U.S. patent number 3,927,669 [Application Number 05/416,444] was granted by the patent office on 1975-12-23 for bandage construction.
Invention is credited to Linda R. Glatt.
United States Patent |
3,927,669 |
Glatt |
December 23, 1975 |
Bandage construction
Abstract
A bandage construction that includes a sterile pad of a
hygroscopic material is sufficiently porous to admit air
therethrough, the pad being covered on the surface facing the wound
with a layer of a soft non-woven fabric. A strip-like element is
adhered over the outwardly directed surface of the pad and has
portions thereof extending beyond each end of the pad, and a width
that is substantially identical to that of the pad. The pad is
constructed of a cellular plastic foam which is hygroscopic,
non-allergenic and non-toxic, while at the same time it is
sufficiently porous to pass air therethrough such that the facing
surface of the wound is kept dry and provided with a continuous
supply of air.
Inventors: |
Glatt; Linda R. (Los Angeles,
CA) |
Family
ID: |
23650010 |
Appl.
No.: |
05/416,444 |
Filed: |
November 16, 1973 |
Current U.S.
Class: |
602/47;
602/59 |
Current CPC
Class: |
A61F
13/00021 (20130101); A61F 13/105 (20130101); A61L
15/58 (20130101); A61L 15/425 (20130101); A61F
2013/00812 (20130101); A61F 2013/00863 (20130101); A61F
13/511 (20130101); A61F 2013/00255 (20130101); A61F
2013/51411 (20130101); A61F 2013/00246 (20130101); A61F
2013/0074 (20130101); A61F 2013/530802 (20130101) |
Current International
Class: |
A61F
13/00 (20060101); A61L 15/16 (20060101); A61L
15/42 (20060101); A61L 15/58 (20060101); A61F
13/15 (20060101); A61L 015/00 () |
Field of
Search: |
;128/154,155,156 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Medbery; Aldrich F.
Attorney, Agent or Firm: Netter, Esq.; George J.
Claims
What is claimed is:
1. A bandage construction comprising:
a pliable strip;
a quantity of adhesive substantially covering one surface of said
strip; and
a hydrophilic pad of a porous air permeable cellular material, the
body portion surrounding the cells constituting a means for
tenaciously holding body fluids, said pad adhering to said strip
for being located in use over the wound and immediately adjacent
areas.
2. A bandage construction as in claim 1 in which said strip has
portions extending beyond the pad and which portions each include
at least one tear line of perforations.
3. A bandage construction as in claim 1 in which said pad is
constructed of a hydrophilic polyurethane foam.
4. A bandage construction as in claim 1 in which said pad and strip
are assembled such that they have common edges coextensive with
each other.
5. A bandage construction as in claim 1 in which the pad is
constructed of a foamed hydrophilic polyurethane having a thickness
sufficient to maintain permeability to air when compressed onto a
wound.
6. A bandage construction comprising:
an elongated rectangular foraminous strip of a flexible
plastic;
a pad of a hydrophilic air permeable foamed cellular plastic
material, the body portion surrounding the cells defining a means
for holding body fluids and having a width dimension substantially
identical to that of the strip and adhered to said strip separating
first and second portions of said strip extending beyond the pad;
and a cover of nonwoven material received over the pad exposed
surface.
7. A bandage constructionn as in claim 6, in which said cover
includes a relatively thin foraminous plastic sheet constructed of
a material which does not adhere to the skin or wound.
8. A bandage construction comprising:
an elongated pliable strip; and
a quantity of adhesive substantially covering one surface of said
strip;
a pad of porous air permeable hydrophilic cellular material having
a body portion surrounding the cells constituting a means for
holding body fluids when adhering to said strip for being located
in use over the wound and immediately adjacent areas, said pad
being constructed of a polyurethane foam having cellulosic material
incorporated therein.
Description
The present invention relates generally to a bandage construction,
and, more particularly, to a bandage construction which prevents
maceration where the bandage remains in place on the skin for an
extended period of time.
BACKGROUND OF THE INVENTION
A variety of bandage constructions are available on the market,
however, all of these are subject to the deficiency of producing
relatively extensive maceration about a wound when maintained in
place thereover for a period of time, e.g., longer than 24 hours.
The term maceration refers to a condition of the skin produced when
it is maintained in a damp, generally airless condition and is
characterized by a softened, puffy and wastedaway appearance.
Cotton gauze is the usual material from which bandages have been
made in the past and it hinders the free flow of air about the
wound and adjacent covered areas of the skin. Other known
constructions have made attempts to overcome or prevent maceration
by introducing a plurality of openings in the tape used to secure
the bandage in place and thereby direct air onto the skin. Even
with such a foraminous structure, the portion of the bandage which
is applied directly over the wound has a tendency to adhere closely
about the wound, thereby hindering the access of air to the skin in
the wound region and producing maceration. Also, although openings
have been provided in the tape portion of some bandages, the
materials from which that part of the bandage lying over the wound
have been made in the past prevented air flow to the wound
region.
OBJECTS AND SUMMARY OF THE INVENTION
It is a primary aim and object of the subject invention to provide
an improved bandage construction which is readily applied onto and
removed from a wound, and which can be maintained thereon for
extended periods without inducing maceration.
A further object of the present invention is to provide an improved
bandage which provides continuous protection of the wound, while
admitting air to the surface of the skin in the wound area.
Yet another object of the invention is the provision of a bandage
construction presenting a surface for contacting the wound and
adjacent areas thereof which is both hygroscopic and porous to
allow air therethrough.
The above and other objects are achieved by a bandage construction
which includes a sterile pad of a hygroscopic material which is
sufficiently porous to admit air therethrough, which pad is covered
on the surface facing the wound with a thin, soft non-woven fabric.
A strip-like element is received over the outwardly directed
surface of the pad and has portions thereof extending beyond each
end of the pad, and a width that is substantially identical to that
of the pad. The strip includes a plurality of relatively large
openings via which air can pass both to the skin and to the
air-permeable pad. An adhesive applied to the facing surface of the
strip-like element secures the pad in place and on the outwardly
extending portions is used to affix the bandage construction over
the wound.
The pad is constructed of a cellular plastic foam which is
hygroscopic, non-allergenic and non-toxic, while at the same time
it is sufficiently porous to pass air therethrough such that the
facing surface of the wound is kept dry and provided with a
continuous supply of air.
A further aspect of the invention is that the striplike element
portions extending beyond the pad have transverse perforations
allowing length modification, e.g., for application about small
fingers.
DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view of a bandage construction made in
accordance with this invention.
FIG. 2 is a side elevational view of the bandage construction.
FIG. 3 depicts the bandage construction being applied to a
finger.
FIG. 4 is a sectional view taken along line 4--4 of FIG. 3.
DESCRIPTION OF A PREFERRED EMBODIMENT
With reference now to FIGS. 1 and 2 simultaneously, the bandage
construction of this invention, identified generally as at 10, is
seen to include a pad 11 and pad cover 12, arranged on and affixed
to the intermediate regions of an elongated strip or strip-like
element 13.
More particularly, the pad 11, as seen best in FIG. 3 is
constructed of a cellular plastic foam material having a plurality
of interconnected pores or hollow cells which enables ready
permeation by the air. The pad has a generally rectangular shape
with a width dimension substantially identical to that of the
strip-like element 13. A major surface of the pad is affixed to the
flat surface of the strip in its central regions with the pad
peripheral edges coextensive with the edges of the strip. Any
suitable adhesive may be used for affixing the pad to the strip;
however, it must be kept in mind that for proper operation of the
subject invention, the adhesive must not be absorbed into the pores
of the pad to the extent that air permeation is prevented.
The pad cover 12 is preferably constructed of a thin sheet of
non-woven fabric which is soft to the touch and yet allows moisture
and air to readily pass therethrough. A thin layer of a suitable
cementitious material can be used to secure the pad cover onto the
pad. Another version of the cover is to construct it from a
relatively thin sheet of plastic having a number of openings
therethrough, the plastic being any one of a number of such
materials that adheres poorly (or not at all) to the skin or
portions of the wound.
It is important that the pad thickness, D, and the tensile strength
of the pad material be such that in normal application to or about
a wound, the pores or passages are not closed off. In an actual
construction, a pad constructed of a material to be further
described, had a width of 1/2 inch and a thickness, D, of
approximately 3/32 of an inch. This bandage could be wrapped
relatively tightly about, say, a finger, as in FIG. 3, and yet the
compressive forces involved did not fully close off the air
transmitting pores in the pad.
It is also important that the pad be constructed of a material
which absorbs moisture, e.g., mucus, perspiration and the like
directly from the wound and adjacent areas. By being suitably
hygroscopic, the pad maintains the area of the skin covered by the
pad dry, which also deters maceration and thereby promotes healing.
Also, in absorbing blood and the like, this promotes early
formation of a scab and thus, early healing.
An excellent material from which to construct the pad is a cellular
hydrophilic polyurethane foam having the trade designation of
Acquell foam, manufactured and sold by the Scott Paper Company of
Chester, Pennsylvania. This material not only has the desirable
porous structure permitting ready permeation by the air, but it is
also absorptive of liquids from the skin to the extent that it can
hold liquids many times its own weight in its body portion that
surrounds the cells and has the ability to retain fluids that is
far in excess of materials presently being used.
The above mentioned foam material differs from, say, conventional
urethane foams, in that it freely absorbs and tenaciously holds
liquids within the polymer material itself, as well as within the
void areas of the foam cells. It is this property of the foam to
take liquids directly into the foam mass or body rather than merely
into the foam pores that is referred to herein as
"hydrophilic."
The strip-like element 13 is preferably an elongated rectangular
structure constructed of a relatively thin, highly pliant plastic.
A plurality of openings are formed in the element for allowing the
air to readily pass therethrough, both through the pad and directly
to the skin. The perforations enable tearing off selective parts of
the strip portions to accommodate application about, say, a small
finger or to otherwise decrease overall size for ease of
application.
In assembly, a suitable adhesive is applied over one entire major
surface of the strip-like element 13. The pad is then pressed onto
the strip with its edges being coextensive with those of the
element. Lastly, the pad cover 12 is similarly adhered onto the pad
outwardly directed major surface, care being taken that the cover
is kept in registry with the pad and does not close in the pad
edges. The purpose of maintaining the cover in registry and
locating the pad edges coextensive to the strip edges is to insure
that during use the pad edges are not enclosed, since this is the
primary part of the pad through which the air can gain access to
the wound area.
A further material for constructing the pad consists of a foamed
polyurethane having cellulosic materials incorporated which not
only enhances absorption of fluids, but also positively retains the
absorbed fluids within the bandage.
* * * * *