Bandage Containing Attachment Post

1. Field of the Invention

This invention relates to bandages, and more particularly, to a bandage which can be assembled just prior to use and which can dispense a medicament if desired.

2. Description of the Prior Art

Bandages are in general of course well known in the art. However, bandages in the past have been of basically unitary construction and have been intended more for protective rather than therapeutic uses.

It is an object of this invention to provide a bandage of simple construction.

It is a further object of this invention to provide a bandage which can be used for administering therapeutic doses of a medicament.

It is a still further object to provide a bandage which can be assembled by the patient prior to use.

It is a still further object to provide a bandage which is easily and economically fabricated.

The above objects and others are obtained by providing a bandage composed of readily assembled pieces. The first piece is made up of a lower portion, a base plate attached to the lower portion, and a post extending from the surface of the base plate. The second piece of the bandage is a matrix, which is attached to the first piece by means of a hole in the matrix which fits around the post of the first piece. For the purposes of this invention, a matrix is defined as a material that will contact the skin of a patient for healing or other therapeutic purposes. Thus a matrix is intended to refer to both a conventional bandage pad and an assembly that contains a medicament.

To facilitate attachment of the bandage to a patient, the lower portion can be adhesively coated. In another embodiment, the lower portion can be in the form of a strap having suitable fastening means at its ends. The base plate can be composed of any suitable barrier material, some examples of which are metal foil of "polyfoil" (a laminate of plastic and a metal foil). The matrix can be composed of a material containing a therapeutic dosage of a medicament and which allows sustained release of the medicament.

FIG. 1 is a perspective view of two bandages of the present invention having different shapes and sizes;

FIG. 2 is a sectional side view of the bandage taken along line 2--2 of FIG. 1;

FIG. 3 is an enlarged sectional side view of the bandage taken along line 3--3 of FIG. 2, showing the assembly of the bandage in detail;

FIG. 4 is a sectional side view of another embodiment of the base plate and matrix;

FIG. 5 is a perspective view of another configuration of the matrix;

FIGS. 6 through 8 show alternative constructions of the post; and

FIG. 9 is a top view of an alternative embodiment of the bandage wherein the lower portion is in the form of a strap.

Referring to FIGS. 1 through 3, the bandage 10 is generally composed of a lower portion 12, a base plate 14 from which post 22 extends, and matrix 16. The matrix 16 is secured to the rest of the bandage by means of hole 21 which extends through the matrix and fits around post 22. The hole 21 can be, but is not necessarily, defined by eyelet 20. The post can be attached to the base plate by means of a rivet 24 extending through the lower portion and base plate as shown in FIG. 3. The rivet can also extend through the base plate alone (not shown). Other forms of attachment, such as adhesive attachment, are also readily useable as a means for attachment.

The lower portion 12 is composed of a backing (or first) layer 15 and an adhesive layer 13 applied to the upper surface of the backing layer. A release liner 18 may be utilized to prevent unwanted adhesion prior to use.

The base plate 14 can be composed of any suitable barrier material, such as metal foil or metal foil-polymer laminates ("polyfoils"). Other possible base plate combinations include, but are not limited to, aluminum foil-polyester, Surlyn-polypropylene, polyamide-aluminum foil-polyvinyl chloride ("Alusuisse"), polyethylene-polyester, and bilaminate foil CX-220 manufactured by the Ludlow Packaging division of Ludlow Corporation, Holyoke, Mass. 01040. In the preferred embodiment shown in FIG. 4, the base plate is composed of a polyethylene layer 34, an aluminum foil layer 36, and a polyester layer 38. The "Alusuisse" embodiment specifically consists of an 18 micron thick layer of polyamide, a 40 micron thick layer of aluminum foil, and a 60 micron thick layer of polyvinylchloride.

The matrix 16 can be composed of any suitable bandage material such as a cotton batt or a synthetic bandage material, e.g. a polyester like polyethylene terephthalate. The matrix can also have several layers such as an aluminum foil layer and a polyester layer, or as shown in FIG. 4, a layer of polyethylene 32, an aluminum foil layer 30, a layer of polyethylene 28, and a polyester layer 26.

The matrix can also be further composed of a medicament containing-dispensing layer. An example of this type of matrix is disclosed in U.S. pat application Ser. 109,242 to Keith et al, entitled "Polymeric Diffusion Matrix", filed Jan. 3, 1980, incorporated by reference herewith. That application discloses a polymeric diffusion matrix composed of glycerol, a polyvinyl alcohol, and a water soluble polymer with hydration sites, e.g. polyvinyl pyrrolidone. This matrix provides sustained release of a medicament which is introduced to the matrix during manufacture of the matrix. An example of a medicament which can be dispensed from such a matrix is trinitroglycerol, which is used as a vasodilator for treating heart conditions.

The hole 21 should be of such a size as to fit snugly around the post 22, the post 22 preferably being constructed so that at some point, the body of the post is wider than at a point immediately closer the base of the post. This structure provides a more secure holding of the matrix. The length of the post should also be less than the thickness of the matrix to prevent possible injury to the patient.

FIG. 5 shows a matrix of a variable size, wherein the size of the matrix can be increased by adding concentric rings 40, 42 and 44 to central matrix 46 containing hole 21, or decreased by removing concentric rings 40, 42, and 44.

FIGS. 6, 7 and 8 show various configurations for the post. FIG. 6 also shows a configuration for rivet 24. If a hollow post and rivet are provided, the post attachment bandage can be used as an I.V. tube supporter, with the I.V. tube extending through the rivet and post and then into the patient.

FIG. 9 shows a second embodiment for the bandage. In this embodiment, the lower portion 12 is in the form of a strap. The bandage is shown without the matrix attached. The strap is provided with fasteners 48 on each end of the strap. One suitable fastener is a flexible fabric fastener of an interconnectible series of loops and hooks, the fastener being located on opposite faces of the strap. This fastener is commonly known as a "Velcro" fastener in the trade. Other suitable fasteners such as snaps or adhesives are also readily conceived.

The bandage can be packaged by having the combination of the lower portion, baseplate and post enclosed in one package and the matrix in another package. When the patient desires to use the bandage, he can open the two packages and attach the matrix to the post. This is advantageous if different types of packaging are desirable for the matrix and lower portion.