Resectoscope valve part for a manually actuatable working element of a resectoscope

Abstract

The present invention relates to a resectoscope valve part for a manually actuatable working element of a resectoscope, having a substantially cylindrical valve body that is designed such that it can be introduced into a valve seat along a longitudinal axis; a base portion arranged at the end of the valve body; an actuation portion connected to the base portion; and a sealing element arranged on the valve body and designed to axially secure the valve body in the valve seat. The invention also relates to a valve arrangement and a resectoscope.

Description

[0001] Resectoscope valve part for a manually operable working element of a resectoscope

[0002] FIELD OF THE INVENTION

[0003] The present invention relates to a resectoscope valve part for a manually operable working element of a resectoscope. Furthermore, the invention relates to a valve assembly and a resectoscope.

[0004] TECHNICAL BACKGROUND

[0005] Surgical instruments are used for a variety of applications. For example, they can be used in minimally invasive surgeries and incorporate a surgical tool. Surgical instruments can be designed as a resectoscope and incorporate a working element designed, for example, to guide the surgical tool, such as an electrode.

[0006] Resectoscopes are particularly well-known for urological or, for example, gynecological applications. The working element with the electrode can be inserted through the urethra into the patient's body to the surgical site. At a distal end (i.e., farthest from the user), the electrode has, for example, a cutting loop, by means of which tissue can be removed. The removed tissue can be removed again through an outflow channel using a rinsing fluid that is guided to the surgical site through an inflow channel. The inflow and outflow channels enable continuous rinsing, which also serves to keep a viewing window clear, ensuring a clear endoscopic view at all times.Surgical instruments generally have a handle with a carriage that is mounted for displacement along a longitudinal axis of the surgical instrument and connected to the surgical tool. When an electrode is inserted into the working element, the cutting loop of the electrode can be displaced in the axial direction by axially moving the carriage, for example, to remove tissue.

[0007] To transport the rinsing fluid and removed material from the rinsing channel or to supply rinsing fluid, at least one valve is arranged in an area near the handle. In particular, one valve is connected to the inlet channel and one valve to the outlet channel. It is also conceivable for one valve to be connected to both channels and to either supply rinsing fluid or discharge material with rinsing fluid.

[0008] For example, DE 102019 112 594 A1 discloses a surgical instrument with a manually operable working element. A valve assembly with a valve part can be operated via a lever attached to it, allowing the valve to be either opened or closed.

[0009] The surgical instrument is typically a one-handed instrument. The valve can therefore be operated via the lever from either side of the valve, i.e., from a position on the right or left side of the surgical instrument.

[0010] The lever allows the instrument to be designed for either right-handed or left-handed use.

[0011] Furthermore, the valve part can be detachable from the surgical instrument. For example, the valve assembly can be designed as a type of tap-type unit, whereby the valve part can be removed, disassembled, and cleaned. The valve part can then be reused.

[0012] SUMMARY OF THE INVENTION

[0013] Against this background, the present invention is based on the object of specifying an improved valve part or an improved valve arrangement.

[0014] According to the invention, this object is achieved by a resectoscope valve part having the features of patent claim 1, by a valve arrangement having the features of patent claim 13 and by a resectoscope having the features of patent claim 15.

[0015] Accordingly, it is provided:

[0016] A resectoscope valve part for a manually operable working element of a resectoscope, comprising a substantially cylindrical valve body which is designed to be insertable into a valve seat along a longitudinal axis, a base section arranged at the end of the valve body, an actuating section connected to the base section, and a sealing element arranged on the valve body which is designed to axially secure the valve body in the valve seat.

[0017] A valve assembly comprising a resectoscope valve part and a valve seat for receiving the valve body, wherein the valve seat has a circumferential groove on an inner surface for lockingly receiving the sealing element.

[0018] A resectoscope with a manually operable working element having a valve assembly. According to one aspect of the invention, the underlying finding of the present invention is to provide a valve component that can be replaced cost-effectively.

[0019] The idea underlying the present invention with regard to the second aspect is to design the valve part for single use. In particular, this can enable a cost-effective valve part with the possibility of axially securing the valve body in the valve seat. This is achieved in particular by a sealing element that enables a locking connection between the valve part and the valve seat.

[0020] Such a valve can also be referred to as a single-use valve. The valve component can be manufactured quickly and easily, for example, as an injection-molded part. Single-use without complex cleaning processes can offer advantages, particularly in terms of cost savings, compared to valves designed for multiple use. The sealing element is specifically designed for use as a single-use valve and simultaneously provides axial securing of the valve body in the valve seat.

[0021] A valve body is an element that can be removed from the valve seat and replaced. The valve body is, in particular, a shut-off element for a valve, preferably a rotary valve.

[0022] Preferably, the valve member is mounted horizontally in the valve seat in an installed state. Horizontal refers to a plane relative to the surgical instrument when the surgical element is held in a position ready for operation in front of the body.

[0023] The valve part can contain Makrolon, polycarbonate, polyetheretherketone (PEEK), polysulfone (OSU), polyetherimide (PEI), or a mixture of these materials. In particular, the valve part can be made of one of these materials. In a further embodiment, the valve part can contain a steel material or a ceramic material. Production can be carried out, in particular, using a metal injection molding (MIM) process for a steel material, and an injection molding process for a ceramic material.

[0024] The valve body is essentially cylindrical. This means that the valve body has a cross-section with a substantially constant diameter, particularly with respect to the longitudinal axis. The valve body is therefore not conical. Likewise, the valve body is adapted to the shape of the valve seat. All shapes that are cylindrical, taking into account any manufacturing tolerances, are essentially cylindrical, especially if they have partial recesses or openings along the longitudinal axis.

[0025] The resectoscope valve part is designed specifically for single use. In a further version, it can also be designed for multiple use.

[0026] The sealing element arranged in the valve body is preferably designed for sealing in addition to axial securing.

[0027] Advantageous embodiments and further developments emerge from the further subclaims and from the description with reference to the figures of the drawing.

[0028] When reference is made below to a valve part, this also includes the resectoscope valve part according to the invention. According to an advantageous embodiment, an actuating section connected to the base section can be provided, which has a first actuating extension designed for left-handed operation and a second actuating extension designed for right-handed operation, each of which is designed to actuate the valve body relative to the longitudinal axis.

[0029] The actuating section can have different configurations. For example, it can be designed as a straight, flat element.

[0030] The base section allows for the desired deflection of the actuating section so that it can be reached from both sides of the surgical instrument.

[0031] In particular, the valve body can be formed in one piece with the actuating section and can be designed to be detachable from the valve seat.

[0032] The actuating section is preferably oriented horizontally when the resectoscope valve part is installed in the valve seat.

[0033] The actuating section can have a length of 15 mm to 30 mm, in particular 20 mm to 26 mm, preferably 25 mm. The valve seat is preferably half as short as the actuating section.

[0034] According to an advantageous embodiment, the actuating section can have a connecting web running parallel to the longitudinal axis of the valve body, connecting the first and second actuating extensions, which is firmly connected, in particular in one piece, to the valve body via the base section. The actuating section is preferably formed in one piece with the valve body. The base section can be an end region on the valve body that provides a connecting region between the actuating section and the valve body. In this case, the actuating section is connected to the valve body in particular only on one side of the valve body. The base section is preferably a region that is not inserted into the valve seat.

[0035] According to an advantageous embodiment, the actuating section, in particular the connecting web of the actuating section, can have a greater axial length than the valve body. The valve part is preferably mounted horizontally in the valve seat in an installed state; therefore, if the actuating section runs parallel to the longitudinal axis of the valve body, the actuating section can be longer than the valve body and at the same time not hinder the valve body in a rotational movement. The valve part can be inserted into a valve seat from a left or right side, whereby right- and left-handed operation is possible in both cases.

[0036] According to an advantageous embodiment, the actuating section can be substantially U-shaped, with the first and second actuating extensions each oriented substantially transversely to the longitudinal axis of the valve body. "Substantially transverse" means that, in particular, the actuating extensions extend at an angle or angle relative to the actuating section. This provides a larger contact surface when gripping with the fingers, enabling safe and ergonomic adjustment of the valve.

[0037] According to an advantageous embodiment, the actuating section can project beyond the valve body at an end opposite the base section. If the actuating section, in particular the connecting web, projects beyond the valve body at the end opposite the base section and is simultaneously arranged on the side of the base section, the actuating section, in particular the connecting web, can be reached from both sides of the surgical instrument.

[0038] According to an advantageous embodiment, the valve body can have a through-opening oriented transversely to the longitudinal axis of the valve body, such that the valve body can be adjusted into an open or closed position by rotating the actuating section about the longitudinal axis. The rotation can be triggered and / or controlled by the actuating section. Preferably, the actuating section moves by the same angle as the through-opening is rotated, or by the same angle as the valve body. This allows an operator to see the angle of the through-opening, i.e., whether the valve is (partially) open or (partially) closed.

[0039] According to an advantageous embodiment, the sealing element for axially securing the valve body can be designed as a clamp seal, preferably as a ring seal, that can be clamped into a counter-contour in the valve seat. If the valve part is inserted laterally into the valve seat, the sealing element prevents the valve part from moving in the direction of the longitudinal axis of the valve body. This eliminates the need for a conical design of the valve body or valve seat.

[0040] According to an advantageous embodiment, the sealing element can engage in a contour, in particular an annular groove, in the valve body. The contour serves as an axial retainer, as it holds the sealing element in a desired plane or position relative to the valve body.

[0041] According to an advantageous embodiment, an extension can be arranged on the valve body, which can be slidably contacted, in particular under prestress, with an outer surface of the valve seat in such a way that a continuous adjustment to different rotational positions of the valve body is possible. The extension is preferably designed to be many times shorter than the length of the valve body. The extension can be a pin-shaped element that is arranged parallel to and spaced from a surface of the valve body at an end region of the valve body. Tension can be built up when the extension comes into contact with the valve seat in the installed state of the valve part.

[0042] According to an advantageous embodiment, the extension can be designed as a spring element that protrudes like a pin from the base portion of the valve body and is aligned substantially parallel to the longitudinal axis of the valve body. In particular, the extension is arranged on the base portion at a position opposite the actuating portion. The extension can be formed integrally with the base portion and / or the valve body. In particular, the extension contains Makrolon, polycarbonate, polyetheretherketone (PEEK), polysulfone

[0043] (OSU), polyetherimide (PEI), or a mixture of these materials. In particular, the extension can be made of one of these materials. Essentially parallel means that the extension extends in the axial direction of the valve body, taking into account any manufacturing tolerances.

[0044] According to an advantageous embodiment, the base section and the actuating section can be formed in one piece, preferably from a duromer material. The use of a duromer material enables a hard material that can withstand stress. In a further embodiment, the base section and the actuating section can be formed in multiple parts. Materials other than a duromer material are equally conceivable in all embodiments. The sealing element preferably contains a soft material, such as silicone. In particular, the sealing element can be formed from a silicone O-ring. For example, Perbunan can be used as the material. It is particularly important that the material has sufficient elasticity so that a seal can be achieved.

[0045] A one-piece valve part also offers advantages over multi-piece solutions, such as a multi-piece tap driver unit, which must be assembled and requires threaded connections.

[0046] The shape of the valve body, in particular the cylindrical shape, in combination with the sealing element can simultaneously secure the valve part in the valve seat and provide a seal.

[0047] According to an advantageous embodiment of the valve assembly, at least one locking position for the extension can be formed on an outer surface of the valve seat, so that the valve body can be locked in a rotational position by the extension between an open and a closed position, in particular formed by a stop. In a further embodiment, the stop can also be understood as a locking position.

[0048] According to an advantageous embodiment of the valve arrangement, at least two locking positions for the extension can be formed on an outer surface of the valve seat, so that the valve body can be locked in place by the extension in different rotational positions. This makes it possible to provide a valve with defined valve positions, for example, for a pressure-regulated resectoscope. The spring element allows the valve part to lock into the valve seat in defined positions.

[0049] It would also be conceivable for the spring element to be arranged on the valve seat and for defined locking positions to be arranged on the surface of the valve part.

[0050] According to a second aspect, the object underlying the invention is achieved by a valve part having the features of embodiment 1, by a valve arrangement having the features of embodiment 12 and by a resectoscope having the features of embodiment 14.

[0051] Accordingly, it is provided:

[0052] A valve part for a manually operable working element of a surgical instrument, in particular a resectoscope, with a substantially cylindrical valve body which is designed to be insertable into a valve seat along a longitudinal axis, with a base section arranged at the end of the valve body, with a sealing element arranged on the valve body and with an actuating section connected to the base section, which has a first actuating extension designed for left-handed operation and a second actuating extension designed for right-handed operation, which are each designed to actuate the valve body with respect to the longitudinal axis.

[0053] A valve assembly comprising a valve part and a valve seat for receiving the valve body, wherein the valve seat has a circumferential groove on an inner surface for lockingly receiving the sealing element. A resectoscope with a manually operable working element having a valve assembly.

[0054] According to the second aspect, an underlying insight is that right- and left-handed operation should be equally possible when closing or opening a valve on a surgical instrument. This is particularly advantageous when the surgical instrument is operated with one hand.

[0055] The underlying idea regarding the second aspect is to make the lever for actuating the valve accessible from both sides of the valve, ie from the left and right of the surgical instrument.

[0056] In contrast to known valve parts with a lever, the valve part according to the invention can be operated by the actuating section not only from one side of the valve, ie from a position on the right or left of the surgical instrument, but is designed equally for left-handed and right-handed people.

[0057] This can be achieved by the actuating section, which is designed for both left-handed and right-handed operation by the first and second actuating extensions.

[0058] This means that the surgical instrument can be used flexibly by left-handed and right-handed people without any assembly effort.

[0059] The actuating section can have different designs. For example, it can be designed as a straight, flat element. The base section can be used to deflect the actuating section as desired, allowing it to be reached from both sides of the surgical instrument.

[0060] A valve body is an element that can be removed from the valve seat and replaced. The valve body is, in particular, a shut-off element for a valve, preferably a rotary valve.

[0061] In particular, the valve body can be formed in one piece with the actuating section and can be designed to be detachable from the valve seat.

[0062] Preferably, the valve member is mounted horizontally in the valve seat when installed. The actuating portion is also preferably oriented horizontally when the valve member is installed in the valve seat. Horizontal refers to a plane relative to the surgical instrument when the surgical element is held in a position ready for operation in front of the body.

[0063] The valve part can contain Makrolon, polycarbonate, polyetheretherketone (PEEK), polysulfone (OSU), polyetherimide (PEI), or a mixture of these materials. In particular, the valve part can be made of one of these materials. In a further embodiment, the valve part can contain a steel material or a ceramic material. Production can be carried out, in particular, using a metal injection molding (MIM) process for a steel material, and an injection molding process for a ceramic material.

[0064] The actuating section can have a length of 15 mm to 30 mm, in particular 20 mm to 26 mm, preferably 25 mm.

[0065] The valve seat is preferably half as long as the actuating section. The valve body is essentially cylindrical. This means that the valve body has a cross-section with a substantially constant diameter, particularly with respect to the longitudinal axis. The valve body is therefore not conical. Likewise, the valve body is adapted to the shape of the valve seat. All shapes that are cylindrical, taking into account any manufacturing tolerances, are essentially cylindrical, especially if they have partial recesses or openings along the longitudinal axis.

[0066] The valve part is designed specifically for single use. In another version, it can also be designed for multiple use.

[0067] The sealing element arranged in the valve body is preferably designed for sealing in addition to axial securing.

[0068] According to an advantageous embodiment, the actuating section can have a connecting web running parallel to the longitudinal axis of the valve body, connecting the first and second actuating extensions, which is firmly connected, in particular in one piece, to the valve body via the base section. The actuating section is preferably formed in one piece with the valve body. The base section can be an end region on the valve body that provides a connecting region between the actuating section and the valve body. In this case, the actuating section is connected to the valve body in particular only on one side of the valve body. The base section is preferably a region that is not inserted into the valve seat.

[0069] According to an advantageous embodiment, the actuating section, in particular the connecting web of the actuating section, can have a greater axial length than the valve body. The valve part is preferably mounted horizontally in the valve seat in an installed state; therefore, if the actuating section runs parallel to the longitudinal axis of the valve body, the actuating section can be longer than the valve body and at the same time not hinder the valve body in a rotational movement. The valve part can be inserted into a valve seat from the left or right side, whereby right- and left-handed operation is possible in both cases.

[0070] According to an advantageous embodiment, the actuating section can be substantially U-shaped, with the first and second actuating extensions each oriented substantially transversely to the longitudinal axis of the valve body. "Substantially transverse" means that, in particular, the actuating extensions extend at an angle or angle relative to the actuating section. This provides a larger contact surface when gripping with the fingers, enabling safe and ergonomic adjustment of the valve.

[0071] According to an advantageous embodiment, the actuating section can project beyond the valve body at an end opposite the base section. If the actuating section, in particular the connecting web, projects beyond the valve body at the end opposite the base section and is simultaneously arranged on the side of the base section, the actuating section, in particular the connecting web, can be reached from both sides of the surgical instrument.

[0072] According to an advantageous embodiment, the valve body can have a through-opening oriented transversely to the longitudinal axis of the valve body, such that the valve body can be adjusted into an open or closed position by rotating the actuating section about the longitudinal axis. The rotation can be triggered and / or controlled by the actuating section. Preferably, the actuating section moves by the same angle as the through-opening is rotated, or by the same angle as the valve body. This allows an operator to see the angle of the through-opening, i.e., whether the valve is (partially) open or (partially) closed.

[0073] According to an advantageous embodiment, the sealing element can be designed to axially secure the valve body in the valve seat, in particular as a clamp seal that can be clamped into a counter-contour in the valve seat, preferably as a ring seal. If the valve part is inserted laterally into the valve seat, the sealing element prevents the valve part from moving in the direction of the longitudinal axis of the valve body. This eliminates the need for a conical design of the valve body or valve seat.

[0074] According to an advantageous embodiment, the sealing element can engage in a contour, in particular an annular groove, in the valve body. The contour serves as an axial retainer, as it holds the sealing element in a desired plane or position relative to the valve body.

[0075] According to an advantageous embodiment, an extension can be arranged on the valve body, which can be slidably contacted, in particular under prestress, with an outer surface of the valve seat in such a way that a continuous adjustment to different rotational positions of the valve body is possible. The extension is preferably designed to be many times shorter than the length of the valve body. The extension can be a pin-shaped element that is arranged parallel to and spaced from a surface of the valve body at an end region of the valve body. Tension can be built up when the extension comes into contact with the valve seat in the installed state of the valve part.

[0076] According to an advantageous embodiment, the extension can be designed as a spring element that projects like a pin from the base section of the valve body and is aligned substantially parallel to the longitudinal axis of the valve body. In particular, the extension is arranged on the base section at a position opposite the actuating section. The extension can be formed integrally with the base section and / or the valve body. In particular, the extension contains Makrolon, polycarbonate, polyetheretherketone (PEEK), polysulfone (OSU), polyetherimide (PEI) or a mixture of these materials. In particular, the extension can consist of one of these materials. Essentially parallel means that the extension extends in the axial direction of the valve body, taking into account any manufacturing tolerances.

[0077] According to an advantageous embodiment, the valve part can be designed for single use; in particular, the valve body, the base section, and the actuating section can be molded together as a single piece, preferably from a duromer material. Such a valve can also be referred to as a single-use valve. The valve part can, for example, be manufactured quickly and easily as an injection-molded part. Thus, single use without complex cleaning processes can offer advantages, particularly in terms of cost savings, compared to valves for multiple use. The sealing element is designed in particular for use as a single-use valve and at the same time provides axial securing of the valve body in the valve seat. The use of a duromer material enables a hard material that can withstand stress.In a further embodiment, the base section and the actuating section can be formed in multiple parts. Materials other than a thermoset material are also conceivable in all embodiments.

[0078] The sealing element preferably contains a soft material, such as silicone. In particular, the sealing element can be formed from a silicone O-ring. For example, Perbunan can be used as the material. It is particularly important that the material has sufficient elasticity to ensure a seal.

[0079] A one-piece valve part also offers advantages over multi-piece solutions, such as a multi-piece tap driver unit, which must be assembled and requires threaded connections.

[0080] The shape of the valve body, in particular the cylindrical shape, in combination with the sealing element can simultaneously secure the valve part in the valve seat and provide a seal.

[0081] According to an advantageous embodiment of the valve assembly, at least one locking position for the extension can be formed on an outer surface of the valve seat, so that the valve body can be locked in a rotational position by the extension between an open and a closed position, in particular formed by a stop. In a further embodiment, the stop can also be understood as a locking position.

[0082] According to an advantageous embodiment of the valve arrangement, at least two locking positions for the extension can be formed on an outer surface of the valve seat, so that the valve body can be locked in place by the extension in different rotational positions. This makes it possible to provide a valve with defined valve positions, for example, for a pressure-regulated resectoscope. The spring element allows the valve part to lock into the valve seat in defined positions.

[0083] It would also be conceivable for the spring element to be arranged on the valve seat and for defined locking positions to be arranged on the surface of the valve part.

[0084] The above embodiments and further developments can be combined with one another as desired, where appropriate. Further possible embodiments, further developments, and implementations of the invention also include combinations of features of the invention not explicitly mentioned above or described below with respect to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

[0085] TABLE OF CONTENTS OF THE DRAWING

[0086] The present invention is explained in more detail below with reference to the exemplary embodiments shown in the schematic figures of the drawing. They show:

[0087] Fig. 1 a surgical instrument with a valve arrangement;

[0088] Fig. 2 shows a resectoscope valve part according to an embodiment with a valve seat;

[0089] Fig. 3 is a further view of the embodiment of Fig. 2; Fig. 4 is a plan view of a resectoscope valve part;

[0090] Fig. 5 is a detailed view of Fig. 3. The accompanying drawing figures are intended to provide a further understanding of embodiments of the invention. They illustrate embodiments and, in conjunction with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the noted advantages will be apparent upon reference to the drawings. The elements of the drawings are not necessarily shown to scale relative to one another.

[0091] In the figures of the drawing, identical, functionally identical and acting elements, features and components are provided with the same reference symbols, unless otherwise stated.

[0092] DESCRIPTION OF EMBODIMENTS

[0093] Fig. 1 shows a surgical instrument in the form of a resectoscope 3 with a working element 2. A valve arrangement with two valves is arranged between the working element 2 and a handle. Each of these valves has a valve seat 4, with one valve seat 4 being arranged above and one valve seat 4 below the working element. Each of these valves can be connected to an inlet and / or an outlet 19. In the downwardly oriented valve, a valve part with a lever 20', as is known in the art, can be seen in the valve seat 4.

[0094] The two valve seats 4 shown in Fig. 1 are also suitable for receiving a resectoscope valve part 1 according to the invention. A resectoscope valve part 1 according to the invention is also designed to be arranged on other manually operable working elements 2 of surgical instruments.

[0095] Fig. 2 shows a resectoscope valve part 1 according to one embodiment and a valve seat 4. The resectoscope valve part 1 has a valve body 5, a base section 9 and an actuating section 7. With the valve body 5, the resectoscope valve part 1 is inserted horizontally along a longitudinal axis 8 into the valve seat 4. Only one possibility is shown, namely how the resectoscope valve part 1 can be inserted into the valve seat 4 from the right. It would also be conceivable for the resectoscope valve part 1 to be rotated by 180° and inserted from the left side in the illustration into the valve seat 4. In both possibilities, the actuating section 7 also has the desired function, in which case the valve seat should be designed mirrored to a vertical axis.

[0096] The valve body 5 is essentially cylindrical. A through-opening 11 is arranged in the cylindrical valve body 5, transverse to the longitudinal axis 8. By moving, ie, rotating, the actuating section 7, the orientation of the through-opening 11 can be changed. This allows the valve to be (partially) opened or (partially) closed.

[0097] The base section 9 is arranged on an end section of the valve body 5 and is designed as a connection between the actuating section 7 and the valve body 5. The base section 9 is not inserted into the valve seat 4, but remains outside when installed. Directly behind the base section 9 is a sealing element 6 designed as a circumferential ring seal. The sealing element 6 is placed in a contour 18 in the valve body 5. A counter contour 17 is arranged as a circumferential groove 12 in the valve seat 4. When installed, this allows axial securing of the valve body 5 with respect to the valve seat 4.

[0098] Furthermore, an extension 15 in the form of a pin-shaped spring element 16 is arranged on the base section 9. The extension 15 is also arranged substantially parallel to the longitudinal axis 8 and spaced apart from the sealing element 6 and the valve body 5. The extension 15 can engage in one of the three locking positions 14 formed in the valve seat 4. The locking positions 14 are arranged on an outer surface 13 of the valve seat 4 such that the resectoscope valve part 1 can be fixed in different rotational positions. This can be achieved by rotating the actuating section 7 upwards or downwards.

[0099] In an embodiment not shown, only one detent position 14 may be provided. This can be arranged centrally between two stops. One of the stops is provided, in particular, for a closed position, and one for an open position of the valve. The stops can also be referred to as detent positions.

[0100] In this embodiment, the actuating section 7 has a connecting web 7a that runs substantially parallel to the longitudinal axis 8. An actuating extension 10a, 10b is arranged at each end of the connecting web 7a, wherein the actuating extension 10a can be reached from a left position, and the actuating extension 10b from a right position relative to the surgical instrument. In this embodiment, the actuating section 7 is designed with a greater axial length than the valve body 5, so that the left position is also easily accessible.

[0101] In this embodiment, the resectoscope valve part 1 is formed in one piece and can be manufactured, for example, by an injection molding process. This makes it possible to provide a cost-effective resectoscope valve part 1 that is particularly suitable for single use. Fig. 3 shows a further view of the embodiment from Fig. 2 in a connected state. It can be seen that the base section 9 is not inserted into the valve seat 4.

[0102] Fig. 4 shows a top view of a resectoscope valve part 1.

[0103] The actuating extensions 10a, 10b have a length of, in particular, 7 to 15 mm, preferably 10 to 12 mm, especially 11 mm. The two actuating extensions 10a, 10b can be arranged at a distance (here, a horizontal distance) of 15 mm to 25 mm, in particular 20 mm to 22 mm, preferably 21 mm, measured from a central axis of the respective actuating extension 10a, 10b.

[0104] In Fig. 4, the resectoscope valve part 1 is designed in a mirror image to the embodiment according to Figures 2 and 3. In such an embodiment, the valve body 5 can be inserted into a valve seat 4 from the left side. As already shown with regard to the embodiment according to Figures 2 and 3, the actuating section 7 projects beyond the valve body 5 at an end opposite the base section 9. As a result, the resectoscope valve part 1 is designed particularly advantageously for both left-handed and right-handed operation.

[0105] Fig. 5 shows a detailed view from Fig. 3. In the sectional view, it can be seen that the resectoscope valve part 1 is inserted into the valve seat 4, and the extension 15 engages in one of the three locking positions 14. This can be seen in that the extension 15 is partially concealed by a section of the valve seat 4. Furthermore, it can be seen that the sealing element 6 engages in a contour 18 in the valve body 5 and in a counter-contour 17 in the valve seat 4. As a result, the complete resectoscope valve part 1 cannot move along the longitudinal axis 8 and is axially fixed within the valve seat 4. Although the present invention has been fully described above with reference to preferred exemplary embodiments, it is not limited thereto, but can be modified in many different ways.

[0106] For example, the number of locking positions 14 can vary. Likewise, the locking positions 14 can be arranged at different positions. Furthermore, the actuating section 7 can be designed differently from the illustrated embodiment. For example, the actuating section 7 does not have to have two actuating extensions 10 aligned essentially transversely to the longitudinal axis 8, and therefore does not have to be U-shaped. To implement the inventive idea, it is only necessary that the actuating extension 10a can be reached from one side and the actuating extension 10b from the other side of the surgical instrument when the instrument is in use during one-handed operation. In a first aspect, operability for both left- and right-handed users can be implemented.

[0107] In general, the extension allows positioning of the resectoscope valve part 1 in defined valve positions through the locking positions 14. This allows the supply or discharge of rinsing fluid to be individually adjusted.

[0108] In a further aspect, the resectoscope valve part 1, which can be inserted laterally into the valve seat 4, is held axially in the desired position by the sealing element 6. This ensures axial securing of the resectoscope valve part 1. This is also achieved by the cylindrical design of the valve body 5. In particular, this makes it possible to implement a resectoscope valve part 1 for single use, a so-called single-use valve, which can be easily assembled and disassembled. The one-piece design, which can be achieved, for example, through an injection molding process, makes it possible to provide a cost-effective resectoscope valve part 1 that is suitable for single use, has no threaded elements, requires no assembly effort, and does not require expensive cleaning.

[0109] Further embodiments may be designed as follows according to a second aspect.

[0110] The previously explained descriptions of the figures apply in the same way to the following embodiments, wherein the resectoscope valve part 1 is designed as a valve part 1', and wherein the valve part is designed for a manually operable working element 2 of a surgical instrument.

[0111] The object underlying the invention can therefore also be achieved by a valve part 1' having the following features. Reference numeral 1' denotes a general valve part, whereby reference is not made specifically to a resectoscope valve part 1, i.e., to a valve part specifically for a resectoscope, but rather to various types of valves, in particular for a wide variety of surgical instruments.

[0112] In one embodiment, a valve part 1' for a manually operable working element 2 of a surgical instrument, in particular a resectoscope 3, can be designed with: a substantially cylindrical valve body 5, which is designed to be insertable into a valve seat 4 along a longitudinal axis 8; a base section 9 arranged at the end of the valve body 5; a sealing element 6 arranged on the valve body 5; and an actuating section 7 connected to the base section 9, which has a first actuating extension 10a designed for left-handed operation and a second actuating extension 10b designed for right-handed operation, which are each designed to actuate the valve body 5 with respect to the longitudinal axis 8.

[0113] The actuating section can have different configurations. For example, it can be designed as a straight, flat element.

[0114] The base section allows for the desired deflection of the actuating section so that it can be reached from both sides of the surgical instrument.

[0115] In a further embodiment of the valve part 1', the actuating section 7 can have a connecting web 7a which runs parallel to the longitudinal axis 8 of the valve body 5 and connects the first and second actuating extensions 10a, 10b and is firmly connected, in particular in one piece, to the valve body 5 via the base section 9.

[0116] In a further embodiment of the valve part 1', the actuating section 7, in particular the connecting web 7a of the actuating section 7, can have a greater axial length than the valve body 5.

[0117] In a further embodiment of the valve part 1', the actuating section 7 can be substantially U-shaped, wherein the first and second actuating extensions 10a, 10b are each aligned substantially transversely to the longitudinal axis 8 of the valve body 5.

[0118] In a further embodiment of the valve part 1', the actuating section 7 can project beyond the valve body 5 at an end opposite the base section 9. In a further embodiment of the valve part 1', the valve body 5 can have a through-opening 11 oriented transversely to the longitudinal axis 8 of the valve body 5, so that the valve body can be adjusted into an open or closed position by rotating the actuating section 7 about the longitudinal axis 8.

[0119] In a further embodiment of the valve part 1', the sealing element 6 can be designed to axially secure the valve body 5 in the valve seat 4, in particular as a clamping seal that can be clamped into a counter contour 17 in the valve seat 4, preferably as an annular seal.

[0120] In a further embodiment of the valve part 1', the sealing element 6 can engage in a contour 18, in particular an annular groove, in the valve body 5.

[0121] In a further embodiment of the valve part 1', an extension 15 can be arranged on the valve body 5, which extension can be slidably contacted, in particular under prestress, with an outer surface of the valve seat 4 in such a way that a continuous adjustment into different rotational positions of the valve body is possible.

[0122] In a further embodiment of the valve part 1', the extension 15 can be designed as a spring element 16 which is arranged in a pin-like manner on the base section 9 of the valve body 5 and is aligned substantially parallel to the longitudinal axis 8 of the valve body 5.

[0123] In a further embodiment of the valve part 1', the valve part 1 can be designed for single use, in particular the valve body 5, the base section 9 and the actuating section 7 are molded together in one piece, preferably from a duromer material. Such a valve can also be referred to as a single-use valve. The valve part can, for example, be manufactured quickly and easily as an injection-molded part. Thus, single use without complex cleaning processes can offer advantages compared to valves for multiple use, particularly in terms of cost savings. The sealing element is designed in particular for use as a single-use valve and simultaneously provides axial securing of the valve body in the valve seat.

[0124] A further embodiment shows a valve arrangement with a valve part 1 according to one of the preceding embodiments and a valve seat 4 for receiving the valve body 5, wherein the valve seat 4 has a circumferential groove 12 on an inner surface for the locking reception of the sealing element 6.

[0125] In a further embodiment of the valve arrangement, with a valve part, at least two locking positions 14 for the extension 15 can be formed on an outer surface 13 of the valve seat 4, so that the valve body 5 can be fixed in different rotational positions by the extension 15.

[0126] A further embodiment relates to a resectoscope 3, with a manually operable working element 2, which has a valve arrangement as previously described.

[0127] Accordingly, further embodiments are provided:

[0128] 1. Valve part (1) for a manually operable working element (2) of a surgical instrument, in particular a resectoscope (3), comprising: a substantially cylindrical valve body (5) which is designed to be insertable into a valve seat (4) along a longitudinal axis (8); a base section (9) arranged at the end of the valve body (5); a sealing element (6) arranged on the valve body (5); and an actuating section (7) connected to the base section (9), which has a first actuating extension (10a) designed for left-handed operation and a second actuating extension (10b) designed for right-handed operation, which are each designed to actuate the valve body (5) with respect to the longitudinal axis (8).

[0129] 2. Valve part (1) according to embodiment 1, characterized in that the actuating section (7) has a connecting web (7a) running parallel to the longitudinal axis (8) of the valve body (5), connecting the first and second actuating extensions (10a, 10b), which is firmly connected, in particular in one piece, to the valve body (5) via the base section (9).

[0130] 3. Valve part (1) according to embodiment 1 or 2, characterized in that the actuating section (7), in particular the connecting web (7a) of the actuating section (7), has a greater axial length than the valve body (5).

[0131] 4. Valve part (1) according to one of the preceding embodiments, characterized in that the actuating section (7) is substantially U-shaped, wherein the first and second actuating extensions (10a, 10b) are each aligned substantially transversely to the longitudinal axis (8) of the valve body (5).

[0132] 5. Valve part (1) according to one of the preceding embodiments, characterized in that the actuating section (7) projects beyond the valve body (5) at an end opposite the base section (9).

[0133] 6. Valve part (1) according to one of the preceding embodiments, characterized in that the valve body (5) has a through opening (11) which is aligned transversely to the longitudinal axis (8) of the valve body (5), so that the valve body can be adjusted into an open or closed position by rotating the actuating section (7) about the longitudinal axis (8).

[0134] 7. Valve part (1) according to one of the preceding embodiments, characterized in that the sealing element (6) for axially securing the valve body (5) in the valve seat

[0135] (4) is designed, in particular as a clamping seal that can be clamped into a counter contour (17) in the valve seat (4), preferably as a ring seal.

[0136] 8. Valve part (1) according to one of the preceding embodiments, characterized in that the sealing element (6) is inserted into a contour (18), in particular an annular groove, in the valve body

[0137] (5) intervenes.

[0138] 9. Valve part (1) according to one of the preceding embodiments, characterized in that an extension (15) is arranged on the valve body (5), which extension can be slidably contacted, in particular under prestress, with an outer surface of the valve seat (4) in such a way that a continuous adjustment into different rotational positions of the valve body (1) is possible. 10. Valve part (1) according to embodiment 9, characterized in that the extension (15) is designed as a spring element (16) which is arranged in a pin-like manner protruding from the base section (9) of the valve body (5) and is aligned substantially parallel to the longitudinal axis (8) of the valve body (5).

[0139] 11. Valve part (1) according to one of the preceding embodiments, characterized in that the valve part

[0140] (1) is designed for single use, in particular the valve body (5), the base section (9) and the actuating section (7) are formed in one piece with one another, preferably from a duromer material.

[0141] 12. Valve arrangement, with a valve part (1) according to one of the preceding embodiments, a valve seat (4) for receiving the valve body (5), wherein the valve seat (4) has a circumferential groove (12) on an inner surface for the locking reception of the sealing element (6).

[0142] 13. Valve arrangement according to embodiment 12, with a valve part according to one of the embodiments 9 to 11, characterized in that at least two locking positions (14) for the extension (15) are formed on an outer surface (13) of the valve seat (4), so that the valve body (5) can be fixed in different rotational positions by the extension (15).

[0143] 14. Resectoscope (3), with a manually operable working element

[0144] (2), which has a valve arrangement according to one of the embodiments 12 or 13. List of reference symbols

[0145] 1 resectoscope valve part

[0146] 2 work element

[0147] 3 Resectoscope

[0148] 4 valve seat

[0149] 5 valve body

[0150] 6 Sealing element

[0151] 7 Operating section

[0152] 7a connecting bridge

[0153] 8 Longitudinal axis

[0154] 9 Base section

[0155] 10 Actuating extension

[0156] 11 Passage opening

[0157] 12 circumferential groove

[0158] 13 Exterior surface

[0159] 14 locking position

[0160] 15 extension

[0161] 16 spring element

[0162] 17 Counter contour

[0163] 18 Contour

[0164] 19 Inlet / Outlet

Claims

PATENT CLAIMS 1. Resectoscope valve part (1) for a manually operated working element (2) of a resectoscope (3), comprising: a substantially cylindrical valve body (5) designed to be inserted into a valve seat (4) along a longitudinal axis (8); a base section (9) arranged at the end of the valve body (5); an actuating section (7) connected to the base section (9); and a sealing element (6) arranged on the valve body (5) designed to axially secure the valve body (5) in the valve seat (4).

2. Resectoscope valve part (1) according to claim 1, characterized in that the actuating section (7) has a first actuating extension (10a) designed for left-handed operation and a second actuating extension (10b) designed for right-handed operation, each of which is designed to actuate the valve body (5) with respect to the longitudinal axis (8).

3. Resectoscope valve part (1) according to one of the preceding instructions Sayings, characterized in that the actuation section (7) has a parallel to the longitudinal axis (8) of the valve body (5), the first and second Actuating extension (10a, 10b) connecting connecting bridge (7a) which is firmly, in particular in one piece, connected to the valve body (5) via the base section (9).

4. Resectoscope valve part (1) according to one of the preceding instructions Sayings characterized in that the actuating section (7), in particular the connecting web (7a) of the actuating section (7), has a greater axial length than the valve body (5).

5. Resectoscope valve part (1) according to one of the preceding instructions Sayings characterized in that the actuating section (7) is essentially U-shaped, wherein the first and second actuating extensions (10a, 10b) each substantially perpendicular to the longitudinal axis (8) of the are aligned with the valve body (5).

6. Resectoscope valve part (1) according to one of the preceding instructions Sayings characterized in that the actuating section (7) projects beyond the valve body (5) at an end opposite the base section (9).

7. Resectoscope valve part (1) according to one of the preceding instructions Pronouncements characterized in that the valve body (5) has a through-opening (11) which is oriented transversely to the longitudinal axis (8) of the valve body (5), so that the valve body can be adjusted to an open or closed position by rotating the actuating section (7) about the longitudinal axis (8).

8. Resectoscope valve part (1) according to one of the preceding instructions Sayings, characterized in that the sealing element (6) for axial securing of the valve body (5) is clampable in a counter contour (17) in the valve seat (4) A clamping seal, preferably designed as a ring seal.

9. Resectoscope valve part (1) according to one of the preceding instructions Sayings characterized by the fact that they refer to you- telement (6) into a contour (18), in particular annular groove, in which valve body (5) engages.

10. Resectoscope valve part (1) according to one of the preceding instructions Sayings characterized by the fact that at the Valve body (5) a projection (15) is arranged which can be slidably contacted with an outer surface of the valve seat (4), in particular under preload, in such a way that stepless adjustment to different rotational positions of the valve body (5) is possible.

11. Resectoscope valve part (1) according to claim 10, characterized in that the extension (15) is designed as a spring element (16) which is arranged pin-like projecting on the base section (9) of the valve body (5) and is oriented substantially parallel to the longitudinal axis (8) of the valve body (5).

12. Resectoscope valve part (1) according to one of the preceding instructions Prosecution devices characterized in that the valve body (5) and the base section (9), and in particular the actuating section (7), are formed in one piece, preferably from a thermoset material.

13. Valve arrangement, comprising a resectoscope valve part (1) according to one of the preceding Claims, a valve seat (4) for receiving the valve body (5), wherein the valve seat (4) has a circumferential groove (12) on an inner surface for snapping the sealing element (6).

14. Valve arrangement according to claim 13, with a resectoscope valve part (1) according to one of claims 10 to 12, characterized in that at least two detent positions (14) for the extension (15) are formed on an outer surface (13) of the valve seat (4), such that the valve body (5) through the extension (15) in different rotations Positions can be fixed in a ratchet pattern.

15. Resectoscope (3), with a manually operated working element (2) which is a valve arrangement according to one of the claims 13 or 14.

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