WO2011120642A1

WO2011120642A1 - Surgical instrument

Info

Publication number: WO2011120642A1
Application number: PCT/EP2011/001370
Authority: WO
Inventors: Valentin Leiber
Original assignee: Glaser Gmbh Surgical Instruments
Priority date: 2010-03-29
Filing date: 2011-03-21
Publication date: 2011-10-06
Also published as: DE102010013296A1

Abstract

The invention relates to a surgical instrument, in particular for arthroscopy, having a shaft (4), a sliding part (5), and a lock (11) for retaining the sliding part (5) on the shaft (4), wherein the lock (11) comprises a locking lug (12) and a spring, wherein the locking lug (12) and the spring are integral.

Description

Surgical instrument

The present invention relates to a surgical instrument according to the preamble of claim 1 and to a method for disassembling the surgical instrument.

State of the art

Pliers for surgery are known from the prior art, with which you can perform different activities depending on the design of the pliers. Thus, sliding shaft instruments are known, which are used in the field of surgery. These instruments have at their tip an active functional element, such as a pair of scissors or forceps, with which tissue can be processed. These instruments are also used in arthroscopy.

CONFIRMATION COPY In practice, such surgical instruments have proven to be problematic in that impurities can settle between the individual components, which may not be sufficiently sterilized or removed during sterilization. Better sterilization results can be achieved by dissecting the instruments.

But it is often the disassembly of the surgical instruments is often complex and a later assembly requires some practice to a training, depending on the nature of the surgical instrument. In particular, in practice, conventional coil springs present difficulties which perform various tasks in various surgical instruments. These coil springs serve, for example, to secure a part of the surgical instrument or to maintain a tension between two scissor handles.

In particular, conventional springs, as known from US 4,712,545 or known from the medical instrument from DE 199 15 427 A1, are often foci of impurities.

For the sake of completeness, reference is also made to DE 20 2008 001 675 U1 in this context. There is shown a collapsible surgical instrument. However, the solution mentioned there is expensive and in particular prepares new problems in sterilization, since the above-mentioned utility model suggests to use a spring-loaded slide to actuate a lock. In particular, the spring causes problems in sterilization, since it provides small gaps. Moreover, in the above-mentioned solution, the sliding part can only be released from the shaft relative to the shaft in a position of the sliding part, so that the handling is complicated. Disclosure of the invention

The object of the invention is to improve the sliding shaft instruments from the prior art, in particular the object of the invention is to improve a generic surgical instrument in such a way that the handling is simplified, is improved by the sterilization and the mechanical design is simplified.

The object is achieved with a surgical instrument according to claim 1 and a method claim for disassembly of this surgical instrument.

The surgical instrument according to the invention is preferably a sliding-shaft instrument which can have various functional elements. The functional element is the element actuated by the sliding-shaft instrument, wherein forceps or cutting elements are particularly preferably used as functional elements.

The connection between the shaft and sliding part is preferably designed via rails or grooves.

It is important in this context that the sliding part can be moved horizontally to the shaft by moving the handles and on the other hand, the sliding part can be released from the shaft, wherein the sliding part remains connected to the functional element.

An inventive embodiment, the surgical instrument has a locking lug and a spring, wherein the latch is integrally formed. The spring effect is achieved, inter alia, a bow shape. This form describes a half to three-quarter circle. The one-piece construction has the advantage that a cleaning can be carried out in a simplified manner. Also a corresponding disassembly of the surgical instrument is simplified by the one-piece locking. Preferably, the latch is located in the handle which is received in the other handle. In this case, the lock in the corresponding receptacle on a thickening, which cooperates with a stop, which in turn is formed on the handle. This should advantageously prevent one hand, that the handle is unintentionally overrun.

In addition, the locking of a preferred embodiment of a coupling, which consists of a nose and a recess. It should be irrelevant whether the nose is formed on the lock and the corresponding recesses on the handle or whether the nose is formed on the handle and corresponding recesses are formed in the lock. The advantage here is that the lock can be engaged by means of the coupling and controlled accordingly.

Preferably, the locking has a profiling for manual operation. This profiling is used for easier actuation of the lock just in relation to the coupling. Preferably, a flattened axis is also arranged in a connecting part, which cooperates with a slot which extends into the connecting part handle. The advantage here is that the slot releases the flattened axis only in a certain angular position. This makes it easy to remove the handle from the connector. Preferably, a slot in the connecting part and a flattened axis is provided on the handle to be removed. It is also preferred that the slot is arranged on the handle to be removed and the flattened axis between two flanks of the connecting part. The advantage here is the easy removability of the handle at a predetermined angular position. Brief description of the drawings

Further advantages of the invention will be explained in the following context, preferably in embodiments.

FIG. 1 shows a side view of a surgical device according to the invention

Instruments in working position; shows a side view of the surgical instrument of Figure 1 according to the invention in a rest position; shows the surgical instrument of Figures 1 and 2 according to the invention in a sectional side view; shows an enlarged view of a part of Figure 3; shows a plan view of an inventive surgical instrument of Figure 2; and shows another side view of a surgical instrument according to the invention.

Description of a preferred embodiment

FIG. 1 shows a side view of an embodiment of a surgical instrument according to the invention, namely an arthroscopic forceps 1. The arthroscopic forceps 1 has a part 19 which comprises a handle 3, a connecting part 7 and a shaft 4. In addition, a handle 2 is shown. At the end is on the shaft 4 and the sliding part 5, a functional element 6 is shown in the working position. The connecting part 7 is arranged between the shaft 4 and the handle 3. By the movement of the handle 2 towards or away from the handle 3, the handle 2 causes a sliding part 5 is moved relative to the shaft 4. By this movement, the functional element is moved from the rest position to the working position, this process can be reversed by appropriate counter-movement.

At the end, a functional element 6 is shown in the working position on the shaft 4 and the sliding part 5. The connecting part 7 is between the shaft 4 and the handle 3. In addition, a profiling 8, and a flattened axis 9 and a slot 10 can be seen. In this case, the slot 10 is embedded in the connecting part 7. The flattened axis 9, however, is integrally formed on the handle 2.

The connecting part 7 in this case has two flanks 18, 19 in the upper region, which can be seen from the top view in FIG. Between these two flanks 18, 19 parts of the handle 2, the shaft 4, the sliding part 5 and a lock 11 are attached.

The handle 2 is partially rotatably mounted in a recess of the part 17. The rotational movement of the handle 2 is limited by the latch 11 and corresponding stop points on the handle 3.

Figure 2 shows a partially sectioned view of Figure 1 in a rest position. Again, the handles 2, 3 can be seen, and these are now closer to each other than in Figure 1 and thus cause the functional element 6 is pushed to rest. This happens by a relative movement of the sliding part 5 to the shaft 4th The connecting part 7 is shown partially cut in Figure 2. Due to the sectional view of the connecting part 7 is now easy to see how the lock 11 is arcuately arranged between the two flanks of the connecting part 7 and partially guided in the handle 2. This locking 11 in this case comprises the profiling 8, as well as the locking lug 12. FIG. 3 now shows an overall sectional view of FIG. 2. In addition to the handles 2, 3, the functional element 6, which is in the rest position, and the shaft 4 and the sliding part 5 are again closed detect. In addition, an area consisting of parts of the handles 2, 3, the connecting part 7, as well as the lock 11 is encircled by a circle C.

The points shown in circle C are now shown enlarged again in Figure 4. There are again the handles 2, 3 can be seen, wherein the handle 2 forms a guide 14, in which the lock 11 partially protrudes. The guide 14 has at its upper end a stop 15, which limits the movement of the latch 11.

In addition, the locking lug 12 and the profiling 8 is shown on the latch 11 again. Further, in the handle 2, two bulges 16, 17 can be seen, wherein the bulge 17 receives the formed on the locking coupling element 18 in Figure 4.

In Figure 4 also shows how the latch 11 on the one hand via the locking lug 12 influence on the sliding part 5 and on the other hand during the rotational movement of the handle 2 to handle 3 holds the handle 2 in its position and next due to its counteracting force an accidental Sliding out of the handle 2 over the formed in the connecting part 7 slot 10 on the flattened axis 9 of the handle 2 prevented. FIG. 6 shows the arthroscopic forceps 1, wherein the handle 2 has been pulled towards the handle 3 until the slot 10 releases the flattened axis 9 of the handle 2. Here's how the handle 2 is being removed. In advance, the lock 11, not shown, was first pressed by the handle 2, which was pulled to the handle 3 towards the end 13 of the sliding part 5.

After reaching a certain angular position in which the slot 10, the flattened axis 9 releases and the handle 2 can be pulled down, the latch 11 can be further pushed into the handle 2, in turn, the flattened end 13 of the sliding part 5 is released , The released end 13 is then held by a bracket 20 within a predetermined range of motion held pivotally about a rotation axis 21.

LIST OF REFERENCE NUMBERS

Arthroscopy forceps 34 67

Handle 35 68

Handle 36 69

Shaft 37 70

Sliding part 38 71

Functional element 39 72

Connecting part 40 73

Profiling 41 74

Axis 42 75

Slot 43 76

Lock 44 77

Locking nose 45 78

Late 46 79

Leadership 47

Stop 48 C circle cutout

Recess 49

Recess 50

Bulge 51

Part 52

Bracket 53

54

55

56

57

58

59

60

61

62

63

64

65

66

Claims

claims

1. Surgical instrument, in particular for arthroscopy with

a shaft (4),

- A sliding part (5) and

a lock (11) for holding the sliding part (5) on the shaft (4), the lock (11) comprising a locking nose (12) and a spring,

characterized,

that the locking lug (12) and the spring are integrally formed.

2. Surgical instrument according to claim 1, characterized by a handle (2) for actuating the sliding part, wherein the lock (11) at least partially in the handle (2, 3) is arranged.

3. Surgical instrument according to claim 2, characterized by a coupling for fixing the lock (11) on the handle (2).

4. Surgical instrument according to claim 3, characterized in that the coupling comprises a nose (18) and a recess (16, 17).

5. Surgical instrument according to one of the preceding claims, characterized in that the lock (11) is bow-shaped.

6. Surgical instrument according to one of claims 2 to 5, characterized in that the lock (11) forms a stop which cooperates with a shape of the handle (2) and is suitable for the movement of the lock (11) relative to the handle ( 2) limit.

7. Surgical instrument according to one of the preceding claims, characterized in that the locking comprises a profiling for manual actuation.

8. Surgical instrument according to one of claims 2 to 6, characterized in that another handle is formed integrally with the shaft.

9. A surgical instrument according to claim 8, characterized in that the other handle comprises a flattened axis, which with a

Long hole of the handle cooperates and can be removed in at least one angular position.

10. A method for disassembling the surgical instrument according to one of claims 1 to 9, characterized by the following steps:

- The handle is pulled towards the other handle

- The handle is pulled against the resistance of the lock and at least partially overrun, wherein

- The handle is released at least one angular position by the interaction of flattened axis and the slot with opening and removed from the other handle.