Disclosed herein is a device which is intended to deliver and maintain reduced pressure to body surfaces for application of reduced pressure wound therapy (RPWT) also known as negative pressure wound therapy (NPWT). During application of this type of therapy, a substantially airtight seal is formed
Disclosed herein is a device which is intended to deliver and maintain reduced pressure to body surfaces for application of reduced pressure wound therapy (RPWT) also known as negative pressure wound therapy (NPWT). During application of this type of therapy, a substantially airtight seal is formed around a section of tissue to be treated. This seal is formed by a dressing which provides fluid communication from a section of tissue to a reduced pressure source. Disclosed herein is a dressing system which is configured to enhance usability and functionality of this dressing. First, the system may be configured to allow full rotation of the fluid communication conduit to the reduced pressure source along the axis substantially normal to the dressing. Second, the system may be configured to include a one-way valve to prevent backflow of any drainage fluids. Third, the system may be configured with transparent windows covered by opaque flaps to allow inspection through the dressing. Fourth, the system may be configured to include an indicator which visually makes clear whether reduced pressure is being applied or not. Fifth, the system is configured to minimize the profile of the dressing system.
대표청구항▼
1. A device for providing reduced pressure treatment of a location on a patient, the device comprising: a cover structure comprising an upper surface, a lower surface and a first opening extending through the cover structure from the upper surface to the lower surface, wherein the first opening is c
1. A device for providing reduced pressure treatment of a location on a patient, the device comprising: a cover structure comprising an upper surface, a lower surface and a first opening extending through the cover structure from the upper surface to the lower surface, wherein the first opening is capable of communicating with the location when the device engages with the patient; anda port assembly configured to fluidly couple to a negative pressure source, wherein the port assembly comprises:a first wall coupled to the upper surface of the cover structure and having a second opening in fluid communication with the first opening,a compliant second wall, anda volume formed between the first wall and the compliant second wall and in fluid communication with the negative pressure source, the volume capable of being in fluid communication with the location when the device engages with the patient,wherein the compliant second wall is biased to an expanded state upon exposure of the volume to atmospheric pressure and adapted to deform to a collapsed state if the volume is exposed to a negative pressure from the negative pressure source,wherein the first wall is configured not to collapse if the volume is exposed to the negative pressure, andwherein an upper surface of the first wall comprises a visually distinctive region, wherein the visually distinctive region transitions from a hidden state to a visible state and becomes visible through the compliant second wall when the compliant second wall transitions from the expanded state to the collapsed state, wherein when the visually distinctive region is in the hidden state, the compliant second wall obstructs a view of the visually distinctive region. 2. The device of claim 1, wherein the compliant second wall provides an indication of the negative pressure under the cover structure at the location. 3. The device of claim 2, wherein the compliant second wall provides an indication that the negative pressure under the cover structure at the location is lost. 4. The device of claim 1, wherein the exposure of the volume to negative pressure reduces the volume and deforms the compliant second wall to approach the first wall. 5. The device of claim 1, wherein the compliant second wall is translucent and the visually distinctive region is obscured by the compliant second wall in the expanded state. 6. The device of claim 1, wherein the visually distinctive region comprises at least one of a color, a pigment, a symbol, a pattern, or a text. 7. The device of claim 2, wherein the compliant second wall is a first color and the first wall is a second color such that contact between the compliant second wall and the first wall provides a visible indication of a presence of the negative pressure under the cover structure at the location. 8. The device of claim 1, wherein the location on the patient is at least in part external to a skin region of the patient. 9. The device of claim 1, wherein the location on the patient is at least in part internal to a skin region of the patient. 10. The device of claim 1, wherein the compliant second wall deforms from the expanded state to the collapsed state upon exposure of the volume to the negative pressure. 11. The device of claim 10, wherein a relative position of the compliant second wall between the expanded state and the collapsed state indicates an amount of negative pressure delivered to the location. 12. The device of claim 1, wherein the first wall is an interior wall and the compliant second wall is an exterior wall. 13. A device for providing reduced pressure treatment of a location on a patient, comprising: a cover structure comprising an upper surface, a lower surface, and an opening extending through the cover structure from the upper surface to the lower surface, wherein the opening is capable of communicating with the location when the device engages with the patient; anda pressure indicator fluidly coupled to the opening in the cover structure and comprising a visually distinctive region,wherein the pressure indicator is configured to fluidly communicate with a source of negative pressure and comprises, during use, at least a first expanded profile prior to exposure of the location to a negative pressure from the negative pressure source and at least a second persistent collapsed profile upon exposure of the location to the negative pressure,wherein the pressure indicator comprises a first wall configured not to collapse upon exposure of the location to the negative pressure, andwherein when the pressure indicator transitions from the first expanded profile to the second persistent collapsed profile, the visually distinct region transitions from a hidden state to a visible state and becomes visible through a compliant second wall of the pressure indicator, wherein when the visually distinctive region is in the hidden state, the compliant second wall obstructs a view of the visually distinctive region, and wherein when the pressure indicator transitions from the second persistent collapsed profile to the first expanded profile, the visually distinctive region transitions from the visible state to the hidden state. 14. The device of claim 13, wherein a volume of an interior space of the pressure indicator is greater when the pressure indicator is in the first expanded profile than the volume of the interior space when the pressure indicator is in the second persistent collapsed profile. 15. The device of claim 13, wherein the first expanded profile of the pressure indicator is convex and the second persistent collapsed profile of the pressure indicator is concave. 16. The device of claim 13, wherein the pressure indicator comprises an elastomeric membrane coupled to at least a portion of the cover structure. 17. The device of claim 13, further comprising a port assembly fluidly coupled to the cover structure and the pressure indicator, wherein the port assembly is configured to deliver negative pressure from the negative pressure source to the location. 18. The device of claim 17, wherein the pressure indicator comprises an elastomeric membrane surrounding at least a portion of the port assembly. 19. The device of claim 17, further comprising tubing coupled to the port assembly at a first end and coupled to the negative pressure source at an opposite end, wherein the tubing comprises a sidewall having at least one sidewall opening. 20. The device of claim 19, wherein the pressure indicator comprises an elastomeric membrane surrounding the at least one sidewall opening of the tubing. 21. The device of claim 13, wherein the pressure indicator comprises an internal space configured to be reduced upon exposure of the location to the negative pressure and to move the pressure indicator from the first expanded profile to the second persistent collapsed profile. 22. The device of claim 13, wherein a relative position of the pressure indicator between the first expanded profile and the second persistent collapsed profile is indicative of an amount of negative pressure delivered to the location. 23. The device of claim 13, wherein the location on the patient is at least in part external to a skin region of the patient. 24. The device of claim 13, wherein the location on the patient is at least in part internal to a skin region of the patient. 25. The device of claim 1, wherein the volume is capable of being in fluid communication with the location through the first opening and the second opening when the device engages with the patient. 26. The device of claim 1, wherein the port assembly is configured to fluidly couple the negative pressure source with the location through the first opening, the second opening, and the volume when the device engages with the patient. 27. The device of claim 1, wherein the first wall is beneath the compliant second wall.
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