DE102020133500A1 - Locking ring, shaft for a surgical hand-held device and surgical hand-held device - Google Patents

Abstract

Hand-held surgical devices are used to treat body tissue from sick people. In order to carry out the treatments, the hand-held device has an elongate shaft which can be detachably fastened to a main body of the device. In known systems, an outer upper is mounted on an inner upper and the inner upper is mounted on a conveyor. Both hands of the operating person are necessary for this coupling, which proves to be very cumbersome. The invention creates a locking ring (26) for a surgical hand-held device that can be used particularly easily and flexibly. This is achieved in that at least one locking element (30, 31) of the locking ring (26) can be removed from a counterpart by reversible deformation, whereby the connection between a shaft (11) and a main body of the hand-held device can be released.

Description

The invention relates to a locking ring for the detachable connection of a shaft of a surgical hand-held device to a main body of the hand-held device according to claim 1. The invention also relates to a shaft for a surgical hand-held device according to the preamble of claim 11. Finally, the invention also relates to a surgical hand-held device the claim 14.

Surgical hand-held devices, such as resectoscopes, are used in medicine to examine or treat body tissue from sick people. A typical area of application for the hand-held devices described here is in urology. One of several examples of this is prostate resection. When used in this way, a plasma forms around a high-frequency tool, the so-called HF electrode, with which the diseased tissue can be manipulated or cut.

In order to carry out such treatments, these hand-held devices have an elongate shaft which can be detachably fastened to a main body of the device. Various working components such as a carrier for the electrode, an optic, an obturator or the like can be movably guided within the shaft. For treatment, this shaft can first be guided into the patient with a distal end, with an obturator being mounted in the shaft during insertion in order to proceed as atraumatically as possible. Various working elements can then be inserted into the socket for the subsequent examination or treatment. With an appropriate adapter, components of a cystoscope such as optical forceps and the like can also be used.

In this exemplary embodiment of a resectoscope, the main body of the hand-held device is essentially formed by a handle unit and a conveyor. For a more detailed description of these known components, reference is made to the relevant prior art. To carry out the treatment, the shaft is coupled with its proximal end to the main body or the transporter. After treatment, the components are decoupled again for cleaning or replacement of elements.

In known systems, an outer upper is mounted on an inner upper and the inner upper is mounted on a conveyor. For the coupling between the outer shaft and the inner shaft, the proximal end of the outer shaft has two lever-like latching elements on a radial border, on which mechanical pressure must be exerted at the same time in order to release the latching between the outer shaft and the inner shaft. Since both hands of the operating person are required to operate such a locking connection, this system turns out to be very cumbersome. Although other solutions can be operated with one hand, these alternative approaches make cleaning difficult.

A disadvantage of known couplings between the inner shaft and the feed dog is that the shaft locked with the feed dog cannot be rotated about its shaft axis. However, this is particularly necessary in order to be able to optimally align the working components during the treatment. The ability of the instruments to rotate is particularly important for reducing the relative movement between the outer shaft and, for example, the urethra in order to avoid tissue damage. In addition, the electrode must be rotated for tissue manipulation. If the systems are not designed to be rotatable, the outer socket is also rotated during the treatment or examination. Overall, the known systems are therefore particularly cumbersome and inflexible to handle.

The invention is based on the object of creating a locking ring, a shaft for a surgical hand-held device and a surgical hand-held device which can be used in a particularly simple and flexible manner.

A solution to this problem is described by the features of claim 1. Accordingly, a locking ring is provided for the detachable connection of a shaft of a surgical hand-held device, in particular a resectoscope, to a main body, in particular a transporter, of the surgical hand-held device, in particular the resectoscope, which ring shape can be reversibly deformed. At least one latching element of the latching ring can be detached from a counterpart by the reversible deformation, as a result of which the connection between the shaft and the main body is released. This reversibly deformable locking ring allows the surgical hand-held device or the shaft to be used in a particularly simple and flexible manner. Only a small amount of force is required to be applied to the locking ring to couple the shaft to the hand-held device. The required force can be set device-specifically or application-specifically by selecting the material and/or the shape. Due to the deformation of the locking ring, the locking connection can be released quickly and without great force. The reversibility of the ring material, preferably a plastic, allows the coupling of the stem to the main body to be restored in a similarly simple manner. About that In addition, the locking ring according to the invention allows the shank to rotate relative to the main body or the feed dog.

In particular, the invention provides that the locking ring can be fastened to the shank or the main body and that the at least one counterpart, which is preferably designed as an annular groove, is arranged on the main body or the shank. Depending on the type or design of the device, it is therefore conceivable that the locking ring according to the invention can be assigned to the main body or the shaft. The complementary counterpart is arranged correspondingly on the respective other component.

The diameter of the locking ring roughly corresponds to the diameter of the shank, although the locking ring can also be slightly larger. The width of the ring is 2 mm to 15 mm, preferably 5 mm to 10 mm. The wall thickness can be a few tenths of a millimeter or one millimeter or two or more millimeters.

Preferably, the invention can provide that at least two opposing locking elements are arranged on an inner side of the locking ring, which are aligned with a ring axis running perpendicularly through the locking ring. These locking elements can represent a radial thickening. Equally, these latching elements can also be designed as jagged or tooth-like projections. The locking elements are aligned with a center point of the locking ring. It is also conceivable for the inside of the locking ring to be assigned a multiplicity of locking elements or a single continuous ring-section-like locking element. In all cases, the latching elements are designed in such a way that a mechanically resilient coupling can be produced between the shaft and the main body.

Provision can preferably also be made for at least one operating element to be arranged on an outside of the locking ring, with the locking ring being reversibly deformable by the action of force on this operating element. Due to the radial force acting on this operating element, the two opposing locking elements move radially outwards. After the end of the application of force, the operating unit moves back to its starting position due to the reversibility of the locking ring, whereby the two locking elements also move back to their original position. The radial movements of the control element and the locking elements are thus coupled in opposite directions. If the operating element is pressed in the direction of the center of the ring, the two locking elements move away from this point. When the operating element moves away from the center point, the two latching elements move towards one another again. Since this operating element of the locking ring can be operated with a single finger, preferably the thumb or index finger, the overall handling of the object according to the invention is very advantageous.

The at least one operating element is positioned on the ring axis. The ring axis and an axis which runs parallel to a ring plane and through the latching elements form a right angle. This relative orientation of the control element and the locking elements allows the locking elements to be moved outwards and thus cancel the coupling by exerting only a slight force on the control element.

Furthermore, it can be provided according to the invention that the locking ring can be connected, preferably screwed, clamped or latched, to a wall section opposite the operating element on the shaft or the main body. As a result of this connection, which is in particular detachable, the locking ring experiences a counterforce when the force is applied. Due to the fact that the locking ring is fixedly connected to the shaft or the main body with a wall section opposite the operating element, the application of force turns out to be particularly efficient for the deformation of the ring. The detachable connection makes it particularly easy to replace the ring in the event of damage or for cleaning purposes.

1. a) Die Breite der Öffnung parallel zur Schaftachse ist durch die Größe des Führungselements bestimmt. In diese Richtung besteht möglichst wenig Spiel.
2. b) Die Höhe der Öffnung parallel zur Ringachse ergibt sich durch die maximale Deformierung des Ringes. In dieser Richtung soll das Führungselement den Rand der Öffnung nicht berühren.
3. c) Die Tiefe der Öffnung parallel zur senkrechten Achse entspricht der Wandstärke des Rastrings. Hier muss das Führungselement ausreichend lang sein, um bei maximaler Auslenkung des Rastrings diesen immer noch zu führen.

In addition, another advantageous exemplary embodiment of the invention provides that the ring wall has openings, preferably oval openings, in the area of the locking elements, through which guide elements of the shaft or the main body can be guided for guided deformation of the locking ring. These openings are arranged at the level of the latching elements and are therefore located on the ring sections that move the furthest outwards during the deformation. Alternatively, however, it is also conceivable that the openings and the guide elements are distributed arbitrarily over the circumference. This can possibly be advantageous for the mechanical stability in order to be able to better absorb tensile forces on the locking elements. The openings are guided over the guide elements so that the ring is deformed in a defined manner or always remains in the same plane of the ring. In a particularly advantageous embodiment, the openings are oval, since the wall sections move both perpendicularly and parallel to the ring axis when the ring is deformed. The geometry of the openings can result from:

1. a) The width of the opening parallel to the shaft axis is determined by the size of the guide element. There is as little play as possible in this direction.
2. b) The height of the opening parallel to the ring axis results from the maximum deformation of the ring. In this direction, the guide element should not touch the edge of the opening.
3. c) The depth of the opening parallel to the vertical axis corresponds to the wall thickness of the locking ring. Here, the guide element must be long enough to still guide the detent ring at maximum deflection.

It is also conceivable that the operating element has an opening or a cavity into which a guide element of the shaft or the main body can be guided when the ring is deformed. This interaction of the opening in the operating element with the guide element can also ensure that the locking ring moves in a predetermined ring plane.

The cross section of the locking ring is preferably oval, with the axis of the ring in the non-deformed state being longer than an axis perpendicular thereto, which crosses the locking elements. In the deformed state, this length ratio can change, at least for a short time.

In particular, it is conceivable that a center axis is aligned parallel to a shank axis of the shank through a center point of the locking ring and that this center axis reversibly shifts parallel to the shank axis when the locking ring is deformed.

A further solution to the problem mentioned at the outset is described by the features of claim 11 . Accordingly, a shaft for a surgical hand-held device, in particular a resectoscope, is provided, with the elongate shaft being able to be guided over working components of the hand-held device and with its proximal end being detachably coupled to a main body, in particular a conveyor, of the device. According to the invention, a locking ring according to claim 1 is attached to the proximal end. In this case, for a detachable connection of the shaft to the main body, the locking ring is arranged at least largely around an outer circumference of the proximal end of the shaft. This arrangement of the locking ring on the shaft allows the shaft to be handled particularly easily and flexibly.

An advantageous exemplary embodiment of the invention can further provide that at least two, preferably three, guide elements are arranged on the proximal end, which are fastened radially to a circumference of the shaft and coincide with openings in the locking ring in order to guide the locking ring in the event of deformation . These guide elements can have a mushroom-like design, with the ring being guided with its openings along a straight section and maximum deformation being limited by the head of the guide element. As a result, the ring can be deformed in a predefined manner and thus a reliable connection of the shank to the main body can be established.

In addition, it can be provided that a fastening means, preferably a screw, a pin, a latching means or the like, is arranged on the outer circumference of the proximal end for the, in particular detachable, connection of the latching ring to the shaft. This fixed connection of the locking ring to the shank makes it possible to cancel or restore the coupling between the shank and the main body with one hand.

A further solution to the problem mentioned at the outset is described by the features of claim 14 . Accordingly, it is provided that a hand-held surgical device, in particular a resectoscope, has a shaft and a main body, in particular a conveyor, wherein the shaft and the main body can be detachably coupled to one another by a locking ring according to claim 1 . This combination of the surgical hand-held device with the ring according to the invention allows the surgical hand-held device to be handled particularly easily and flexibly.

Preferably, it is conceivable that the locking ring is attached to the main body of the hand-held device or to a shaft according to claim 11. Finally, it is also conceivable according to the invention that the main body or the shaft has at least one counterpart, preferably an annular groove, with which the locking ring can be locked in a detachable manner. This configuration of the counterpart allows the shaft to be rotated relative to the main body. The locking connection between the shaft and the main body is thus independent of the relative orientation of the shaft to the main body. This allows the entire device to be used in a very flexible manner.

• 1 eine schematische Darstellung eines chirurgischen Handgerätes,
• 2 eine Sicht auf einen Rastring,
• 3 eine Seitendarstellung des Rastringes gemäß 2,
• 4 eine Schnittdarstellung des Rastringes gemäß der 2,
• 5 eine schematische Darstellung eines Teilbereichs des chirurgischen Handgerätes,
• 6 eine Schnittdarstellung des Teilbereichs gemäß der 5,
• 7 eine Schnittdarstellung des Teilbereichs gemäß der 6, und
• 8 eine Schnittdarstellung des Teilbereichs gemäß der 5.

A preferred embodiment of the invention is described in more detail below with reference to the drawing. In this show:

• 1 a schematic representation of a surgical hand-held device,
• 2 a view of a locking ring,
• 3 according to a side view of the locking ring 2 ,
• 4 a sectional view of the locking ring according to 2 ,
• 5 a schematic representation of a portion of the surgical hand-held device,
• 6 a sectional view of the portion according to 5 ,
• 7 a sectional view of the portion according to 6 , and
• 8th a sectional view of the portion according to 5 .

In the 1 a resectoscope 10 is shown as a possible exemplary embodiment of a surgical hand-held device. However, it should be expressly pointed out that the invention also includes other devices. Also puts that in the 1 The resectoscope 10 shown represents only one possible exemplary embodiment of a resectoscope and should not be restricted to this.

At the in the 1 The resectoscope 10 shown has a shaft 11 pushed over an optional inner shaft 12 . The shaft 11 or also the inner shaft 12 can be used to hold or guide an optical system 13 which extends from a distal end 14 to a proximal end 15 of the resectoscope 10 . An eyepiece 16 is available to a user at the proximal end 15 in order to observe the area to be operated on in front of the distal end 14 through the optics 13 .

An essential part of the resectoscope 10 is the transporter 17 or carriage.

In addition, an electrode instrument 22 extends along the resectoscope 10 from the distal end 14 of the resectoscope 10 to the transporter 17. At the distal end 14, the electrode instrument 22 has an electrode 23. This electrode 23 can be supplied with electrical energy via an HF generator (not shown), which is used to manipulate tissue.

In the 1 a locking ring 25 is shown in a highly schematic manner. For the sake of clarity, all details have been omitted in this representation of the locking ring 25 . This locking ring 25 has the function of detachably connecting the shank 11 to the main body of the surgical instrument. At the in the 1 In the exemplary embodiment shown, the locking ring 25 connects the shank 11 to the feed dog 17. Likewise, it is provided according to the invention that the locking ring 25 can also be used to connect other types of shank components to other embodiments of a main body. This locking ring 25 can be firmly connected either to the proximal end 24 of the shaft 11 or to the feed dog 17 . The corresponding counterpart for the locking connection is arranged on the other component. In the exemplary embodiment shown here, the locking ring 25 is connected to the proximal end 24 of the shaft 11 .

That in the 2 illustrated embodiment of the locking ring 25 is slightly oval in cross section. That is, a ring axis 26 is longer than an axis 27 that extends perpendicular to the ring axis 26 through the plane of the ring. The mean diameter of the locking ring 25 corresponds approximately to the diameter of the shank 11 or can be slightly larger than the diameter of the shank 11 . The wall 28 of the locking ring 25 can be a few tenths of a millimeter, preferably 1 mm, in particular 1 mm to 3 mm. The width of the locking ring 25 can be a few millimeters, preferably 2 mm - 10 mm, in particular 4 mm - 6 mm. The locking ring 25 is preferably made of a heat-resistant, reversibly deformable plastic. However, it is also conceivable that the locking ring 25 is made of a metal with comparable material properties.

On an inner side 29 of the wall 28, two opposing latching elements 30, 31 are arranged. These latching elements 30, 31 are positioned at sections which are at the greatest possible distance from the axis 26 of the ring. However, it is also conceivable that the latching elements 30, 31 are arranged at a different position on the inside 29. It is equally conceivable that the locking ring 25 has only one locking element, three, four or more locking elements. These latching elements 30 , 31 have a jagged or tooth-like cross section, ie they taper towards the ring axis 26 . Outer edges of the locking elements 30, 31 have a radius and are modeled at least approximately on the curvature of the locking ring 25. The inner edges of the locking elements 30, 31 form a circle around the shaft axis (in 2 indicated by a circle 41).

An operating element 32 is assigned to an upper section of the locking ring 25 . This operating element 32 is arranged relative to the latching elements 30 , 31 on an outer side 33 of the wall 28 in such a way that the ring axis 26 runs directly through the operating element 32 . The operating element 32 and the locking elements 30, 31 are thus in one Angular distance of 90 ° to each other on the wall 28 arranged.

The operating element 32 can, as for example in FIG 3 shown, have the same width as the locking ring 25 and has a substantially rectangular cross-section. The operating element 32 is designed as an actuating means. The action of force on the operating element 32 parallel to the ring axis 26 deforms the locking ring 25 in such a way that its oval structure changes. The length of the ring axis 26 decreases and the axis 27 becomes longer. The distance between the two locking elements 30, 31 increases as a result. Due to the purely elastic deformation of the material, the locking ring 25 assumes without force perpendicular to the axis 27 again its original, in which 2 shown, form. As a result of this short-term and reversible deformation, the locking elements 30, 31 can be brought out of contact with corresponding counterparts and a locking connection can thus be canceled. Likewise, the locking connection can be restored when the force acting on the operating element 32 is stopped.

The 3 and 4 it can be seen that the wall 28 has openings 34 , 35 at the level of the latching elements 30 , 31 . These openings 34, 35 are oval and also lie on the axis 27. The longer axis of the oval openings 34, 35 run parallel to the ring axis 26.

Besides, he can 4 be taken that within the element 32 a cavity 36 is arranged. This cavity 36 is in the same vertical plane as the openings 34, 35.

Finally lets the 4 recognize that an opening 37 is also arranged in a section of the wall 28 opposite the operating element 32 . This is also in the same vertical plane as the openings 34, 35 and the cavity 36.

As in the 5 until 8th As shown, the locking ring 25 is secured to the proximal end 24 of the shaft 11 and is in locking engagement with a portion of the feed dog 17 . Further details of the proximal shaft section 24 and of the transporter 17 will not be discussed further here. Rather, only the features essential to the invention are discussed here.

In the embodiment shown here, four guide elements 39 are arranged at an angular distance of 90° on an outer circumference 38 of the proximal end 24 of the shaft 11 . The locking ring 25 is connected to the proximal end 24 and guided in its movement via these guide elements 39 . One of these guide elements 39 is assigned to a lower section of the proximal end 24 and corresponds in its shape and positioning to the lower opening 37 of the locking ring 25. The guide element 39 arranged there is designed like a screw and can be screwed into the shaft 11 in such a way that the locking ring 25 is firmly connected to the shaft 11 at this ring section. The guide elements 39 arranged perpendicular to this guide element 39 on the circumference 38 are positioned in such a way that they protrude through the openings 34, 35. A straight section of these helical guide elements 39 runs through the openings 34, 35 and the head of the guide elements 39 is mounted outside of the wall 28 and at a sufficient distance for deformation in the direction of the axis 27. In a relaxed or non-deformed state, the straight section of the guide elements 39 is in contact with a lower wall section of the oval openings 34, 35 (see Fig. 5 ).

Another guide element 39 is positioned on the periphery 38 of the proximal end 24 in such a way that it falls into the cavity 36 of the operating element 32 .

If the operator applies force to the operating element 32 parallel to the ring axis 26 or perpendicular to the axis 27, the locking elements 30, 31 are now moved outwards due to the fixed connection of the locking ring 25 to the shaft 11 in such a way that the oval Openings 34, 35 move along the guide elements 39. At the same time, the upper guide element 39 is guided into the cavity 36 of the operating element 32 . This deforming movement is ultimately limited by the heads of the lateral guide elements 39, namely the wall 28 abuts against the heads of the guide elements 39. Alternatively, it is also conceivable that elements without heads are also used, so that the deformation caused by the impact of the operating element 32 at the circumference 38 is limited. However, this deformation is sufficient to cancel the locking connection with the conveyor 17 .

As in the 7 , 8th As can be seen, the counterpart of the locking elements 30, 31 on the conveyor 17 is designed as an annular groove 40. This ring-like groove 40 extends around the entire circumference of the conveyor 17 and has a projection into which the locking elements 30, 31 engage when the locking ring 25 is not deformed. The proximal end 24 of the shaft 11 and the corresponding end of the transporter 17 are designed to fit so that a sufficient efficient connection or seal between the two components can be reached in this locked state. A more detailed description of further sealing elements, guide mechanisms and the like of the shaft 11 and of the transport dog 17 should be dispensed with here.

However, it is essential for the description of the invention that, due to a deformation of the locking ring 25 due to the force acting on the operating element 32, the locking elements 30, 31 are moved apart just far enough for the locking elements 30, 31 to be brought out of contact with the ring-like groove 40 . Without the application of force, the latching elements 30, 31 again engage in a latching connection with the groove 40 due to the reversibility of the latching ring 25.

Due to the fact that the ring-like groove 40 is designed as a circumferential ring, the shank 11 can also be rotated about the feed dog 17 in the latched state. Or the shaft 11 can be locked with the locking ring 25 independently of the relative angular position to the feeder 17 with the same. This enables a particularly flexible and therefore advantageous use of the resectoscope 10.

Due to the property of the material of the locking ring 25, only a small amount of force is required to convert the locking ring 25 from its non-deformed, relaxed shape into the unlatching, deformed shape. The necessary force is so small that the operating surgeon can apply it with a single finger, so that the shaft 11 can be coupled or decoupled to the conveyor 17 with one hand. As a result, handling of the entire resectoscope 10 is particularly efficient.

Reference List

10

resectoscope

11

shaft

12

inner shaft

13

optics

14

distal end

15

proximal end

16

eyepiece

17

carrier

18

grip means

19

spring element

20

grip means

21

optical panel

22

electrode instrument

23

electrode

24

proximal end

25

locking ring

26

ring axis

27

axis

28

wall

29

inside

30

locking element

31

locking element

32

control element

33

outside

34

opening

35

opening

36

cavity

37

opening

38

Scope

39

guide element

40

groove

41

Circle

Claims (16)

Locking ring (25) for the detachable connection of a shaft (11) of a surgical hand-held device, in particular a resectoscope (10), with a main body, in particular an inner shaft or a conveyor (17) of the surgical hand-held device, in particular the resectoscope (10), the locking ring (25) can be reversibly deformed in its ring shape and at least one locking element (30, 31) of the locking ring (25) can be brought out of contact with a counterpart by the reversible deformation, as a result of which the connection between the shaft (11) and the main body can be released . Locking ring (25) after claim 1 , characterized in that the locking ring (25) can be fastened to the shaft (11) or the main body and the at least one counterpart, which is preferably designed as an annular groove (40), is arranged on the main body or the shaft (11). Locking ring (25) according to one of Claims 1 or 2 , characterized in that at least two opposing locking elements (30, 31) are arranged on an inner side (29) of the locking ring (25), which are aligned with a ring axis (26) running perpendicularly through the locking ring (25). Locking ring (25) according to one of the preceding claims, characterized in that at least one operating element (32) is arranged on an outer side (33) of the locking ring (25), the locking ring (25) being reversibly deformable by the action of force on the operating element (32). and the two latching elements (30, 31) can thereby be moved radially outwards. Locking ring (25) after claim 4 , characterized in that the at least one operating element (32) is positioned on the ring axis (26). Locking ring (25) according to claims 4 or 5 , characterized in that the locking ring (25) can be connected, preferably screwed, clamped or latched, to a wall section on the shaft (11) or the main body opposite the operating element (32). Locking ring (25) according to one of the preceding claims, characterized in that the annular wall (28) in the region of the locking elements (30, 31) has openings (34, 35), preferably oval openings (34, 35), through which for a guided deformation guide elements (39) of the shaft (11) or the main body can be guided. Locking ring (25) after claim 4 , characterized in that the operating element (32) has an opening or a cavity (36) into which a guide element (39) of the shaft (11) or the main body can be guided when the ring (25) is deformed. Locking ring (25) according to one of the preceding claims, characterized in that a cross section of the locking ring (25) is oval, with the ring axis (26) in the non-deformed state being longer than an axis (27) perpendicular thereto, which holds the locking elements ( 30, 31) crosses. Locking ring (25) according to one of the preceding claims, characterized in that a central axis through a center point of the locking ring (25) is aligned parallel to a shank axis of the shank (11) and this central axis is parallel to the shank axis when the locking ring (25) is deformed reversibly shifted. Shaft (11) for a surgical hand-held device, in particular a resectoscope (10), the elongate shaft (11) being able to be guided over the working components of the hand-held device and having its proximal end (24) on a main body, in particular a conveyor (17) of the Hand-held device is detachably coupled, characterized in that at the proximal end (24) according to a locking ring (25). claim 1 secured for releasable connection to the main body, the locking ring (25) extending at least substantially around an outer periphery (38) of the proximal end (24). Shaft (11) for a surgical hand-held device claim 11 , characterized in that at least two, preferably three or four, guide elements (39) are arranged on the proximal end (24), which are fastened radially to a circumference (38) of the shaft (11) and are provided with openings (34, 35) collapse in the locking ring (25) in order to guide the locking ring (25) in the event of deformation. Shaft (11) for a surgical hand-held device claim 11 or 12 , characterized in that a fastening means, preferably a guide element (39), a screw, a pin, a latching means or the like, is arranged on the outer circumference (38) of the proximal end (24) for the, in particular detachable, connection of the latching ring ( 25) with the shaft (11). Surgical hand-held device, in particular a resectoscope (10), with a shaft (11) and a main body, in particular a conveyor (17), the shaft (11) and the main body being connected by a locking ring (25). claim 1 are detachably coupled to each other. Surgical hand-held device Claim 14 , characterized in that the locking ring (25) on the main body of the handset or on a shaft (11). claim 11 is attached. Surgical hand-held device Claim 14 or 15 , characterized in that the main body or the shaft (11) has at least one counterpart, preferably an annular groove (40), with which the locking ring (25) is releasably latched.

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