Systems and methods for tissue removal

Patent metadata

Field	Value
Publication number	US-10568659-B2
Application number	US-201615348089-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Apr 23, 2015
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A guard for providing a cut-resistant pathway through a body orifice or incision to circumferentially protect tissue at the margin is provided. The guard is made of flexible, cut-resistant mesh material having a plurality of interwoven thermosetting filaments. The guard has a central lumen and at least one flared end. The flared end, which serves to anchor the guard in the body opening, is deformable into a reduced configuration to facilitate its insertion and removal. The layer of mesh stretches laterally to increase the diameter of the central lumen. The flexibility and expandability of the guard allows the guard to conform to body openings of different sizes. The guard may include a drawstring to cinch the flared distal end from the proximal end. The guard is thermoset with the flared distal end that is biased to spring back to its normal, undeformed configuration when released from a deformed configuration.

First claim

We claim:

1. A guard for providing a cut-resistant pathway through a body opening to protect a tissue margin, the guard comprising:
a sidewall having a tubular shape defining a central lumen; the central lumen extending along a longitudinal axis between a proximal opening at a proximal end and a distal opening at a distal end; the sidewall being made of at least one layer of flexible, cut-resistant mesh material having a plurality of interwoven filaments defining interstices; the sidewall having a generally hourglass shape when in a normal, undeformed configuration with a progressively increasing central lumen toward the proximal end defining a proximal flange in the sidewall and a progressively increasing central lumen toward the distal end defining a distal flange in the sidewall; the proximal flange being configured to anchor the guard with respect to a proximal end of the tissue margin and the distal flange being configured to anchor the guard with respect to a distal end of the tissue margin and the sidewall circumferentially protecting the tissue margin along the body opening; the sidewall having a neck portion located between the proximal flange and the distal flange; the sidewall being made of thermosetting polymer filaments; the sidewall being deformable from the normal, undeformed configuration and biased to return to the normal, undeformed configuration when released,
wherein the sidewall further including a fold at the distal end such that the sidewall overlaps itself to form two coaxial layers of mesh material circumferentially enclosing the central lumen.

2. The guard of claim 1 wherein the mesh material is configured to stretch laterally relative to the longitudinal axis such that the sidewall is expandable to enlarge the lateral dimension of the central lumen at the neck portion relative to the lateral dimension of the central lumen at the neck portion when in the normal, undeformed configuration.

3. The guard of claim 1 wherein the mesh material is configured such that the neck portion is adapted to be laterally expandable to lengthen a lateral dimension of the guard while reducing the axial dimension of the guard along the longitudinal axis.

4. The guard of claim 1 wherein the mesh material is configured to stretch laterally relative to the longitudinal axis such that the sidewall is expandable to enlarge the interstices of the central lumen at the neck portion relative to the interstices of the central lumen at the neck portion when in the normal, undeformed configuration.

5. The guard of claim 1 wherein the distal flange is configured to fold distally to a reduced configuration in which the distal flange has smaller lateral dimension relative to the normal, undeformed shape.

6. A guard for providing a cut-resistant pathway through a body opening defining a tissue margin, the guard comprising:
a sidewall having a tubular shape defining a central lumen extending along a longitudinal axis between a first end and a second end; the sidewall being made of cut-resistant mesh material having a plurality of interwoven filaments defining interstices in a tubular first layer of mesh material; the plurality of interwoven filaments being formed of a plastically deformable heat setting material with the cut-resistant mesh material comprising the interwoven filaments molded and heat set to shape the cut-resistant mesh material of the sidewall; the sidewall being folded to create a fold at a distal end of the guard with the first end and the second end of the sidewall being adjacent to each other at a proximal end of the guard; the folded sidewall forming a tubular second layer of mesh material substantially coaxial with the tubular first layer of mesh material.

7. The guard of claim 6 wherein the guard has a deformed configuration in which the lateral dimension at the distal end is reduced relative to the lateral dimension of the distal end in a normal, undeformed configuration.

8. The guard of claim 6 further including a circumferential ring or bead; wherein both the first end and second end of the sidewall being located inside the ring or bead.

9. The guard of claim 6 further including a proximal flange formed at the proximal end of the guard and a distal flange formed at the distal end of the guard; the proximal flange defined by a progressively increasing central lumen toward the proximal end; the distal flange defined by a progressively increasing central lumen toward the distal end.

10. The guard of claim 6 wherein the guard has an hourglass shape.

11. The guard of claim 6 wherein the guard has at least a distal portion that is adapted for lateral reduction.

12. The guard of claim 6 wherein the guard has at least a central neck portion that is laterally expandable by stretching the mesh material in a lateral direction to move the filaments relative to each other and expand the interstices while diminishing the longitudinal dimension of the guard.

13. The guard of claim 6 further including an outwardly extending distal flange that is adapted to be folded down in a distal direction to reduce the lateral dimension of the distal end of the guard to facilitate insertion and removal of the guard from the body opening.

14. The guard of claim 6 wherein the guard has a deformed configuration in which the distal flange is flexed distally, lengthening the axial dimension of the guard such that the lateral dimension of the distal end and flange is reduced relative to the normal, undeformed configuration.

15. The guard of claim 6 wherein the heat setting material of the interwoven filaments provides the cut-resistant mesh material of the sidewall with memory retention such that when the sidewall is deformed and subsequently released it springs back to its original, undeformed shape.

16. A guard for providing a cut-resistant pathway through a body opening to protect a tissue margin, the guard comprising:
a sidewall having a tubular shape defining a central lumen; the central lumen extending along a longitudinal axis between a proximal opening at a proximal end and a distal opening at a distal end; the sidewall being made of at least one layer of flexible, cut-resistant mesh material having a plurality of interwoven filaments defining interstices; the sidewall having a generally hourglass shape when in a normal, undeformed configuration with a progressively increasing central lumen toward the proximal end defining a proximal flange in the sidewall and a progressively increasing central lumen toward the distal end defining a distal flange in the sidewall; the proximal flange being configured to anchor the guard with respect to a proximal end of the tissue margin and the distal flange being configured to anchor the guard with respect to a distal end of the tissue margin and the sidewall circumferentially protecting the tissue margin along the body opening; the sidewall having a neck portion located between the proximal flange and the distal flange; the sidewall being deformable from the normal, undeformed configuration and biased to return to the normal, undeformed configuration when released,
wherein the interwoven filaments being formed of a plastically deformable heat setting material; the cut-resistant mesh material comprising the interwoven filaments being molded and heat set to give the cut-resistant mesh material of the side wall the generally hourglass shape.

17. The guard of claim 16 wherein the heat setting material of the interwoven filaments provides the cut-resistant mesh material of the sidewall with memory retention such that when the sidewall is deformed and subsequently

Assignees

• Applied Med Resources

Inventors

• Do Alexandra
• Pravong Boun
• Wachli Serene

Classifications

• A61B17/3211

  Surgical scalpels, knives; Accessories therefor · CPC title

• A61B2017/00287

  Bags for minimally invasive surgery · CPC title

• A61B2090/08021

  of the patient or his organs · CPC title

• A61B2017/0225

  flexible, e.g. fabrics, meshes, or membranes · CPC title

• A61B90/40

  Apparatus fixed or close to patients specially adapted for providing an aseptic surgical environment · CPC title