WO2017097707A1

WO2017097707A1 - Resectoscope comprising an electrode

Info

Publication number: WO2017097707A1
Application number: PCT/EP2016/079757
Authority: WO
Inventors: Christian Brockmann; Nils Kapfermann
Original assignee: Olympus Winter & Ibe Gmbh
Priority date: 2015-12-11
Filing date: 2016-12-05
Publication date: 2017-06-15
Also published as: DE102015016099A1; DE102015016099B4

Abstract

The invention relates to a resectoscope (1) comprising an electrode (9) that, by means of its proximal end region, is in electrical contact, on a coupling body (13), with a cable (12) that terminates here, said coupling body (13) being removably arranged in a carriage (6) that can be displaced longitudinally on the resectoscope (1), and it being possible for said electrode (9) to be stopped by means of a stop element (10). The invention is characterised in that the electrode (9) can be stopped on the coupling body (13).

Description

Resectoscope with an electrode

description

The invention relates to a resectoscope of the type mentioned in the preamble of claim 1. The electrode of such a resectoscope is coupled for operation to the longitudinally displaceable carriage in order to be moved longitudinally by the latter for resecting tissue.

The coupling of the electrode to the carriage provides a coupling body which is detachably mounted on the carriage. The electrode must be secured against the slide to ensure joint movement. Serves a locking element in the form of a slider. According to the state of the art, e.g. in DE 10 2012 023 275 A1, the slider is designed such that it is mounted transversely to the direction of movement of the carriage directly to this.

This prior art initially has the disadvantage that the relatively complicated construction of the slider must remain on the carriage even when cleaning the resectoscope and thus must be constructed consuming and high quality for these purposes. In doing so, consideration must be given to the multiple use and to the complicated cleaning in view of the installation situation. The object of the present invention is to improve the locking of the electrode on the carriage. This object is achieved with the features of the characterizing part of claim 1. According to the invention, the electrode is not locked on the carriage but on the coupling body, which in turn is detachably mounted on the carriage. The entire lock can thus be removed with the coupling body from the carriage and also from the electrode and processed separately, which greatly facilitates the treatment (cleaning and disinfecting). In addition, the electrode and / or the coupling body can be designed for single use, so that the treatment can be completely eliminated.

Advantageously, according to claim 2, the locking element is formed substantially as a bending spring, which is held by an elastic holder so that it can engage in the unloaded state on the electrode, while with compressed holder, e.g. by holding between two fingertips and squeezing, disengaged. This construction is thus very easy to use intuitively and cost as a disposable component manufacturable. The coupling body is arranged on the carriage and in turn serves to receive the electrode. It is advantageous lockable according to claim 3 on the carriage, for example latching, clamping or screwed. By this locking a precise fit of the coupling body is ensured so that in turn can hold the electrode precisely relative to the carriage.

Advantageously, the locking element is designed to lock both the electrode and the coupling body. Thus, the operation of the resectoscope can be simplified because the unlocking of the electrode and the coupling body can be triggered with a common operation. The locking element is advantageously designed according to claim 5 such that upon actuation first the electrode and then the coupling body are unlocked. This corresponds to the sequence when disassembling the resectoscope, which has proven to be particularly practical.

Advantageously according to claim 6, the locking element is designed for electrical contacting and correspondingly electrically connected. As a result, the required for the operation of the resectoscope electrical contacting of the electrode is made in a particularly simple manner at a point which is formed mechanically contacting anyway.

Advantageously, according to claim 7, the locking element is designed as a slide, which is mounted in a slider slot formed in the carriage. This construction is characterized by robust and economical simplicity.

Advantageously according to claim 8, the cable is connected to a high-frequency generator. The electrode of the resectoscope, for example a cutting loop of conventional construction, can be subjected to particularly suitable high-frequency current in this way.

Advantageously according to claim 9, the coupling body is mounted in a coupling shaft of the carriage. This also makes use of the proven slide-in design for the storage of the coupling body. It is advantageous according to claim 10 of the slide shaft arranged such that it passes through the wall of the coupling shaft. In this constructively very simple way, the locking body locking the function of the slider is guaranteed. In the drawing, the invention is shown for example and schematically. Show it: 1 is a side view of a resectoscope according to the invention with a carriage,

2 is an enlarged side view of the carriage of Fig. 1,

3 is a section along line 3-3 in Fig. 2,

Fig. 3a shows an enlarged detail of Fig. 3 Fig. 4 shows the section of Fig. 3 in a variant embodiment and

Fig. 5 shows the construction of Fig. 4 in the actuated state.

FIG. 1 shows a side view of the basic construction of a resectoscope 1. This has a shaft tube 2 which terminates proximally on a main body 3, from which in the proximal direction a guide tube 4 is extended, which serves for introducing an endoscope optical system 5.

On the guide tube 4, a carriage 6 is mounted longitudinally movable, which is movable with a finger grip piece 7 by operation with the hand against a fixed to the guide tube 4 finger ring 8.

The carriage 6 takes with it an electrode 9, which is taken with its proximal end on the carriage 6 and locked with a locking element 10. At the distal end, the electrode 9 carries a cutting loop 11 which is usual in resectoscopes. The electrode 9 passes longitudinally through the shaft tube 2 and the main body 3 as shown in FIG. 1 with a dashed line.

From the carriage 6 downgoing hanging a cable 12 which is electrically contacted in the carriage 6 with the proximal end of the electrode 9 and is connected at its other end to a high-frequency generator 26 to apply the cutting loop 1 1 with high-frequency current. The cable 12 ends on the side of the resectoscope 1 in a coupling body 13 which is removably attached to the carriage 6.

Fig. 2 shows the carriage 6 of Fig. 1 in two-fold magnification. Fig. 3 shows in the same magnification a section along line 3 - 3 in Figure 2.

The section of FIG. 3 shows the slidable on the guide tube 4 slide 6, in which a downwardly open coupling shaft 14 is formed, which receives the coupling body 13 perpendicular to the axis of the guide tube 4 slidably.

The coupling body 13 includes a direction perpendicular to the direction of the coupling shaft 14 arranged slide shaft 15 which receives the locking member 10 slidably in the direction of chess. The locking element is slidably disposed in the slide shaft 15 against a spring 16 and can be pushed by finger pressure from the outside on the rounded outer face of the locking element 10 from the rest position shown in Fig. 3 in a depressed position. As shown in FIG. 3 and in particular the enlarged detail of FIG. 3 a, the locking element 10 contains a passage opening 17, through which the electrode 9 extends, which also passes through the coupling body 13 in a longitudinal bore 18.

As shown in FIGS. 3 and 3a show, the electrode 9 at the point where it is in the final position in the coupling body 13, an annular projection 19, on which with the edge of the passage opening 17, as shown in the figures, can get into locking engagement and held in this locking engagement by the spring 16. After actuation of the locking element 10 by pressing against the spring 16, the edge of the passage opening 17 is separated from the electrode 9 and this is thus released to free longitudinal displacement. Thus, if one looks at FIG. 2, after pressure on the locking element 10, the electrode 9 is unlocked and withdrawn in the distal direction from the slide 6. The slide formed by the locking element 10 and seated in the slide shaft 15 thus forms with the edge of the passage opening 17 the locking element securing the electrode 9.

As can be seen from FIG. 3, the slide shaft 15 also passes through the wall 20 of the coupling shaft 14 in the form of an opening 15a. As a result, the coupling body 13 is locked, ie secured against unintentional release by the slide 6.

The locking element 10 can be pressed by pressure from the outside so far into the coupling shaft 14 that it releases the opening 15 a in the wall 20. The coupling body 13 is then no longer locked and can be pulled out of the slider 6 down.

The locking element 10 thus forms in the slide shaft 15 from a slider which locks both the electrodes 9, and the coupling body 13. Looking at Fig. 3, it can be seen that when pressing the locking member 10, first after a very small stroke, the electrode 9 is released and then after a slightly deeper stroke the engagement with the opening 15a in the wall 20 will leave. Thus, first the electrode 9 is unlocked and then the coupling body 13.

The construction shown in Fig. 3 couples the electrode 9 not only mechanically with the coupling body 13 but also electrically. The current-carrying cable 12 ends to the coupling body 13 to a existing of electrically conductive metal contact ring 21; the attached in the preferably made of insulating plastic coupling body 13, for example is shed. The locking element 10 extends through the opening of the contact ring 21 and brings it into contact with an electrically conductive portion 22 of the slider. This electrically conductive portion forms the part of the locking element 10, which comes into contact with the electrode 9 at the edge of the passage opening 17.

Thus, this is also electrically connected to the cable 12 at the same time with mechanical locking of the electrode 9. In the electrical contacting described in Fig. 3, the current flow between the contact ring 21 and the portion 22 passes through the sliding surface, with which these two parts slides upon movement of the locking element into one another. High-frequency current flow through rubbing sliding surfaces leads to heavy wear. Grinding or sliding contact points should therefore be better avoided. In a manner not shown in the construction of FIG. 3 can be done structurally simple in that the spring 16 is electrically conductive and fixed at one end to the section 22 and the other end on the contact ring 21.

Figures 4 and 5 show in two operating positions a coupling body 13 'in a variant.

In the slide shaft 15, instead of the arrangement which is mounted there in the embodiment of Fig. 3, a slide shaft 15 fills the holder 23 is arranged, which consists of volume-elastic material. The holder 23 is used to hold a trained in the embodiment as an ellipse metal spring 24, which surrounds the electrode 9 and resiliently applied thereto. As a result, the passage of the annular projection 19 of the electrode 9 is blocked.

Also in this embodiment, electrical contacting takes place. The metal spring 24 is connected for this purpose with a line 25 to the cable 12. Fig. 4 shows the holder 23 in a relaxed position.

Fig. 5 shows the position in which the holder 23 has been compressed in the direction of the arrow shown in Fig. 5 to the. This compression of the holder 23 takes place substantially in the direction of the arrow of FIG. 5. This results in a force on the elliptical metal spring 24 in the direction of its major axis. This causes a shortening in the direction of the major axis and consequent widening in the direction of the minor axis, as shown in FIG. 5. As a result, as also shown in FIG. 5, the electrode 9 is now released and can be moved freely in the longitudinal direction.

LIST OF REFERENCE NUMBERS

1 resectoscope

2 shaft tube

3 main body

4 guide tube

5 endoscope optics

6 sleds

7 grip piece

8 finger ring

9 electrode

10, 10 'locking element

1 1 cutting loop

12 cables

13, 13 'coupling body

14 coupling shaft

15 slide shaft

15a opening

16 spring

17 passage opening

18 longitudinal bore

19 ring projection

20 wall

21 contact ring

22 section

23 holders

24 metal spring

25 line

26 high-frequency generator

*****

Claims

claims

1 . Resectoscope (1) having an electrode (9) which is electrically contacted with its proximal end portion on a coupling body (13) with a cable (12) terminating thereon, wherein the coupling body (13) in a slide longitudinally displaceable on the resectoscope (1) (6) is arranged detachably and wherein the electrode (9) by means of a locking element (10) can be locked, characterized in that the electrode (9) on the coupling body (13) can be locked.

2. resectoscope according to claim 1, characterized in that the locking element (10 '), a bending spring (24) which is held by an elastic holder (23) such that they latched with unloaded holder against the electrode (9) and is held in compression load of the holder (23) is disengaged.

3. Resectoscope according to one of claims 1 or 2, characterized in that the coupling body (13, 13 ') on the carriage (6) can be locked.

4. resectoscope according to claim 3, characterized in that the locking element (10, 10 ') both the electrode (9) on the coupling body (13) and the coupling body (13) on the carriage (6) is designed to be arresting.

5. resectoscope according to claim 4, characterized in that the locking element (10) is designed such that upon actuation first the electrode (9) and then the coupling body (13, 13 ') is unlocked.

6. Resectoscope according to one of the preceding claims, characterized in that the locking element (10, 10 ') is designed for electrical contacting and is electrically connected.

7. Resectoscope according to one of claims 4 - 6, characterized in that the locking element (10) is designed as a slide which is mounted in a slide shaft (15).

8. Resectoscope according to one of the preceding claims, characterized in that the cable (12) is connected to a high-frequency generator.

9. Resectoscope according to one of the preceding claims, characterized in that the coupling body (13, 13 ') in a coupling shaft (14) of the carriage (6) is mounted.

10. resectoscope according to claims 7 and 9, characterized in that the slide shaft (15), the wall (20) of the coupling shaft (14) is arranged to pass through.