Surgery – Instruments – Forceps
Reexamination Certificate
1999-08-30
2001-04-03
Buiz, Michael (Department: 3731)
Surgery
Instruments
Forceps
Reexamination Certificate
active
06210424
ABSTRACT:
This invention relates generally to a surgical device. The invention concerns specifically a surgical device comprising:
an elongate, flexible and tubular arm having a distal end and a proximal end;
a flexible pulling means which is movably arranged inside the arm essentially over the entire length thereof;
a tool which is arranged at the distal end of the arm and comprises at least two parts, which are arranged movable in relation to each other by operation of said pulling means; and
an operating means which is arranged at the proximal end of the arm to operate said pulling means and, thus, said tool.
FIELD OF THE INVENTION AND BACKGROUND ART
In surgical operations, use is frequently made of special surgical devices which can be adjusted to allow access to target areas or spaces which are otherwise difficult to reach. For instance, in so-called endoscopy, use is often made of devices comprising a tubular, elongate arm which is provided with a tool arranged at its one end, the tool being operable by means of a pull rod which extends inside the arm essentially over the entire length thereof. Moreover, the arm can be bent to be adjusted to the particular application.
A problem is the fact that these devices obtain remaining deformations owing to bendings. Consequently, the more the device is used, the more remaining deformations. Thus, it will be more and more difficult to give the device the desired shape.
A further problem is the fact that the pull rod in the tubular arm slides more and more sluggishly, the more deformations the device obtains.
There is thus a need for an improved surgical device of the type described by way of introduction, which obviates the above-mentioned problems associated with prior art technique.
An object of the present invention therefore is to provide a surgical device, which can easily be given its original shape.
SUMMARY OF THE INVENTION
The above-mentioned object is achieved by a surgical device which is essentially characterised in that said arm is made of a material which resumes its shape by heating, preferably a memory metal, which has a transformation temperature that allows the arm to be deformable to the desired shape at room temperature and to keep the thus obtained shape at a patient's body temperature during use of the device, so as then to allow resumption of its original shape when it is exposed to a temperature exceeding the body temperature.
Further developments of the surgical device are evident from the distinguishing features stated in the sub-claims.
Several advantages are achieved by the invention, for instance, the device is ready for use after sterilisation by autoclave treatment, in which it resumes its original shape.
Further advantages and distinguishing features will appear from the following specification.
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patent: 4601283 (1986-07-01), Chikama
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patent: 5403342 (1995-04-01), Tovey et al.
patent: 0567146A3 (1993-10-01), None
patent: 0631759A1 (1995-01-01), None
Bui Vy Qi
Buiz Michael
Burns Doane Swecker & Mathis L.L.P.
Dicamed AB
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