US-12622814-B2 - Leak-resistant bandage systems and methods with hydrophilic foam wound insert for fluid-instillation and/or negative-pressure wound therapies

Abstract

Wound treatment systems and methods (e.g., having hydrophilic wound inserts), such as for negative-pressure and/or fluid-installation wound therapies. Some embodiments include a check-valve assembly between a wound dressing and a vacuum source.

Inventors

• Joanna Payne Perkins
• Paul S. SLACK
• Kevin Higley
• Kenneth Mitchel Knowles
• Aidan Marcus Tout

Assignees

• SOLVENTUM INTELLECTUAL PROPERTIES COMPANY

Dates

Publication Date

20260512

Application Date

20210111

Claims (19)

1. 1 . A check-valve assembly comprising: a housing having a first connection and a second connection; a first flow path extending from the first connection to the second connection in the housing and configured to be fluidly coupled to a source of negative pressure; a second flow path distinct from the first flow path, the second flow path extending from the first connection to the second connection in the housing and configured to fluidly couple a pressure sensor and a dressing; and a check valve disposed in the first flow path in the housing, the check valve configured to permit fluid to pass through the first flow path in a first direction, prevent backflow of fluids in a second direction, and prevent pressure in the first direction from exceeding atmospheric pressure.
2. 2 . The check valve assembly of claim 1 , wherein the check valve comprises a duckbill valve.
3. 3 . The check valve assembly of claim 1 , wherein the check valve comprises a ball valve.
4. 4 . The check valve assembly of claim 1 , wherein the second flow path is concentric with the first flow path.
5. 5 . The check valve assembly of claim 1 , wherein the first connection comprises a multi-lumen connection and the second connection comprises a multi-lumen connection, each multi-lumen connection configured to couple at least one lumen of a multi-lumen conduit to the first flow path and at least one lumen of a multi-lumen conduit to the second flow path.
6. 6 . The check valve assembly of claim 1 , wherein the housing comprises a first member having the first connection and a second member having the second connection, the first member coupled to the second member.
7. 7 . The check valve assembly of claim 6 , wherein the check valve is disposed between the first member and the second member.
8. 8 . The check valve assembly of claim 7 , wherein the first member and the second member seal around the check valve when the first member is coupled to the second member.
9. 9 . A system for treating a tissue site comprising: a dressing configured to be disposed over the tissue site; a vacuum source configured to be fluidly coupled to the dressing; a canister fluidly configured to be fluidly coupled between the dressing and the vacuum source; a fluid source configured to be fluidly coupled to the dressing; and a check valve assembly having: a housing having a first connection and a second connection; a first flow path and a second flow path extending from the first connection to the second connection in the housing, the second flow path being distinct from the first flow path;, the check valve assembly having a check valve disposed in the first flow path in the housing, the check valve configured to permit fluid to pass through the first flow path in a first direction, prevent backflow of fluids in a second direction, and prevent pressure in the first direction from exceeding atmospheric pressure.
10. 10 . The system of claim 9 , wherein the check valve comprises a duckbill valve.
11. 11 . The system of claim 9 , wherein the check valve comprises a ball valve.
12. 12 . The system of claim 9 , wherein the second flow path is concentric with the first flow path.
13. 13 . The system of claim 9 , wherein the first connection comprises a multi-lumen connection and the second connection comprises a multi-lumen connection, each multi- lumen connection configured to couple at least one lumen of a multi-lumen conduit to the first flow path and at least one lumen of a multi-lumen conduit to the second flow path.
14. 14 . The system of claim 9 , wherein the housing comprises a first member having the first connection and a second member having the second connection, the first member coupled to the second member.
15. 15 . The system of claim 14 , wherein the check valve is disposed between the first member and the second member.
16. 16 . The system of claim 15 , wherein the first member and the second member seal around the check valve when the first member is coupled to the second member.
17. 17 . A check-valve assembly having a housing, the check valve assembly comprising: a first flow path disposed in the housing and configured to be fluidly coupled to a source of negative pressure; a second flow path distinct from and concentric with the first flow path, the second flow path disposed in the housing and configured to fluidly couple a pressure sensor and a dressing; and a check valve disposed in the first flow path in the housing, the check valve configured to permit fluid to pass through the first flow path in a first direction, prevent backflow of fluids in a second direction, and prevent pressure in the first direction from exceeding atmospheric pressure.
18. 18 . The check valve assembly of claim 17 , wherein the check valve comprises a duckbill valve.
19. 19 . The check valve assembly of claim 17 , wherein the check valve comprises a ball valve.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 16/002,155, filed Jun. 7, 2018, which is a divisional of U.S. patent application Ser. No. 14/572,158, filed Dec. 16, 2014, now U.S. Pat. No. 10,016,541, which is a continuation of U.S. patent application Ser. No. 13/009,116, filed Jan. 19, 2011, now U.S. Pat. No. 9,089,630, which claims priority to U.S. Provisional Patent Application No. 61/296,822, filed Jan. 20, 2010, the contents of each of which are incorporated herein in their entirety. BACKGROUND 1. Field of the Invention The present invention relates generally to healing of wounds and wound-treatment therapies. More particularly, but not by way of limitation, the present invention relates to fluid-instillation and negative-pressure wound therapies. 2. Background Information Clinical studies and practice have shown that providing a reduced pressure in proximity to a tissue site augments and accelerates the growth of new tissue at the tissue site. The applications of this phenomenon are numerous, but application of reduced pressure has been particularly successful in treating wounds. This treatment (frequently referred to in the medical community as “negative pressure wound therapy,” “reduced pressure therapy,” or “vacuum therapy”) provides a number of benefits, including faster healing and increased formulation of granulation tissue. Typically, reduced pressure is applied to tissue through a wound insert (e.g., a porous pad or other manifold device). The wound insert typically contains cells or pores that are capable of distributing reduced pressure to the tissue and channeling fluids that are drawn from the tissue. The wound insert can be incorporated into a wound dressing having other components that facilitate treatment, such as, for example, a drape (e.g., adhesive surgical drape). Instillation of fluids (e.g., irrigation fluids and/or medicaments) may be used in conjunction with negative pressure wound therapy to promote healing and/or improve efficacy. While NPWT has been highly successful in the promotion of wound closure, healing many wounds previously thought largely untreatable, some difficulty remains. With current negative-pressure and/or fluid-instillation systems, leaks may occur at the dressing site due to the presence of fluid (e.g., instillation fluids, body fluids, etc.) and/or due to such fluids being forced to the perimeter of a wound insert (e.g., a foam wound insert). Such fluids may interact with the adhesive between the drape and adjacent healthy skin, and can lead to failure and leakage, thus requiring removal of a wound dressing and application of a new dressing. Such removal and re-application can be detrimental to a patient as the wound is exposed to external atmosphere (e.g., bacteria, contaminants, and the like). Further, fluid forced to the edges of wound can pool and/or macerate/damage the periwound skin and/or intact skin. SUMMARY The present disclosure includes embodiments of methods of forming a wound insert, wound-treatment methods, wound dressings, and wound-treatment systems. Some embodiments of the present check-valve assemblies comprise: a housing defining a first connection, a second connection, a first passageway between the first and second connections, and a second passageway between the first and second connections that is distinct from the first passageway; a check valve disposed in the first passageway and configured to: permit fluid to pass through the check valve assembly from the first connection to the second connection if the pressure at the second connection is less than the pressure at the first connection; and substantially prevent fluid from passing through the check valve from the second connection to the first connection if the pressure at the second connection is greater than the pressure at the first connection. In some embodiments, the check valve comprises a duckbill valve. In some embodiments, the check valve comprises a ball valve. In some embodiments, the first connection comprises a multi-lumen connection having a first lumen in communication with the first passageway, and a second lumen in communication with the second passageway, and where the second connection comprises a multi-lumen connection having a first lumen in communication with the first passageway, and a second lumen in communication with the second passageway. In some embodiments, the second lumen of the first connection is an annular lumen disposed around the first lumen of the first connection, and where the second lumen of the second connection is an annular lumen disposed around the first lumen of the second connection. Some embodiments of the present wound-treatment systems comprise: a fluid source configured to be coupled to a wound dressing such that the fluid source is actuatable to deliver a fluid to the wound dressing; a check-valve assembly configured to be coupled to a wound dressing; a vacuum source c