U.S. patent application number 13/315639 was filed with the patent office on 2012-06-07 for multi-component dressing for wound treatment on the human or animal body with application of reduced pressure.
Invention is credited to Birgit Riesinger.
Application Number | 20120143157 13/315639 |
Document ID | / |
Family ID | 34673338 |
Filed Date | 2012-06-07 |
United States Patent
Application |
20120143157 |
Kind Code |
A1 |
Riesinger; Birgit |
June 7, 2012 |
MULTI-COMPONENT DRESSING FOR WOUND TREATMENT ON THE HUMAN OR ANIMAL
BODY WITH APPLICATION OF REDUCED PRESSURE
Abstract
The invention relates to a multi-component dressing (100) for
treating wounds of the human or animal body using a reduced
pressure, having a wound-covering element (4) for mounting the
dressing (100) at the surface of the skin and the mucous membrane
and at least one connecting site (5), which is in contact with the
wound space (10) and over which the materials in the wound space
(10) can be evacuated. The multi-component dressing has
super-absorbing polymers, the absorbed wound secretions remaining
bound to polymers in the wound space until the latter are removed
from the wound space and the polymers, due to their binding
capacity, supporting reciprocal synergies with the sub-atmospheric
pressures. Wound exudate, promoted by the reduced pressure, is also
stored and controlled by polymerized granulates.
Inventors: |
Riesinger; Birgit;
(Ostbevern, DE) |
Family ID: |
34673338 |
Appl. No.: |
13/315639 |
Filed: |
December 9, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12856287 |
Aug 13, 2010 |
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13315639 |
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11666848 |
Jul 5, 2007 |
7775998 |
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PCT/EP2005/011701 |
Nov 2, 2005 |
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12856287 |
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Current U.S.
Class: |
604/319 |
Current CPC
Class: |
A61F 13/00063 20130101;
A61F 13/00012 20130101; A61F 2013/00153 20130101; A61F 2013/00936
20130101; A61F 2013/0054 20130101; A61F 2013/00182 20130101; A61F
2013/00846 20130101; A61F 2013/00561 20130101; A61F 2013/00174
20130101; A61F 13/0209 20130101; A61F 13/00068 20130101; A61M
1/0092 20140204; A61M 1/0003 20130101; A61F 2013/00536 20130101;
A61F 13/025 20130101; A61F 2013/00714 20130101 |
Class at
Publication: |
604/319 |
International
Class: |
A61M 1/00 20060101
A61M001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 2, 2004 |
DE |
20 2004 017 052.3 |
Claims
1. A multi-component wound dressing for treating a wound on a human
or animal body using a reduced pressure, said dressing comprising a
wound covering element adapted to be applied to the surface of the
skin to cover the wound, thereby forming a wound space, said wound
covering element having at least one connector through which
material in the wound space can be evacuated, wherein the dressing
has super-absorbing polymers, which absorb wound secretions in the
wound space; the absorbed wound secretions, bound to the polymers,
remain in the wound space until the polymers are removed; and the
polymers, due to their bonding capacity, support reciprocal
synergies with the sub-atmospheric pressures.
Description
RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 12/856,287, filed on Aug. 13, 2010, which is a continuation of
U.S. application Ser. No. 11/666,848, filed on Jul. 5, 2007, which
is the national stage of PCT/EP2005/011701, filed on Nov. 2, 2005,
which claims the benefit of German application 20 2004 017 052.3,
filed on Nov. 2, 2004. The contents of all of the foregoing
applications are hereby incorporated by reference in their
entirety
BACKGROUND OF THE INVENTION
[0002] The invention relates to a multi-component dressing for
treating wounds of the human or animal body using a reduced
pressure, having a wound-covering element for mounting the dressing
at the surface of the skin and mucous membrane and at least one
connecting site, which is in contact with the wound space and over
which the materials, in the wound space, can be evacuated.
[0003] Such a multi-component dressing is known from U.S. Pat. No.
5,636,643. It is a disadvantage of the known multi-component
dressing that the wound secretion can be withdrawn from the region
of the wound exclusively over a hose line.
BRIEF SUMMARY OF THE INVENTION
[0004] It is an object of the invention to conceive a novel
multi-component dressing, for which the wound secretions can remain
in the region of the wound without these wound secretions being
able to develop their harmful properties in the region of the
wound.
[0005] This objective is accomplished by a multi-component dressing
of the type named above, which is characterized in that this
dressing has super-absorbing polymers, the absorbed wound
secretions remaining bound to the polymers in the wound space,
until the latter are removed from the wound space, the polymers,
due to their binding capacity, supporting reciprocal synergies with
the sub-atmospheric pressures.
[0006] All known polymers, preferably however those from the group
of sodium polyacrylates, may be selected as polymers.
[0007] The multi-component dressing may be provided with at least
one enveloping absorption body, which has at least one layer of a
textile section, which is interspersed with super-absorbing
particles.
[0008] The absorption body may be surrounded by a liquid-permeable
envelope, which, in turn, has pores, the size of which essentially
does not exceed that of the super-absorbing particles. The reduced
pressure, generated on the outside, is passed over a hose line or
optionally over a suction head into the wound space, where it
supports desired synergies with the polymers.
[0009] For a full understanding of the present invention, reference
should now be made to the following detailed description of the
preferred embodiments of the invention as illustrated in the
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIGS. 1a to 1d show a multi-component dressing, glued to the
skin of the patient about a wound, in a diagrammatic section.
[0011] FIG. 2 shows a different embodiment of the multi-component
dressing in a diagrammatic section.
[0012] FIG. 3 shows the multi-component dressing of FIG. 1,
however, with two connection sites, also in a diagrammatic
section.
DETAILED DESCRIPTION OF THE INVENTION
[0013] FIGS. 1a to 1d show a multi-component dressing 100 for
treating wounds using a reduced pressure, consisting of a film-like
wound-covering element 4, an optional film element 1, which is
compatible with the mucous membrane and, lying between these, an
absorption body 2. In a plan view of its flat side, the
multi-component dressing is somewhat rectangular and has rounded
corners (not shown).
[0014] The wound-covering element 4, consisting of a
liquid-impermeable, transparent film, is a relatively stiff, that
is, it does not shrink when not in use and when in contact with the
body of the patient. At its periphery 8, the wound-covering element
4 is provided with an adhesive surface 6 for gluing the
multi-component dressing to the skin of the patient.
[0015] The absorption body 2 consists of a layer of nonwoven
textile material, which comprises cellulose fibers and is
interspersed with super-absorbing particles
(Super-Absorbing-Polymers, SAP), in the present case, with a
copolymer of sodium acrylate and acrylic acid. In addition, the
absorption body 2 is enriched with nanocrystalline,
silver-containing substances, which have a microbiocidal effect.
The cellulose fibers act as an interim storage system for the
liquid quantities, which are acted upon spontaneously, and as a
sort of transporting means, with which the wound secretions reach
the super-absorber.
[0016] The absorption body 2 is surrounded by a liquid-permeable,
also textile envelope 11, which has been welded closed
ultrasonically with a peripheral seam 7. As can be inferred
particularly from FIG. 1d, the envelope has a peripheral overhang
30 of envelope material, which is located between the ultrasonic
seam 7 and an outermost circumference 11 of the envelope. The
overhang 30 is to prevent painful contact between the wound and the
seam.
[0017] The film element 1, facing the wound, is made from a
liquid-permeable, extremely thin, mucus membrane-compatible
material. The film element 1 also contributes to protecting against
contact with the ultrasonic seam 7.
[0018] Moreover, a connecting site 5.1 for evacuating gases and
checking the vacuum is provided at the wound-covering element 4.
According to FIGS. 1a to 1d and 2, the connecting site 5.1 is
disposed approximately centrally. However, it may be located at any
place on the wound-covering element, for example, in the vicinity
of the periphery 8, as has been shown in FIGS. 2 and 3.
[0019] The absorption body 2, which is to be placed in the wound
space 10, has an initial volume V1, which enlarges in the course of
the absorption process and assumes a final volume V2, with which
the wound space 10 and, with that, the wound defects can be filled
during the swelling process.
[0020] Active substances, which affect the wound-healing process 1,
such as nanocrystalline silver particles, are applied to the
material of the absorption body 2.
[0021] As shown by FIG. 1d, the absorption body 2 is glued over its
whole surface to the wound-covering element 4, a periphery 8 at the
wound-covering element being left free.
[0022] The multi-component dressing of FIG. 3 has two connecting
sites 5.1, 5.2, of which the central one is for evacuating air and
the second, lateral one for controlling the reduced pressure. A
vacuum bottle 20 is connected over a hose line 15 to the central
connecting site 5.1. On the other hand, an intermittent circuit 18
is connected, also over a connecting hose 19, with the lateral
connecting site 5.2. FIG. 2 shows a similar dressing 300 having a
controlled source of vacuum 23.
[0023] A chronic wound 16 is covered completely by gluing the
multi-component dressing 100 of FIG. 1 to the skin of the patient.
Previously, a pull-off film element (not shown), and exposes a
peripheral adhesive surface 6 at the underside of the
wound-covering element 4, was removed. To begin with, the mucous
membrane-compatible film element 1 and then the flat absorption
body 2 together with its envelope were placed carefully, with
sterilized forceps, on the surface of the wound. Only then was the
wound covering element 4 glued around the wound. By gluing the
device to the skin, a wound space 10 is formed between the wound
covering element 4 and the surface of the wound. A medical
injection syringe 26 was connected over the aforementioned hose
line 15 with the central connecting site 5.1, which is provided
with a simple valve 25, as shown in FIG. 1a. Since the space 10 is
sealed, the gases in the space can be evacuated with the aid of the
injection syringe. This state is shown in FIG 1b. The flat elements
of the device lie in contact with the surface of the wound. The
reduced pressure, measured meanwhile with the aid of a vacuum
indicator (now shown), was about 100 mm Hg. For this purpose, the
cylindrical casing surface of the injection syringe may be provided
with an appropriate, experimentally defined, reduced pressure
scale. The wound secretions, emerging from the wound, reach the
absorption body 2 and bring about a slowly increasing compression
beneath the wound-covering element 4. After wound secretions are
aspired, the volume of the absorption body 2 increases greatly (see
FIG. 1c). After use, the device 100 is removed carefully from the
region of the wound by lifting it with the help of the forceps. If
necessary, a new multi-component dressing can be glued to the
wound.
[0024] There has thus been shown and described a novel
multi-component dressing for treating wounds of the human or animal
body using a reduced pressure which fulfills all the objects and
advantages sought therefor. Many changes, modifications, variations
and other uses and applications of the subject invention will,
however, become apparent to those skilled in the art after
considering this specification and the accompanying drawings which
disclose the preferred embodiments thereof. All such changes,
modifications, variations and other uses and applications which do
not depart from the spirit and scope of the invention are deemed to
be covered by the invention, which is to be limited only by the
claims which follow.
* * * * *