Surgery – Instruments – Cutting – puncturing or piercing
Patent
1997-07-02
1998-09-22
Buiz, Michael
Surgery
Instruments
Cutting, puncturing or piercing
606205, 606207, 606208, 30341, A61B 1728
Patent
active
058108653
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a surgical instrument having at least one jaw part which is rotatable around an axis.
Such surgical instruments are known and available on the market in many forms and embodiments. The corresponding jaw parts can serve for cutting, clamping, twisting-off, shearing, or the like. As a rule, they serve for performing given surgical interventions in man or animal. These instruments and their development have increased considerably in importance, as a result in particular of endoscopy.
As example, reference is had here to a surgical instrument in accordance with P 43 32 497.5.
In all of these instruments, the jaw parts are connected by a corresponding pull or push element with actuating members, for instance scissor arms. Upon actuation of the scissor arms, the jaw parts are opened and closed. In this connection, either both jaw parts can be movable or one jaw part can be stationary and the other jaw part moved. As soon as the jaw parts are worn out, the instrument is thrown away.
There are also available on the market disposable instruments which are intended only for one operation and are then discarded. These disposable instruments are supplied in sterile packings, so that the disposing of the packing and of the instrument itself represents a considerable expense and is very problematic based on environmental considerations.
The object of the present invention is to provide a surgical instrument which can be repeatedly reused and in which wear of the jaw parts does not constitute a problem. Furthermore, the possibility of sterilizing the instrument is to be facilitated.
In order to achieve this object, the jaw part is connected via a receiver to the pin and the jaw part is detachably fastened with respect to the receiver.
The basic concept of the present invention is that, particularly when worn, the jaw part can be detached from the receiver and be replaced by a new jaw part. In this way, the rest of the surgical instrument is fully retained and can be sterilized and repeatedly reused. Since the jaw part constitutes only an extremely slight portion of the manufacture work and cost of the surgical instrument, the present invention results in a substantial reduction of the cost, particularly in hospitals.
As jaw part, a large number of embodiments can enter into consideration. It need merely be seen to it that the action of the jaw parts does not conflict with their detachable connection. In other words, the jaw part should not carry out any activity in which a strong pull is exerted on the jaw parts. In particular, there enters into consideration a development of the jaw parts as scissor blades, as well as jaw parts which are used today in biopsy forceps.
The rest of the instrument is preferably so designed that it can easily be sterilized. For this, a surgical instrument in accordance with P 43 32 497.5 offers itself.
After detachment from the receiver, the jaw parts can either be thrown away and replaced by new ones, or they can be sterilized and/or reworked. A dull scissor blade can, for instance, be ground fresh and used again. Thus, the invention contributes considerably to reducing waste, in which connection, furthermore, only a slight amount of packing is necessary for the surgical instrument and the jaw parts. Of course, it is also possible to use on the same instrument different jaw parts with which different activities can be carried out.
In a preferred embodiment, the jaw part has an extension with a guide slot which cooperates with a guide arm on a support plate of the receiver. This guide arm effects a targeted fastening of the jaw part to the receiver or a corresponding detent element. Therefore, there should also be provided on the receiver, in addition, a shoulder against which the jaw part strikes for the limiting of its motion.
For the fastening by detent of the jaw part with respect to the receiver, it is preferred to provide in the region of the guide slot a detent hole which cooperates with a detent element. This detent elemen
REFERENCES:
patent: 1577880 (1926-03-01), Stuart
patent: 2069636 (1937-02-01), Wilson
patent: 2725629 (1955-12-01), Todhunter
Koscher Stefan
Wurtz Johann
Buiz Michael
Reip David O.
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