Source: http://www.docstoc.com/docs/40031791/Wound-Irrigation-Andor-Drainage-Device---Patent-4778446
Timestamp: 2015-06-03 08:44:38
Document Index: 758414020

Matched Legal Cases: ['Application No. 2', 'Application No. 2', 'Application No. 82', 'art 34', 'art 34', 'art 36', 'arts 34']

Wound Irrigation And/or Drainage Device - Patent 4778446 by Patents-188
40031791
The present invention relates to wound irrigation and/or drainage devices and, more particularly, to a wound irrigation and/or drainage device which utilizes a self-supporting collar toprotect the wound from contact, flexible mounting means which permits the adhesive-backed member to more readily accommodate the contours of the body, and a novel cover member designed to permit insertion of a catheter into the wound.It is preferable in the treatment of certain types of wounds, particularly postoperative wounds, and certain skin disorders such as ulcers, burns, sores, and the like, to irrigate the affected region with fluid, such as antiseptic liquid orhyperbaric oxygen. In addition, certain types of wounds require periodic drainage. Various types of devices have been proposed for these applications. Certain of these devices are designed to be mounted to the patient's body, surrounding the afflictedregion, for an extended period of time to permit periodic irrigation and/or drainage. It is often necessary that the wound be visible for purposes of observation and, accordingly, devices of this type are normally provided with a transparent portionwhich permits observation of the affected region.One device of this type which is commercially available is described in British Patent Specification No. 1,549,756, entitled "A Wound Irrigating Device." That device includes a rectangular, transparent, flexible plastic cover mounted on a rimwith an adhesive back. The rim is situated on the skin of the patient surrounding the wound such that the wound is aligned with the hollow chamber defined by the cover. An entry port and an exit port are provided for irrigating fluid. A conventionalD.U. infusion set may be connected to the entry port, to permit a fluid such as hydrogen peroxide to be flushed through the device. The plastic cover may be transversely ribbed to increase the flexibility of the device in the longitudinal direction.In the absence of any substantial external
United States Patent: 4778446
4,778,446
Wound irrigation and/or drainage device
To prevent contact with the wound, a semi-rigid cylindrical hollow
open-ended collar is mounted to an adhesive label by a flexible sheet. The
sheet is sealed to the periphery of the lower end of the collar and
ring-welded or adhesively attached to the surface of the label. The
periphery of the sheet has an outwardly extending accordion-like section
which expands to permit the label to accommodate the contours of the body.
Irrigation ports may be situated in the collar wall. A drain port may be
situated in the flexible sheet. The upper open end of the collar is
designed to receive a removable cover which may have a transparent
portion. Alternatively, the cover member may be provided with a flexible
section surrounding an opening adapted to receive a catheter.
Jensen; Ole R. (River Vale, NJ)
06/513,740
604/27  ; 604/317
A61M 27/00&amp;nbsp(20060101); A61M 001/00&amp;nbsp()
604/27-29,48,73,289,277,332-345,317 128/760,767,762,157 141/59
3123074
4023569
Wavnecke et al.
1549756
1.  A wound irrigation and/or drainage device comprising a flexible microporous adhesive-backed member having an aperture adapted to align with the wound when the device is mounted on the
body of the wearer, a substantially rigid hollow cylindrical member having first and second open ends, expandable means for mounting one of said ends of said cylindrical member to said adhesive member, in alignment with said aperture, a cover member,
means for releasably mounting said cover member to said other end of said cylindrical member to form a substantially fluid-tight chamber in communication with said aperture, at least one fluid port in said chamber, said cylindrical member being
sufficiently self-supporting to maintain said cover member at a position remote from the wound.
2.  The device of claim 1, wherein said cylindrical member comprises a substantially self-supporting upstanding wall.
3.  The device of claim 2, wherein said port is situated in said wall.
4.  The device of claim 3, further comprising a second port in said wall.
5.  The device of claim 1, wherein said expandable means for mounting said body member to said adhesive member comprises a substantially flexible sheet, one end of which is mounted to said one end of said body member and the other end of which is
joined to said adhesive member.
6.  The device of claim 5, wherein said expandable means comprises an accordion-like fold.
7.  The device of claim 6, wherein said fold extends outwardly of said body member.
8.  The device of claim 5, wherein said sheet is joined to said adhesive member so as to surround said aperture.
9.  The device of claim 5, wherein said sheet is joined to said adhesive member at a point spaced from said aperture.
10.  The device of claim 5, wherein said port is in said flexible sheet.
11.  The device of claim 5, wherein said sheet is joined to said adhesive member by a ring weld.
12.  The device of claim 5, wherein said sheet is joined to said adhesive member by a substantially annular adhesive layer.
13.  The device of claim 1, wherein said cover member has a transparent portion.
14.  The device of claim 1, wherein said cover member has a surface with an opening adapted to receive a tube therethrough.
15.  The device of claim 14, wherein said cover member comprises means for sealing said surface to the tube.
16.  The device of claim 15, further comprising means for joining said sealing means to said tube.
17.  The device of claim 1, wherein said cover comprises a relatively rigid portion to which said releasable mounting means is joined, a relatively flexible portion and an opening in said flexible portion adapted to receive a tube therethrough.
18.  The device of claim 17, wherein said relatively rigid portion has a substantially annular configuration with a central aperture.
19.  The device of claim 18, wherein said flexible portion is situated in said central aperture.
20.  The device of claim 1, wherein said body member is substantially circular.
21.  The device of claim 1, wherein said body member is substantially oval.
22.  The device of claim 2, wherein said expandable means for mounting said body member to said adhesive member comprises a substantially flexible sheet mounted to said one end of said body member, said sheet being joined to said adhesive
The present invention relates to wound irrigation and/or drainage devices and, more particularly, to a wound irrigation and/or drainage device which utilizes a self-supporting collar to
protect the wound from contact, flexible mounting means which permits the adhesive-backed member to more readily accommodate the contours of the body, and a novel cover member designed to permit insertion of a catheter into the wound.
It is preferable in the treatment of certain types of wounds, particularly postoperative wounds, and certain skin disorders such as ulcers, burns, sores, and the like, to irrigate the affected region with fluid, such as antiseptic liquid or
hyperbaric oxygen.  In addition, certain types of wounds require periodic drainage.  Various types of devices have been proposed for these applications.  Certain of these devices are designed to be mounted to the patient&#39;s body, surrounding the afflicted
region, for an extended period of time to permit periodic irrigation and/or drainage.  It is often necessary that the wound be visible for purposes of observation and, accordingly, devices of this type are normally provided with a transparent portion
which permits observation of the affected region.
One device of this type which is commercially available is described in British Patent Specification No. 1,549,756, entitled &quot;A Wound Irrigating Device.&quot; That device includes a rectangular, transparent, flexible plastic cover mounted on a rim
with an adhesive back.  The rim is situated on the skin of the patient surrounding the wound such that the wound is aligned with the hollow chamber defined by the cover.  An entry port and an exit port are provided for irrigating fluid.  A conventional
D.U.  infusion set may be connected to the entry port, to permit a fluid such as hydrogen peroxide to be flushed through the device.  The plastic cover may be transversely ribbed to increase the flexibility of the device in the longitudinal direction.
While the cover, and particularly the transversely ribbed version thereof, is designed to flex relatively easily in the longitudinal direction, flexing in the transverse direction will cause the cover to collapse.  Also, this device can normally
be used only on relatively flat areas of the body as it does not easily conform to curved body contours.  Moreover, since the device is elongated in the longitudinal direction, it is suitable for use only with wounds which are similarly shaped.  Thus,
the instances in which this device can be utilized effectively are limited.
A commercially available drainage device is described in British Patent Application No. 2,099,308 which eliminates some of the above disadvantages.  This device is formed of highly flexible liquid impermeable sheets of material and includes a
rather large circular opening which is adapted to align with the wound.  The flexibility of this device permits it to be used on areas of the body with curved contours.  The large circular opening permits the device to be used with wounds of a variety of
The device includes a flexible pouch with top and bottom walls and pleated side walls which permit the pouch to expand.  The top wall includes an access opening having a flanged locking ring of flexible plastic extending thereabout.  A removable
closure cap is attached to the access opening and has a rim with circumferential locking ribs to seal the cap on the flanged locking ring of the pouch.  The pouch is elongated and has a drainage port at one end.  A portion of the underside of the pouch
is coated with a layer of surgical hypoallergenic pressure-sensitive adhesive to permit mounting of the device to the skin.
The major problem with the device disclosed in British Patent Application No. 2,099,308 is that the flexibility of the pouch permits the upper surface thereof, and particularly the undersurface of the closure cap, to be in contact with the wound. Such contact is normally contra-indicated, particularly immediately after surgery.  Accordingly, this product also has limited usefulness.
It is, therefore, a prime object of the present invention to provide a wound irrigation and/or drainage device which prevents contact with the wound and, at the same time, is flexible enough to conform to the contours of the patient&#39;s body.
In accordance with the present invention, a wound irrigation and/or drainage device is provided.  The device comprises a flexible adhesive-backed member having an aperture adapted to align with the wound when the device is mounted on the wearer.
A substantially hollow body member is provided having first and second open ends.  Means are provided for mounting one of the ends of the body member to the adhesive member, in alignment with the aperture.  A cover member is provided.  Means are provided
for releasably mounting the cover member to the other end of the body member to form a substantially fluid-tight chamber in communication with the aperture.  At least one fluid port is provided in the chamber.  The body member comprises self-supporting
means to prevent contact with the wound.
The self-support means comprises a substantially cylindrical rigid or semi-rigid element, preferably in the form of an upstanding wall.  The port may be situated in the wall.
The means for mounting the body member to the adhesive member comprises a substantially flexible sheet mounted to the end of the body member.  The sheet is joined to the adhesive member so as to surround the aperture.  Preferably, the sheet is
joined to the adhesive member at a point spaced from the aperture.  The port may be situated in the flexible sheet.
Preferably, the sheet comprises expandable means and is mounted to the periphery of the element.  The expandable means comprises an accordion-like fold which extends outwardly of the periphery of the element and, thereafter, extends inwardly to
the adhesive member.
The cover member preferably has a transparent portion.  Alternatively, the cover member may have a surface with an opening adapted to receive a tube therethrough.  In this embodiment, the cover member comprises means for sealing the surface to
the tube.  In addition, means may be provided for joining the sealing means to the tube.  Such means may take the form of an adhesive tape or the like.
The cover member comprises a relatively rigid portion to which the releasable mounting means is mounted, a relatively flexible portion and an opening in the flexible portion adapted to receive the tube.  Preferably, the relatively rigid portion
has a substantially annular configuration with a relatively large central aperture.  The flexible portion is situated within the central aperture.
In one embodiment, the support means is substantially circular.  In another embodiment, the support means is substantially oval.
To these and to such other objects which may hereinafter appear, the present invention relates to a wound
irrigation and/or drainage device, as set forth in the following specification and recited in the annexed claims, taken together with the accompanying drawings, wherein like numerals refer to like parts, and in which:
As illustrated in FIGS. 1-4 and 8, the wound irrigating and/or drainage device of the present invention comprises an adhesive-backed label,
generally designated A, designed to be affixed to the skin of the patient in the afflicted region.  Mounted to the upper surface of adhesive-backed label A is a cylindrical hollow collar, generally designated B, composed of rigid or semi-rigid material,
preferably plastic.  Collar B has a lower open end which faces label A and an upper open end upon which a cover member, generally designated C, is releasably mounted.  The lower open end of collar B is mounted to label A by flexible mounting means,
generally designated D.
Preferably, collar B is formed by molding rigid or semi-rigid plastic material and includes an integral inlet port 10 and outlet port 12.  Tubes (not shown) can then be connected to these ports to permit the introduction of fluid into the
interior of collar B and the removal of fluid from the interior of collar B, so as to irrigate the wound.  If the device is being employed only to drain a wound, then ports 10 and 12 would be sealed by fluid-tight plugs (not shown).  In addition, a
drainage tube 20 is preferably welded into position in flexible mounting means D to permit drainage of fluid from the wound.
Label A, as shown in FIGS. 1-4, comprises a base 22 composed of a thin film of polymeric material such as polyethylene or a breathable non-woven material such as a spun-bonded polyester and a medical grade adhesive layer 24 on the undersurface of
base 22.  Adhesive layer 24 consists of materials known to be suitable for use on the human body.  Preferably, layer 24 is formed as a homogeneous blend of one or more pressure-sensitive viscous materials such as polyisobutylene having intermittently
dispersed therein one or more water-soluble or swellable hydrocolloid gums and may also include one or more thermoplastic elastomers and/or one or more water swellable cohesive strengthening agents, as described by Chen in U.S.  Pat.  No. 3,339,546 and
Chen et al. in U.S.  Pat.  No. 4,192,785.  For increased comfort, adhesive layer 24 can be formulated so as to be microporous as described in European Patent Application No. 82.301925.2, and entitled &quot;Microporous Adhesive Tape.&quot; A microporous acrylic
adhesive such as that taught by Copeland in U.S.  Pat.  No. 3,121,021 can also be employed as adhesive layer 24.  Also, label A may include a layer of foam between base 22 and adhesive layer 24, as taught by Chen in U.S.  Pat.  No. 3,972,328.
Label A&#39;, as shown in FIG. 8, comprises medical grade adhesive layer 24 formed as described above and adhesive layer 29 which bonds flexible mounting means D to layer 24.  Adhesive layer 29 need not be of medical grade and can be a conventional
acrylic type adhesive.
Adhesive-backed labels A and A&#39; are provided with a precut central aperture 26 of relatively small dimension.  As is well known in the art of ostomy devices, the labels are designed such that aperture 26 may be enlarged by the physician or nurse,
to the shape of the wound, prior to application of the adhesive-backed label to the skin of the patient.  In the case of label A, aperture 26 can be enlarged up to the ring weld 28 which joins base 22 of adhesive label A to flexible mounting means D. In
the case of label A&#39;, aperture 26 can be enlarged almost to the edge of adhesive layers 29 and 24.  Accordingly, the structure of the present invention permits a rather large aperture to be formed in the labels, permitting the device to accommodate even
relatively large, irregularly shaped wounds, not possible in the prior art devices.
Collar B is preferably made of rigid or semi-rigid plastic material.  The walls of collar B must have sufficient strength such that collar B can withstand any external force which the patient is likely to encounter without collapsing.  Thus, the
thickness of the walls of collar B and the strength of the material of which it is composed must be selected such that the collar is entirely self-supporting even when external forces are exerted thereto.
Extending outwardly from the lower edge of collar B is a flange 30.  The undersurface of flange 30 is joined to the upper surface of flexible mounting means D by any conventional method, such as by welding or by adhesive, so as to form a
The upper portion of collar B has an outwardly extending flange 32 similar to flange 30.  Joined to the upper surface of flange 32, by any conventional method such as adhesive or the like, is a ring-like male interengaging part 34.  Interengaging
part 34 is situated to releasably engage a ring-like female interengaging part 36 which forms the lower rim of cover member C. Interengaging parts 34 and 36 are of conventional design and are constructed to form a fluid-tight seal.  The male and female
interengaging parts may be interchanged such that the female interengaging part is mounted on collar B and the male interengaging part is mounted on cover member C, if desired.
As is best illustrated in FIG. 3, adhesive-backed label A is often affixed to the patient&#39;s body in a region which is not planar, that is, may be curved or rounded.  While the base 22 of the label A is itself quite flexible, if the label A were
affixed directly to collar B, the flexibility of label A, and therefore its ability to conform to the contours of the body, would be severely limited because of the rigidity of collar B. Accordingly, collar B is mounted to label A by flexible mounting
means D such that collar B does not reduce the flexibility of label A and, thus, its ability to conform to the contours of the body.
Mounting means D is composed of a thin, flexible, fluid-impervious sheet which has an upper section 38 affixed to the lower surface of flange 30 by any conventional means such as by welding or by adhesive, to form a fluid-tight seal.  The lower
section 40 of means D is affixed to the upper adhesive surface 29 of label A&#39; or to the upper surface of base 22 of label A by means of ring weld 28.  Between sections 38 and 40 of means D is an expandable section 42 which has an accordion-like fold
therein.  Section 42 may expand as illustrated in FIG. 3, to permit label A to be flexed in accordance with the contours of the body.  When collapsed, as seen in FIG. 2, section 42 of means D extends outwardly of the periphery of collar B and inwardly
towards label A. Drain tube 20 is welded into section 42 of means D such that if the patient is lying down, fluid from the wound will collect at the lowest portion of means D and be removed therefrom through drain tube 20.
Cover member C is normally provided with a transparent window portion 42 to permit observation of the wound.  Cover member C may be removed from collar B to permit access to the wound without removing the adhesive-backed label A from the skin of
As illustrated in FIG. 4, the first preferred embodiment of the present invention includes a collar B which is circular in configuration.  In spite of the fact that the present invention permits the enlargement of aperture 26 in label A to a
relatively large extent, there are certain cases where a wound, particularly the result of surgery, is so elongated that aperture 26 cannot be enlarged enough to accommodate same.  In those instances, the second preferred embodiment of the present
invention, as illustrated in FIG. 5, may be utilized.  As seen in FIG. 5, collar B&#39; and its various parts, as well as aperture 26&#39; in label A&#39;, are each provided with a substantially oval shape designed to accommodate extremely elongated wounds.  All
other parts of the second preferred embodiment shown in FIG. 5 are functionally and structurally the same as those described above.
FIGS. 6 and 7 illustrate an alternative cover member C&#39; which may be utilized with the device of the present invention.  Cover member C&#39; is designed for use in those instances in which a drainage tube or catheter must be inserted directly into
In cover member C&#39;, transparent portion 42 is replaced by an outer annular section 44 of relatively rigid plastic, either opaque or transparent, with a relatively large central opening 46.  Affixed to the upper surface of section 44, adjacent
opening 46, is a circular member 48 composed of flexible plastic or the like.  Member 48 has a central opening 50 therein.  The diameter of central opening 50 in member 48 is smaller than the outer diameter of the catheter tube 52.  Because of the
flexibility of member 48 and the size of aperture 50 therein, when catheter tube 52 is inserted into aperture 50 from the bottom of cover member C&#39;, the walls of member 48 will be directed upwardly and tightly against the exterior of the catheter tube
52.  In order to seal member 48 to the exterior of catheter tube 52, a strip of adhesive tape 54 or the like may be used to insure that a fluid-tight seal is obtained and, in addition, to prevent catheter tube 52 from being accidentally pulled from the
It will now be appreciated that the present invention relates to a wound irrigation and/or drainage device which is both rigid enough to prevent contact with the wound, even if external forces such as the weight of a blanket or the like are
exerted thereon and, at the same time, is flexible enough to be worn comfortably and to conform to the contours of the patient&#39;s body.  These objects are achieved by utilizing a rigid or semi-rigid collar member which is entirely self-supporting and
which will resist collapsing due to external forces.  The flexibility of the adhesive-backed label is not restricted by the rigidity of the collar due to the flexible means which are utilized to mount the collar on the label.  Moreover, the structure of
the present invention permits same to be utilized with rather large wounds because the label aperture can be enlarged to a relatively large extent.  A second preferred embodiment of the invention is provided particularly for use with elongated wounds.
The present invention can also be utilized with a specially designed cover member which permits a catheter tube to be inserted directly into the wound.  This specially designed cover member comprises an extremely flexible member which permits the
insertion of the tube therethrough and will tightly adhere to the exterior surface of the tube.  Further, the member may be affixed to the tube in a manner which permits a fluid-tight seal to be formed and which prevents the accidental retraction of the
While only a limited number of preferred embodiments of the present invention have been disclosed herein for purposes of illustration, it is obvious that many modifications and variations could be made thereto.  It is intended to cover all of
these variations and modifications which fall within the scope of the present invention, as defined by the following claims:
"Wound Irrigation And/or Drainage Device - Patent 4778446"
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