JP-2026076278-A - Negative pressure dressing material with preferred lateral shrinkage

Abstract

[Problem] To provide a dressing material, system, and method for treating tissue sites affected by decompression. [Solution] Some embodiments of the manifold pad may be configured to distribute reduced pressure to a tissue site and to provide lateral contraction to the tissue site. In some embodiments, the manifold pad may comprise a foam having a cellular structure that forms oval or ellipsoidal pores. In some embodiments, the manifold pad may be configured to preferentially contract radially or laterally when negative pressure is applied. For example, the manifold pad may be configured to be more resistant to compression of the thickness of the manifold pad than to collapsing radially or laterally. Other devices, dressings, systems, and methods are disclosed. [Selection Diagram] Figure 1A

Inventors

• シモンズ，テイラー エイチ．
• ハナー，マリリン
• ゴンザレス，ハヴィエル

Assignees

• ケーシーアイ ライセンシング インコーポレイテッド

Dates

Publication Date

20260511

Application Date

20260130

Priority Date

20200709

Claims (20)

1. A foam manifold pad, The first surface and The second surface and The thickness of the foam extending between the first surface and the second surface is provided, The foam material of the manifold pad has a plurality of egg-shaped holes, The manifold pad is configured to contract in a plane substantially parallel to the first surface when negative pressure is applied. Foam manifold pad.
2. The manifold pad according to claim 1, wherein the oval-shaped pores are configured to contract in a direction substantially parallel to the first surface when negative pressure is applied to the manifold pad.
3. The manifold pad according to claim 1, wherein the manifold pad is configured such that its thickness does not substantially shrink in the direction extending from the first surface to the second surface under negative pressure.
4. The manifold pad according to claim 1, wherein the manifold pad is configured to contract more radially or transversely than in thickness under applied negative pressure.
5. Each of the aforementioned oval-shaped holes is provided with a long axis and a short axis, The aforementioned long axis is oriented substantially perpendicular to the first surface, The short axis is oriented substantially parallel to the first surface, For each oval-shaped pore, the long axis is substantially perpendicular to the short axis. For each oval-shaped pore, the length along the major axis is longer than the length along the minor axis. The manifold pad according to claim 1.
6. The manifold pad according to claim 5, wherein the oval-shaped pores are configured to contract more in the direction of the minor axis than in the direction of the major axis when negative pressure is applied.
7. The manifold pad according to claim 1, wherein the foam includes an open-cell foam.
8. The manifold pad according to claim 5, wherein the foam comprises a felted foam having a compression axis, and the minor axis of the oval-shaped pore is substantially parallel to the compression axis.
9. The manifold pad according to claim 8, wherein the felted foam contains a hardness coefficient of 2 to 7.
10. The manifold pad according to claim 9, wherein the ratio of the contraction of the short axis to the contraction of the long axis of the oval-shaped pore is greater than 1 under the applied negative pressure.
11. A dressing material for treating tissue sites, A therapeutic device having a film layer and configured to allow fluid to flow radially under applied negative pressure, In open-cell foam manifold pads, The first surface and The second surface and The thickness of the open-cell foam extending between the first surface and the second surface, The open-cell foam of the manifold pad has a plurality of egg-shaped holes, The manifold pad is configured to contract in a plane substantially parallel to the first surface when negative pressure is applied. The manifold pad is configured to shrink to a thickness less in the radial or transverse direction under the applied negative pressure. Dressing ingredients.
12. The dressing material according to claim 11, further comprising a sealing member configured to cover the manifold pad and the treatment device and to provide an air pressure seal to the tissue site.
13. Each of the aforementioned oval-shaped holes is provided with a long axis and a short axis, The aforementioned long axis is oriented substantially perpendicular to the first surface, The short axis is oriented substantially parallel to the first surface, For each oval-shaped pore, the long axis is substantially perpendicular to the short axis. For each oval-shaped pore, the length along the major axis is longer than the length along the minor axis. The egg-shaped pore is configured such that, when negative pressure is applied, the egg-shaped pore contracts more in the direction of the minor axis than in the direction of the major axis. The dressing material according to claim 11.
14. The foam comprises a felted foam having a compression shaft, The minor axis of the oval-shaped hole is substantially parallel to the compression axis, The felted foam has a hardness coefficient of 2 to 7. The dressing material according to claim 13.
15. A method for forming a dressing material, The steps include providing a foam blank having multiple pores, In the step of forming a foam by changing the foam blank, Each of the altered pores in the foam is oval-shaped, having a long axis and a short axis. In the step of forming the foam to create a manifold pad having a first surface, a second surface, and a thickness of foam extending between the first surface and the second surface, the short axis is substantially parallel to the first surface, method.
16. The method according to claim 15, wherein the step of altering the foam blank includes compressing the foam blank along the compression axis to permanently deform the plurality of holes and form a foam having oval-shaped holes having a major axis substantially perpendicular to the compression axis and a minor axis substantially parallel to the compression axis.
17. The method according to claim 16, wherein the step of molding the foam includes the step of cutting the foam perpendicular to the compression axis.
18. The method according to claim 15, wherein the step of molding the foam includes cutting the foam to form a first surface substantially parallel to the short axis and a long axis substantially perpendicular to the first surface.
19. The method according to claim 16, wherein the step of molding the foam includes the step of rotating the foam by 90 degrees after compression, and then cutting the foam in the thickness direction.
20. The method according to claim 15, wherein the step of altering the foam blank includes felting the foam blank along the compression axis to a hardness coefficient of 2 to 7 such that the foam is formed with oval holes having a long axis substantially perpendicular to the compression axis and a short axis substantially parallel to the compression axis.

Description

Cross-reference of related applications This application claims priority to U.S. Provisional Patent Application No. 63/049,866, filed on 9 July 2020, the entirety of which is incorporated herein by reference. This disclosure relates, in general, to medical treatment systems, and more specifically, to dressings, systems, and methods for treating tissue sites under decompression. Clinical research and practice have shown that reducing pressure near a tissue site can enhance and accelerate the growth of new tissue in that site. While this phenomenon has numerous applications, it has proven particularly advantageous for wound treatment. Regardless of the etiology of the wound—whether trauma, surgery, or another cause—proper wound care is crucial to the outcome. Treatment of wounds or other tissues by decompression can be commonly referred to as "negative pressure therapy," but is also known by other names, including, for example, "negative pressure wound therapy," "decompression therapy," "vacuum therapy," and "vacuum-assisted closure." Negative pressure therapy can offer many benefits, including the transition of epithelial and subcutaneous tissue, improved blood flow, and micro-deformation of tissue at the wound site. These benefits, collectively, can increase granulation tissue development and reduce healing time. While the clinical benefits of negative pressure therapy are widely recognized, its cost and complexity can be limiting factors in its application. The development and operation of negative pressure systems, components, and processes continue to present significant challenges for manufacturers, healthcare providers, and patients. Disadvantages of certain embodiments of tissue treatment dressings, tissue treatment systems, and tissue treatment methods are addressed as illustrated and described in various exemplary and non-limiting embodiments herein. For example, in some embodiments, the dressing material may include a manifold pad that can be configured to contract laterally under applied negative pressure, thereby providing a lateral contractile force to the tissue site. For instance, the manifold pad may include a felted foam that generates oval-shaped (e.g., with the long axis longer than the short axis) holes or bubbles. In some embodiments, the oval holes may be oriented such that the short axis of the oval hole is oriented parallel to the surface of the manifold pad (e.g., perpendicular to the thickness of the manifold pad) and the long axis of the oval hole is oriented parallel to the thickness (e.g., perpendicular to the surface of the manifold pad). This oval hole configuration may result in a manifold pad that contracts more radially or laterally than in thickness when negative pressure is applied, which may assist in guiding the closure of the incision margin. More generally, some embodiments may relate to a foam manifold pad for providing negative pressure therapy to a tissue site, and the manifold pad foam may comprise a first surface, a second surface, and a foam thickness extending between the first and second surfaces, wherein the manifold pad foam may comprise a plurality of oval pores, and the manifold pad and/or oval pores may be configured to contract in a plane substantially or substantially parallel to the first surface and/or substantially perpendicular to the thickness when negative pressure is applied. In some embodiments, the manifold pad and/or oval pores may be configured to contract preferentially in a plane substantially parallel to the first surface. In some embodiments, the manifold pad may be configured to resist shrinkage in thickness, for example, shrinking in thickness less in the lateral or radial directions under negative pressure. In some embodiments, the manifold pad may be configured to contract more in a plane substantially perpendicular to the thickness than in thickness when negative pressure is applied. In some embodiments, the manifold pad may be configured to exhibit substantially no thickness shrinkage in the direction extending from the first surface to the second surface under negative pressure. In some embodiments, the manifold pad may be configured to exhibit no significant thickness shrinkage under the applied negative pressure. In some embodiments, the foam may include open-cell foam. For example, the open-cell foam of the manifold pad may have an open-cell or perforated cellular structure, and oval pores (e.g., open cells) may be formed by the cellular structure. In some embodiments, each oval pore may include a major axis and a minor axis, the major axis may be oriented substantially perpendicular to the first surface, and the minor axis may be oriented substantially parallel to the first surface. For each oval pore, the major axis may be substantially perpendicular to the minor axis, and for each oval pore, the length along the major axis may be longer than the length along the minor axis. In some embodiments, the oval pores may be configured