Surgery – Instruments – Surgical mesh – connector – clip – clamp or band
Patent
1993-11-12
1995-11-07
Jackson, Gary
Surgery
Instruments
Surgical mesh, connector, clip, clamp or band
606150, A61B 1704
Patent
active
054644143
DESCRIPTION:
BRIEF SUMMARY
This is a continuation of application Ser. No. PCT/H692/00046, filed Nov.
5, 1992.
TECHNICAL FIELD
The invention relates to a disposable approximator for approaching nerve-endings, especially for facilitating suturing and replacement of injured nerves, containing metal surgical hooks which are known in the art.
BACKGROUND ART
The aim of surgeons has always been to treat injured nerves in a proper way, however, only in the last 20 years have surgical techniques, corresponding sewing materials, magnifying means needed for the accurate stitching of fine structures, and operating microscopes established suitable conditions. In the field of microsurgery pressing clips and different approximators for sewing micro-blood vessels already exist the force of pressure of which has been calibrated with utmost care. By means of said devices ends of blood vessels can be laid near to one another, so that sewing can be performed easily. As a consequence, there is no need to hold the ends of blood vessels by means of catgut of 20-30 microns, as this process may lead to the rupture of the catgut. The approximator is taking over the function for the full period of suturing. The approximator enables rotation of the blood vessel, accordingly concentric suturing becomes possible. With stitches of nerves, due to the fine thready structure of the nerves, there is no possibility to lay nerve-endings next to one another by means of clips arranged on the nerve-endings or by means of interconnecting slides.
Prior art devices tried to achieve approximation with thin needles passed through both nerve-endings transversally. By using this method we damaged thin, so called axial threads within the nerves i.e., fascicular structures. An alternative possibility is based on the recognition, that the envelope epineurium enclosing the nerve is relatively strong and by means of hooks hooked therein nerve-endings can be brought together without considerable damage. A device serving this purpose exists. It is a product of the German Company S&T. Said device consists of three components. It is made of metal. It is suitable for repeated use and it is most expensive. In case of multiple applications, fine surgical hooks may get damaged and subjected to deformation. Accordingly, when used repeatedly, it is dubious whether they can yield the advantages which can be achieved in the first application.
Due to an increase in diseases transferred with blood and bodily fluids (e.g. AIDS, Hepatitis etc.) use of disposable means seems to be more safe, and accordingly more advantageous. Moreover, problems appear in cleaning, sterilization, and packing of repeatedly used devices after use. In use further damage may occur in the structure of the microsurgical device, even when manipulated with utmost care. Repeated application of expensive instruments may become uncertain. For example, the device mentioned above marketed by the German Company S&T can be displaced on a smooth leg, however, there are no mechanical means provided which prevent sliding back.
SUMMARY OF THE INVENTION
The aim of the invention is to eliminate the drawbacks of approximators for approaching nerve-endings which have been developed up to now and to provide for a more inexpensive device which complies with biomechanical demands, which can be manipulated and applied easily, which is disposable and which can be mass, produced and used widely. A further requirement is to provide a simpler and quicker technique and to increase safety.
In basic conception, the invention is suitable for sanitary and surgical purposes, comprises elements made of metal and some synthetic material, and forms a complex unit. It does not contain independent elements. Accordingly, prior to use assembly becomes superfluous.
In accordance with the invention there is provided an approximator with a sliding leg made of some synthetic material suitable for hygiene and surgery. One surface of said sliding leg has a structural formation allowing unidirectional displacement. At the end of the sliding leg, facing the d
REFERENCES:
patent: 4617702 (1986-10-01), Diederich, Jr.
patent: 4635636 (1987-01-01), Goldstein
patent: 4723548 (1988-02-01), Lalonde
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