Source: https://patents.google.com/patent/EP0898944B1/en
Timestamp: 2018-03-20 21:33:44
Document Index: 333584436

Matched Legal Cases: ['arts 1', 'art 3', 'arts 1', 'art 3', 'arts 1', 'arts 1', 'arts 1', 'arts 1']

EP0898944B1 - Prosthetic device for the repair of a hernia - Google Patents
EP0898944B1
EP0898944B1 EP19980306855 EP98306855A EP0898944B1 EP 0898944 B1 EP0898944 B1 EP 0898944B1 EP 19980306855 EP19980306855 EP 19980306855 EP 98306855 A EP98306855 A EP 98306855A EP 0898944 B1 EP0898944 B1 EP 0898944B1
EP19980306855
EP0898944A3 (en )
EP0898944A2 (en )
Other known prostheses are constituted by cylindrical devices terminating at one end with prosthesis sheets for suturing by the surgeon to the non-weakened muscles on either side of the hernial canal to complement the obturation provided by the device. In that respect reference may advantageously be made to U.S. Pat. Nos. 5,141,515; 5,147,374; 5,219,077; and U.S. 5,249,682.
WO 92/19162 describes a surgical implantation device according to the preamble of claim 1 which is delivered to a hernial rupture site laproscopically. WO 93/13712 describes a septal closure device comprising a deformable frame.
The invention, therefore, provides a prosthesis device to repair a hernia, the device comprising a hernia canal insert having a proximal end and distal end; the proximal end being attached to a collar and the distal end being attached to and covered by a base, characterised in that the canal insert has a passage between the proximal end and the distal end having a geometric cross-section of sufficient size to allow insertion of a finger or instrument for positioning of the device into a hernia canal.
Figure 1 is a prospective view of the first embodiment of the hernia prosthesis of the invention (1).
Figure 2 is an illustration showing the top view of the first embodiment of the invention (1).
Figure 3 is a perspective view showing the canal insert (2) place within a hernial canal with the base (9) shown in phantom implaced intra-abdominally.
Figure 4 is a cross-sectional view illustrating a first possible embodiment of the invention (1).
Figure 5 is a cross-sectional view illustrating the placement of the first possible embodiment of the invention (1) implanted in the abdominal wall(517).
Figure 6 is a prospective view of the second possible embodiment of the invention (101) having a canal (104).
Figure 7 is a top view of the second possible embodiment of invention (101) .
Figure 8 is a perspective view of the second possible embodiment of the invention(101) illustrating the canal insert(102) placed within a hernial canal, with the sheet(109) shown in phantom implaced intra-abdominally.
Figure 9 is a cross-section view illustrating the second possible embodiment of the invention(101).
Figure 10 is a cross-sectional view illustrating the placement of the second possible embodiment of the invention in the abdominal wall(117).
Figure 11 is a perspective view of yet another embodiment of the present invention in which the collar (7) and/or canal insert (2) is not centered on the base (9).
A perspective of one embodiment of the invention is shown in Figure 1. The first embodiment of the invention 1 illustrated in Figure 1 and shown in cross-section in Figure 4 comprises three main parts: a cannular part or insert 2, which has a proximal end 3 and a distal end 5. The proximal end 3 is attached to the second part, a collar 7. The distal end 5 is attached to the third part, base 9, which is to be inserted inside the abdominal cavity to constitute a barrier at the internal canal of the hernial canal.
According to the invention, the hernia canal insert 2 between the proximal end and the distal end 5 has a passage 4 having a geometric cross-section of sufficient size to allow the insertion of a finger or instrument (particularly preferred are passages that are cylindrical in shape). The passage 4 is shown in Figures 1, 4 and 5.
Of course the collar 7 and the base 9 may be of a shape other than circularly symmetrical. In particular the collar 7 may extend in one or more directions as one or more segments, thereby facilitating suturing in those directions. The collar 7 may also be notched (i.e. with a key-hole 11, semi-circular notch 13, or other notch shape) to facilitate the passage of the spermatic cord when the device is used in indirect hernia procedures as is illustrated in Figure 3. The distal end 5 of canal insert 2 to be positioned on the inside of the cavity, is attached to and extended by the base 9 which may be a single sheet of material.
In an alternate embodiment of the present invention 101 the base 109 may be composed of a double sheet (as is illustrated in cross-section in Figures 6-10). The two layers 111 and 113, are folded over one another to form a substantially flat pouch 115, of circular or elliptical periphery, for example. The second embodiment of the invention as shown in cross-section in Figure 9 comprises a canal insert 102 having a first end 103 and second ends 105. The first end 103 is attached to a collar 107 and the base 109 is attached to the proximal end of the canal insert 102. The base 109 comprises at least two sheets respectively 111 and 113. The sheets are attached and form a pouch 115. The passage 104 is designed to allow a finger or surgical instrument to be inserted into the pouch 115.
The device-forming parts 1, 2 and the sheet(s) of part 3 are made of one or more biocompatable sheet materials. The material(s) from which these parts are made is/are selected so as to be inert and infection-resistant, and so as to be quickly incorporated into tissue. By way of example, the device-forming parts 1, 2 and the sheet(s) of part 3 may be made of the same or different synthetic or natural material. The material(s) from which these parts are made is selected so as to be inert and infection-resistant, and to be biocompatable with tissue. Numerous biocompatable absorbable and nonabsorbable materials can be used for parts 1, 2 and 3. Suitable nonabsorbable materials for use in parts 1, 2 and 3 include, but are not limited to, cotton, linen, silk, polyamides (polyhexamethylene adipamide (nylon 66), polyhexamethylene sebacamide (nylon 610), polycapramide (nylon 6), polydodecanamide (nylon 12) and polyhexamethylene isophthalamide (nylon 61) copolymers and blends thereof), polyesters (e.g. polyethylene terephthalate, polybutyl terphthalate, copolymers and blends thereof), fluoropolymers (e.g. polytetrafluoroethylene) and polyolefins (e.g. polypropylene including isotactic and syndiotactic polypropylene and blends thereof, as well as, blends composed predominately of isotactic or syndiotactic polypropylene blended with heterotactic polypropylene and polyethylene). Suitable absorbable materials for use in parts 1, 2 and 3 include, but are not limited to, homopolymers and copolymers of glycolide, lactide (which includes L-, D-, and meso- forms of lactide and mixtures thereof), ε-caprolactone, p-dioxanone, trimethylene carbonate, 1,4-dioxepan-2-one, poly(alkylene oxalate), and mixtures of such polymers with each other and with other compatible absorbable compositions as those described; for example, in US 3,636,952 and US 2,683, 136.
The sheets that comprise parts 1, 2 and 3 may be constructed in a variety of ways and may be films, felts, knits, wovens, crochets, braided materials or combinations thereof. Numerous surgical meshes, nets or films have been described in the literature and reference may be made to the following patents: US 2,761,444; US 3,054,406; US 3,124,136; US 4,347,847; US 4,633,873; US 4,769,038; US 5,092,884; US 5,292,328; US 5,569,273; PCT/GB95/01786 and EP 0 698 395 A1. Examples of suitable sheet materials include but are not limited to, polyester, polytetrafluoroethylene, expanded polytetrafluoroethylene or polypropylene mesh (such as Prolene™ Surgical Mesh from Johnson & Johnson), etc. The sheets will preferably be surgical mesh material. Surgical mesh materials are commonly knitted monofilaments, but may also be multifilaments. Additionally, the size of the filaments used to manufacture surgical meshes may vary depending on the .structure and desired properties of the knitted material.
In order to insert the prosthesis device in hernial canal 519, in the abdominal wall 517, the surgeon, having dissected the peritoneal sac 521 and pushing it back into the cavity, then bunches base 9 into a tubular shape and introduces the base 9 into the hernial cavity by pushing the base through the hernia canal 519 using a finger inserted into passage 4. The surgeon will then push the base 9 into the peritoneal cavity. The surgeon's finger will temporarily push the canal insert 2 into the interior of the peritoneal cavity to create additional space to allow the base 9 to fully deploy against the inside wall of the abdomen 523. As illustrated in Figure 5 when finally positioned in the patient canal insert 2 is positioned in such a way that it extends through hernial canal 519, the base 9 being brought to bear on the inside of the abdominal wall and the collar 7 will be positioned on the outside of the abdominal wall 525. The second embodiment of the invention is inserted in a different manner.
The second embodiment of the invention 101 shown in Figure 10 is inserted into the hernial canal 119, the surgeon, having dissected the peritoneal sac 121 and pushing it back into the cavity, then introduces the base 109 into the outside of the abdominal cavity, while inserting the canal insert in such a way that it extends through the hernial canal 119, the collar 107 being brought to bear on the outside of the abdominal wall 117. The surgeon then introduces the end of a surgical instrument (i.e. a cannula) or his finger into the pouch 115 through the passage 104 and deploys the patch so that the two sheets 111 and 113 are properly superposed and inserted, under the effect of intra-abdominal pressure, against the inside face of the abdominal cavity 123.
Once the pouch 115 is correctly deployed against the inside face of the wall of the abdominal cavity 123, the surgeon may suture the collar 107 to the abdominal wall 117.
The prosthetic device of the present invention may be manufactured by any appropriate technique known in the art. For Example the mesh may be cut into the appropriate shape by a cutting blade, hot knife, or ultrasonic cutting device (the last two cutting devices may provide more uniform edges). The three dimensional structure of the device can be formed by shaping a sheet of mesh over a heated tool and cooling the sheet material to set the shape. In the case of polypropylene knitted mesh, the mesh may be thermoformed over a heated tool in the range of from about 80°C (175° F) to about 160°C (320° F) and preferably about 118°C (245° F) under suitable pressure for a suitable amount of time (at least 10 seconds and preferably less than 30 minutes). The thermoforming should be conducted in a manner that does not distort or weaken the mesh structure. Generally polypropylene mesh should be compressed between a male and female forming tool which are closed together at a speed in the range of from about 2 to about 25 cm per minute and preferable at a speed of in the range of from about 5 to about 7.5 cm per minute. Polypropylene meshes should generally be heated for in the range of from about 2 to about 5 minutes and cooled to below room temperature to set the shape. Currently it is preferred to cool polypropylene mesh to 13°C (55° F) or less for in the range of from about 2 to about 5 minutes. The shaped sheet may then be attached to the base by an appropriate attachment means (i.e. sewing, gluing or welding). One appropriate method for attaching two sheets polypropylene mesh is to ultrasonically weld the two pieces together. It is advisable with some materials (i.e. polypropylene mesh) to support the three dimensional shape in its package to insure the device maintains its shape.
A prosthesis device (1) to repair a hernia, the device (1) comprising a hernia canal insert (2) having a proximal end (3) and distal end (5); the proximal end (3) being attached to a collar (7) and the distal end (5) being attached to and covered by a base (9),
characterised in that the canal insert (2) has a passage (4, 104) between the proximal end (3) and the distal end (5) having a geometric cross-section of sufficient size to allow insertion of a finger or instrument for positioning of the device into a hernia canal.
A device (1) according to claim 1, characterised in that the base (9) is a sheet.
A device (1) according to claim 1, characterised in that the base (9) is a sheet composed of two layers (111, 113).
A device (1) according to claim 3, characterised in that the two layers form a pouch (115).
A device (1) according to claim 4, characterised in that the passage (104) is formed through the canal insert (2) into the pouch (115).
A device (1) according to claim 4, characterised in that the pouch (115) is filled with a fiber or foam-type prosthetic material.
A device (1) according to claim 1 characterised in that the collar (7) is notched.
EP19980306855 1997-08-27 1998-08-26 Prosthetic device for the repair of a hernia Active EP0898944B1 (en)
US57093P 1997-08-27
US136036P 1998-08-19
EP0898944A2 true EP0898944A2 (en) 1999-03-03
EP0898944A3 true EP0898944A3 (en) 1999-08-04
EP0898944B1 true EP0898944B1 (en) 2004-05-26
EP19980306855 Active EP0898944B1 (en) 1997-08-27 1998-08-26 Prosthetic device for the repair of a hernia
US6241768B1 (en) 2001-06-05 grant
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