WO1983002890A1

WO1983002890A1 - Collection bag for gases, liquids and/or solid materials

Info

Publication number: WO1983002890A1
Application number: PCT/SE1983/000050
Authority: WO
Inventors: Matts Ingvar Ramstorp
Original assignee: Matts Ingvar Ramstorp
Priority date: 1982-02-17
Filing date: 1983-02-16
Publication date: 1983-09-01
Also published as: SE426139B; EP0126727A1

Abstract

Collection bag for gases, liquids and/or solid materials designed with a vent for gas release. The vent has a filter (2) for purification of the gases. This filter (2) is protected from contact with liquid and solid materials by a gas permeable, liquid impermeable membrane (4). The collection bag is particularly suited for use in connection with colostomy or ileostomy.

Description

TITEL

Collection bag for gases , l iquids and/or sol i d material s.

SUMMARY The patent described a col lection bag for gases, l iquids and/ or solid materials desi gned with a went with a filter for gas release. The fil ter is protected from contact with the even tual liquids or sol id materials by a gas permeable, l iquid impermeable membrane. The collection bag is particularly suited for use in connection with colostomy or il eostomy.

TECHNICAL AREA

This invention describes a col l ection bag for gases , l iquids and/or sol id materials which has a went for gas rel ease in con- nection with a fil ter where the fil ter is protected from con tact with any eventual l iquids or sol id materials by a gas permeable, l iquid impermeable membrane which also divides the bag into two compartments in which the first is constructed with an inlet for the collected material as wel l as an outl et for the same material , and a second compartment which is, or can be put, into contact with the external enviroment via the filter.

A bag of this type can be used for many different purposes. However, the invention is primarily intended for aise with ostomy patients, i.e. patients with colostomy, in which the large intestine is cut and protrudes through the abdomi nal wall , or with ileostomy, in which a similar surgical operation is performed with the small intestine. In the l atter case the patients often have difficult probl ems with fl uid, stinking and gas. producing excrement.

TECHNICAL FOUNDATIONS

Examples of the technique s general foundations are given in US patents 3.302.647 and 3.612.053 as wel l as in Swedish patents 393.527 , 403.699 and 405.934 which al l describe ostomy bags in general. In addition, special reference is made to Swedish patents 399.818 and 399.819, which describe a ventilation system with a coal filter for use with ostomy bags. As a consequence of this vent and filter, gases are released and deodorized. However, the capacity of these devices are relatively low and can further be diminished if liquid or solid material comes into contact with the ventilation system, in addition, refernce is made to the German patent application DEA1 27 30 286 as well as to the Swedish patent application 8006502-2.

DESCRIPTION OF THE INVENTION

The invention herein consists of a collection bag of the type mentioned above with a ventilation system with a large degassing capacity and simultaneously with little risk for clogging of the ventilation system. The collection bag, according. to the invention s characteristics, consists of three layers of essentially equal size and shape of which the two outer layers are made of gas and liquid impermeable material while the middle layer consist of a gas permeable, liquid impermeable membrane. A secure fixation of the membrane is made if both of i:he outer layers extend somewhat beyond the edge of the intermediate layer and are melted together as well as with the intermediate layer.

The filter, preferably of disc shape with one or more holes, has its inner side in contact, or can be put into contact, with the collection bags interior. The other.{outer) side of the filter is covered by a gas impermeable layer, thus forcing the gas to leave the hole(s) radially through the filter material.

The filter does not necessarily have to be attached to the collection bag before hand, but can be packed separately for later attachment. Ideally, the collection bag is designed with a mark which shows the position where such a separate filter should be attached. The mark can, for example, be a raised ridge which essentially the same form as the filter and encompas ses the hole(s) in the collection bag s outer layer. There by, attachment is simplified and the risk of filter loss is minimized.

SHORT DESCRIPTION OF THE FIGURES

The invention is described in more detail below with refer rence to the included figures which shows the preferred employment form of the collection bag when intended for use as a so called ostomy bag.

Figure 1 shows the collection bag from the side that is to be turned away from the patient s body.

Figure 2 shows the same collection bag from the side that is intended to be turned towards the body.

Finally, figure 3 shows schematically the different material layers separated from each other which makes up the collection bag.

THE PREFERRED EMPLOYMENT FROM OF THE INVENTION Figure 3 shows an example of the collection bag, beginning from the outside, consisting of a barrier layer (1), a filter (2), an outer layer (3), a membrane layer (4), an inner layer (5), a layer for attachment of the collection bag to the body (6), a double-sided sealing layer. (7) and a protective layer (8).

The outer barrier layer (1) can consist of adhesive paper or similar material which should block the coal filler s openings (2a) so that the gases are forced to leave the openings sideways through the filter. If the filter is prepacked or del ivered separately, it can itself be coated on both sides with an adhesive and covered with a barrier layer (1 ) on one side and a similar, not shown, protective layer on the other side. The protective layer can, for example, consist of sil icone coated paper.

The collection bag's outer l ayer (3) is al so provided with corresponing openings (3a) surrounded by a raised ridge which is intended to mark the position for the filter (2). The ridge also minimizes the risk that the filter shoul d come lose by mistake.

The outer l ayer (3) as well as the inner l ayer (5) are made from a suitable plastic material such as PVC or PVCD, the l atter being more gas impermeabl e, however, does rustl e somewhat more.

The membrane layer (4) is shown in the figures to have basically the same size as the outer layer (3) and the inner layer (5) respectively. However, nothing hinders that it is made somewhat smaller so that the layers (3. and 5) are melted together peripherally to the membrane layer (4) to achieve the best possibl e fixation. In principle the membrane (4) can be made smaller depending on its abil ity of lettins through gases. If it is made considerably small er than both layers 3. and 5 then the membrane layer (4) must be attached along its entire periphery to the outer l ayer (3) so that the collected liquids or eventual sol id materials can not possibly clog the openings (3a or 2a) in the outer layer (3) or the coal filter (2).

For the expert in the field, it is clear that many different gas permeable, hydrophobic (i .e. water repellent) materials can be chosen for the membrane layer (4) , for example, silicone teflon, polypropylene or polytetraflouro ethylene.

The bag's inner layer (5), i.e. the layer foreseen to be against the body of the patient, contains an opening (5a). The corresponding openings (6a and 7a) can be found even in layer 6 and 7. These openings are intended for introduction of the ostomy. Ideally, layers 5 and 6 are sealed together around the openings (5a and 6a) by a number of concentric washers. Thus, the hole (5a, 6a and 7a) can be widened by the patient ro adapt for the individual ostomy.

Layer 6 consists of the same material as layer 5, for example PVC or PVDC.

Layer 7 is made preferably of a tape coated on both sides, from which the protective layer (8) can easily be removed. The latter layer (8) can, for example be made of silicon coated paper.

Furthermore, the materials as well as the form of the collection bag can vary considerably. An example of this is the neck-like part (9) intended to mark one of the patient's reclosable disposable openings which normally are found on ilileostomy. collection bags and can be closed with a clamp or a similar device. With col ostomy collection bags this opening is usually not included. In addition, it is not necessary that the frontal layer (3) contains the holes (3a) from the beginning. These can later be made by the patient with, for example, a needle.

Claims

PATENT CLAIMS

1. A collection bag for gases, liquids and/or solid materrials containing a vent for gas release with a cleaning filter (2) where the filter (2) is protected from the mentioned liquids or eventual solid materials by a gas permeable, liquid repellent membrane (4) and by which the bag is devided into two compartments of which the first is provided with an inlet opening (5a) for the collected material as well as with an outlet opening (9) for the same material, while the other compartment is, or can be made to be, in contact with the external enviroment via the filter (2), is c h a r a cteri z e d by that it consist of three layers of basically equal size and shape (3, 4, 5), of which the two outer layers are made of gas and liquid impermable material while the central layer consists of a membrane (4).

2. A bag, according to claim 1, c h a r a c t e r i z e d by the fact that both the outer layers extend somewhat beyond the central layer and are melted together as well as with the central layer (4).

3. A bag, according to claim 1, c h a ra ct e r i z e d by a filter (2) of disc form and contains one or several holes (2a), which on its inside is in, or can be put into, contact «ith the bag's interior, and is covered on its outside by a gas barrier layer (1), which thus forces the gases to leave the holes (2a) through the filter material radially with respect to the holes (2a).

4. A bag, according to the claims above, c h a r a c t e ri z e d by a mark (3b) which shows how and where to posftion a separate filter (2).

5. A bag, according to claim 4, c h a r a c t e r i z e d by a mark (3b), which consists of a raised ridge, which has basically the same form as the filter (2) and which encircles one or more holes (3a) in the bag s outer layer (3).

6. A bag, according to claim 1, c h a r a c t e r i z e d by that the filter (2) is manufacturec as a separate unit intended for attachment to the bag first when put into use.