Hernia mesh patch

Details Hernia mesh patch Hernia mesh patch

1999-05-04

2001-05-01

Jackson, Gary (Department: 3731)

Surgery

Instruments

Surgical mesh, connector, clip, clamp or band

C128S898000, C602S044000, C602S058000

Reexamination Certificate

active

06224616

ABSTRACT:

TECHNICAL FIELD
Surgically implantable mesh patches for the repair of inguinal and other abdominal wall hernias, which are intended for permanent placement within a patient's body space, have been provided and used previously. Tension free surgical repairs of hernias have been developed using-synthetic mesh materials to bridge and to patch hernia defects. These repairs resulted in both a decrease in the recurrence rate as well as a decrease in the amount of a patient's post operative discomfort. Patients undergoing these more advanced procedures were able and are able to resume their normal activities sooner.
Some of these earlier techniques are somewhat complicated. Several use a plug or a locating member to fit within the hernia defect itself. Also many of these earlier techniques were designed specifically for use in laparoscopic repair of hernias. Moreover, many of the prior inventions required suturing to the patient's body tissue. Although these medical advances are acknowledged for their usefulness and success, there remained a need or needs for more improvements in the surgical repair of hernias.
DISCLOSURE OF INVENTION
A hernia mesh patch for use in the surgical repair of a patient's inguinal, or other abdominal wall hernias, is disclosed for permanent placement within a patient's body space. This hernia mesh patch has top and bottom layers of an inert, synthetic mesh, preferably polypropylene mesh, secured to each other with a seam. The seam surrounds and defines a pocket. The top layer has a transverse cut or slit opening into the interior pocket or pouch volume of this patch.
To serve a spring function, an implantable inert monofilament fiber, arranged in an oval, ovoid, loop, or ring configuration, having a circumference slightly greater than the circumference of the interior pocket volume of this patch, is inserted into this pocket to keep the hernia mesh patch expanded under tension in a planar configuration. A border on at least one of the layers extends outward past the seam. The border preferably has slits to fill uneven voids in the patient's tissue and fit more tightly.
Without the need for general anesthesia, nor expensive laparoscopic instrumentation, a surgeon, when repairing an inguinal hernia, makes a small incision in the patient, approximately three centimeters long, arranged obliquely, approximately two to three centimeters above the internal ring location of the inguinal hernia. Through this small incision, using the muscle splitting technique, the surgeon performs a dissection deep into the patient's properitoneal space, creating a pocket in this space into which this hernia mesh patch is to be inserted.
Thereafter, the surgeon, using his or her fingers, readily folds and compacts this hernia mesh patch and directs it through the incision and into the patient's properitoneal space, where it unfolds and expands into its planar configuration, creating a trampoline effect. Then the surgeon, using just one of his or her fingers, placed partially through a slit in the top layer of mesh and into the pocket between the top and bottom layers of this hernia mesh patch, conveniently and accurately moves the hernia mesh patch to cover the defect in the patient's thick reinforcing lining of his or her abdominal cavity. Thereafter the surgeon withdraws his or her finger and then secures the incision with stitches.
The patient's body, soon after surgery, reacts to the mesh of the hernia mesh patch, and in a short time, the mesh becomes stuck, thereby keeping the hernia mesh patch in place. Thereafter the patient's scar tissue grows into the mesh over a period of time, between thirty and sixty days, to permanently fix the hernia mesh patch in its intended position over the repaired area, where the hernia was located.
In respective designs of these hernia mesh patches, small holes are cut through both layers of the mesh inside the fiber ring, to increase friction and to minimize the sliding or migration of the hernia mesh patch, after it is positioned. Also in some designs, spaced spikes are attached to the fiber spring, or are integrally formed with the fiber spring to serve as anchors, by entering the patient's tissue. Also in some designs of these hernia mesh patches to be used in a location where the patient's peritoneum has been destroyed, one layer of this patient's hernia patch is made of a material, such as “Gortex” material, which is less prone to adhere to a bowel or other intra-abdominal organ.


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