Device for performing endoscopic operations by means of a sheath

Surgery – Instruments

Patent

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600 37, A61B 1700

Patent

active

058369368

DESCRIPTION:

BRIEF SUMMARY
SPECIFICATION



FIELD OF THE INVENTION

The present invention relates to a device for performing endoscopic operations, including a flexible sheath receiving detached parts.


BACKGROUND OF THE INVENTION

An endoscopic operation is frequently performed in order to detach and remove an endogenic sample. To this end the various cutting instruments have been proposed for detaching and removing endogenic samples, e.g. of tissue, organs or parts of organs, tumors, or calculi from the bladder, the gall bladder, the kidneys, or similar parts of the organism.
A serious problem is entrainment by these instruments which consists in the aspect that an infection of the surrounding regions of the body or of the surrounding healthy tissue along the duct through the tegument of the body as a result of the removal procedure cannot be definitely precluded. The risk of an infection occurs particularly when malignant ulcers are to be detached and removed.
This risk must be avoided on principle by the provision that upon termination of the detaching procedure, the sample to be taken is introduced into a container introduced into the body, that this container is closed and then removed out of the body, together with the detached sample, through passages either available or created for the operation.
From the European Patent EP 0 507 588 A1 an endoscopic instrument for medical applications has become known which comprises a bag adapted to be closed, which is disposed at the distal end of the instrument and which may be introduced into the body interior through a body orifice and, in open condition, permits the introduction of detached samples of the organism. This bag may be closed by operation of an operating mechanism provided on the proximal end. The closed bag may then be removed from the body interior, without running the risk of an infection of parts of the body as a result of dispersion of pathogenic germs and/or cancerous cells etc.
The document WO 92/14407 discloses an extraction bag for endoscopic surgery, which is mounted on an instrument adapted to be introduced into and removal in or from the body interior, and which is provided with an opening which may be closed again.
Moreover, the document WO 92/11816 describes a container which may be introduced into the body interior, either through natural or artificially established body orifice, and serves there as bag-shaped container for receiving tissue, organs or parts of organs, tumors, calculus-shaped deposits and sediments such as nephroliths, or other endogenic samples, which have been treated by various medical auxiliaries. In this case, too, a bag is involved which is provided with a single opening and which, as such, consists of a rigid material so that to a certain extent reducing operations may be performed on the objects introduced into the bag.
Finally, the German Patent DE 42 20 785 A1 discloses a laparoscopic bag having a funnel-shaped configuration, which provides for a collection of detached parts of the body inside a narrow funnel-shaped converging region. Like the afore-mentioned extraction bags, this design, too, has only a single opening.
Even though the known designs for extraction bags, which have been presented in the foregoing, have as an objective that samples detached inside the body, which possibly contain substances or cells which are harmful to the body, are removed from the interior of the body while the risk of an infection of the surrounding parts of the body due to dispersion of pathogenic germs, malignant cells, bacteria, etc. is avoided. And yet these known containers entail certain disadvantages:
Firstly, the intracorporeal charging of the proposed extraction bags is a complex operation: the known bags have, as a matter of fact, only a single opening into which the detached sample particles must be "scooped" by means of specific instruments. This procedure requires a certain space for unrestricted movement, which, however, is available inside the body, i.e. in a body cavity, in rare cases only.
When endogenic samples are taken by mea

REFERENCES:
patent: 5176687 (1993-01-01), Masson et al.
patent: 5279548 (1994-01-01), Keine
patent: 5480410 (1996-01-01), Cuschieri

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