CN-122028948-A - Canister connection system for disposable negative pressure wound therapy system

Abstract

A disposable NPWT tank connection system having a tank and a tank adapter. The tank includes a pump connection surface having a tank outlet. The canister adapter is operable to fluidly connect the canister to a canister connection surface of a pump unit. The tank adapter includes a first pump engagement mechanism positioned and configured to removably engage a first tank engagement mechanism of the tank connecting surface, a second pump engagement mechanism positioned and configured to removably engage a second tank engagement mechanism of the tank connecting surface, and an opening disposed between the first pump engagement mechanism and the second pump engagement mechanism. The canister is fluidly connected to the pump unit when the first and second pump engagement mechanisms of the canister engage the corresponding first and second canister engagement mechanisms.

Inventors

• N. J. Polk
• E. VALENTINE
• D.S. Desai
• S. D. Barnes

Assignees

• 帝皇工业有限公司

Dates

Publication Date

20260512

Application Date

20240910

Priority Date

20230914

Claims (20)

1. 1. A disposable NPWT system for providing reduced pressure to a wound site along a fluid flow path, the disposable NPWT system comprising: A pump unit having a tank connection surface, the tank connection surface comprising: A first canister engagement mechanism is provided for engagement with the first canister, A second can engagement mechanism, and A pump inlet disposed between the first tank engagement mechanism and the second tank engagement mechanism, A canister having a pump connection surface, the canister configured to be fluidly connected with the pump unit such that the pump connection surface of the canister is positioned against the canister connection surface of the pump unit, the canister comprising: a first pump engagement mechanism positioned and configured to removably engage the first canister engagement mechanism; a second pump engagement mechanism positioned and configured to removably engage the second canister engagement mechanism, and A tank outlet disposed between the first pump engagement mechanism and the second pump engagement mechanism; Wherein when the first and second pump engagement mechanisms of the canister engage the corresponding first and second canister engagement mechanisms, the canister outlet is fluidly sealed from the pump inlet such that the canister is fluidly connected to the pump unit.
2. 2. The disposable NPWT system of claim 1, wherein the canister comprises a canister adapter having the first pump engagement mechanism, the second pump engagement mechanism, and an opening disposed between the first pump engagement mechanism and the second pump engagement mechanism, the opening positioned and configured to be disposed between the pump inlet and the canister outlet when the canister is fluidly connected to the pump unit.
3. 3. The disposable NPWT system of claim 1, wherein: the first pump engagement mechanism includes a deflectable catch; The first can engagement mechanism includes a first snap receiver and a locking surface disposed adjacent the first snap receiver, and The deflectable catch of the first pump engagement mechanism is configured to deflect inwardly as it moves over the locking surface of the first canister engagement mechanism and deflect outwardly after the deflectable catch passes over the locking surface to fluidly connect the canister with the pump unit.
4. 4. The disposable NPWT system of claim 3, wherein the second pump engagement mechanism comprises an alignment catch, and the second canister engagement mechanism comprises a second catch receiver sized and configured to receive the alignment catch when the second pump engagement mechanism engages the second canister engagement mechanism.
5. 5. The disposable NPWT system of claim 1, wherein: The tank connecting surface includes a protrusion disposed around the pump inlet and a groove formed in the tank connecting surface around a base of the protrusion, and The canister includes a sealing member configured to be disposed about the canister outlet, the sealing member being sized and configured to fit within the recess of the canister connection surface to form a sealed connection between the pump inlet and the canister outlet when the canister is fluidly connected with the pump unit.
6. 6. The disposable NPWT system of claim 1, wherein the canister further comprises a tube adapter for fluidly connecting to a proximal end of a pressure relief line.
7. 7. The disposable NPWT system of claim 6, wherein the canister attachment surface comprises: A first recess including the pump inlet, the first tank engagement mechanism, and the second tank engagement mechanism, the first recess sized and configured to receive the first pump engagement mechanism and the second pump engagement mechanism of the tank, and A second recess sized and configured to receive the tube adapter.
8. 8. The disposable NPWT system of claim 1, further comprising a door operably connected to the pump unit, the door to permit removable engagement of the first and second pump engagement mechanisms with the corresponding first and second tank engagement mechanisms when the door is in an open position, and to prevent disengagement of the first and second pump connection engagement mechanisms with the corresponding first and second tank connection engagement mechanisms when the door is in a closed position and the tank is fluidly connected to the pump unit.
9. 9. The disposable NPWT system of claim 8, wherein the door comprises one or more windows for viewing the canister's exudate level when the door is in a closed position and the canister is in fluid connection with the pump unit.
10. 10. The disposable NPWT system of claim 1, further comprising a wound dressing assembly and a reduced pressure line configured to fluidly connect with the canister at a proximal end thereof and to fluidly connect with the wound dressing assembly at a distal end thereof to fluidly connect the wound dressing assembly with the canister.
11. 11. The disposable NPWT system of claim 10, wherein the wound dressing assembly comprises a filtered ventilation port for introducing filtered atmospheric air into the reduced pressure line to facilitate flow of exudates from the wound site to the canister through the reduced pressure line.
12. 12. The disposable NPWT system of claim 10, wherein the proximal end of the pressure relief line is permanently connected in fluid connection with an inlet port of the canister, and the distal end of the pressure relief line is configured to be removably connected in fluid connection with the wound dressing assembly.
13. 13. A disposable NPWT tank connection system, the tank connection system comprising: A tank having a pump connection surface including a tank outlet, and A canister adapter for fluidly connecting the canister to a canister connection surface of a pump unit, the canister connection surface having a first canister engagement mechanism, a second canister engagement mechanism, and a pump inlet disposed between the first canister engagement mechanism and the second canister engagement mechanism, the canister adapter comprising: A first pump engagement mechanism positioned and configured to removably engage the first canister engagement mechanism of the canister connection surface; a second pump engagement mechanism positioned and configured to removably engage the second canister engagement mechanism of the canister connecting surface, and An opening disposed between the first pump engagement mechanism and the second pump engagement mechanism; Wherein the tank outlet is fluidly sealed from the pump inlet by the opening of the tank adapter, the opening being located between the pump inlet and the tank outlet, when the first and second pump engagement mechanisms of the tank engage the respective first and second tank engagement mechanisms to fluidly connect the tank with the pump unit.
14. 14. The disposable NPWT tank connection system of claim 13, wherein the tank adapter is formed of a hard plastic and the tank is formed of a soft plastic.
15. 15. The disposable NPWT tank connection system of claim 14, wherein the first pump engagement mechanism comprises a deflectable catch configured to deflect inwardly as it moves over a locking surface of the first tank engagement mechanism and deflect outwardly after the deflectable catch passes over the locking surface to fluidly connect the tank with the pump unit.
16. 16. The disposable NPWT tank connection system of claim 15, wherein the second pump engagement mechanism comprises an alignment clasp sized and configured to be positioned in a clasp receiver of the second tank engagement mechanism to align the tank adapter with the tank connection surface when the second pump engagement mechanism engages the second tank engagement mechanism.
17. 17. The disposable NPWT canister connection system of claim 13, wherein the canister further comprises a canister inlet, the connection system further comprising a wound dressing assembly and a reduced pressure line configured to fluidly connect with the canister inlet at a proximal end thereof and the wound dressing assembly at a distal end thereof to fluidly connect the wound dressing assembly with the canister.
18. 18. The disposable NPWT canister connection system of claim 17, wherein the wound dressing assembly includes a filtered ventilation port for introducing filtered atmospheric air into the reduced pressure line to facilitate flow of exudates from the wound site to the canister through the reduced pressure line.
19. 19. The disposable NPWT canister connection system of claim 17, wherein the proximal end of the pressure relief line is permanently connected in fluid connection with the canister inlet and the distal end of the pressure relief line is configured to be removably connected in fluid connection with the wound dressing assembly.
20. 20. The disposable NPWT tank connection system of claim 19, further comprising a tube adapter comprising a bottom surface sealed around the tank inlet and comprising an inlet port for providing a permanent connection with the proximal end of the pressure relief line.

Description

Canister connection system for disposable negative pressure wound therapy system Technical Field The present disclosure relates to the field of negative pressure wound therapy. More particularly, the present disclosure relates to a canister connection system particularly suited for use in a disposable negative pressure wound therapy system. Background The primary purpose of negative pressure wound therapy (also known in the medical community as "reduced pressure therapy" or "vacuum therapy") is to apply reduced pressure (also known as "negative pressure" or "vacuum pressure", referred to herein as "reduced pressure") to a wound site to stimulate healing and remove excess exudates from the wound site. The primary components of a negative pressure wound therapy system (hereinafter "NPWT system") include a reduced pressure source (e.g., a vacuum pump), a waste fluid tank for collecting exudates drawn from the wound site, a wound dressing assembly for covering the wound site (e.g., an assembly for directing the flow of a wound site and encasing layers known in the art such as films, dressing foam, etc.), and one or more lumens (e.g., tubing) fluidly connecting the wound dressing assembly to the reduced pressure source and tank. Heretofore, NPWT systems have been used primarily in hospital environments. This results in prolonged patient hospitalization and increased costs. However, single patient disposable NPWT systems are becoming increasingly popular. Disposable systems are typically portable, mobile-type units that can be worn by a patient during an outpatient procedure. Disposable NPWT systems are typically packaged as kits. The kit includes a pump unit (possibly reusable), one or more canisters for connection to the pump unit, a dressing that can be preassembled and placed over the wound site, and tubing for fluidly connecting the dressing to the canisters. Problems with current disposable systems include providing a removable fluid-tight connection between the pump unit and the canister in a user-friendly and ergonomic manner. In addition, many disposable NPWT systems are bulky or otherwise integrate tanks and associated tank connection systems that require a large footprint. Another design consideration is that the connection system should provide the ability to easily monitor the tank fill status during use. Accordingly, there is a need for an improved canister and related canister connection system for a disposable NPWT system that addresses the above-described problems. Disclosure of Invention The above and other needs are met by a disposable NPWT system for providing reduced pressure to a wound site along a fluid flow path. The disposable NPWT system includes a pump unit having a tank connection surface and a tank having a pump connection surface. The canister connection surface includes a first canister engagement mechanism, a second canister engagement mechanism, and a pump inlet disposed between the first canister engagement mechanism and the second canister engagement mechanism. The canister is configured to be fluidly connected with the pump unit such that a pump connection surface of the canister is positioned against a canister connection surface of the pump unit. The canister includes a first pump engagement mechanism positioned and configured to removably engage the first canister engagement mechanism, a second pump engagement mechanism positioned and configured to removably engage the second canister engagement mechanism, and a canister outlet disposed between the first pump engagement mechanism and the second pump engagement mechanism. When the first and second pump engagement mechanisms of the canister engage the corresponding first and second canister engagement mechanisms, the canister outlet is fluidly sealed from the pump inlet such that the canister is fluidly connected to the pump unit. According to some embodiments, the canister includes a canister adapter having a first pump engagement mechanism, a second pump engagement mechanism, and an opening disposed between the first pump engagement mechanism and the second pump engagement mechanism. The opening is positioned and configured to be disposed between the pump inlet and the tank outlet when the tank is fluidly connected with the pump unit. According to some embodiments, the first pump engagement mechanism comprises a deflectable catch, the first tank engagement mechanism comprises a first catch receiver and a locking surface disposed adjacent the first catch receiver, and the deflectable catch of the first pump engagement mechanism is configured to deflect inwardly as it moves over the locking surface of the first tank engagement mechanism and outwardly after the deflectable catch passes over the locking surface to fluidly connect the tank with the pump unit. According to some embodiments, the second pump engagement mechanism includes an alignment catch, and the second tank engagement mechanism includes a second catch receiver si