FR2778554A1 - Shaped bandage for surgical implant - Google Patents

Abstract

The device comprises bandage strips (2) assembled with a gathering line (4) passing through openings in the side of the pleated form (6). The length of the segments is greater than the circumference of the opened device, with the width less than the devices' radius.

Description

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IMPLANTABLE TEXTILE PROSTHESIS.

  The present invention relates to a textile prosthesis implantable in the body of the plug or plug type intended in particular, but not exclusively, for the

  resorption of hernias in the abdominal wall.

  Different textile means have been proposed to constitute prostheses in restorative surgery. They consist of wide mesh fabrics that can be colonized by tissue cells. In the case of a repair according to the plug technique, it is known to constitute a cone whose external face is pleated and to introduce the top of the cone into the opening to close the orifice. Such prostheses are essentially rigid and cannot marry the periphery of the hole, in particular when the latter is irregular, voids remaining between the abdominal wall and the prosthesis which can lead to hernias.

recurrent.

  To remedy this drawback, it has been proposed in EP-

  A-614650 to constitute an implant by thermoforming a cone whose external surface is pleated which gives it flexibility and to introduce inside the cone filling stiffeners which give the implant the necessary rigidity when the implant is introduced into the wall defect. The prosthesis consists of a biocompatible mesh fabric and the meshes are colonized by the tissues so as to firmly fix the implant on the abdominal wall. The stiffeners are formed by petals

  angularly offset mesh fabric.

  However, such an implant has a relatively complex structure and installation and can only be easily adapted to openings of variable dimensions. It can, moreover, if it is of excessive diameter cause abrasion of the tissues

  surrounding, or even a perforation of the femoral artery.

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  A first object of the invention is to overcome these drawbacks and to propose an implant for easy placement and

  adaptable to the opening to be closed.

  According to the invention, the implantable textile prosthesis forming a truncated cone whose outer wall is pleated is characterized in that it consists of a knitted fabric of circular shape on which is fixed, in the radial direction and according to a determined pitch, a textile strip whose length is greater than the perimeter of the knitting circle and

  whose width is less than the radius of the circle.

  The inner band thus forms a series of gathers which, when the circular knit is folded around its center to form a cone or truncated cone, fills the cone and gives it the necessary rigidity. Furthermore, the inner strip does not extend over the entire height of the cone but leaves the top of the latter clear so as to constitute the small base of the truncated cone. A first advantage of the implant according to the invention is that it can be delivered to

dish to the surgeon.

  According to another characteristic of the invention, a link is passed through the gathers. Thus, the surgeon, by pulling on the link can open more or less the angle of the cone in order to adapt its outside diameter to the dimension of the opening to be closed. The link is then tied in order to

stabilize the size of the product.

  Thanks to this link, it is also possible to completely compress the implant by pulling on the link to facilitate its introduction into the hernia and then to release the link to allow the implant to expand to the diameter limited by the knot or section the

  link to allow the implant to flourish.

  Other characteristics and advantages of the invention

  will appear during the following description of a

  particular embodiment, given only by way of nonlimiting example, with reference to the drawings which represent: - Figure 1, a top view of a prosthesis according to the invention in the rest state; - Figure 2, a sectional view along line II-II of Figure 1; - Figure 3, a view of the implant in the closed position

  before its introduction into the abdominal wall.

  In FIG. 1, it can be seen that the prosthesis comprises a knitted fabric 1 of generally circular shape (possibly scalloped), the diameter of which is approximately eight centimeters, inside which is fixed a band 2 whose length is greater than the circumference knitting so that, flat, the strip 2 forms gathers 6 which are preferably folded around their fixing lines 5 for reasons of space. The edges of knitting 1 can be scalloped

  to reach the same level after folding.

  The knit 1 is, for example a knit of polypropylene monofilaments. It is constituted by a single layer or by several layers if one wishes to obtain a higher rigidity. The fixing lines are preferably distributed in a regular pitch so as to form a determined number of gathers and, for example six or eight. The fixing can be done by sewing, gluing or ultrasonic welding. The fixing lines have a length of 2 to 3.5 cm so that the strip stops at a distance of five to ten millimeters from the center 3 of the knit which will form, after

  folding, the small base of the truncated cone 1.

  The strip of fabric 2 covers over the greater part of its height, the internal surface of the cone, forming gathers

successive 6.

  According to a characteristic of the invention, a link 4 is passed through the gathers formed in the strip 2. Its purpose, by a determined traction, is to form a cone such as that which is represented in FIG. 3, the angle of which at

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  vertex is more or less open depending on the traction exerted on the link. This angle adjusted by traction on the link 4 is a function of the surface of the orifice to be closed. The surgeon can also, during the introduction pull the link as much as possible in order to facilitate its introduction into the hernia and then remove the link by letting the implant unfold freely in the orifice due to the elasticity

  fabric on the one hand and gathers on the other.

  The link established prior to the insertion of the implant into the body determines a certain diameter which limits the expansion force of the plug, and consequently the

  stresses exerted on natural fabrics.

  It goes without saying that many variations can be made, in particular by substitution of technical means

  equivalent, without departing from the scope of the invention.

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Claims (4)

  1. Implantable textile prosthesis forming a cone whose outer wall is pleated, characterized in that it consists of a knit (1) of generally circular shape on which is fixed, in radial direction and according to a determined pitch, a textile strip (2) , forming gathers (6), the length of which is greater than the perimeter of the knitting circle and the   width is less than the radius of knitting (1).   2 prosthesis according to claim 1, characterized in that a link (4) is passed through the strip (2), to the inside of the gathers (6).   3 Prosthesis according to claim 1 or 2, characterized in that the strip (2) extends over part of the height of the inner surface of the knitted fabric (1), on which it is fixed by radial lines (5) of fixation.   4 Prosthesis according to one of claims 2 or 3,   characterized in that the diameter of the prosthesis is adapted to the opening to be closed by forming a node in the link (4).     Prosthesis according to one of claims 2 or 3,   characterized in that it is completely compressed   by pulling on the link (4) before its insertion.