Patent Application
20150190244
1. Field of the Invention
The present invention relates to breast prostheses and, more specifically, to a breast prosthesis that includes a pocket into which material may be optionally placed.
2. Description of the Related Art
Many women who have had a mastectomy wear a breast prosthesis at the affected site. Typically, a breast prosthesis is made to look like a natural breast. It is placed against the patient's chest and is typically supported by a brassiere.
A common type of breast prosthesis is made from a soft silicone gel. Such a prosthesis includes an envelope made from a thin plastic film into which uncured silicone gel is injected. The pouch and the uncured silicone gel are then placed in a metallic mold having an interior that is complementary in shape to the desired shape of the prosthesis. The mould is then placed in an oven, where the silicone gel is heated until it is cured.
The silicone gel must be cured until it has a firmness so that it will maintain the shape of a natural breast during regular use. However, some users desire to adjust the character of the prosthesis, such as its shape, but are not able to do so.
Therefore, there is a need for a breast prosthesis that can be adjusted by the user.
The disadvantages of the prior art are overcome by the present invention which, in one aspect, is a breast prosthesis for external wearing by a user that includes a first layer that includes two films that are sealed together peripherally so as to define a front chamber. A second layer includes two films that are sealed together peripherally so as to define a back chamber. The second layer is disposed adjacent to the first layer so that they define a pocket therebetween. A portion of a peripheral edge of the second layer is sealed to a corresponding portion of a peripheral edge of the first layer so as to define a first opening so that the pocket defined between the first layer and the second layer opens to the first opening. The first opening and the pocket are configured to allow the user to stuff a material into the pocket through the first opening. A first silicone rubber is disposed in the front chamber and is cured in an outer shape of a breast. A second silicone rubber is disposed in the back chamber.
In another aspect, the invention is a method of making a breast prosthesis, in which a first film sheet, a second film sheet, a third film sheet and a fourth film sheet are placed together. A non-stick shape is placed between the second film and the third film. The non-stick shape includes at least one protrusion extending therefrom. The first film sheet, the second film sheet, the third film sheet and the fourth film sheet are welded along a peripheral weld that is made discontinuous by the at least one protrusion extending from the non-stick shape so as to form an envelope in which the first film sheet and the second film sheet define a first chamber therebetween that opens to a first sprue. Similarly, the third film sheet and the fourth film sheet define a second chamber therebetween that opens to a second sprue. The second film sheet and the third film sheet define a pocket therebetween that opens to at least one first opening resulting from the weld being made discontinuous by the at least one protrusion. The envelope is placed in a breast form mold having a cavity that is complementary in shape to the breast prosthesis. A first silicone gel into the first chamber through the first sprue. A second silicone gel is injected into the second chamber through the second sprue. The first silicone gel is cured so as to form a first silicone rubber and the second silicone gel is cured so as to form a second silicone rubber, thereby forming the breast prosthesis. The breast prosthesis is removed from the mold. The non-stick shape is removed from the pocket.
In yet another aspect, the first film sheet and a second film sheet are welded together along a first weld to form a first sub-envelope in which the first film sheet and the second film sheet define a first chamber therebetween that opens to a first sprue. Similarly, the third film sheet and the fourth film sheet are welded together along a second weld so as to form a second sub-envelope in which the third film sheet and the fourth film sheet define a second chamber therebetween that opens to a second sprue. The first sub-envelope and the second sub-envelope are placed together so that the first weld is aligned with the second weld and the non-stick shape place between the first envelope and the second envelope. The first sub-envelope and the second sub-envelope are welded along a peripheral weld so as to generate the envelope. The peripheral weld is made discontinuous by the at least one protrusion extending from the non-stick shape so as to define a pocket therebetween that opens to at least one first opening resulting from the peripheral weld being made discontinuous by the at least one protrusion. The envelope is placed in a breast form mold having a cavity that is complementary in shape to the breast prosthesis. The first silicone gel is injected into the first chamber through the first sprue and the second silicone gel is injected into the second chamber through the second sprue. The first silicone gel is cured so as to form a first silicone rubber and the second silicone gel is cured so as to form a second silicone rubber, thereby forming the breast prosthesis. The breast prosthesis is removed from the mold. The non-stick shape is removed from the pocket.
These and other aspects of the invention will become apparent from the following description of the preferred embodiments taken in conjunction with the following drawings. As would be obvious to one skilled in the art, many variations and modifications of the invention may be effected without departing from the spirit and scope of the novel concepts of the disclosure.
A preferred embodiment of the invention is now described in detail. Referring to the drawings, like numbers indicate like parts throughout the views. Unless otherwise specifically indicated in the disclosure that follows, the drawings are not necessarily drawn to scale. As used in the description herein and throughout the claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise: the meaning of “a,” “an,” and “the” includes plural reference, the meaning of “in” includes “in” and “on.”
U.S. Pat. Nos. 4,247,351 and 4,249,975 disclose prostheses of silicone gel encased in polyurethane film and, therefore, are incorporated herein by reference. U.S. Pat. Nos. 4,950,291, 5,895,423, 5,922,023 and 7,759,354 disclose multi-chambered breast prosthesis and methods of making the same and are also, therefore, incorporated herein by reference.
One embodiment of a breast prosthesis includes two layers of silicone gel enclosed in polyurethane film. The shape of the prosthesis conforms to the shape of a female breast. The layers of silicone are arranged such that a layer of soft conformable silicone is closest to the chest of the wearer and can conform to any irregularities in the chest. The outer layer of silicone positioned in the front of prosthesis (furthest away from the body) is firm enough to give the prosthesis a natural look and a symmetric appearance. A pocket is formed between the inner layer and the outer layer to allow the user to adjust the character of the prosthesis by placing additional material of the user's choosing in the pocket
As shown in
In one embodiment, a first polyurethane film 110, a second polyurethane film 112, a third polyurethane film 114 and a fourth polyurethane film 116 are welded together along the weld 126 to form three chambers. The welds 126 have the footprint of a breast form. The material of the exterior layer 120 is placed in a first of the three chambers. The material of the interior layer 124 is placed in a third of the three chambers. A pocket 132 is formed between the second polyurethane film 112 and the third polyurethane film 114, which opens to a plurality of openings 130. A material 134 may be optionally placed in the middle pocket 132 by the user to adjust the shape or the feel of the prosthesis 100. The material 134 could include, for example, a polyester fiberfill.
The material of the exterior layer 120 can include a silicone gel. In one embodiment, the silicone gel includes a two-component addition-cure silicone gel composition that includes a first combination, including a vinyl polymer, a silicone oil and a cross-linker, and a second combination, including a vinyl polymer, a silicone oil and a catalyst (such as a platinum and silicone complex). (One example of suitable silicon gels include prosthesis gels manufactured by Wacker Chemie GmbH.) A typical cross-linker includes a methyl hydrosiloxane polymer.
In one embodiment, gel of the interior layer 124 is uncured (or lightly cured) to facilitate it conforming to the shape of the user's chest when in use. In one embodiment, micro-spheres can be added to one or both of the silicone gels to reduce the weight of the resulting prosthesis 100. Similarly, pigments can be added to give the prosthesis a desired look, such as a natural flesh-tone look. The silicones can also have different degrees of softness.
As shown in
In one embodiment of a method of making a breast form, as shown in
The four sheets of polyurethane film 110, 112, 114 and 116 are welded together along a weld 126. The weld 126 is made discontinuous between layers 112 and 114 by the non-stick shape 140. This forms an envelope 118 that includes two different chambers with a pocked disposed between the chambers. The envelope 118 has a shape corresponding to a desired breast form. The breast form can be a-symmetric (as in the example shown in
In another embodiment, two sheets of polyurethane film 110 and 112 are stacked on top of each other and are welded together (the weld includes a sprue inlet 111) in a first weld. The non-stick shape 140 is placed on top of the welded two layers 110 and 112 and then two more sheets of polyurethane film 114 and 116 are stacked on top of the non-stick shape 140. A material can be added between film layers 112 and 114 to reduce the chance of the film layers sticking together. Examples of such a material can include talc, a similar fine powder or silicone oil. All four layers are then welded together in a second weld. The second weld essentially traces the first weld. In another embodiment, two sheets of polyurethane film 110 and 112 are welded to form a first sub-envelope and two more sheets of polyurethane film 114 and 116 are welded to form a second sub-envelope. The non-stick shape 140 is placed on top of the first sub-envelope and the second sub-envelope is placed on top of the non-stick shape 140 and the first sub-envelope. The first sub-envelope is then welded to the second sub-envelope along a peripheral weld so as to form a two chamber envelope.
Once in the mold 230, a first silicone gel 212 is injected into the first chamber through the first sprue 111 and a second silicone gel 216 is injected into the second chamber through the second sprue 117. This forms an uncured breast form 210, from which any air is removed. The sprues (111 and 117) are sealed and the mold 230 with the uncured breast form 210 therein is placed in an oven 240 and heated to a sufficient temperature for a sufficient amount of time to cure the first material 212 and the second material 216, thereby forming a cured breast form 220. The exact temperature and time depend on the specific mixture of silicone gel used; however, it can readily be determined from the manufacturer's data sheet. The cured breast form 220 is removed from the oven 240, is allowed to cool, removed from the mold 230, the non-stick shape 140 is removed from the breast form 220 and any excess film is trimmed away from the weld, resulting in a breast prosthesis 100.
The final prosthesis 100 includes a layer 124 closest to the patient that is soft and conforms to the chest of the wearer for comfort. The middle pocket 132 provides a place to add material to adjust the nature of the prosthesis 100. The front layer 120 maintains the exterior shape of the prosthesis 100 so as to give it an appearance of natural breast tissue.
As shown in
The above described embodiments, while including the preferred embodiment and the best mode of the invention known to the inventor at the time of filing, are given as illustrative examples only. It will be readily appreciated that many deviations may be made from the specific embodiments disclosed in this specification without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is to be determined by the claims below rather than being limited to the specifically described embodiments above.
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61/924,935, filed Jan. 8, 2014, the entirety of which is hereby incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61924935 | Jan 2014 | US |
