Surgical shaft instrument

Abstract

Surgical shaft instrument (1) with at least one jaw part (30) movable in at least one axis (X) by means of which a preferably forceps- or scissors-like tool is formed in a distal end region (9), comprising - a first part (10) with a first shaft section (20) arranged along a shaft axis (L), - a second part (40) with a second shaft section (50) arranged along the shaft axis (L) and a second guide means (42) arranged in the distal end region (9) and - at least one jaw part (30) arranged in the distal end region (9) on the first part (10), - wherein the at least one jaw part (30) has a first guide means (32) and is in one piece, - wherein the first part (10) and the second part (40) can be assembled in such a way that the first guide means (32) and the second guide means (42) interact in such a way that upon mutual displacement of the first shaft section (20) and the second shaft section (50), the at least one jaw part (30) is deflected about the at least one axis (X).

Description

[0001] The present invention relates to a surgical shaft instrument with at least one jaw part movable in at least one axis, by means of which a preferably forceps- or scissors-like tool is formed in a distal end region, with the features of patent claim 1. Furthermore, the present invention relates to a jaw part for a surgical shaft instrument, a first part and / or a second part for a surgical shaft instrument and an actuating device for a surgical shaft instrument.

[0002] Surgical shaft instruments are known in various designs from the prior art. Surgical shaft instruments of this type are used, for example, in minimally invasive (endoscopic) procedures. Typically, such shaft instruments comprise an elongated shaft formed along a shaft axis, at the distal end of which a movable jaw is arranged, forming a preferably forceps- or scissors-like tool. The tool can be, in particular, a forceps with one or two movable jaws, but can also be a sampler, a punch, a cutting tool, or something else.

[0003] To operate the tool, an actuating device is provided in a proximal end region of the surgical shaft instrument, which typically comprises a first and a second handle. Commonly, the first or second handle is fixed, while the other first or second handle is pivotally mounted.

[0004] The movable handles and the movable jaw of the tool are coupled via an elongated force-transmitting element that runs inside the shaft and is accommodated in a distally displaceable manner. This element can be, for example, a pull wire or a rigid push-pull rod. The force-transmitting element is axially displaced when the handle is actuated accordingly, thereby moving the tool.

[0005] Such surgical shaft instruments have proven their worth in the past, but it has been shown that their manufacturing is complex due to the multitude of components and manufacturing processes used, making them expensive. To be reused, these surgical shaft instruments must be thoroughly cleaned and sterilized after each use.

[0006] This is where the present invention comes in.

[0007] The present invention is dedicated to the task of proposing a suitably improved surgical shaft instrument which is suitable for eliminating the disadvantages mentioned with regard to the prior art.

[0008] These objects are achieved by a surgical shaft instrument having the features of patent claim 1.

[0009] The surgical shaft instrument according to the invention with the features of patent claim 1 comprises at least one jaw part which is movable in at least one axis and by means of which a preferably forceps- or scissors-like tool is formed in a distal end region.

[0010] Preferably, the surgical shaft instrument has a first part, wherein the first part comprises a first shaft section arranged along a shaft axis.

[0011] Furthermore, it is further preferred if the surgical instrument comprises a second part, wherein the second part comprises a second shaft section arranged along a shaft axis.

[0012] Furthermore, it is preferred if the surgical instrument has a jaw part which is arranged in the distal end region on the first part and if the at least one jaw part has a first guide means.

[0013] The jaw part is preferably made in one piece, i.e. monolithic.

[0014] Furthermore, the first part and the second part can preferably be releasably assembled in such a way that the first guide means and a second guide means interact in such a way that when the first shaft section is displaced relative to the second shaft section in and / or about the shaft axis, the at least one jaw part is deflected about the at least one axis.

[0015] The first shaft section and / or the second shaft section can be displaced relative to each other by rotation about the shaft axis and / or by displacement in the shaft axis.

[0016] The first shaft section and / or the second shaft section serve or serve as a force transmission element described in the introduction, by means of which the force generated during actuation of the surgical shaft instrument is transmitted from the proximal end region to the distal end region for actuating the tool.

[0017] The present invention is based on the idea of ​​proposing a surgical shaft instrument that has the smallest possible number of components and can thus be manufactured, in particular, by primary forming processes such as injection molding, 3D printing, or the like. For this purpose, the surgical shaft instrument, in particular the first part and / or the second part, is preferably designed without a pivot pin, which can significantly reduce the number of individual components and assembly steps.

[0018] The first shaft section and the second shaft section can form the shaft of the surgical shaft instrument described as a whole, at least in sections, and can connect the distal end region of the surgical shaft instrument to a proximal end region of the surgical shaft instrument.

[0019] The first shaft section and the second shaft section are arranged along the shaft axis. It should be noted at this point that the shaft axis does not necessarily have to follow a straight line. The shaft axis can also be a curved axis and follow a curve. Accordingly, the shaft can be either a straight shaft or a curved shaft.

[0020] A further development of the present invention provides that the first guide means and the second guide means form a pivot joint. The pivot joint enables rotation of the jaw part about the at least one axis. Accordingly, the pivot joint is preferably arranged coaxially with the at least one axis. To form the pivot joint, the first guide means and the second guide means interact with each other in a form-fitting manner.

[0021] A further development of the present invention provides that the first guide means and / or the second guide means comprise or comprise at least one cam. The cam is preferably cylindrical and can also be arranged coaxially to the at least one axis. During the primary forming of the jaw part, the at least one cam can be formed in a simple manner.

[0022] The at least one jaw part preferably comprises a tool section and a joint section. The tool section is designed to form the tool and includes, for example, a cutting surface, gripping surface, coagulating means, or the like. The first guide means and / or the second guide means can be arranged on the joint section.

[0023] Furthermore, it has proven advantageous if the at least one jaw part has an articulation region which is radially spaced from the at least one axis and which is connected or coupled to the first shaft section. When the first shaft section and the second shaft section are displaced relative to one another - i.e., move relative to one another - the articulation region applies a torque to the jaw part, causing the component to rotate about the at least one axis. For example, the torque opens or closes the tool formed by the at least one jaw part. Furthermore, in a non-exhaustive list, the torque can be used to open or close pliers, scissors, a punch, a coagulant, and / or a spreader.

[0024] According to a further development, the at least one jaw part can be coupled to the first shaft section via a friction bearing. The friction bearing transmits a force, in particular a compressive force, from the first shaft section to the jaw part by means of interacting friction surfaces. The two friction surfaces assume the function of a joint and enable a displacement of the at least one jaw part about the at least one axis by a relative movement. The corresponding friction surface is preferably arranged in the articulation area on the jaw part.

[0025] According to a further development, the at least one jaw part can be connected to the first shaft section via at least one spring section. The at least one spring section transmits a force, in particular a tensile or compressive force, from the first shaft section to the jaw part and is preferably a flexural joint. The at least one spring section is preferably a flexural joint. The at least one spring section can further preferably assume the function of a joint that enables displacement of the at least one jaw part about the at least one axis—in particular through a preferably elastic deformation.

[0026] Preferably, the at least one jaw part is connected to the first shaft section directly via the at least one spring section. The at least one spring section is preferably arranged on the articulation region of the jaw part. It is also advantageous if the at least one spring section protrudes from the at least one jaw part in a curved or spiral manner. The curved shape of the at least one spring section can predetermine a deflection of the spring section under a tensile or compressive force. Furthermore, the at least one spring section is preferably configured to transmit a tensile or compressive force from the first shaft section to the at least one jaw part as a torque.

[0027] For example, the jaw part can be connected to the first shaft section via a first spring section and a second spring section. The first spring section can preferably be arranged at the articulation area of ​​the jaw part, and the second spring section can be arranged adjacent to the first spring section on the jaw part, whereby a restoring force can be generated that counteracts the first spring section.

[0028] The at least one spring section preferably has a lower flexural rigidity than the first shaft section, wherein the at least one spring section and the shaft section are preferably made of the same material. Accordingly, the at least one spring section can have a smaller area moment of inertia than the shaft section.

[0029] Furthermore, a further development of the invention can provide at least one further guide means. The at least one further guide means is preferably arranged on the second part and configured to come into operative contact with the at least one spring section. The at least one further guide means is preferably arranged on the second part. In the assembled or assembled state of the surgical shaft instrument, the further guide means can be arranged adjacent to the articulation region. The at least one further guide means can support the at least one spring section, particularly during actuation of the surgical shaft instrument, in order to inhibit or limit an evasive movement of the at least one spring section designed as a solid-state joint.The at least one further guide means can correspond to the shape of the at least one spring section, whereby the at least one spring section can lie flat against the further guide means.

[0030] A further development of the present invention provides that the at least one jaw part and the first shaft section are connectable to one another, or that the at least one jaw part and the shaft section are integral. In particular, it is preferred if the jaw part and the spring section, the first shaft section and the at least one spring section, or the jaw part, the at least one spring section, and the shaft section are integral. The integrally manufactured component can be produced, in particular, by primary forming in a single manufacturing process.

[0031] Furthermore, the jaw part and the at least one spring section and / or the first shaft section and the at least one spring section can be connected to one another by a—preferably detachable—connection, for example a positive connection. For example, the positive connection can be designed in the manner of a puzzle-type plug-in connection, which is characterized by the ability to transmit both torque and tensile and compressive forces.

[0032] A further development of the present invention provides that the second guide means and / or the first guide means comprise or comprises at least one guide groove. The guide groove is preferably arranged transversely to the at least one axis and even more preferably extends in the distal end region along the shaft axis. When the first part with the at least one jaw part and the second part are assembled, the first guide means and the second guide means come into operative contact and the guide groove specifies the position of the axis of the at least one jaw part. In other words, when the first part with the at least one jaw part and the second part are assembled, the first guide means and the second guide means engage with one another and the guide groove specifies the position of the axis of the at least one jaw part.

[0033] The at least one guide groove is preferably arranged at least in sections along the orientation of the shaft axis.

[0034] The at least one guide groove is preferably arranged at least partially parallel to the shaft axis.

[0035] However, the at least one guide groove can also be arranged, at least in sections, in a spiral shape around the shaft axis. Due to the spiral design of the guide groove, for example, the at least one jaw part can perform a superimposed rotational and pivoting movement upon mutual displacement of the first shaft section and the second shaft section. The pivoting movement preferably occurs along a first axis transverse to the shaft axis, and the rotational movement along a second axis parallel to the shaft axis.

[0036] Furthermore, it has proven advantageous if the guide groove is open at the end. It is particularly preferred if the guide groove is open toward the distal end region or distal end. However, it is also possible for the guide groove to open at other outer surfaces of the surgical shaft instrument.

[0037] The first guide means and the second guide means can be inserted into one another - preferably along the orientation of the guide groove - whereby the first guide means and the second guide means are brought into operative contact.

[0038] In particular, it is preferred if the guide groove has an open end and a closed end. The closed end preferably forms an abutment for the first guide means and / or the second guide means. Furthermore, it is preferred if the guide groove has a V- or J-shaped profile. In particular, the closed end forms a notch, which, on the one hand, forms the abutment for the first and / or the second guide means and, on the other hand, secures the bearing position of the axis of the at least one jaw part.

[0039] Furthermore, it is advantageous if the first guide means, designed as a cam, or the second guide means is held in a spring-loaded manner in the other of the first and second guide means, designed as a guide groove. In particular, it is preferred if the at least one cam is arranged on the jaw part, the guide groove is formed on the second part, and the at least one spring section presses the cam into the catch in a spring-loaded manner.

[0040] A further development of the present invention provides that the second part has at least one receptacle in the distal end region, and that the at least one jaw part can be arranged in the receptacle. It is particularly advantageous if the at least one jaw part is held in the receptacle in a form-fitting manner, in particular laterally, and / or in particular in the orientation of the at least one axis.

[0041] Furthermore, it has proven advantageous if the receptacle is arranged between two cheeks in the distal end region of the second part, and if at least one of the two cheeks has the first guide means or the second guide means on the side facing the receptacle. The respective cheek preferably has a side surface facing the receptacle, wherein the first guide means or the second guide means is arranged on at least one of the opposite side surfaces. For example, it is preferred if a guide groove is arranged on each of the opposite side surfaces of the two cheeks, wherein the guide grooves are preferably arranged mirror-symmetrically or linearly symmetrically.

[0042] The at least one further guide means can be arranged in the receptacle, in particular on the side of the first and / or second guide means facing the distal end region. The at least one further guide means can also preferably protrude from the cheek into the receptacle, preferably freely.

[0043] Furthermore, it has proven advantageous if the second shaft section has a shaft receptacle formed at least in sections along the shaft axis, into which the first shaft section can be arranged entirely or at least partially.

[0044] In the simplest case, the second shaft section can, for example, be designed at least in sections as a hollow profile (e.g. a tubular profile with a concentric, rectangular, oval or other closed cross-section), wherein the first shaft section is arranged inside the hollow profile - i.e. the shaft receptacle. The second shaft section can also have a U-profile in cross-section, at least in sections, which partially encloses the shaft receptacle. The first shaft section can be inserted between two opposite legs of the second shaft section. The second shaft section can also have a hollow profile in sections and a profile with an open cross-section, in particular a U-profile, in sections.

[0045] According to a preferred embodiment of the invention, the shaft receptacle can form a mechanical lock for the positive connection between the jaw part and the at least one spring section and / or between the at least one spring section and the first shaft section. The positive connection is preferably designed as a plug-in connection, in particular in the manner of a puzzle plug-in connection, with a plug-in direction. The plug-in direction is preferably oriented transversely to the shaft axis in such a way that the shaft receptacle positively prevents the plug-in connection from becoming loose.

[0046] Preferably, the shape of the first shaft section corresponds to the shape of the shaft receptacle. The first shaft section can preferably be completely received in the shaft receptacle and can also "fill" the shaft receptacle, whereby the shaft formed by the two shaft sections and referred to as a whole has the most compact surface possible.

[0047] The shaft preferably has a round or oval cross-section. The shaft preferably has a maximum diameter or width of >=12 mm, preferably >=10 mm, even more preferably >5 mm, and particularly preferably approximately 2.5 mm. Particularly small diameters or widths of the shaft are preferred because surgical shaft instruments are preferably used in minimally invasive procedures.

[0048] According to a further development, the shaft can comprise at least one channel and / or at least one conductor. The at least one channel and / or at least one conductor can be arranged in the first part and / or the second part. The at least one channel can be used, for example, for introducing or suctioning off media. The at least one conductor can also be arranged in the at least one channel. The at least one conductor can, for example, be an optical or an electrical conductor. The electrical conductor can be provided for an electrosurgical means. The optical conductor can enable optical accessibility of the distal end region. Light can also, for example, be emitted in the distal end region in order to improve optical accessibility.

[0049] Furthermore, connection means can be provided, particularly in the proximal end region. The connection means are arranged at the end of the at least one channel and / or the at least one conductor and enable, for example, the connection of optical or electrical systems. For example, the connection means can comprise at least one electrical plug via which the coagulating means can be supplied with power. The connection means can also transmit a medium for suction or injection.

[0050] The shaft can also be cannulated according to a further development. For example, the shaft can have a cannulation along the shaft axis, preferably extending from the proximal end region to the distal end region. This enables, for example, suction or injection at the jaw part, wherein the jaw part can be perforated, fenestrated, and / or cannulated according to a further development.

[0051] A further development of the present invention provides that the first shaft section and the second shaft section are coupled by a linear guide. In particular, it is preferred if the linear guide realizes a positive connection when the first and second parts are assembled. For example, the linear guide can comprise one or more L-shaped hooks which, for example, protrude into the shaft receptacle, in particular in the direction of the distal end region. In particular, the linear guide holds the first shaft section in the shaft receptacle of the second shaft section, in particular transversely to the shaft axis, and can thus prevent unintentional falling out and / or bending and / or kinking of the first shaft section, in particular under tension / pressure.

[0052] In addition, it has proven advantageous if the shaft axis follows a straight axis or if the shaft axis follows a curved axis.

[0053] According to a further development of the present invention, the surgical shaft instrument can have an actuating device. The actuating device can be releasably attached to the shaft, referred to as a whole, in the proximal end region of the shaft. For this purpose, coupling means can be provided that can establish a releasable connection between the actuating device and the two shaft sections.

[0054] This allows, in particular, the actuating device to be reusable or replaceable. The coupling means can preferably form a plug-in coupling, with the actuating device preferably comprising a coupling socket into which plugs can be inserted.

[0055] It is preferred if the coupling means enable rotation of the first shaft section and / or the second shaft section relative to the actuating device about the shaft axis. Furthermore, it is preferred if locking means are provided by which the position of the first shaft section and / or the second shaft section relative to the actuating device can be locked about and / or in the shaft axis. For example, a detent can be provided for this purpose. The rotation can enhance ergonomics.

[0056] The actuating device comprises at least one handle, preferably two handles, designed to actuate the tool. The at least one or the respective handle can, for example, be a handle branch. The second handle can be stationary and can, for example, be fixedly or detachably connected to the first or second shaft section. The second handle can be pivotable relative to the first handle about a joint axis and can also be connected to the other of the first or second shaft section.

[0057] When the actuating device is actuated, a tensile or compressive force is applied to the first shaft section and / or the second shaft section, and the respective shaft section transmits the tensile or compressive force as a force transmission element from the proximal end region to the at least one jaw part arranged in the distal end region. The at least one jaw part is deflected accordingly about the at least one axis by the interaction of the first guide means and the second guide means.

[0058] According to a preferred development of the present invention, the first part and the first handle or the first part and the second handle are one-piece. Furthermore, it is preferred if the second part and the first handle and / or the second part and the second handle are one-piece. The first part and the associated handle and / or the second part and the associated handle can be monolithic, wherein these are preferably produced using a primary forming process. In particular, it is preferred if the first part and the associated handle and / or the second part and the associated handle are produced by injection molding or an additive process, such as 3D printing.

[0059] Furthermore, it has proven advantageous if the actuating device is made of one piece. In particular, it is preferred if the first handle and the second handle are made of one piece. For example, the first handle and the second handle can be connected to one another by a second spring portion, wherein the second spring portion preferably generates a spring force that counteracts the actuation.

[0060] Furthermore, it has proven advantageous if the surgical shaft instrument has two jaws that form the at least one tool. Each jaw can be designed to be movable along at least one axis, with the axes preferably being arranged parallel or coaxially.

[0061] The two jaw parts can each be arranged in the distal end region of the first part and / or the second part. In particular, it is preferred if at least one of the two jaw parts, preferably the two jaw parts and the first part, are integral. For example, it may be expedient if at least one of the two jaw parts is detachably arranged on the first part. This makes it possible for both jaw parts to be reworked, for example, to form cutting, punching, pliers surfaces, or the like.

[0062] It can also be advantageous if the first part and the at least two jaw parts are one piece. After the primary shaping of the first part with the at least two jaw parts, at least one of the at least two jaw parts can then preferably be elastically bent or bent apart for reworking. At least one of the at least two jaw parts can also be separated from the first part in order to carry out reworking. After reworking, the jaw parts can be moved back into their respective starting positions, bent and / or inserted. If the bending apart takes place plastically, the jaw part or the jaw parts can be bent back into their respective starting positions after reworking.

[0063] Each of the two jaw parts has a first guide means, which interacts with a second guide means. For example, each jaw part can have a first guide means designed as a cam, which engages a corresponding second guide means, for example, designed as a guide groove.

[0064] Even more preferably, the two jaw parts are each connected to the first or second shaft section by means of a spring section. The deflection of the two jaw parts about the respective at least one axis can thus occur synchronously.

[0065] However, the two jaw parts can also be operated independently of each other. For this purpose, it may be useful to provide a second first part, which is designed analogously to the first part already described in detail. The second first part can also be operated by the actuating device, and it may be useful to provide a separate handle for the second first part.

[0066] The two jaw parts can be arranged side by side in a common recess between the two cheeks, with one first guide means engaging the second guide means of one cheek and the other first guide means engaging the other second guide means of the other cheek. The respective jaw part can, in particular, rest flat against the respective cheek, and furthermore, the two jaw parts can rest flat against the other, at least in sections, preferably within the receptacle.

[0067] For the respective jaw part, at least one further guide means can be arranged in the receptacle, in particular on the side of the first and / or the second guide means facing the distal end region.

[0068] Furthermore, the present invention relates to a jaw part for a surgical shaft instrument, which has already been described above in connection with the surgical shaft instrument. The jaw part is a monolithic component and comprises at least one first guide means, by means of which the jaw part is movable in at least one axis to form a preferably forceps- or scissors-like tool.

[0069] The jaw part can have a tool section, wherein the tool section has, for example, a cutting edge, a gripping surface, e.g. a toothed gripping surface, a punch, a coagulating agent, etc.

[0070] The coagulant can, for example, form a mono- or bipolar coagulation tool.

[0071] The at least one first guide means preferably comprises at least one cam. The cam can preferably be cylindrical and, moreover, arranged coaxially with the at least one axis. Preferably, the at least one first guide means protrudes from a side surface, preferably along the axis, of the jaw part. The at least one cam can be formed in a simple manner during the primary forming of the jaw part.

[0072] The jaw part preferably also has at least one spring section. The at least one spring section can exert a force, in particular a tensile or compressive force, on the jaw part and also performs the function of a joint that enables displacement of the at least one jaw part about the at least one axis through elastic deformation.

[0073] Preferably, the jaw part and the at least one spring section are formed as one piece, i.e., monolithically. However, the jaw part and the spring section can be connected to one another, for example, by a positive connection, in particular by means of a plug-in connection. For example, the positive connection can be designed in the manner of a puzzle plug-in connection, which is characterized by the fact that both torque and tensile and compressive forces can be transmitted. However, it is also conceivable for the jaw part and the spring section to have interacting friction surfaces. A coating, a hose, or additives (e.g., adhesive or similar) can connect the jaw part and the spring section.

[0074] The spring section is preferably arranged in a linkage area on the jaw part and, more preferably, on the side opposite the tool section with respect to the at least one axis. The linkage area is radially spaced from the at least one axis, whereby a tensile or compressive force on the side of the at least one spring section facing away from the linkage area results in a torque about at least one axis, which can deflect the jaw part about the at least one axis.

[0075] The at least one spring section preferably protrudes from the at least one jaw part in a curved, arcuate, meandering, or spiral shape. The curved shape of the spring section can cause the spring section to deform under a tensile or compressive force, which promotes a rotational movement about the at least one axis. Furthermore, the spring section is preferably configured to transmit a tensile or compressive force along the shaft axis from the first shaft section to the at least one jaw part as a torque.

[0076] The jaw part can also have two or more spring sections. For example, the jaw part can have a first and a second spring section. The first spring section is preferably arranged at the articulation area on the jaw part, and the second spring section is arranged adjacent to the first spring section on the jaw part, whereby a restoring force can be generated that counteracts the first spring section.

[0077] A further aspect of the present invention relates to a first part of a surgical shaft instrument having a distal and proximal end region, wherein the first part has a first shaft section formed along a shaft axis, which extends between the distal and proximal end region and at least one jaw part as described above arranged in the distal end region on the first part, wherein the at least one jaw part has the first guide means and is in one piece.

[0078] An actuating device can be arranged in the proximal end region of the first shaft section. The actuating device can be detachably attached to the proximal end region of the first shaft section. For this purpose, coupling means can be arranged that can establish a detachable connection between the actuating device and the proximal end region of the first shaft section. This allows, for example, the actuating device to be reusable or replaceable, while the first part can be a disposable product, for example.

[0079] The actuating device comprises at least one handle which is designed for actuating the tool formed by the at least one jaw part.

[0080] When the actuating device is actuated, a tensile or compressive force is applied to the first shaft section and transmits the tensile or compressive force as a force transmission element from the proximal end region via the spring section to the at least one jaw part arranged in the distal end region.

[0081] In the distal end portion, the first part may have two or more jaws. The respective jaw is preferably configured to form the tool.

[0082] The jaw parts are preferably arranged symmetrically around the shaft axis, wherein the respective at least one axis can be parallel or coaxial.

[0083] A rigid jaw part can also be provided which is fixedly connected to the shaft section.

[0084] Furthermore, the present invention relates to a second part for a surgical shaft instrument, which has already been described above in connection with the surgical shaft instrument. The second part preferably comprises a second shaft portion and at least one second guide means.

[0085] Another aspect of the present invention relates to an actuating device for a surgical shaft instrument.

[0086] The operating device and the further developments have already been described above in connection with the surgical shaft instrument.

[0087] A further aspect of the present invention relates to a method for producing a jaw part, a first part, a second part and / or an actuating device, in particular the previously described jaw part, the first part, the second part and / or the actuating device, wherein the production is carried out by primary shaping, in particular by injection molding or an additive process.

[0088] A further aspect of the present invention relates to a method for producing a surgical shaft instrument, in particular a previously described shaft instrument, with at least one jaw part movable in at least one axis, by means of which a preferably forceps- or scissors-like tool is formed in a distal end region, wherein the surgical shaft instrument comprises a first part with a shaft section, at least one jaw part with a first guide means and a second part with a second guide means, wherein the method comprises the following method steps: - primary shaping of the jaw part and / or the first part and / or the second part; and - Assembling the jaw part, the first part and the second part in such a way that the first guide means and the second guide means interact in such a way that upon mutual displacement of the second shaft section in the shaft axis, the at least one jaw part is deflected about the at least one axis.

[0089] Furthermore, it is advantageous when implementing the process if the primary forming is carried out by casting, especially injection molding, or an additive process. Injection molding, in particular, enables cost-effective production.

[0090] A further development of the method provides that the jaw part and / or the first part and / or the second part and / or the handle are formed simultaneously and / or in one piece.

[0091] A further development of the method provides that the jaw part and / or the first part and / or the second part and / or the handle are hardened and / or annealed and / or polished at least in sections.

[0092] Furthermore, an advantageous development of the method provides that when assembling the first part together with the at least one jaw part and the second part, a positive connection is formed between the first part and the second part and / or a positive connection between the jaw part and the second part, in particular a positive connection by means of a catch.

[0093] Two exemplary embodiments are described below with reference to the accompanying drawings. They are: Fig. 1 a side view of a surgical shaft instrument with a tool formed by a jaw part in a distal end region, which can be opened and / or closed by means of an actuating device arranged in a proximal end region, Fig. 2 a partially sectioned and perspective view of the surgical shaft instrument according to Fig. 1, Fig. 3 a perspective view of the actuating device of the surgical shaft instrument according to the Fig. 1 and Fig. 2, Fig. 4 a partially sectioned view of the actuating device according to Fig. 3, Fig. 5 an enlarged detailed view of the distal end area of ​​the surgical instrument according to the Fig. 1 and Fig. 2, wherein it can be seen that the surgical shaft instrument comprises a first part with the movable jaw part and a second part, Fig. 6 a side view of the first part according to Fig. 5, Fig. 7 an enlarged view of the distal end region of the first part, Fig. 8 an enlarged and perspective view of the second part according to Fig. 5, Fig. 9 a sectioned detail view according to Fig. 8, Fig. 10 a perspective and simplified representation of a second embodiment of the surgical shaft instrument, wherein the tool is a pair of scissors or forceps and is formed by two movable jaw parts, Fig. 11 a perspective view of the distal end region of the surgical shaft instrument according to the second embodiment according to Fig. 9, Fig. 12 a side view of the first part of the surgical shaft instrument according to the Fig. 9 and Fig. 10, Fig. 13 a detailed view of the distal end region of the first part according to the Fig. 10 and Fig. 12, Fig. 14 a perspective view of the second part of the surgical shaft instrument according to the Fig. 9 and Fig. 11, Fig. 15 a further perspective view of the second part of the surgical shaft instrument according to the Fig. 10, Fig. 11 and Fig. 14, and Fig. 16 a sectional view of the second part according to the Fig. 10, Fig. 11, Fig. 14 and Fig. 15.

[0094] Identical or functionally equivalent parts or features are identified by the same reference numerals in the following detailed description of the figures. Likewise, not all identical or functionally equivalent parts or features are provided with a reference numeral in the figures.

[0095] The Fig. 1-8 show a first exemplary embodiment of a surgical shaft instrument 1.

[0096] The surgical shaft instrument 1 comprises a distal end region 9 and a proximal end region 8, wherein a tool is arranged in the distal end region 9, which tool is formed by at least one jaw part 30 movable in at least one axis X.

[0097] The surgical shaft instrument 1 can be used, for example, in minimally invasive (endoscopic) procedures. The tool 5 can be, for example, forceps, scissors, a sampler, a punch, a spreader, or an electrosurgical device, for example for coagulation.

[0098] The surgical shaft instrument 1 comprises, as the Fig. 2 can be removed, a first part 10 with the movable jaw part 30, a second part 40 and an actuating device 70.

[0099] The first part 10 with the jaw part 30 movable about the at least one axis X comprises a first shaft section 20 arranged along a shaft axis L and can, as described below with reference to the Fig. 5-9, be monolithic.

[0100] The second part 40, see Fig. 5, Fig. 8 and Fig. 9, comprises a second shaft section 50 arranged along the shaft axis L and can also be monolithic.

[0101] The actuating device 70 is described in detail in the Fig. 3 and Fig. 4. The actuating device 70 can be Fig. 2 can be detachably connected to the first part 10 and / or the second part 40, for example by means of coupling means 60, or can be monolithic with the actuating device 70.

[0102] The first shaft section 20 of the first part 10 and / or the second shaft section 50 of the second part 40 can or can be in the proximal end region 8 according to the Fig. 2 and Fig. 6 each have coupling agents 60.

[0103] The coupling means 60 of the first shaft portion 20 may comprise a head 66 and / or the coupling means 60 of the second shaft portion 50 may comprise a plug 68.

[0104] The actuating device 70 comprises a first handle 71 and a second handle 81.

[0105] The first handle 71 comprises a first leg 72 and a first handle element 73, wherein the first leg 72 can rigidly connect the first handle element 73 to a coupling socket 62 of the coupling means 60.

[0106] With reference to the Fig. 2 and Fig. 4 it can be seen that the coupling socket 62 has a through opening.

[0107] The second handle 81 comprises a second leg 82 and a second handle element 83. The second leg 82 has the second handle element 83 at one end and a coupling receptacle 64 of the coupling means 60 at its free end at the other end.

[0108] The first handle 71 and the second handle 81 can be connected by a return spring 46. The return spring 76 can be formed monolithically together with the first handle 71 and the second handle 81. The two handles 71, 81 can be held together captively by the return spring 76.

[0109] Furthermore, the first handle 71 and the second handle 81 can be inserted into one another to form a pivot joint in a joint axis Y.

[0110] The first handle 71 can have a receptacle 74 on the side of the coupling socket 62 facing the proximal end region 8, into which the free end of the second handle 81 or its leg 82 can be inserted.

[0111] In the receptacle 74 there can be at least one pivot pin 75 arranged in the pivot axis Y, wherein the pivot pin 75 is preferably arranged offset from the shaft axis L.

[0112] The free end of the second handle 81 can have a slot 84, which preferably forms an abutment 85 for the pivot pin 75 and / or a driver 65 of the coupling receptacle 64, which can preferably accommodate the head 66. The abutment 85 and the drivers 65 are arranged spaced apart from one another in the slot 84, wherein the abutment 85 can be arranged between an open side of the slot 84 and the driver 65 or on a side of the driver 65 facing away from the open side of the slot 84.

[0113] Depending on the position of the abutment 85 and the driver 65, either a tensile force or a compressive force can be generated when the actuating device 70 is actuated.

[0114] The connector 68 can, as Fig. 2 shows, be inserted into the coupling socket 62 in such a way that the head 66 penetrates the coupling socket 62 and can protrude into the receptacle 74.

[0115] Fig. 4 that the slot 84 is T-shaped and is open both to the free end of the second leg 82 and to the distal end region 9 to form the coupling receptacle 64.

[0116] The free end of the second leg 82 can be inserted into the receptacle 74 according to Fig. 2 are inserted in such a way that the head 66 and the pivot pin 75 are inserted into the slot 84.

[0117] The head 66 comes into contact with the driver 65 and the pivot pin 75 together with the abutment 85 forms the pivot joint in the joint axis Y. The slot 84 can be designed such that the pivot pin 75 engages in the abutment 85 and becomes positively engaged there.

[0118] The first part 10, the jaw part 30 and the second part 40 are described below with reference to the Fig. 5 to 9 are described in detail.

[0119] The first part 10 according to the Fig. 6 and Fig. 7 has, in the distal end region 9, at least one jaw part 30, which is pivotable about an axis X. Furthermore, the first part 10 comprises the first shaft section 20, wherein the first shaft section 20 is arranged along the shaft axis L and connects the proximal end region 8 to the distal end region 9. In the proximal end region 8, the shaft section 20 can have the previously described coupling means 60, in particular the coupling means 60 preferably designed as a head 66.

[0120] The jaw part 30 is arranged in the distal end region 9 on the first part 10 and comprises a first guide means 32.

[0121] The jaw part 30 is preferably formed in one piece, i.e. monolithic.

[0122] The jaw part 30 can also be perforated, fenestrated and / or cannulated.

[0123] The jaw part 30 can have a tool section 31, wherein the tool section 31 is arranged distally and has, for example, a cutting edge, a gripping surface, e.g. a toothed gripping surface, a punch, a coagulating agent.

[0124] The first guide means 32 comprises at least one cam 34, wherein in the illustrated embodiment, two cams 34 are provided. The respective cam 34 can preferably be cylindrical, and the two cams can preferably protrude from opposite sides of a joint section 33 of the jaw part coaxially to the at least one axis X.

[0125] The jaw part 30 further comprises a linkage region 35 radially spaced from the at least one axis X and preferably a first spring portion 36 and / or second spring portion 37, wherein the linkage region 35 is preferably connected to the first shaft portion by means of the first spring portion 36.

[0126] The first spring section 36 can transmit a tensile or compressive force in the shaft axis L from the first shaft section 20 to the jaw part 30 and forms a spring joint that enables a displacement of the jaw part 30 about the axis X as a solid-state joint by elastic deformation.

[0127] The first spring section 36 is curved or spirally from the articulation area 35 and can be as shown in the Fig. 6 and Fig. 7, encompass the joint section 33.

[0128] Due to the curved shape of the first spring portion 36, a deflection of the spring portion 36 under a tensile or compressive force can be predetermined and a tensile or compressive force can be applied by the first shaft portion 20 as a torque to the at least one jaw part 30.

[0129] Furthermore, the jaw part 30 can also be connected to the first shaft section 20 via a second spring section 37. It should be emphasized at this point that the second spring section 37 is not absolutely necessary for the function of the surgical shaft instrument 1.

[0130] The second spring section 37 also connects the jaw part 30 to the first shaft section 20, wherein the second spring section 37 is arranged on the side of the joint section 33 facing the proximal end region 8 and can generate a restoring force counteracting the first spring section 36. The second spring section 37 can, for example, as shown in the Fig. 6 and Fig. 7, can be S-shaped or meander-shaped.

[0131] The jaw part 30 and the first shaft section 20 can be made according to the embodiments in Fig. 6 and Fig. 7 be constructed in one piece, i.e. monolithically.

[0132] In the illustrated embodiment, the jaw part 30 is connected directly to the first shaft section 20 via the second spring section 37. The first spring section 36 is directly connected to the jaw part 30, and / or the first spring section 36 is connected to the first shaft section 10 by means of a detachable connection, in particular a plug connection.

[0133] This configuration can be particularly advantageous when the first part 10 is manufactured together with the jaw part 30 as a monolithic component in a primary forming process, and the tool section 31 requires reworking. Due to its S-shaped or meandering configuration, the second spring section 37 is more flexible than the first spring section 36 and allows for easy bending for reworking the jaw part 30.

[0134] The plug connection between the first spring section 36 and the first part 10 is achieved by a puzzle-like plugging together of two corresponding plugs in a plugging direction, wherein the plugging direction is preferably oriented transversely to the shaft axis L.

[0135] The first shaft section 20 can, as Fig. 6 can be removed, have one or more holding means 23 which can form a linear guide 22, 52 described later.

[0136] The holding means 23 can protrude from the first shaft section 20 as L-shaped hooks, wherein the free end of the hooks can be oriented either in the shaft axis L towards the distal end region 9 or towards the proximal end region 8.

[0137] The second part 40 can Fig. 8 and Fig. 9. The second part 40 comprises a second shaft section 50 arranged along the shaft axis L and a second guide means 42 and can furthermore have a fixed jaw part 41 in the distal end region 9 which cooperates with the jaw part 30.

[0138] The second part 40 is preferably monolithic and has - as already described above - the coupling means 60, preferably designed as a plug 68, in the proximal end region 8.

[0139] In addition, the second part 40 has a shaft receptacle 51. In the illustrated embodiment, the shaft receptacle 51 is designed in the manner of a groove and extends from the proximal end region 8 to the distal end region 9, see also Fig. 15. In the shaft receptacle 51, several holding means 53 can be arranged, which can engage with the holding means 23 of the first shaft section 20 to form the linear guide 22, 52, see Fig. 2.

[0140] The second part 40 has a receptacle 55 in the distal end region 9, in which the at least one jaw part 30 can be arranged.

[0141] The receptacle 55 is arranged between two cheeks 56 in the distal end region 9 of the second part 40. The second guide means 42, designed as a guide groove 43, are arranged on the opposite side surfaces of the cheeks 56 facing the receptacle.

[0142] The respective guide groove 43 has an open end 44 and a closed end 45. The open end is preferably arranged in the distal end region, and the closed end is offset from the open end in the shaft axis toward the proximal end.

[0143] The respective guide groove 43 has as Fig. 9, a V- or J-shaped profile. The closed end 45 of the guide groove 43 preferably forms an abutment for the first guide means 32, in particular for each of the cams 34.

[0144] The closed end 45 forms a notch which, on the one hand, forms the abutment for the first guide means 32 and, on the other hand, secures the bearing position of the axis X of the jaw part 30.

[0145] The second part 40 may comprise a further guide means 47, wherein the further guide means 47 is designed to support the first spring portion 36. The further guide means 47 may be arranged on the side of the closed end 45 facing the distal end region 9, wherein the further guide means 47 preferably corresponds to the shape of the spring portion 36.

[0146] As a result, the additional guide means 47 can form a guide path against which the first spring section 36 can preferably rest flatly. Furthermore, the additional guide means 47 is preferably arranged adjacent to the articulation area 35. The additional guide means 47 prevents deflection of the first spring section 36, and the force can be better transmitted to the articulation area 35.

[0147] The first part 10 and the second part 40 can, as shown in the Fig. 1, Fig. 2 and Fig. 5. The first guide means 32 and the second guide means 42 come into operative contact, so that upon mutual displacement of the first shaft section 20 and the second shaft section 50 along the shaft axis L, the at least one jaw part 30 is deflected about the at least one axis X.

[0148] To manufacture the surgical shaft instrument 1, the jaw part 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 is / are manufactured by a primary molding process. In particular, it is preferred if the jaw part 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 are manufactured by casting processes, in particular injection molding, preferably from a metal or a metal alloy.

[0149] After the primary forming of the jaw part 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70, the jaw part 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 can be reworked. For example, the tool section 31 of the jaw part 30 can be ground, milled, or reworked in some other way.

[0150] Assembly is achieved by inserting the first guide means 32 into the orientation of the shaft axis L. The first guide means 32 are brought into engagement with the second guide means 42. In other words, the first guide means 32, preferably designed as cams 34, are inserted into the open end 44 of the guide groove, and the first shaft section 20 is inserted into the shaft receptacle 51 of the second part 40.

[0151] During assembly or plugging, the cams 34 follow the course of the guide groove 43. The joint section 33 of the jaw part 30 is guided into the receptacle 55 and positioned between the cheeks 56, preferably with laterally supported support. Preferably, the side surfaces of the joint section 33 rest flat against the cheeks 56.

[0152] During assembly, the first shaft section 20 is placed in the shaft receptacle 51 of the second shaft section 50. The two shaft sections form a shaft 6, referred to as a whole, of the surgical shaft instrument 1.

[0153] The shaft 6 preferably has a circular or oval cross-section. Preferably, the shaft 6 has a maximum diameter D or a maximum width B of approximately 5 mm ± 2.5 mm. Particularly small diameters D ≈ 2.5 mm or widths of the shaft 6 are preferred for minimally invasive procedures.

[0154] When the first shaft section 20 is assembled into the shaft receptacle 51 of the second shaft section 50, the linear guide 22, 52 is formed, which forms a positive connection between the two shaft sections 20, 50.

[0155] The holding means 23, 53 designed as L-shaped hooks engage with one another to form the linear guide, whereby the first shaft section 20 is held in the shaft receptacle 51 of the second shaft section 50 preferably in a plane transverse to the shaft axis L and is thus prevented, for example, against unintentional falling out and / or bending and / or kinking of the first shaft section 20, in particular under tension / compression.

[0156] The first spring portion 36 can preload the first guide means 32 against the second guide means 42. In other words, the first spring portion 36 presses the cams 34 into the abutment formed in the closed end 45 of the guide groove 43, whereby the closed end 45 forms a detent for the first guide means 42 and secures the bearing position of the X-axis of the jaw part 30.

[0157] The shaft receptacle 51 can form a mechanical lock for the positive connection between the jaw part 30 and / or the first spring section 36 and / or the second spring section 37 and / or between the first spring section 36 and / or the second spring section 37 and the first shaft section 20.

[0158] As already described above, the connection can be designed as a plug-in connection, in particular in the manner of a puzzle plug-in connection, with the plug-in direction. The plug-in direction is preferably oriented transversely to the shaft axis L or the shaft receptacle 51, whereby the shaft receptacle 51 inhibits movement in the plug-in direction and secures the plug-in connection with a positive fit.

[0159] After the first part 10 with the jaw part 30 and the second part 40 are assembled, these can all be connected to an assembly by means of the coupling means 60 with the actuating device 70.

[0160] The first part 10, together with the second part 40, can be inserted in the assembled state into the coupling socket 62 of the actuating device 70 until the head 66 protrudes into the receptacle 74. Subsequently, the free end of the second leg 82 can be inserted into the receptacle 74, whereby the head 66 and the pivot pin 75 are inserted into the slot 84, the head 66 engaging the driver, and the pivot pins engaging the abutment 85.

[0161] When using the surgical shaft instrument 1, the first part 10 and the second part 40 can be displaced relative to one another along the shaft axis L, for example, by the actuating device 70. For example, depending on the choice of tool 5, the first shaft section 20 can be moved relative to the second shaft section 50 in and / or around the shaft axis L.

[0162] When the surgical shaft instrument 1 is actuated, a tensile or compressive force is applied to the first shaft section 20 and transmits the tensile or compressive force as a force transmission element from the proximal end region 8 via the first spring section 36 to the jaw part 30 arranged in the distal end region 9.

[0163] Through the interaction of the first guide means 32 and the second guide means, the at least one jaw part 30 can be deflected about the at least one axis X and the pliers, scissors, punch, holder, sampler or other tools can be actuated.

[0164] After use of the surgical shaft instrument 1, either the surgical shaft instrument 1 can be disassembled and sterilized or individual parts can be disposed of as disposable products and replaced with new ones.

[0165] The Fig. 9-16 show a second embodiment of a surgical shaft instrument 1, wherein the differences between the two exemplary embodiments relate to the design of the first part 10 and the second part 40 in the distal end region 9, which is why the differences will now only be discussed briefly.

[0166] The Fig. 9 and Fig. 10 that the surgical shaft instrument 1 comprises two jaw parts 30, wherein the respective jaw part 30 is movable about at least one axis X when the first shaft section 20 and the second shaft section 50 are displaced relative to one another.

[0167] The shaft instrument 1 shown can be, for example, scissors or forceps.

[0168] The first part 10 according to the Fig. 11 and Fig. 12 has two jaw parts 30 in the distal end region 9, each of which is pivotable about an axis X. In addition, the first part 10 comprises the first shaft section 20. The first shaft section 20 is arranged along the shaft axis L and connects the proximal end region 8 to the distal end region 9. In the proximal end region 8, the first shaft section 20 can have the previously described coupling means 60, in particular the coupling means 60 preferably designed as a head 66.

[0169] The two jaw parts 30 can preferably be arranged symmetrically, in particular axially symmetrically, about the longitudinal axis and can furthermore be arranged directly next to one another, and the two adjacent side surfaces can lie against one another as contact surfaces.

[0170] The respective jaw part 30 has a tool section 31, wherein the tool section 31 is arranged distally and, for example, according to the Fig. 9-16 illustrated embodiment have a cutting edge.

[0171] The first guide means 32 of the respective jaw part 30 comprises a cam 34. The respective cam 34 can preferably be cylindrical and is arranged on the side of the respective jaw part opposite the contact surfaces. The respective cam 34 can protrude from the joint section 33 of the jaw part coaxially with the at least one axis X. The two axes X can be arranged coaxially.

[0172] The respective jaw part 30 further comprises a linkage region 35 which is radially spaced from the at least one axis X and is connected to the first shaft section 20 via the spring section 36.

[0173] The first spring section 36 can transmit a tensile or compressive force in the shaft axis L from the first shaft section 20 to the jaw part 30 and forms a spring joint that enables a displacement of the jaw part 30 about the axis X as a solid-state joint by elastic deformation.

[0174] The spring section 36 protrudes curved or spiral from the articulation area 35 and can, as shown in the Fig. 10 and Fig. 11, encompass the joint section 33.

[0175] Due to the curved shape of the first spring portion 36, a deflection of the spring portion 36 under a tensile or compressive force can be predetermined and a tensile or compressive force can be applied by the first shaft portion 20 as a torque to the at least one jaw part 30.

[0176] The detailed representations according to the Fig. 11 and Fig. 12 shows that the respective spring section 36 of the respective jaw part 30 is connected to the first shaft section 20 by means of a plug connection. The plug connection can preferably be designed in the manner of a puzzle connection and comprises two corresponding plugs that can be plugged together in one plug-in direction.

[0177] However, it is preferred if at least one of the at least two jaw parts 30 is formed monolithically with the first part 10.

[0178] The second part 40, shown in the Fig. 14-16, is preferably monolithic and can preferably have coupling means 60 in the proximal end region 8, as already described in detail above, designed as a plug 68.

[0179] The second part 40 can have a circular or oval cross-section and can be cannulated. Furthermore, the second part 40 can have a shaft receptacle 51. In the illustrated embodiment, the shaft receptacle 51 is designed in the manner of a groove and can - as in Fig. 15 - extend from the proximal end region 8 to the distal end region 9.

[0180] The second part 40 has a receptacle 55 in the distal end region 9 into which the two jaw parts 30 can be arranged.

[0181] The receptacle 55 is arranged between two cheeks 56 in the distal end region 9 of the second part 40. The second guide means 42, designed as a guide groove 43, are arranged on the opposite side surfaces of the cheeks 56 facing the receptacle 55.

[0182] The guide grooves 43 are axially symmetrical.

[0183] The second part 40 has further guide means 47 arranged on the side surfaces of the cheeks 56 in the distal end region 9, in particular on the side of the closed end 45 of the respective guide groove 43 facing the distal end region 9. The respective further guide means 47 protrudes into the receptacle 55 and can support the first spring section 36. The shape of the further guide means 47 preferably corresponds to the shape of the spring section 36.

[0184] The first spring portion 36 can come into operative contact with the further guide means 47, in particular upon actuation of the surgical shaft instrument, wherein the further guide means 47 prevents deflection of the first spring portion 36, in particular adjacent to the articulation region 35.

[0185] The respective guide groove 43 can, as already described in detail with reference to the first embodiment and Fig. 9, have an open end 44 and a closed end 45.

[0186] The open end 44 is preferably arranged in the distal end region and the closed end is offset from the open end in the shaft axis in the direction of the proximal end.

[0187] The guide groove 43 has a V- or J-shaped course and the closed end 45 of the guide groove 43 preferably forms an abutment for the first guide means 32, in particular for one of the cams 34.

[0188] The closed end 45 forms a notch which, on the one hand, forms the abutment for the first guide means 42 and, on the other hand, secures the bearing position of the axis X of the jaw part 30.

[0189] From the Fig. 15 and Fig. 16 further shows that a connecting web 48 is arranged on the side of the second guide means 42 facing the proximal end region 8, which connects the opposing cheeks 55 to one another. The connecting web 48 can hold the two cheeks 56 together and prevent them from bending apart.

[0190] To manufacture the surgical shaft instrument 1, at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 is / are manufactured by a primary molding process. In particular, it is preferred if the at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 is / are manufactured by a casting process, in particular injection molding, preferably from a metal or a metal alloy.

[0191] After the primary forming of at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70, the at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 can be post-machined.

[0192] For example, the tool section 31 of the respective jaw part 30 can be ground, milled, or otherwise reworked. For this purpose, it may be expedient if at least one of the two jaw parts 30, preferably both jaw parts 30, are either detached from the first shaft section 20 before rework, or if at least one of the two jaw parts 30, preferably both jaw parts 30, are bent apart before rework. This should make the respective tool section 31 accessible for processing.

[0193] The first part 10 and the second part 40 can, as shown in the Fig. 9 and Fig. 10. The first guide means 32 of the two jaw parts 30 and the second guide means 42 come into operative contact. Upon mutual displacement of the first shaft section 20 and the second shaft section 50, the two jaw parts 30 are deflected about the respective axis X.

[0194] Otherwise, the assembly of the first part 10 and the second part 40 is carried out analogously to the first embodiment, which is why a separate description of this is omitted here. List of reference symbols 1 shaft instrument 5 tools 6 shaft 8 proximal end region 9 distal end area 10 first part 20 first shaft section 22 Linear guide 23 Holding devices 30 jaw part 31 Tool section 32 first guide means 33 Joint section 34 cam 35 Linkage area 36 first spring section 37 second spring section 40 second part 41 fixed jaw part 42 second guide means 43 Guide groove 44 open ending 45 closed end 47 additional management tools 48 connecting bridge 50 second shaft section 51 shaft holder 52 linear guide 53 Holding devices 55 recording 56 cheek 60 coupling agents 62 coupling socket 64 Coupling receptacle 65 Carry-on 66 ball head 68 plugs 70 Actuating device 71 first handle 72 first leg 73 first handle element 74 recording 75 pivot pins 76 Return spring 81 second handle 82 second leg 83 second handle element 84 slot 85 abutments D Diameter L shaft axis X axis Y joint axis

Claims

[1] Surgical shaft instrument (1) with at least one jaw part (30) movable in at least one axis (X) by means of which a preferably forceps- or scissors-like tool is formed in a distal end region (9), comprising - a first part (10) with a first shaft section (20) arranged along a shaft axis (L), - a second part (40) with a second shaft section (50) arranged along the shaft axis (L) and a second guide means (42) arranged in the distal end region (9) and - at least one jaw part (30) arranged in the distal end region (9) on the first part (10), - wherein the at least one jaw part (30) has a first guide means (32) and is in one piece, - wherein the first part (10) and the second part (40) can be assembled in such a way that the first guide means (32) and the second guide means (42) interact in such a way that upon mutual displacement of the first shaft section (20) and the second shaft section (50), the at least one jaw part (30) is deflected about the at least one axis (X). [2] Surgical shaft instrument (1) according to claim 1, characterized by that the first guide means (32) and the second guide means (42) form a rotary joint. [3] Surgical shaft instrument (1) according to claim 1 or 2, characterized by that the first guide means (32) comprises at least one cam (34). [4] Surgical shaft instrument (1) according to one of the preceding claims, characterized bythat the at least one jaw part (30) has an articulation region (35) which is radially spaced from the axis (X) and is connected or coupled to the first shaft section (20). [5] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the at least one jaw part (30) is connected to the shaft section (20) via at least one spring section (36). [6] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that at least one further guide means (47) is arranged, and that the at least one further guide means (47) can come into operative contact with the at least one spring section (36). [7] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the at least one jaw part (30) and the shaft section (20) are connectable or that the at least one jaw part (30) and the shaft section (20) are in one piece. [8] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the second guide means (42) comprises a guide groove (43). [9] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the guide groove (43) is open at the end. [10] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the guide groove (43) has a J-shaped course and that a closed end (45) forms an abutment for the first guide means (32). [11] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the second part (40) has at least one receptacle (55) in the distal end region (9), and that the at least one jaw part (30) can be arranged in the receptacle (55). [12] Surgical shaft instrument (1) according to one of the preceding claims, characterized bythat the receptacle (55) is arranged between two cheeks (56) and that at least one of the two cheeks (56) has the second guide means (42). [13] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the first shaft section (20) can be arranged in a shaft receptacle (51) of the second shaft section (50) which is formed at least partially along the shaft axis (L). [14] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the first part (10) and the second part (40) are coupled in the respective shaft section (20, 50) by a linear guide (22, 52). [15] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the shaft axis (L) is a curved axis or that the shaft axis (L) is a straight axis. [16] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that an actuating device (70) is provided for actuating the tool. [17] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the actuating device (70) comprises two handles (71, 81). [18] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that coupling means (60) are provided by which the actuating device (70) can be releasably fastened. [19] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the first part (10) and the first handle (71) and / or the second part (40) and the second handle (81) are in one piece. [20] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that the first handle (71) and the second handle (81) are one piece. [21] Surgical shaft instrument (1) according to one of the preceding claims, characterized by that two jaw parts (30) are provided.

Images