Surgery – Instruments – Surgical mesh – connector – clip – clamp or band
Patent
1999-04-02
2000-07-18
Jackson, Gary
Surgery
Instruments
Surgical mesh, connector, clip, clamp or band
54243, A61B 1704
Patent
active
060901160
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a textile material and, in particular, to a surgical mesh of knit construction fabricated from a polypropylene monofilament yarn.
BACKGROUND
Hernia repairs are among the more common surgical operations which may employ a mesh fabric prosthesis. Such mesh fabric prostheses are also used in other surgical procedures including the repair of anatomical defects of the abdominal wall, diaphragm, and chest wall, correction of defects in the genitourinary system, and repair of traumatically damaged organs such as the spleen, liver or kidney.
Mesh fabrics for use in connection with hernia repairs are disclosed in U.S. Pat. Nos. 5,292,328, 4,769,038 and 2,671,444. Knitted and woven fabrics constructed from a variety of synthetic fibers and the use of the fabrics in surgical repair are also discussed in U.S. Pat. Nos. 3,054,406; 3,124,136; 4,193,137; 4,347,847; 4,452,245; 4,520,821; 4,633,873; 4,652,264; 4,655,221; 4,838,884;. 5,002,551; and European Patent Application No. 334,046.
It is desirable for a surgical mesh fabric prosthesis to exhibit certain properties and characteristics. In particular, the mesh should have a burst strength sufficient to ensure that the mesh does not break or tear after insertion into a patient. The mesh should also have a pore size which allows tissue to penetrate or "grow through" the mesh, after the mesh has been inserted into a patient. In addition, the mesh should be constructed so as to maximize its flexibility, thereby facilitating the insertion of the mesh prosthesis into a patient during a surgical operation.
It is an object of the present invention to provided a knitted surgical mesh having a high burst strength and large pore size, which has a greater flexibility than known knitted surgical mesh fabrics.
These and other objects and advantages of the invention will become more fully apparent from the description and claims which follow or may be learned by the practice of the invention.
SUMMARY OF THE INVENTION
The present invention is directed to a knitted surgical mesh formed from a yarn. The knitted mesh has from 11 to 13 courses per inch and from 8 to 10 wales per inch, a flexibility of from 10 to 16 gfcm/cm, a burst strength greater than 175 pounds per square inch, and a pore size percentage greater than 37%.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the manner in which the above-recited and other advantages and objects of the invention are obtained and can be appreciated, a more particular description of the invention briefly described above will be rendered by reference to a specific embodiment thereof which is illustrated in the appended drawings. Understanding that these drawings depict only a typical embodiment of the invention and are not therefore to be considered limiting of its scope, the invention and the presently understood best mode thereof will be described and explained with additional specificity and detail through the use of the accompanying drawings.
FIG. 1 is a diagram showing a knitted surgical mesh, in accordance with a preferred embodiment of the present invention.
FIG. 2 is an enlarged view of a portion of the surgical mesh shown in FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The surgical mesh of this invention is preferably fabricated from a yarn which is already accepted for use as a suture material. In a preferred embodiment, the surgical mesh is fabricated from a monofilament yarn formed from a polypropylene resin, such as that disclosed in U.S. Pat. No. 4,911,165, entitled "Pliablized Polypropylene Surgical Filaments" and assigned to Ethicon, Inc., the contents of which is hereby incorporated in its entirety by reference. The preferred monofilament polypropylene yarn used has a denier of from about 30 to 300, and more preferably a denier of about 141. Alternatively, a multifilament yarn, such as a multifilament polypropylene yarn may be used to fabricate a surgical mesh in accordance with the present invention. In still further alternate embodiments, the yarn used to form t
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D'Aversa Margaret M.
Dougherty Robert
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