102.

[0102] The fixation member distal end 108 of the fixation member 96 is adapted for engagement with the medical object 14, i.e., engagement with the recess 100. The fixation member distal end 108 is rounded in the distal direction. As shown generally in Figure 7, the contours of the fixation member distal end 108 and the contours of the recess 100 match (correspond) to one another. Figure 7 shows the fixed position.

[0103] Between the distal end 24 of the shaft 18 and the cross bore 50, the inner diameter of the longitudinal channel 40 is stepped to form a fixation member stop 110. The fixation member stop 110 has a stop surface 112. The stop surface 112 faces in a proximal direction and is annular in shape. The inner diameter of the longitudinal channel 40 distal to the stop surface 112 corresponds to the outer diameter of the fixation member shaft 102. The fixation member 96 is thus movably and guideably held within the longitudinal channel 40 of the shaft 18.

[0104] A fixation member stop 110 of the fixation device 94 limits the distal movement of the fixation member 96 on the shaft 18. The fixation member 96 strikes the fixation member stop 110 at the fixation member head 104 in the fixed position. Thus, the fixation member head 104 and the fixation member stop 110 are configured to cooperate with one another. In the fixed position, the fixation member head stop surface 106 abuts against a stop surface 112. The stop surface 112 is configured in the form of an annular surface 114.

[0105] The locking device 94 comprises a biasing device 116 for automatically moving (transitioning) the locking device 94 from the released position to the locked position. In the illustrated embodiment, the biasing device 116 holds the locking member 96 in the locked position under a bias. To this end, the biasing device 116 comprises a biasing element 118. The biasing element 118 is configured as a spring-elastic element 120. In an alternative embodiment, the biasing element may be configured in the form of a rubber-elastic element.

[0106] The biasing element 118 is in the form of a compression spring 122 .

[0107] Furthermore, the biasing element 118 is supported in the distal direction on the fixing member 96, i.e. on the one hand on the conically tapered fixing member head 104 facing in the proximal direction and on the other hand on a support surface 124 acting in the distal direction. The fixing device 94 also comprises a support element 52 arranged on the shaft 18. The support element 52 has a support surface 124. The support surface 124 is the outer surface of the support element 52 facing in the distal direction.

[0108] The fixation device 94 described above is configured such that the compression spring 122 biases and holds the fixation member 96 in a distal direction.

[0109] When the head 82 of the bone pin 74 is introduced into the coupling receptacle 68 starting from the separation position shown diagrammatically in FIG. 2, the medical object 14 and the impacting instrument 12 are not engaged at all in the engagement direction 90 (i.e. transverse to the longitudinal axis 28), and the rounded fixing member distal end 108 slides on the head 82 and is moved proximally by the head 82 against the action of the biasing element 118. When the head 82 is fully received in the first coupling element 64, the compression spring 122 can retract the fixing member 96 in the distal direction, so that the fixing member distal end 108 sinks into the recess 100, thereby fixing the bone pin 74 from undesired separation from the impacting instrument 12. Thus, the above-mentioned fixing device 94 is configured in the form of a latch-type or snap-type connection device.

[0110] The impactor body 26 is configured in the form of a handle 126. The handle 126 has an outer contour 128 ergonomically shaped so that it can be held by a user in one hand 130. The ergonomic outer contour 128 comprises two annular projections 132, 134 spaced apart from one another, with an annular groove 136 formed between the two annular projections 132, 134. The outer diameter of the handle 126 tapers proximally on the proximal side of the annular projection 132 and tapers distally on the distal side of the annular projection 134. The outer contour 128 is completely rounded without any sharp corners or edges. In Figs. 8 to 10, 13 and 14, a manner in which the impactor 12 can be held by a user in one hand is shown diagrammatically.

[0111] The impactor body 26 has a longitudinal throughbore 138 extending coaxially with the shaft longitudinal direction 20. The shaft 18 is at least partially received within the longitudinal throughbore 138.

[0112] The impactor body 26 includes an annular impactor body proximal end face 140 facing proximally and an impactor body distal end face 142 facing distally.

[0113] The substantially sleeve-shaped impaction body 26 includes a peripheral wall 144 circumscribing the longitudinal axis 28 and a distal boundary wall 146 .

[0114] The longitudinal through-hole 138 passes through the distal boundary wall 146. The inner diameter of the longitudinal through-hole 138 in the region of the distal boundary wall 146 corresponds to the outer diameter of the distal shaft portion 36. In this way, in the region of the distal boundary wall 146, a guide surface 148 for the distal shaft portion 36 is formed facing radially inwards towards the longitudinal axis.

[0115] Proximal to the distal boundary wall 146, the inner diameter of the longitudinal through-bore 138 initially expands conically and then remains constant over a length region of approximately one-third of the total length of the impactor body 26. This forms a recess 150 having an inner diameter larger than the outer diameter of the distal shaft portion 36 and larger than the outer diameter of the proximal shaft portion 38. Furthermore, the inner diameter of the recess 150 tapers conically proximally, thereby forming a conical clamping surface 152. The clamping surface 152 partially bounds the recess 150, facing radially inward toward the longitudinal axis 28.

[0116] Adjacent clamping surface 152 is a hollow cylindrical section 154 of longitudinal throughbore 138. The inner diameter of hollow cylindrical section 154 is slightly larger than the outer diameter of proximal shaft portion 38, for reasons that will be explained in more detail below.

[0117] Proximally, the inner diameter of the longitudinal through-bore 138 adjacent the hollow cylindrical portion 154 widens in a stepped manner, thereby forming a proximally facing impactor body support surface 156. The impactor body support surface 156 is configured in the form of an annular surface 158. The inner diameter of the longitudinal through-bore 138 starting from the annular surface 158 and ending at the proximal end face 140 of the impactor body corresponds approximately to the inner diameter of the recess 150.

[0118] Additionally, a stop element 160 is disposed on the impactor body 26. The stop element 160 defines a stop element longitudinal axis 162 extending transversely (i.e., perpendicularly in the illustrated embodiment) to the shaft longitudinal direction 20. The stop element 160 is in the form of a stop pin 166 inserted into a transverse hole 164 in the impactor body 26.

[0119] The side hole 164 is formed proximal to the annular surface 158, i.e. the distance from the side hole 164 to the impactor body proximal end face 140 is less than the distance from the annular surface 158 to the impactor body proximal end face 140. Thus, the distance from the impactor body proximal end face 140, which defines the proximal end 168 of the impactor body 26, to the stop element 160 is less than the distance from the impactor body distal end face 142, which defines the distal end 170 of the impactor body 26, to the stop element 160.

[0120] In the following the structure and function of the fixation device 34 is defined in more detail. In the illustrated embodiment, the fixation device 34 comprises a fixation element 172 for positive-locking and / or positive-locking engagement with both the shaft 18 and the impacting body 26 at any one of the above-mentioned fixation positions between the distal stop position and the proximal stop position.

[0121] The fixing element 172 is configured in the shape of a sleeve. The inner diameter of the fixing element 172 is configured to match (correspond to) the outer diameter of the proximal shaft portion 38 such that the fixing element 172 and the proximal shaft portion 38 in the impact position are displaceable parallel to the shaft longitudinal direction 20. This also allows the fixing element 172 to be guided on the proximal shaft portion 38.

[0122] The fixation element 172 is closed on the proximal side. An occlusion element 174 is threaded onto the fixation element 172, beginning at a proximal end 176 of the fixation element 172. The occlusion element 174 has a shallow recess 178, for example, to partially accommodate a user's thumb 180 and prevent the thumb 180 from slipping out.

[0123] Fixation element 172 includes a sleeve portion 182. Sleeve portion 182 extends distally beginning at proximal end 176. A sleeve-shaped clamping element portion 186 of reduced outer diameter projects distally from an end face 184 of sleeve portion 182 such that a portion of end face 184 defines a fixation element support surface 188. Fixation element support surface 188 is annular and surrounds clamping element portion 186.

[0124] The outer diameter of clamping element portion 186 conically expands toward its distal end 190 to define a slide surface 192. Adjacent slide surface 192 is a cylindrical end 194 of clamping element portion 186. Cylindrical end 194 defines an outer diameter that is greater than the outer diameter of clamping element portion 186 proximal to slide surface 192. However, the outer diameter of cylindrical end 194 is less than the outer diameter of sleeve portion 182.

[0125] The fixing element 172 is configured in the form of a clamping element 196. Starting from the distal end 190, a number of slits 198 are formed parallel to the longitudinal axis 28. This forms a corresponding number of clamping arms 200. In the illustrated embodiment, six slits 198 are provided. The slits 198 extend to the sleeve portion 182. Due to the configuration of the cylindrical end 194, the clamping arms 200 have a thickened portion at their free ends 222. Furthermore, the remaining portion of the sliding surface 192 is formed on each clamping arm 200.

[0126] The clamping element part 186 has an outer diameter which corresponds to the inner diameter of the hollow cylindrical part 154 of the impactor body 26. The fixing element 172 is thereby guided on the impactor body 26 in the region of the hollow cylindrical part 154 by the outer surface of the clamping element part 186.

[0127] Furthermore, the fixing element 172 is formed with a fixing element bore 202. The fixing element bore 202 extends transversely (i.e. perpendicularly in the embodiment shown) to the longitudinal axis 28. The fixing element bore 202 is formed in the region of the sleeve part 182 and is formed in the form of an elongated hole parallel to the longitudinal axis 28. As can be seen, for example, in FIG. 10, the stop element 160 passes through the fixing element bore 202. The outer diameter of the stop pin 166 is smaller than the longitudinal extent of the fixing element bore 202 parallel to the longitudinal axis 28. This allows the fixing element 172 to be moved parallel to the longitudinal axis 28.

[0128] The impaction body 26 further comprises a fixation element stop 204. The fixation element stop 204 comprises a distal fixation element stop 206 and a proximal fixation element stop 208 for limiting movement of the fixation element 172 in the distal and proximal directions. In the illustrated embodiment, the distal fixation element stop 206 is disposed or formed on the fixation element 172 proximally relative to the proximal fixation element stop 208. The distal fixation element stop 206 is formed by a proximal end surface 210 at the inner periphery of the fixation element bore 202 facing in the distal direction. The proximal fixation element stop 208 is formed by a distal end surface 212 at the inner periphery of the fixation element bore 202 facing in the proximal direction.

[0129] The locking device 34 further comprises a reset device 214. The reset device 214 serves the purpose of holding the locking device 34 in the locked position.

[0130] In the locked position, the impacting body 26 is fixed in a fixed position relative to the shaft 18. Furthermore, the fixing device 34 is configured to be movable from the locked position to the impacting position and from the impacting position to the locked position. In the impacting position, the impacting body 26 and the shaft 18 are movable relative to each other. In the illustrated embodiment, the fixing device 34 is configured to be movable from the locked position to the impacting position against the action of the return device 214. Thus, in the illustrated embodiment, the fixing element 172 is configured to be movable against the action of the return device 214 to move the fixing device 34 from the locked position to the impacting position.

[0131] The restoring device 214 comprises a restoring element 216. In the illustrated embodiment, the restoring element 216 is configured in the form of a spring-elastic element 218. In an alternative embodiment, the restoring element may be configured in the form of one or more rubber-elastic elements.

[0132] In the illustrated embodiment, the return element 216 is configured in the form of a compression spring 220 .

[0133] The return element 216 is supported on the one hand on the locking element support surface 188 of the locking element 172 and on the other hand on the impactor body support surface 156 of the impactor body 26. The locking element support surface 188 faces in the distal direction and, as previously described, is configured as an annular surface. The locking element support surface 188 forms part of the end surface 184.

[0134] The return element 216 is arranged or formed around the fixing element 172. The return element 216 surrounds the fixing element 172 in the region of the clamping element portion 186. As mentioned above, the return element 216 is supported proximally on the sleeve portion 182, specifically on the end face 184 thereof.

[0135] The fixation element 172 is movable, i.e., displaceable, to transition the fixation device 34 from the locked position to the impaction position. In the illustrated embodiment, the fixation element 172 is movable in a distal direction relative to the impaction body 26 to transition the fixation device 34 from the locked position to the impaction position.

[0136] In the following, the function of the fixing device 34 will be explained.

[0137] 6 shows the locked position. The return element 216 presses the fixing element 172 by means of the distal end face 212 against the stop element, thereby limiting the movement of the fixing element 172 in the proximal direction. In this locked position, the end 194 of the clamping arm 200 is pulled back into the area of ​​the hollow cylindrical portion 154 and engages (interacts) both with the shaft 18 and with the impacting body 26 in a force-locking and / or positive-locking manner. The impacting body 26 is held clamped to the shaft 18 in this locked position.

[0138] In order to be able to move the impaction body 26 relative to the shaft 18, the fixing device 34 must be transferred from the locked position to the impaction position. For this purpose, the user can move the fixing element 172 distally, for example by pressing the blocking element 174 on the fixing element 172 with the thumb 180, against the action of the return device 214, until the proximal end face 210 of the fixing element perforation 202 hits the stop element 160. During such distal movement of the fixing element 172 relative to the impaction body 26, the cylindrical end 194 moves into the area of ​​the recess 150. Due to the larger inner diameter of the recess 150, the free end 222 of the clamping arm 200 can be pivoted away from the longitudinal axis 28 of the shaft 18. In other words, the distally displaced clamping arm 200 is no longer biased against the proximal shaft part 38 by the clamping surface 152 or the inner wall surface of the hollow cylindrical part 154. As shown diagrammatically by way of example in FIGS. 8 to 10 and also in FIGS. 13 and 14, in the impacting position the impacting body 26 is displaceable relative to the shaft 18 parallel to its longitudinal axis 28. As shown diagrammatically by way of example in FIGS.

[0139] In the locked position, the clamping surface 152 or the inner wall surface of the hollow cylindrical portion 154 prevents the free end 222 of the clamping arm 200 or the clamping element 196 from moving in a direction away from the longitudinal axis 28. This allows the clamping element 196 to be held in the locked position in a direction towards the longitudinal axis 28 for fixing, or clamping, the impactor body 26 to the shaft 18 in any fixed position, as described above.

[0140] It should also be noted that the first tilt angle 224 defined between the clamping surface 152 and the longitudinal axis 28 is greater than the second tilt angle 226 defined between the sliding surface 192 and the longitudinal axis 28 .

[0141] With the above-described configuration of the impaction instrument 12 , the inner surface 228 of the fixation element 172 facing toward the longitudinal axis 28 forms a guide surface 230 for the proximal shaft portion 38 .

[0142] Additionally, the longitudinal through-bore 138 from the proximal end of the impaction body 26 forms a guide surface 232 for the outer surface of the fixation element 172 , i.e., the sleeve portion 182 , facing in a direction toward the longitudinal axis 28 .

[0143] When the fixation device is transitioned from the locked position to the impacting position, the impacting body 26 may be moved relative to the shaft 18 such that the proximal shaft portion 38 is provided with the distal stop 30 having a first stop surface 44 acting in a proximal direction, as described above.

[0144] The impactor body 26 comprises a first impactor body stop surface 234 which cooperates with the first stop surface 44 in the distal direction. In the illustrated embodiment, the stop element 160 defines the first impactor body stop surface 234. This means that in the impactor position, the impactor body 26 can only be moved in the distal direction until the stop element 160 strikes the first stop surface 44 with the impactor body stop surface 234 and thus strikes the proximal end surface 46 of the shaft 18. Starting from this extreme position, the impactor body 26 can be moved in the proximal direction relative to the shaft 18 in the impactor position until the second impactor body stop surface 236 of the impactor body 26 strikes the second stop surface 48 and thus strikes the annular surface 42, as shown diagrammatically by way of example in FIG. 13.

[0145] The second impactor body stop surface 236 is also configured in the form of a proximally facing annular surface 238. The annular surface 238 forms a side surface of the distal boundary wall 146. The distal boundary wall 146 thus constitutes the second impactor body stop surface 236.

[0146] A first distance 240 between the first stop surface 44 and the second stop surface 48 is less than a second distance 242 between the first impactor body stop surface 234 and the second impactor body stop surface 236. The difference between the first distance 240 and the second distance 242 determines the maximum travel stroke of the impactor body 26 relative to the shaft 18.

[0147] Also, the proximal end 176 of the fixing element 172 in the locked position does not protrude, or does not substantially protrude, beyond the proximal end 168 of the impactor body 26, in order to be able to transmit an impact pulse to the distal end 24 of the impactor instrument 12 in the locked position, for example using a hammer acting on the proximal end face 140 of the impactor body 26. That is to say, the impactor instrument 12 can be used like a chisel. Thus, when the impactor body 26 in the impactor position is moved with the stop element 160 relative to the proximal end face 46, a larger impact pulse can optionally be applied to the distal end 24 than the impactor body 26.

[0148] In the case of the illustrated impactor 12, the impactor body 26 in the basic position is fixed with respect to the shaft 18 and assumes a fixed position, whereby the fixing device 34 assumes a locked position. Thus, by using the fixing device 34, the impactor body 26 can be fixed to the shaft 18 not only in fixed positions between the distal stop position and the proximal stop position, but also in the proximal and distal stop positions.

[0149] For optimal cleaning of the impactor body 12, there are provided a number of flush openings 244, 246 formed on the impactor body 26. The flush openings 244 are formed in the region of the peripheral wall 144 of the impactor body 26, and the flush openings 246 are formed in the region of the distal boundary wall 146 of the impactor body 26. The flush openings 246 are configured as extensions of the guide surface 148, only a part of which remains to guide the distal shaft portion 36 when the impactor body 26 is moved relative to the shaft 18 into the impacting position.

[0150] A cleaning opening 244 provides access to the longitudinal through-bore 138 .

[0151] Hereinafter, the use of the impact application device 12 will be briefly described with reference to FIGS.

[0152] 8, the fixation device 34 is moved to an impaction position by displacing the fixation element 172 distally to drive a bone pin 74 coupled to the distal end 24 into the patient's bone 76 as described above. The impaction body 26 together with the stop element 160 can then be moved against the first stop surface 44 to transmit an impact pulse to the bone pin 74 and drive it into the bone 76. In the impaction position, the impaction body 26 can be retracted proximally relative to the shaft 18 and then moved back again towards the first stop surface 44 to transmit an impact pulse.

[0153] The fixing device 34 allows any fixing position, i.e. any clamping, of the impactor body 26 between both stop positions, i.e. the distal stop position and the proximal stop position. Such an intermediate position, i.e. a fixing position between the distal stop position and the proximal stop position, is shown by way of example in Fig. 11, where the fixing device 34 is then in a locked position. The fixing device 34 is also shown in a locked position in Fig. 12, where the impactor body 26 is, however, in its proximal stop position.

[0154] To remove the bone pin 74 from the bone 76, the fixation device 34 is transitioned from the locked position to the impacted position and the impactor body 26 is moved such that the second impactor body stop surface 236 is moved relative to the first stop surface 44. This allows shock pulses to be applied proximally to the shaft 18 using the impactor body 26 to successively extract the bone pin 74 from the bone 76 by repeated application of such shock pulses. This is shown diagrammatically in Figures 13 and 14.

[0155] The impacting tool 12 described above allows for simple and easy connection with one hand to a medical object 14 fixed, for example, to a bone 76. By releasing the fixing element 172 and the fixing device 34 taking up the locked position, the impacting body 26 can be immovably fixed to the shaft 18 in any one of the above-mentioned fixing positions. The user can then bring the distal end 24 of the impacting tool 12 up to the medical object 14, for example to the head 82 of the bone pin 74, and couple it to the coupling element 64 in the engagement direction 90. This action is possible with only one hand, i.e. without the aid of a second hand, since the distal end 24 in the locked position is fixed to the impacting body 26, which the user holds and guides with his hand 130.

[0156] The above-described medical system 10 with the medical impaction device 12 therefore allows for improved handling compared to known medical impaction devices. [Explanation of symbols]

[0157] 10. Healthcare System 12 Medical impact devices 14 Medical Objects 16 Impact Hammer 18 Shaft 20 Shaft longitudinal direction 22 Proximal end 24 Distal end 26 Impact application body 28 Longitudinal axis 30 Distal stop 32 Proximal stop 34 Fixation device 36 Distal shaft 38 Proximal shaft 40 Longitudinal Channels 42 Annular Surface 44 1st stop surface 46 Proximal end face 48 2nd stop surface 50 Side Cave 52 Supporting elements 54 pin 56 Support element longitudinal axis 58 Coupling device 60 Medical Implants 62 Medical fastening elements 64 First Connecting Element 66 Secondary Joint Element 68 Mating Receptacle 70 Annular Groove 72 Annular flange 74 Bone Pin 76 Bones 78 Tip 80 Shaft 82 Head 84 Annular groove 86 Chamfering 88 Annular flange 90 Engagement direction 92 Shaft axis 94 Fixation device 96 Fixing member 98 Fixed elements 100 Recess 102 Fixing member shaft 104 Fixing member head 106 Fixing member head stop surface 108 Fixation member distal end 110 Fixing member stopper 112 Stopping surface 114 Annular Surface 116 Actuating device 118 Actuating element 120 Spring Elastic Element 122 Compression spring 124 Support surface 126 Handle 128 Outer contour 130 Hands 132 Annular protrusion 134 Annular protrusion 136 Circular groove 138 Longitudinal through hole 140 Impact application body proximal end surface 142 Impact application body distal end surface 144 Peripheral wall 146 Distal Boundary Wall 148 Guide Surface 150 Recess 152 Clamp surface 154 Hollow cylindrical section 156 Impact application body support surface 158 Annular Surface 160 Stopping elements 162 Stop element longitudinal axis 164 Side Cave 166 Stop Pin 168 Proximal end 170 Distal end 172 Fixed elements 174 Obstruction Elements 176 Proximal end 178 Recess 180 Thumb 182 Sleeve section 184 End face 186 Clamping element part 188 Fixed element support surface 190 Distal end 192 Slide surface 194 End 196 Clamping Elements 198 Slit 200 Clamp Arm 202 Fixed element drilling 204 Fixed element stop device 206 Distal Fixation Element Stop 208 Proximal Fixation Element Stop 210 Proximal end surface 212 Distal end surface 214 Recovery Device 216 Returning Elements 218 Spring Elastic Element 220 Compression spring 222 Free end 224 1st slope angle 226 2nd slope angle 228 Inside 230 Guideway 232 Guide Surface 234 First impact application body stop surface 236 Second impact application body stop surface 238 Circular Surface 240 1st distance 242 2nd distance 244 Cleaning opening 246 Cleaning opening

Claims

1. In particular, an impact hammer (16) type medical impact device (12), A shaft (18) that defines the longitudinal direction of the shaft (20), the proximal end (22), and the distal end (24), The system comprises an impact-applying body (26) positioned on the shaft (18) and defining a longitudinal axis (28), The impact-applying body (26) located at the impact-applying position on the shaft (18) is movable between a distal stop portion (30) that defines the distal stop position of the impact-applying body (26) and a proximal stop portion (32) that defines the proximal stop position of the impact-applying body (26) in order to transmit an impact pulse to the distal end (24) of the shaft (18) in a distal or proximal direction. The impact-applying device (12) includes a fixing device (34) for temporarily fixing the impact-applying body (26) to the shaft (18) at at least one arbitrary fixed position between the distal stop position and the proximal stop position. A medical device for applying impact.

2. The impact-applying body (26) in its basic position is fixed to the shaft (18), and adopts the at least one fixed position. The medical impact device according to claim 1.

3. The aforementioned fixing device (34) is Of the at least one of the aforementioned fixing positions, one of which is the fixing position in which the impact-applying body (26) is fixed to the shaft (18), The impact application position is such that the impact application position is movable relative to the impact application position, It is possible to transition between these two points. A medical impact-applying device according to claim 1 or 2.

4. The fixing device (34) includes a return device (214) for automatically holding the fixing device (34) in the fixed position. The medical impact device according to claim 3.

5. The fixing device (34) comprises at least one fixing element (172) for providing a forced locking engagement and / or a positive locking engagement to both the shaft (18) and the impact-applying body (26) at the at least one fixing position. A medical impact-applying device according to claim 1 or 2, characterized in that it is a medical device for applying impact.

6. The at least one fixing element (172) is configured in the form of a clamping element (196) and comprises at least one clamping arm (200) extending in the longitudinal direction of the shaft. The free end (222) of at least one clamp arm (200) is configured to be movable, particularly pivotable, in directions approaching and moving away from the longitudinal axis (28) of the impact-applying body (26). The medical impact device according to feature 5.

7. The impact-applying body (26) includes a recess (150) surrounding the shaft (18) to accommodate at least one of the clamp elements (196). The medical impact device according to claim 6.

8. The impact-applying body (26) has a longitudinal through hole (138) that extends coaxially in the longitudinal direction (20) of the shaft, The shaft (18) is at least partially housed within the longitudinal through hole (138). A medical impact-applying device according to claim 1 or 2, characterized in that it is a medical device for applying impact.

9. The shaft (18) comprises a distal shaft portion (36) and a proximal shaft portion (38), The proximal shaft portion (38) is housed in the longitudinal through hole (138), The distal shaft portion (36) protrudes from the longitudinal through hole (138) on the distal side. The medical impact device according to feature 8.

10. The fixing device (34) comprises at least one fixing element (172) for providing a forced lock engagement and / or a positive lock engagement to both the shaft (18) and the impact-applying body (26) at the at least one fixing position, The longitudinal through hole (138), which begins at the proximal end of the impact-applying body (26), is formed to have a guide surface (232) for at least one fixing element (172) facing toward the longitudinal axis (28). The medical impact device according to feature 8.

11. The shaft (18) comprises a distal shaft portion (36) and a proximal shaft portion (38), The proximal shaft portion (38) is housed in the longitudinal through hole (138), The distal shaft portion (36) protrudes from the longitudinal through hole (138) on the distal side. The proximal shaft portion (38) includes the distal stop portion (30) having a first stop surface (44) that acts in the proximal direction, The impact-applying body (26) is provided with a first impact-applying body stop surface (234) that acts in the distal direction, The first impact-applying body stopping surface (234) interacts with the first stopping surface (44) at the distal stopping position. A medical impact-applying device according to claim 10.

12. The impact-applying body (26) is provided with at least one cleaning opening (244, 246), A medical impact-applying device according to claim 1 or 2, characterized in that it is a medical device for applying impact.

13. The impact-applying device (12) is equipped with a coupling device (58) for temporarily coupling to the medical object (14). A medical impact-applying device according to claim 1 or 2, characterized in that it is a medical device for applying impact.

14. The coupling device (58) comprises a first coupling element (64), The first coupling element (64) is configured such that a forced lock engagement and / or positive lock engagement is brought to the coupling position with respect to the corresponding second coupling element (66) provided on the medical object (14). The medical impact device according to claim 13.

15. The coupling device (58) includes a fixing device (94) for fixing the medical object (14) to the impact device (12) in the coupling position in a forced locking and / or positive locking manner. The medical impact device according to claim 13.

Images