U.S. patent number 3,576,039 [Application Number 04/758,388] was granted by the patent office on 1971-04-27 for absorbent underpad with securing means.
This patent grant is currently assigned to C. R. Bard, Inc.. Invention is credited to Donald R. Roberts.
United States Patent |
3,576,039 |
Roberts |
April 27, 1971 |
ABSORBENT UNDERPAD WITH SECURING MEANS
Abstract
An absorbent underpad for hospital patients comprising a liquid
permeable upper sheet, a body of liquid absorbent material, an
impermeable backing sheet and pressure activated releasable
adhesive areas located adjacent corners of the backing to hold the
underpad in place under the patient, the same adhesive areas
serving, when the used underpad is folded in a specified manner, to
hold the pad closed and prevent spillage of the contents pending
disposal.
Inventors: |
Roberts; Donald R. (North
Plainfield, NJ) |
Assignee: |
C. R. Bard, Inc. (Murray Hill,
NJ)
|
Family
ID: |
25051556 |
Appl.
No.: |
04/758,388 |
Filed: |
September 9, 1968 |
Current U.S.
Class: |
5/484; 5/500 |
Current CPC
Class: |
A61F
5/485 (20130101); A61F 2013/583 (20130101); A61F
13/58 (20130101); A61F 2013/5661 (20130101); A61F
2013/51409 (20130101) |
Current International
Class: |
A61F
5/48 (20060101); A61F 13/15 (20060101); A61F
13/56 (20060101); A61g 007/04 () |
Field of
Search: |
;5/91,90,92,353,354,344,334,345 ;128/290,132 (D)/ ;128/295,287 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Downey; Kenneth
Claims
I claim:
1. A substantially rectangular absorbent underpad comprising a body
of liquid absorbent material, a backing sheet of liquid impermeable
material, pressure actuated adhesive areas located adjacent each
corner of said backing sheet and being adapted to engage a bed
sheet and to be cleanly released from said bed sheet without
leaving a residue, the underpad being provided with two parallel
fold lines parallel to and spaced from two opposite edges and with
two parallel fold lines perpendicular to said first mentioned lines
and spaced from the other two opposite edges, whereby the adhesive
areas can engage a bed sheet and hold the underpad against movement
while in use and can engage other parts of the underpad when the
latter is folded sequentially along said fold lines after use.
Description
This invention relates to an improvement in absorbent underpads as
used, particularly, in hospitals or the like to prevent soiling of
bedding by incontinent, postoperative and other type patients. The
involuntary release of body fluids through postoperative drainage,
incontinency, etc. requires that the patient have placed under him
an absorbent pad consisting, preferably, of a fluid pervious
facing, a fluid absorbing medium of relatively high capacity and a
fluid impervious backing, such pads being commonly made in a range
of sizes which may be 171/2 inches .times. 24 inches, 23 inches
.times. 24 inches or 23 inches .times. 36 inches.
During use, the movement of the patient will quite often cause the
absorbent pad to slip causing it to move away from the desired
location, or (which is more serious) allow it to "ball up" under
the patient. Obviously this defeats the purpose of the pad and
exposes the bed linen to soiling not to mention patient discomfort.
To overcome this, the nurse will normally place multiple pads under
the patient to overcome these problems--thereby bringing about
abnormally high usage of an item which was designed to be used
singly.
Another problem encountered by the patient care staff is the
disposing of the underpads. The soiled pad must be removed from the
bed and either rolled, folded or "balled up" prior to inserting it
into a disposal unit--plastic, fabric bag or other container. Since
the soiled portions can become exposed, the chance of cross
contamination becomes a serious problem. Thus it becomes obvious
that the now existent patient underpad leaves much to be desired
from the standpoint of patient comfort, functionality, cleanliness
and economics.
It is an object of the present invention to eliminate the problems
as outlined above. The basic construction of the now existent
underpad need not be drastically modified from its present design
or construction. It requires only the addition of a pressure
sensitive adhesive component to each of the four corners on the
back of the pad. In its preferred embodiment each outside corner of
the back of the pad is supplied with a pressure sensitive component
approximately 1.5.times.1.0 inch in size which is suitably covered
with a peelable masking component. During use the peelable unit is
removed and the pad is positioned under the patient and the corners
firmly pressed down to adhere to the bedding. Thus secured, the pad
should remain properly in place under the patient even though he
moves about.
Once soiled, the pad is removed by lifting the four outer corners
to disengage the adhesive and is slid out from under the patient.
The pad is folded lengthwise in thirds, bringing two of the
adhesive areas into positions to engage the second folded over
portion of the pad, with the other two adhesive areas exposed on
the upper surface of said portion. The pad is then folded in thirds
lengthwise, one of the second adhesive areas holding the first
folded end portion down on the middle surface and the last adhesive
area then holding the second folded end portion down on the first
portion. In this folded and sealed condition all soiled surfaces
are on the inside and only the unsoiled impervious backing is
exposed. The soiled pad is now a flat, folded, compact,
space-saving unit with the danger of spillage minimized and a clean
dry surface available for easy handling and disposal.
A practical embodiment of the invention is shown in the
accompanying drawing wherein:
FIG. 1 represents a plan view of a typical underpad;
FIG. 2 represents a transverse vertical section on the line II--II
of FIG. 1; and
FIGS. 3, 4, 5 and 6 represent plan views showing successive stages
in the folding operation.
Referring to the drawings, the underpad is shown as comprising an
impervious backing sheet 1, of polyethylene or equivalent plastic
material, absorbent means 2 which may conveniently be quantities of
hydrous calcium silicate powder enclosed in permeable paper
envelopes, a distribution layer 4, preferably of material having a
"wicking" effect to pass liquids quickly from the upper surface to
the absorbent means, and a permeable upper facing 5 which may
suitably be a porous nonwoven fabric. The backing sheet 1 is shown
at 6 in FIG. 2, as extending around two opposite edges of the
underpad, being sealed to the upper facing to form a laterally
closed package. The absorbent material envelopes may be adhesively
secured at suitable points to the backing sheet 1 and distribution
layer 4 in order to retain all elements in their desired respective
positions.
It will be noted that nine envelopes 2 are shown, each having a
length and width less than one-third the length and width of the
underpad respectively, the outer envelopes being spaced from the
middle ones to leave longitudinal fold lines 7,8, along which lines
there are only three layers of material, 1, 4 and 5, as well as
corresponding transverse fold lines. Alternatively, the envelopes
in each horizontal row, as shown in FIG. 1, may be formed as a
single elongated envelope, without the provision of transverse fold
lines.
An important feature of the invention is the attachment, on the
under surface adjacent each corner, of adhesive spots 9, 10, 11 and
12, preferably constituted by pieces of double face adhesive tape
characterized by "differential tack" so as to adhere strongly to
the backing sheet 1 and to have and exposed surface which adheres
less tenaciously to a bed sheet or the like with which it is placed
in contact. The exposed surface must also be cleanly removable from
the sheet without leaving any residue. The latter surfaces are
covered, prior to use, with removable protective strips, as is
customary.
An underpad having the features described can be placed under a
patient, adhesively secured to the bed sheet, and left in place
with confidence that it will not shift or roll into folds, lumps or
balls. When soaked to capacity, the underpad is removed, folded
along the line 7 to expose upwardly the adhesive spots 9 and 10
(FIG. 3), and folded along the line 8 to expose upwardly the
adhesive spots 11 and 12 while covering the spots 9 and 10, which
may then adhere to the surface of the second folded strip (FIG. 4).
The elongated folded strip, with all the accumulated effluent
inside, is then further folded in thirds, one end being folded
toward the other (FIG. 5) to bring the adhesive spot 12 into
contact with a corresponding area of the backing 1, to which it
adheres, and the other end being folded over said first end so that
the spot 11 can adhere to a corresponding area of the backing,
making a flat closed package (FIG. 6), completely dry on the
outside and readily disposable without danger of spillage.
It will be appreciated that other forms of underpads can be
provided with adhesive spots, similarly located, for use and
disposal as described. Whatever the specific composition of the pad
may be, however, it should preferably be designed for folding along
two parallel longitudinal fold lines and again along two parallel
transverse fold lines, whether or not the lines divide the pad into
equal "thirds." Thus, for instance, the center section either or
both ways may be longer than the side or end sections, so long as
the latter overlap sufficiently to cover and enclose the
contents.
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