USRE48007E1 - Vented emergency wound dressings - Google Patents
Vented emergency wound dressings Download PDFInfo
- Publication number
- USRE48007E1 USRE48007E1 US16/144,170 US201816144170A USRE48007E US RE48007 E1 USRE48007 E1 US RE48007E1 US 201816144170 A US201816144170 A US 201816144170A US RE48007 E USRE48007 E US RE48007E
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- United States
- Prior art keywords
- backing layer
- wound dressing
- cover
- wound
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/02—Adhesive plasters or dressings
- A61F13/0259—Adhesive plasters or dressings characterised by the release liner covering the skin adhering layer
- A61F13/0263—Adhesive plasters or dressings characterised by the release liner covering the skin adhering layer especially adapted for island dressings
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/02—Adhesive plasters or dressings
- A61F13/0203—Adhesive plasters or dressings having a fluid handling member
- A61F13/0213—Adhesive plasters or dressings having a fluid handling member the fluid handling member being a layer of hydrocoloid, gel forming material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F17/00—First-aid kits
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F2013/00361—Plasters
- A61F2013/00655—Plasters adhesive
- A61F2013/00676—Plasters adhesive hydrogel
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dispersion Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Dermatology (AREA)
- Materials For Medical Uses (AREA)
Abstract
A wound dressing provides a tenacious occlusive seal against the skin of a wearer, even in the presence of excessive blood or heavy perspiration. The preferred embodiment combines an adhesive backing layer with a hydrogel island providing superior hydrophilic gel adhesion. The product performs under extreme temperatures (i.e., 32-140° F.), and may be used to hold other dressings in place. The preferred embodiments are entirely translucent, and include a large pull-tab for easy removal. Two dressings may be packaged in a pliable re-sealable protective pouch, thereby forming a portable “kit.” Different “vented” embodiments are disclosed. A preferred structure includes a cover layer peripherally bonded to backing and hydrogel layers having a central aperture therethrough. The cover layer has one or more vent holes, and pressure is released through the central aperture and out the vent hole(s).
Description
This application claims priority from U.S. Provisional Patent Application Ser. No. 61/915,198, filed Dec. 12, 2013, and is also a continuation-in-part of U.S. patent application Ser. No. 12/748,008, filed Mar. 26, 2010, which claims priority from U.S. Provisional Patent Application Ser. No. 61/163,613, filed Mar. 26, 2009, the entire content of all of which is incorporated herein by reference.
This invention relates generally to wound dressings and, in particular, to a wound dressing that provides a unique combination of a flexible backing material and hydrogel to provide a safe and effective patch for emergency situations, including battlefield applications.
There are instances when an emergency wound dressing may be required not only to stop bleeding, but also to block the transfer of gasses to or from the lungs. Bullet wounds in battlefield situations represent one such need. Until now, however, there are few if any bandages that will remain affixed to a recipient given heat and moisture from weather, sweating, and so forth.
This invention is a wound dressing that uses a novel combination of materials to provide a tenacious occlusive seal, even in the presence of excessive blood or heavy perspiration. The preferred embodiment combines an adhesive backing layer with a hydrogel island providing superior hydrophilic gel adhesion. The product performs under extreme temperatures (i.e., 32-140° F.), and may be used to hold other dressings in place. The preferred embodiments are entirely translucent, and include a large pull-tab for easy removal. One or two dressings may be packaged in a pliable re-sealable protective pouch.
Different “vented” embodiments are disclosed. A preferred structure includes a cover layer peripherally bonded to backing and hydrogel layers having a central aperture therethrough. The cover layer has one or more vent holes, and pressure is released through the central aperture and out the vent hole(s).
This invention is a wound dressing that uses a novel combination of materials to provide a tenacious occlusive seal, even in the presence of excessive blood or heavy perspiration. FIG. 1 is a plan view drawing that illustrates a preferred embodiment of the invention, including a backing layer 104 and a pre-formed hydrogel pad 102. The backing layer 104 is preferably a flexible polyethylene “tape” (i.e., 3.0 mil) having a hypoallergenic pressure-sensitive water-resistant adhesive such as an acrylic adhesive 500. The hydrogel pad 102 may be obtained from Katecho, Inc. of Des Moines, Iowa (product code KM-10). The hydrogel material may be obtained from Katecho, Inc. of Des Moines, Iowa (product code KM-10). The backing material may be obtained from 3M Corp. of St. Paul, Minn. Other vendors are possible.
The hydrogel pad 102 preferably has a periphery 106 spaced apart from the periphery of the backing layer 104 in all dimensions to expose the adhesive layer. An adhesive-free tab 108, which may be embossed, is used to release the pad from a release liner 110. The release liner 110 extends beyond all sides of the backing layer 104, as shown in FIGS. 1-5 . The release liner may be a 3.0 mil PET layer. In terms of dimensions, the dressing has a preferred width on the order of 3 to 6 inches and a preferred length on the order of 4 to 8 inches. Other forms besides ovals may be used, including circles, squares and rectangles. Materials other than polyethylene may be used for the backing layer 104 so long as the adhesive and combined system is sufficiently tenacious in terms of adherence to the skin.
On occasion, the wound dressing may need to vent pressure built up from a chest cavity, for example. To address this, one or more vents such as 204 may be provided as shown in FIG. 2 . As pressure builds around a wound in region 202, it will be released through vent 204. As a further alternative, a passive or active status sensor may be used to indicate a user condition or to show that pressure release has occurred. As shown in FIG. 3 , such a monitor 302 may be passive, using dyes or other materials which change color in the presence of oxygen or other gasses, for example. The detector may be active, for example, using an electronic pressure sensor, an acoustic sensor (to detect lung sound) or resistive sensor (to detect perspiration or breathing) and a visual indicator such as an LED. The light may have different colors to convey status (i.e., green =OK; yellow =concern; red =emergency).
In all embodiments, beneficial or therapeutic substances may be added to the hydrogel layer. For example, a clotting agent such as calcium carbonate may be added to aid in clotting, and/or an antimicrobial such as chlorhexidine digluconate may be used. Such substances may be in the range of 1-5% or thereabout.
In the embodiment of FIG. 6 , the entire bottom surface of the backing layer 604 is coated with an adhesive shown by the hatching, and the hydrogel pad 602, which is preformed into the shape depicted, is adhered to the backing layer using the adhesive layer, the hydrogel itself, or both. Once adhered, the hydrogel forms an island having a periphery spaced apart from the periphery of the backing layer 104 in all dimensions to expose the adhesive layer. An adhesive-free tab 608 may be provided to release the dressing from a release liner 610. The release liner may be a 3.0 mil PET layer.
In terms of dimensions, the dressing of FIGS. 6, 8 has a preferred width on the order of 3 to 6 inches and a preferred length on the order of 4 to 8 inches. Other shapes besides ovals may be used, including circles, squares and rectangles. Materials other than polyethylene may be used for the backing layer 604 so long as the adhesive and combined system is sufficiently tenacious. A set of applicable dimensions are provided in FIG. 8 . Two dressings may be folded against one another and placed in a pouch shown in FIG. 9 which may be re-sealable, thereby forming a dressing/carrier “kit”
Returning to FIG. 6 , both the hydrogel layer 602 and backing layer 604 include a central aperture 612 which may be round with a preferred diameter in the range of 0.5 to 1.5 inches. Other dimensions and shapes including oval may be used. On the outer side of the backing layer, facing away from the recipient, there is attached a cover 614 having vent holes 616, 618. The cover 614 is peripherally bonded to the outer surface of the backing layer along line 620. The cover 614 may be the same material as the backing material, 3M No. 1526, and may have roughly the same outer dimensions as the hydrogel pad. The cover 614 may be attached to the backing layer with or without an adhesive, using thermal welding, for example. The Any appropriate peripheral adhesive may be used, including UV-cured products.
Claims (17)
1. A wound dressing, comprising:
a backing layer having a periphery, a front surface with an adhesive layer adapted for patient contact and a back surface facing away from the patient;
a preformed hydrogel pad having a periphery, the hydrogel pad being attached to the front surface of the backing layer, the hydrogel pad and backing layer both further including aligned central apertures;
the periphery of the hydrogel pad being less than that of the backing layer such that a ring of the adhesive layer remains exposed around the hydrogel pad;
a cover peripherally bonded directly to the back surface of the backing layer so as to create an expandable pocket between the cover and the back surface of the backing layer;
wherein the cover includes at least one vent hole through the cover passage such that pressure from the wound temporarily expands the pocket, enabling liquids or gasses from the wound to be vented through the apertures, through the pocket, and out the at least one vent hole passage to atmosphere; and
after the pressure is relieved or with negative pressure, the cover falls back onto the backing layer, thereby eliminating the pocket between the cover and the back surface of the backing layer and maintaining a seal around the wound.
2. The wound dressing of claim 1 , wherein the backing layer with the hydrogel pad attached thereto are temporarily held against a larger release layer.
3. The wound dressing of claim 1 , wherein the backing layer is a polyethylene tape.
4. The wound dressing of claim 1 , further including an adhesive-free tab a pull-tab on the backing layer to assist in removing the wound dressing from the release layer.
5. The wound dressing of claim 1 , further including a pouch to protect the dressing, thereby providing a portable kit.
6. The wound dressing of claim 1, having a shape that is circular.
7. The wound dressing of claim 1, having a shape that is rectangular.
8. The wound dressing of claim 1, having a width in the range of 3 to 6 inches.
9. The wound dressing of claim 1, having a length in the range of 4 to 8 inches.
10. A wound dressing, comprising:
a backing layer having a periphery, a front surface adapted for patient contact and a back surface facing away from the patient;
a hydrogel pad having a periphery attached to the front surface of the backing layer, the hydrogel pad and backing layer both further including aligned central apertures;
the periphery of the hydrogel pad being less than that of the backing layer;
a cover having an inner surface bonded directly to the back surface of the backing layer, with the periphery of the cover being larger that the aligned central apertures of the hydrogel pad and the backing layers, thereby forming a pocket between the back surface of the backing layer and the inner surface of the cover;
wherein the pocket formed between the back surface of the backing layer and the inner surface of the cover communicates with at least one passage enabling liquids or gasses from the wound to be vented through the apertures and the pocket to atmosphere; and
wherein, after the pressure is relieved or with negative pressure, the cover falls back onto the backing layer, thereby eliminating the pocket between the cover and the back surface of the backing layer and maintaining a seal around the wound.
11. The wound dressing of claim 10, wherein the backing layer with the hydrogel pad attached thereto are temporarily held against a release layer.
12. The wound dressing of claim 11, further including a pull-tab on the backing layer to assist in removing the wound dressing from the release layer.
13. The wound dressing of claim 10, further including a pouch to protect the dressing, thereby providing a portable kit.
14. The wound dressing of claim 10, wherein the wound dressing is circular.
15. The wound dressing of claim 10, wherein the wound dressing is rectangular.
16. The wound dressing of claim 10, having a width in the range of 3 to 6 inches.
17. The wound dressing of claim 10, having a length in the range of 4 to 8 inches.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/144,170 USRE48007E1 (en) | 2009-03-26 | 2018-09-27 | Vented emergency wound dressings |
US16/424,117 US20190298578A1 (en) | 2009-03-26 | 2019-05-28 | Vented emergency wound dressings with anti-thrombogenic layers |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US16361309P | 2009-03-26 | 2009-03-26 | |
US74800810A | 2010-03-26 | 2010-03-26 | |
US201361915198P | 2013-12-12 | 2013-12-12 | |
US14/247,884 US9452088B2 (en) | 2009-03-26 | 2014-04-08 | Vented emergency wound dressings |
US16/144,170 USRE48007E1 (en) | 2009-03-26 | 2018-09-27 | Vented emergency wound dressings |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/247,884 Reissue US9452088B2 (en) | 2009-03-26 | 2014-04-08 | Vented emergency wound dressings |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/424,117 Continuation-In-Part US20190298578A1 (en) | 2009-03-26 | 2019-05-28 | Vented emergency wound dressings with anti-thrombogenic layers |
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USRE48007E1 true USRE48007E1 (en) | 2020-05-26 |
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US16/144,170 Active USRE48007E1 (en) | 2009-03-26 | 2018-09-27 | Vented emergency wound dressings |
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