WO2016162113A1

WO2016162113A1 - Transporter and plug of a resectoscope

Info

Publication number: WO2016162113A1
Application number: PCT/EP2016/000530
Authority: WO
Inventors: Nils Kapfermann
Original assignee: Olympus Winter & Ibe Gmbh
Priority date: 2015-04-09
Filing date: 2016-03-30
Publication date: 2016-10-13
Also published as: DE102015004328A1; DE102015004328B4

Abstract

The invention relates to a transporter (1) of a resectoscope, comprising a guide tube (2) which extends in the longitudinal direction of the resectoscope and is configured to hold an endoscope optical system and a carriage (3) mounted thereupon in a longitudinally displaceable manner, comprising handle pieces (7, 5) on the guide tube (2) and on the carriage (3) for longitudinally displacing the carriage (3), comprising a return spring (8) mounted on an end on the carriage (3) and the other end thereof mounted on the guide tube (2), having an electrode contact (20) arranged on the carriage (3) for contacting an electrode device (16, 19) fastened to the carriage (3), comprising a HF contact (21) which is arranged on the carriage (3) and electrically connected to the electrode contact (20) for contacting an HF cable (22) connected to a pole of a high-frequency generator (24) and comprising an earthing contact (27) for electrically connecting an earthing cable (25) to metal parts (2, 6, 15) of the transporter (1) which are rigidly connected to the guide tube (2), wherein the earthing contact (27) is arranged on the carriage (3) and is connected via a moveable conducting connection (28) to the metal parts (2, 6, 15) of the transporter which are rigidly connected to the guide tube (2).

Description

Transporter and plug of a resectoscope Description

The invention relates to a transporter of a resectoscope according to the preamble of claim 1, as well as a plug for it. US 6 113 597 A shows a resectoscope of the generic type. As is common practice in this type of construction, the ground contact is fastened to a fixed metal part of the transporter, that is to say immovably connected to the guide tube.

This has, above all, safety advantages, since in this way all metallic surfaces of the resectoscope lying outwards and towards the patient are grounded and thus the current flow from the electrode subjected to high frequency to ground always takes place on a short path to the resectoscope, but not in an undesired manner for example by the surgeon. In the known generic construction, however, problems arise with the cable laying. The cable connection for the high-frequency connection consists of the RF cable for connecting to the connection to the high-frequency generator and the ground cable with which the high-frequency circuit is closed. Both cables must be connected to the feed dog at the RF contact and the ground contact. These are in the known generic construction mentioned above at remote parts of the conveyor. The RF contact is on the carriage and supplies the moving with this electrode, while the ground contact to earth the non-moving outlying lying metal parts of the conveyor and lies there.

CONFIRMATION COPY E The two cables, namely the RF cable and the ground cable you want to lay as long as possible together to make the overall cable structure in the operation as possible confusion-free and clear. In the known generic construction, however, at least the last part of the cable in the vicinity of the transporter must be laid separately from the two contacts located separately at the transporter. This creates opportunities for disruption and hazards, for example, by snagging on external objects during the operation.

Another annoying point is that the two cables are contacted at locations of the transporter, which move against each other when the carriage is moved. Again, this can lead to problems in the clarity of the surgical field and problems with snagging or snagging.

Furthermore, there is a major security problem by the separate contacting of the two cables to each other moving contacts. During the movement of the one contact with respect to the other, namely when the carriage is moved on the feed dog, one of the cables may come off. This is especially critical when the ground cable is removed. Then high-frequency voltage is at the mass-free conveyor and seeks the shortest path to an external mass, for example through the body of the surgeon or through the patient's foot, which can lead to complications.

A common disorder in a resectoscopic surgical site is inadvertently pulling on one of the cables that emerge from the resectoscope. For example, the cause may be that someone accidentally steps on a cable and fixes it while the operator is performing movements with the feed dog, which the cable can no longer follow.

The cable then suddenly pulls on the feed dog. On the one hand, this hinders the freedom of movement of the surgeon, which, for example, can lead to erroneous movements of the cutting electrode in the patient's body. On the other hand, a cable can be deducted from the feed dog, which can form a major security problem especially in the case of the ground cable. DE 10 2012 009 058 A, DE 10 2012 013 735 A1 and DE 10 2012 013 736 A1 show a non-generic feed dog which has no ground connection but two electrodes connected to separate sources and two HF connections for this, both are arranged on the carriage. The safety issues associated with grounding are eliminated here.

The object of the present invention is to improve the working safety and in particular the electrical safety in a generic transporter of a resectoscope.

This object is achieved with the features of the characterizing part of claim 1.

According to the invention, the ground contact is arranged on the carriage. It follows that the ground contact is now arranged on the same part as the RF contact. Both contacts sit on the sled. They sit next to it and can be arranged very close together. This eliminates a number of the problems discussed. Above all, a movement between the contacts is avoided, which in turn eliminates problems. The problems described when removing the ground cable omitted, since when removing the ground terminal and the RF port is removed. This results in an overall very safe construction.

In the construction according to the invention, the ground contact is mechanically seated on the carriage, but is electrically connected to the metal parts of the conveyor to be grounded, which are fixed relative to the guide tube and thus moved relative to the carriage. This requires a movable electrical lead connection between the ground contact and the metal parts firmly connected to the guide tube. This would require a connection cable that complicates the surgical site. Advantageously, therefore, the features of claim 2 are provided, which provides the electrical lead connection extending over the return spring. The lead is therefore short, runs only close to the feed dog itself and makes the work overall simple, clear and secure.

This guide connection may be formed, for example, as an electrical cable that is arranged to extend on the return spring. In contrast, however, are advantageous but the Features of claim 3, according to which the return spring itself is designed as a lead compound. It may, for example, consist of conductive material, for which, for example, the leaf spring usual in the state of the art as a return spring is offered. The carriage usually consists of a plastic body, arranged on the electrically conductive devices, for example, are embedded. The return spring could thus be mounted on the slide itself to non-conductive plastic material, but preferably according to claim 4 mounted on a metal pin which forms the ground contact. This results in an immediate contacting of the ground contact by the return spring. The return spring may be formed in a largely arbitrary manner according to the known prior art, provided that it conducts sufficient current only from one end to the other.

The metal pin forming the ground contact is advantageously designed according to claim 5 at the end as a socket, so that there the cable to be connected with a plug, for example in the form of a banana plug, is easily connectable.

The metal pin "advantageously traverses the carriage transversely to its direction of movement and is designed as a socket at both ends in order to contact the metal pin, thus resulting in a plug construction which, particularly in the embodiment according to claim 7, holds securely and is easy to operate.

Advantageously according to claim 8, the RF cable and the ground cable have a common connector, which can simultaneously contact both the RF contact and the ground contact of the carrier. Together with the features of claim 6, this results in a three-legged design that attacks safe and stable from three sides on the feed dog.

Preferably, according to claim 9 results in an orthogonal insertion direction of the RF contact with respect to the two ground contacts. This in turn promotes the safe plug attitude. - -

Claim 10 relates to the plug shown in claims 7 to 9. In the drawing, the invention is shown for example and schematically. Show it: Fig. 1 is a side view of a conveyor according to the invention and Fig. 2 is a section along line 2 - 2 in Fig. 1st

Fig. 1 shows a feed dog 1 of a resectoscope, not otherwise shown. The feed dog essentially has an elongated guide tube 2 and a slide 3 mounted thereon in a longitudinally displaceable manner, in which the guide bore 4 can be seen in the sectional representation of FIG. 2, with which the slide 3 is mounted on the guide tube 2.

On the carriage 3, a moving handle 5 is attached. At the proximal end of the guide tube 2, an end plate 6 is fixed to which a fixed handle 7 is attached. By finger attack on the two grips 5 and 7, the carriage 3 can be adjusted relative to the feed dog 1 and against a return spring 8, which attaches to the carriage 3 on the one hand and on the end plate 6 on the other hand and pushes these parts apart.

For the return spring 8 several known in the art constructions are possible. A very old and well-functioning construction consists of a U-shaped leaf spring. The spring construction according to DE 101 26 542 A1 is also well suited which is used in the illustrated embodiment.

The return spring 8 has two levers 9, 10, which are hinged together with a hinge 11. At the free end of the lever 9 is mounted on a metal pin 12 which passes transversely to the guide tube 2, the carriage 3 and projects beyond it at the ends.

The other lever 10 is mounted with a hinge 13 on the end plate 6. A compression spring 14 acting between the two levers 9, 10 is compressed when the gripping pieces 5, 7 are compressed in the direction of the arrows shown in FIG. 1 and thus supplies the restoring force of the return spring 8. ■ ^■ -

The illustrated design of the transporter 1 is referred to as "active", as with her used for working retractive movement of the carriage 3 under application done by muscle power. In the "passive" design, which can be used here as an alternative, the carriage is moved in the distal direction with muscular strength and is withdrawn from the return spring for working. For this purpose, in a simple modification of the construction shown in Fig. 1, the return spring between the carriage and the distal end of the guide tube may be arranged, which would also be offset to the fixed handle.

As is known from DE 101 26 542 A1, the construction of the restoring spring consisting of a lever mechanism and a compression spring used there can be used both with a one-sided lever and with levers arranged on both sides of the carriage. Fig. 2 shows a double-sided lever construction in which parallel to the lever 9 on the other side of the carriage 3, a lever 9 'is arranged, which is mounted parallel to the lever 9 on the metal pin 12. However, it is also a one-sided lever used here.

On the guide tube 2 a in resectoscopes usual, also shown in the already mentioned DE 101 26 542 A1 cone body 15 is fixed, which limits on the end plate 6 opposite side of the carriage 3 whose trajectory. Through the cone body 15 extends in a laterally offset channel formed a support 16 of an electrode inserted in its dashed lines in Fig. 1, proximal end portion in a only in Fig. 2 to be seen receiving bore 17 of the carriage 3 and with a resilient or threaded working locking button 18 is secured. The carrier 16 has in conventional training an external insulation with internal electrical conductor wire 19 which forms an electrode, for example in the form of the usual cutting loop, at the distal end of the carrier 16, not shown.

If the carrier 16 is inserted with its proximal end shown in dashed lines in the carriage 3, as shown in FIG. 1, then it is contacted there by a connecting conductor 20 which connects to a formed as a conductive socket RF contact 21, the is accessible from the outside accessible on the carriage 3.

In the RF contact 21 is a plug shown as a banana plug 23 of an RF cable 22 can be inserted, which is connected to the marked with a lightning bolt Hochspannungspol a high-frequency generator 24. The high frequency generator 24 still has a second terminal pole, which is marked with the ground symbol. At these a plug 26 is connected via a ground cable 25 which is connectable to a trained as a socket ground contact 27 on the carriage 3. The ground contact 27 is connected via an inner connecting conductor 28 in the carriage 3 to the metal pin 12.

The return spring 8 is formed as a continuous electrically conductive lead. For example, the joints shown and the two levers 9, 10 made of metal. The return spring 8 thus forms a conductive connection from the metal pin 12 via the metallically conductive end plate 6 to the guide tube 2 and to all metal parts fixedly connected thereto, e.g. the cone body 15 ..

Thus, all parts of the conveyor 1 are, except the existing plastic slide 3, all made of metal, grounded to the high frequency generator 23.

The embodiments of Figures 1 and 2 are not completely consistent. In the figures, the connection of the RF cable 22 and the ground cable 25 on the carriage 3 is formed differently.

In the embodiment of Fig. 1, the RF cable 22 and the ground cable 25 are each provided with their own plugs 23 and 26, which are in adjacent but separately arranged on the carriage 3 sockets plugged, which form the RF contact 21 and the ground contact 27 , In Fig. 1, these two jacks are each shown with dashed lines as a metallic contact sleeve in an insulating body shown in solid lines, which is attached to the insulating body of the carriage 3.

It may be provided in a manner not shown, a common for the cable 22 and 25 connector. For this purpose, only the two plugs 23 and 26 shown in Fig. 1 must be juxtaposed and secured to the insulating parts together.

Fig. 2 shows a clamping plug 30 with opposite arms 31. These comprise the carriage 3 on opposite sides, as shown in FIG. 2 and wear at the free ends plug 33, which are arranged so that they into the sockets at the opposite ends of the metal pin 12, can be inserted. As shown in FIG. 2.

The arms 31 are, as shown in FIG. 2, each halfway provided with a weakening point shown triangular, which allows the arms 31 to spring towards one another. This can be achieved that the connector 33 resiliently engage the metal pin 12 and are held securely clamped on this.

The plug 33 are connected in parallel to the ground cable 25.

Fig. 2 also shows that the terminals of the RF cable 22 and the ground cable 25 may be summarized in the clamping connector 30 in the form of a combination plug. This carries in the interior of a slide 3 hole open towards the plug 23 and thus, as shown in FIG. 2, are plugged onto the RF contact 21.

As shown in FIG. 2, the terminal connector 30 results in a plug construction which, with a total of three plugs 23, 33, 33, connects both cables 22 and 25 to the carriage 3 at the same time. In this case, the plug-in direction of the RF cable 22 subsequent plug 23 is perpendicular to the line connecting the two connectors 33 of the ground cable 25. The orthogonal design of the plug results in a particularly secure hold of the terminal connector 30 on the slide. 3

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LIST OF REFERENCE NUMBERS

Feed dog 31 arm

2 guide tube 32 arm

3 carriages 33 plugs

4 pilot hole

5 movable handle

6 end plate

7 fixed handle

8 return spring

9 levers

10 levers

11 joint

12 metal pin

13 joint

14 compression spring

15 cone body

16 carriers

17 locating hole

18 lock button

19 conductor wire

20 connecting conductors

21 RF contact

22 RF cables

23 plugs

24 HF generator

25 ground cables

26 plugs

27 ground contact

28 connection conductors

29 -

30 clamp connectors

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Claims

claims

1. transporter (1) of a Resektoskopes, with a longitudinal extent of the Resektoskopes extended, designed to accommodate an endoscope optical guide tube (2) and a longitudinally slidably mounted carriage (3) with grips (7, 5) on the guide tube (2) and on Carriage (3) for longitudinal adjustment of the carriage (3), with a return spring (8) mounted at one end on the carriage (3) and at its other end on the guide tube (2), with an electrode contact (20) arranged on the carriage (3) ) for contacting an electrode device (16, 19) attached to the carriage (3), with an HF contact (21), which is arranged on the carriage (3) and electrically connected to the electrode contact (20), for making contact with a pole of a high-frequency generator (24 ) connected RF cable (22) and with a ground contact (27) for the electrical connection of a ground cable (25) to the guide tube (2) firmly connected metal parts (2, 6, 15) of the transporter (1), characterized in that the ground contact (27) is arranged on the carriage (3) and is connected to the metal parts (2, 6, 15) of the transporter (1) firmly connected to the guide tube (2) via a movable guide connection (8).

2. Transport rotor of a resectoscope according to claim 1, characterized in that the guide connection is formed at least partially extending over the return spring (8).

3. transporter a Resektoskopes according to claim 2, characterized in that the return spring (8) forms the lead compound.

4. transporter resectoscope according to claim 3, characterized in that the return spring (8) on the carriage (3) is mounted on a ground contact forming metal pin (12).

5. transporter of a resectoscope according to claim 4, characterized in that the metal pin (12) is formed at the end as a socket.

6. transporter of a resectoscope according to claim 5, characterized in that the metal pin (12) passes through the slide (3) transversely and is formed at both ends as a socket.

7. transporter of a resectoscope according to claim 6, characterized in that the ground cable (25) has a plug (30), the fork-shaped carriage (3) encompassing and both ends of the metal pin (12) is formed contacting.

8. transporter a Resektoskopes according to any one of the preceding claims, characterized in that the RF cable (22) and the ground cable (25) have a common plug (30) for contacting the RF contact (21) and the ground contact ( 12) is formed.

9. transporter of a resectoscope according to claims 6, 7 and 8, characterized in that the RF contact (21) is arranged with its plugging direction perpendicular to the connecting line of the sockets of the ground contact (12).

10. Plug for connecting a ground cable to a transporter of a resectoscope, according to one of claims 7 to 9.

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