Surgery – Instruments – Cutting – puncturing or piercing
Patent
1996-01-16
1997-10-14
Buiz, Michael
Surgery
Instruments
Cutting, puncturing or piercing
606207, A61B 1734
Patent
active
056766785
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a surgical instrument with at least one jaw part actuatable via a pull or push element. The pull or push element extends through a tube having the at least one jaw part releasably connected to the end thereof, and being surrounded by an outer tube which is slideably seated on the tube.
Tong-like surgical instruments are known in various shapes and designs. These are grasping instruments, biopsy instruments, cutting instruments, needle and thread holders, grasping forceps, dissection forceps, spoon-type forceps, etc. All these instruments have in common that jaw parts are actuated by an actuating device. The jaw parts can be scissors, forceps, cutters, clamps or the like. In most cases, two jaw parts are moveable, but arrangement of only one jaw part which is moveable in relation to a fixed jaw part is also conceivable.
As a rule, these jaw parts are actuated via a pull or push element. The pull element consists, for example, of a wire cord, a pull or push element comprised of wire sections, rods, tubes or the like.
These pull or push elements and simultaneously the corresponding jaw parts are actuated manually via scissor handles or electrically via motors, pneumatically, hydraulically or in a similar way. Here many designs are possible and are to be covered by the present invention.
SUMMARY OF THE INVENTION
All of these aforementioned surgical instruments have to perform very different functions during handling on or in the human body and should, therefore, be designed for as wide a variety of applications as possible. Nowadays, however, in spite of the varied design, it is essential for the surgical instrument to be easy to disassemble into individual parts and to clean. Today, the very high demands made on hygiene and sterilization are unable to be met by the current surgical instruments. Either they are of very complicated design and can, therefore, perform very different functions, but, in turn, are difficult to disassemble and reassemble. Or, they are of simple construction and can be taken apart, but, as a rule, only fulfill a single function and are difficult to handle.
Surgical instruments of this kind are described in EP 0 546 767A2. Herein the actual tong- or scissor-shaped tools are rotatably mounted on a holder which is permanently fixed in a tube shaft of the instrument, for example, by crimping the tube shaft. With this instrument, the holders with the tools mounted thereon are not exchangeable and so the entire instrument has to be exchanged when changing over to another instrument. Disassembly for cleaning purposes is difficult.
Such tong-shaped instruments are described in W091/02493. Herein the tools are releasably mounted on a tube shaft. However, insertion of the tools is difficult because the tools are held on a bearing shaft and have to be fitted with a toothing in toothed racks which are displaceably mounted on the instrument itself. It is, therefore, extremely difficult to exchange these tools.
Departing from this prior art, the object underlying the invention is to so design a surgical instrument of the generic kind for a variety of applications that, on the one hand, it can be very thoroughly cleaned or sterilized and, on the other hand, the tool can be exchanged in a simple way.
This object is accomplished in accordance with the invention in a surgical instrument of the kind described at the outset in accordance with a first preferred embodiment in that the jaw part is connected to a holder in the fashion of a rotary joint, in that the holder is releasably coupled with the tube, and in that the holder has a projection which in the operational position is seated in a cavity of the tube and is held by snap legs of the tube.
This object is accomplished in accordance with the invention in a surgical instrument of the kind described at the outset in accordance with a second preferred embodiment in that the jaw part is connected to a holder in the fashion of a rotary joint, in that the holder is releasably coupled with the tube,
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patent: 4273128 (1981-06-01), Lary
patent: 4509517 (1985-04-01), Zibelin
patent: 4655219 (1987-04-01), Petruzzi
patent: 4848338 (1989-07-01), De Satnick et al.
patent: 5254130 (1993-10-01), Poncet et al.
patent: 5366466 (1994-11-01), Christian et al.
patent: 5383895 (1995-01-01), Holmes et al.
patent: 5433725 (1995-07-01), Christian et al.
patent: 5509923 (1996-04-01), Middleman et al.
Buiz Michael
Connolly Mulcare Nancy
Hoppin Ralph F.
Lipsitz Barry R.
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