STOMAL STOP

Abstract: Stomal stop provided with a support which is substantially circular in cross-section and whose oppositely situated ends are open, which support carries a bag open at one end and comprises means of attachment for securing the stomal stop in position in a skin cavity of the stomal stop user, and which support surrounds the bag at least in part.

Description: The invention relates to a stomal stop provided with a support that is substantially circular in cross-section and whose oppositely situated ends are open, which support carries a bag open at one end. Such a stomal stop is known from US patent No. 4,067,335. this known stomal stop comprises an annular support which is inserted into, for example, the anal canal of a patient. A folded or rolled-up bag closed at one end communicates with the support for the reception of faeces and/or urine. The excrements' passage into the bag causes the latter to be unrolled or unfolded. The part of the bag which contains the faeces and/or urine can be sealed and released, so that the remaining part of the bag still attached to the support is available for the reception of further waste matter from the patient's body. One drawback of the known stomal stop is that it is of a rather complicated design and therefore expensive. This is a grave disadvantage, considering that a user of stomal stops requires at least on stomal stop a day. A further drawback of the known stomal stop is that it does not afford a proper sealing of the patient's anus. In addition, it has been found in actual practice that the bag of the known stomal stop is liable to be detached from its holding ring. And finally, the lack of compactness renders the known stomal stop rather unwieldy in use. It is an object of the present invention to provide a simple, compact stomal stop which achieves a proper sealing of, for example the user's anus and in which the bag cannot get detached unintentionally from the support. To this end, a stomal stop of the type mentioned in the introductory paragraph is according to the invention characterized in that the support surrounds the bag at least in part and that the support comprises means of attachment for securing the stomal stop in position in a skin cavity of the stomal stop user, which means of attachment contain a material which may expand through the action of heat, fluid and/or pressure, which material has been disposed at least partly round the support and/or is at least partly identical with the material from which the support has been made. Because of this design, the bag is not liable to be unintentionally detached or torn or otherwise disabled. This arrangement ensures a firm positioning of the stomal stop in, for example, a patient's natural or artificial anus. One embodiment of a stomal stop according to the invention is characterized in that the means of attachment comprise a fluid-absorbing material which has been disposed at least partly round the support and which may expand through absorption. A further embodiment of a stomal stop according to the invention is characterized in that before use of the stomal stop the support is at least partly enveloped in a sleeve and that the means of attachment contain a material which may expand upon removal of the sleeve, which material has been disposed at least partly round the support and/or is at least partly identical with the material from which the support has been made, whilst the said sleeve envelops the expandable material before the stomal stop is put into use. The expandable material may, for instance, be made of a polymeric substance. A further embodiment of a stomal stop according to the invention is characterized in that the means of attachment comprise a helical spring disposed in the wall of the support, or alternatively either on the inner or on the outer wall of the support, which helical spring is tensioned before and slack after the insertion of the stomal stop into a body cavity of a stomal stop user, whilst the diameter of the helical spring is smaller when tensioned than when slack. If such a helical spring is designed so as to be hollow, gas can be passed through the cavity within the spring. A further embodiment of a stomal stop according to the invention is characterized in that the support is surrounded at least partly by spongelike material having closed or open cells. If the spongy material contains open cells, gas can ge passed through. However, spongy material containing closed cells can readily absorb fluid. Yet another embodiment of a stomal stop according to the invention is characterized in that the support has a conical shape and that the opening of the bag is provided with a locking ring having a larger diameter than the diameter of that end of the support which faces away from the skin cavity of a patient during use of the stomal stop, whereby during use of the stomal stop the locking ring prevents the bag from leaving the support through the said end. The invention will now be elucidated with reference to the accompanying drawings, in which figures 1,2, 3 and 4 represent embodiments of the stomal stop according to the invention; and figure 5 depicts a strip of adhesive material with the aid of which the stomal stops of figures 1,2, and 3 can be stuck onto the skin of a patient with a stoma. Figure 1 shows stomal stop 1 which is formed by a cylindrical support 2. At one of its ends this support 2 carries a number of resilient reeds 3. The support 2 may have been made, for example, from a flexible material. To enhance the flexibility still further, if required, the casing of the support 2 may be provided with longitudinal indentations (not shown). The support 2 is enveloped in a fluid-absorbing material 4, for example cottonwool. A bag 5 serving for the reception of faeces and/or urine is accommodated within the support 2. To permit insertion of the stomal stop 1 into the anus of a stomal stop user, the reeds 3 may be radially deflected inwards. The stomal stop 1 may, for instance, be used for an artificial, whether or not temporary, opening. Figure 2 depicts a stomal stop similar to that of figure 1. Like parts are indicated by like reference numerals. Here the reeds 3 are radially deflected outwards. This is the position which the reeds occupy, whether or not automatically, when once the stomal stop 1 has been inserted into, for example, an anus. Figure 3 represents a stomal stop 1 in which the support 2 has the shape of a ring. It again comprises reeds 3, fluid-absorbing material 4 and a bag 5. In the stomal stops 1 of figures 1-4 the support 2 may, if required, include an air filter. Such an air filter may take the form of capillary ducts. Figure 4 shows a cylindrical support 2 on whose outer wall a hollow helical spring 9 has been disposed. The support 2 thus provided with a helical spring 9 is enveloped in a cottonwool-like material 10 which may expand under the action of heat, for instance. The whole is surrounded by a cylindrical sleeve 11 which subjects the whole to a certain pre-compression. As soon as the stomal stop has been inserted into a skin cavity of a stomal stop user, the sleeve 11 is removed. As a result, the helical spring 9 will become slack - and thereby increase in diameter - which leads to a firm positioning of the stomal stop in the skin cavity. Under the influence of body heat of the stomal stop user, the cottonwool-like material 10 expands whereby the appliance is secured in position even better. Body gases of the stomal stop user can escape to atmosphere through the cavity of the helical spring 9. It will be obvious that the cottonwool-like material 10 and the helical spring 9 may be used either together or separately. Figure 5 depicts a strip of adhesive material 6 which has been stuck onto the skin 7 of stomal stop user. The strip 6 has an opening 8 through which a stomal stop according to any one of figures 1-4 is to be inserted. A body-friendly skin spray may be applied in conjunction with the strip of adhesive material. Such a skin spray, which may contain urea derivatives, for example, is to be applied to the inner wall of a skin cavity of the stomal stop user so as to ensure that the inner wall is permeable to air but not to a fluids. It is to be noted that the bag 5 is normally accommodated within the support 2 before use of the stomal stops represented in figures 1-4. When the stomal stops are in use, the bag 5 will gradually be filled and in consequence thereof emerge partly from the support with its closed end. If required, a locking ring is provided to prevent the bag 5 from emerging prematurely.

Claims: A stomal stop (1) provided with a support (2) which is substantially circular in cross-section and whose oppositely situated ends are open, which support (2) carries a bag (5) open at one end, characterized in that the support (2) surrounds the bag (5) at least in part and that the support (2) comprises means of attachment (4,10) for securing the stomal stop (1) in position in a skin cavity of the stomal stop user, which means of attachment (4,10) contain a material which may expand through the action of heat, fluid and/or pressure, which material has been disposed at least partly round the support (2) and/or is at least partly identical with the material from which the support (2) has been made. A stomal stop (1) according to claim 1, characterized in that the means of attachment (4,10) comprise a fluid-absorbing material which has been disposed at least partly round the support (2) and which may expand through absorption. A stomal stop (1) according to any one of the claims 1-2, characterized in that before use of the stomal stop the support (2) is enveloped at least partly in a sleeve (11) and that the means of attachment (4,10) contain a material which may expand upon removal of the sleeve (11), which material has been disposed at least partly round the support (2) and/or is at least partly identical with the material from which the support (2) has been made, whilst the said sleeve (11) envelops the expandable material before the stomal stop (1) is put into use. A stomal stop (1) according to any one of the preceding claims, characterized in that the means of attachment (4,10) comprise a helical spring (9) disposed in the wall of the support (2), which helical spring (9) is tensioned before and slack after the insertion of the stomal stop (1) into a body cavity of a stomal stop user, whilst the diameter of the helical spring (9) is smaller when tensioned than when slack. A stomal stop (1) according to claim 4, characterized in that the means of attachment (4,10) comprise a helical spring (9) disposed on the inner or the outer wall of the support (2), which helical spring (9) is tensioned before and slack after the insertion of the stomal stop (1) into a body cavity of a stomal stop user, whilst the diameter of the helical spring (9) is smaller when tensioned than when slack. A stomal stop (1) according to claim 4 or 5, characterized in that the helical spring (9) is hollow. A stomal stop (1) according to any one of the preceding claims, characterized in that the support (2) is surrounded at least partly by spongelike material having open or closed cells. A stomal stop (1) according to any one of the preceding claims, characterized in that the support (2) has a conical shape and that the opening of the bag (5) is provided with a locking ring having a larger diameter than the diameter of that end of the support (2) which faces away from the skin cavity of a patient using the stomal stop (1), whereby during use of the stomal stop (1) the locking ring prevents the bag (5) from leaving the support (2) through the said end. A stomal stop (1) according to any one of the preceding claims, characterized in that the support (2) has been made from a flexible material. A stomal stop (1) according to any one of the preceding claims, characterized in that the support (2) has a substantially cylindrical shape. A stomal stop (1) according to any one of the preceding claims 1-9, characterized in that the support (2) has substantially the shape of a ring. A stomal stop (1) according to claim 10 or 11, characterized in that at least one indentation has been made in at least part of the surface of the support (2). A stomal stop (1) according to any one of the preceding claims, characterized in that the support (2) includes an air filter. A stomal stop (1) according to any one of the preceding claims, characterized in that in the operating condition of the stomal stop (1) the support (2) has been passed through a strip (6) of adhesive material by means of which the support has been stuck onto the skin (7) of a stomal stop user. A stomal stop (1) according to any one of the preceding claims, characterized in that, in order to facilitate the insertion of the stomal stop (1) into a skin cavity of a stomal stop user, a film has been applied round about the stomal stop (1), which film can be removed after the insertion. A stomal stop (1) according to any one of the preceding claims, characterized in that an inflatable pouch has been applied round about the support (2) for adaptation of the stomal stop (1) to the size of a skin cavity of a stomal stop user.

Inventors: KOK, CORNELIS JACOBUS MARIA
Applicants: OPTICAL DISC MANUFACTURING EQUIPMENT B.V.
Application year: 1988
Main classification: A61F2
IPC codes: A61F5, A61F2