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US 12,697,255 B2Granted
Negative pressure dressing assembly
AssigneeAatru Medical, LLC
InventorsJohn Buan, Richard L. Middaugh, Timothy Wojciechowski, Thomas E. Lash, Edward Armstrong
Life of this patent
Estimating the term…
Abstract
A negative pressure dressing assembly includes a drape including an aperture, a cover assembly selectively sealing the aperture in an air-tight manner, a reactor configured to react with a selected gas, and a sealing liner that forms a breakable seal that prevents the reactor from being exposed to the selected gas. The drape is applied to skin to form an enclosed volume between the drape and the skin. The reactor is configured to be activated by breaking the seal, and to be put into fluid communication with the enclosed volume to consume the selected gas from the enclosed volume to create a negative pressure in the enclosed volume.
Claims19
A negative pressure dressing comprising:
- a drape configured to seal to skin of a patient to define a portion of an air-tight enclosed volume under the drape and around a tissue site, the drape including an aperture extending through the drape from a top surface to a bottom surface of the drape and thus providing access to the enclosed volume under the drape;
- a cover assembly selectively sealing off the aperture in an air-tight manner to prevent a bulk flow of air from an external atmosphere through the aperture and into the enclosed volume, the cover assembly including a base attached to the drape, and a top that is moveable with respect to the base between an opened position and a closed position;
- a reactor configured to react with a selected gas found in air;
- and
- a sealing liner covering the reactor and forming a first seal that prevents the reactor from being exposed to the selected gas, the first seal being configured to be selectively broken so as to expose the reactor to the selected gas;
- wherein the reactor is configured to be selectively put in fluid communication with the enclosed volume so as to consume the selected gas in the enclosed volume;
- and
- wherein the top, when moved to the closed position, forms a second seal that seals off the aperture in an air-tight manner to inhibit a bulk flow of air between the external atmosphere and the enclosed volume,
- wherein the reactor is arranged on a top surface of the top.
6 more elements
A negative pressure dressing comprising:
- a drape configured to seal to skin of a patient to define a portion of an air-tight enclosed volume under the drape and around a tissue site, the drape including an aperture extending through the drape from a top surface to a bottom surface of the drape and thus providing access to the enclosed volume under the drape;
- a cover assembly selectively sealing off the aperture in an air-tight manner to prevent a bulk flow of air from an external atmosphere through the aperture and into the enclosed volume, the cover assembly including a base attached to the drape, and a top that is moveable with respect to the base between an opened position and a closed position;
- a reactor configured to react with a selected gas found in air;
- and
- a sealing liner covering the reactor and forming a first seal that prevents the reactor from being exposed to the selected gas, the first seal being configured to be selectively broken so as to expose the reactor to the selected gas;
- wherein the reactor is configured to be selectively put in fluid communication with the enclosed volume so as to consume the selected gas in the enclosed volume;
- and
- wherein the top, when moved to the closed position, forms a second seal that seals off the aperture in an air-tight manner to inhibit a bulk flow of air between the external atmosphere and the enclosed volume, wherein:
- the reactor is arranged in the enclosed volume;
- the sealing liner covers the reactor and extends through the aperture out of the enclosed volume to an exterior of the drape;
- and
- the sealing liner is configured to be pulled through the aperture, thus breaking the first seal and exposing the reactor to the selected gas in the enclosed volume.
9 more elements
A negative pressure dressing comprising:
- a drape configured to seal to skin of a patient to define a portion of an air-tight enclosed volume under the drape and around a tissue site, the drape including an aperture extending through the drape from a top surface to a bottom surface of the drape and thus providing access to the enclosed volume under the drape;
- a cover assembly selectively sealing off the aperture in an air-tight manner to prevent a bulk flow of air from an external atmosphere through the aperture and into the enclosed volume, the cover assembly including a base attached to the drape, and a top that is moveable with respect to the base between an opened position and a closed position;
- a reactor configured to react with a selected gas found in air;
- and
- a sealing liner covering the reactor and forming a first seal that prevents the reactor from being exposed to the selected gas, the first seal being configured to be selectively broken so as to expose the reactor to the selected gas;
- wherein the reactor is configured to be selectively put in fluid communication with the enclosed volume so as to consume the selected gas in the enclosed volume;
- and
- wherein the top, when moved to the closed position, forms a second seal that seals off the aperture in an air-tight manner to inhibit a bulk flow of air between the external atmosphere and the enclosed volume, wherein:
- the top and the base together form a one-piece sealing film,
- a release liner covers a bottom adhesive surface of the top,
- the release liner is selectively removeable from the bottom adhesive surface such that the bottom adhesive surface is exposed and can form the second seal against the top surface of the drape to seal off the aperture.
8 more elements
A negative pressure dressing comprising:
- a drape configured to seal to skin of a patient to define a portion of an air-tight enclosed volume under the drape and around a tissue site, the drape including an aperture extending through the drape from a top surface to a bottom surface of the drape and thus providing access to the enclosed volume under the drape;
- a cover assembly selectively sealing off the aperture in an air-tight manner to prevent a bulk flow of air from an external atmosphere through the aperture and into the enclosed volume, the cover assembly including a base attached to the drape, and a top that is moveable with respect to the base between an opened position and a closed position;
- a reactor configured to react with a selected gas found in air;
- and
- a sealing liner covering the reactor and forming a first seal that prevents the reactor from being exposed to the selected gas, the first seal being configured to be selectively broken so as to expose the reactor to the selected gas;
- wherein the reactor is configured to be selectively put in fluid communication with the enclosed volume so as to consume the selected gas in the enclosed volume;
- and
- wherein the top, when moved to the closed position, forms a second seal that seals off the aperture in an air-tight manner to inhibit a bulk flow of air between the external atmosphere and the enclosed volume, wherein:
- the reactor includes zinc and the selected gas is oxygen;
- and
- the zinc is included in an amount calculated using the following formula,
- (
- V
- air
- ×
- 1.23
- mg
-
- Zn
- /
- mL
- )
- +
- (
- 4.1
- ×
- 10
- -
- 3
-
- A
- P
- ·
- K
- P
- )
- ,
- where Vair is a size of the enclosed volume in mL, AP is a permeation area of the drape in cm2 that allows O2 to permeate into the enclosed volume through a thickness of the drape, and KP is a permeability in mL/(m2·day) to O2 through a thickness of the drape from the external atmosphere to a zero O2 volume.
35 more elements
Dependencies are inferred from the claim text.