WO2011121127A1

WO2011121127A1 - Wound care article adapted to different through-flow speeds of the wound exudate

Info

Publication number: WO2011121127A1
Application number: PCT/EP2011/055138
Authority: WO
Inventors: Birgit Riesinger
Original assignee: Birgit Riesinger
Priority date: 2010-04-03
Filing date: 2011-04-01
Publication date: 2011-10-06
Also published as: DE102010014010A1

Abstract

The present invention relates to a wound care article adapted to different through-flow speeds of the wound exudate.

Description

Birgit Riesinger

Wound care articles adapted to different flow rates of the

wound exudate

The present application relates to a wound care article adapted to different flow rates of the wound exudate.

The aim is to design a new wound care product, in which the

Flow rate of the exudate is adapted to the needs of each wound. The wound care article should preferably be equipped with SORBION PLUS (wound distance mesh). Also, two flat sides forming the shell, as with SANA, may consist of SORBION PLUS.

The wound care article has at least one layer (or block) of rubber, silicone rubber or other hydrophobic perforated material. The material may be porous or non-porous. There may be at least one layer of a porous and at least one further layer of a non-porous material. Furthermore, the use of hyaluronic acid, e.g. B. in powder form, provided.

The inner material may consist of at least one layer of air foil (with air bubbles), wherein perforations are provided between the air bubbles, which are also warming

Have properties. The air foil may also be at least partially thermally bonded to the wall facing away from the wound wall. Also, a loose arrangement of the air foil with or without perforations comes into question. As non-porous materials, for example, metal foils may be present, also perforated. The

Metal foils may be laminated to another material (eg foam rubber).

The thermal insulating properties of the wound care article can also be achieved by at least one layer of staple fiber cotton nonwoven fabric. The cotton staple fibers have a length of 2 to 30 mm, are "twisted", that is not straight, and are provided with axial holes (hollow fiber), therefore suitable for a very fluffy arrangement, e.g.

between two PP nonwoven foils (like the sleeve of the SORBION SACHET). This cotton fleece can also be sprayed onto a wall and glued there.

Furthermore, the inner life may have different stiffness. For example:

Inhomogeneous material, material of different thickness, different layers, imprints in the selected area, etc. A tamponade with a wound spacer grid (for example: SORBION PLUS) may have a microfiber core, a catheter or suction valve.

If a layer of Polyurtehan (PUR) foam (layer) is placed on the SORBION PLUS (without bonding) and the negative pressure is generated, the smooth upper side of the S ORB ION PLUS lays tight against the wound, with the PUR foam protruding, d. H. an air cushion is created between these materials. This may be due to the fact that the adhesive force of the smooth upper surface of the SORBION PLUS with the wound surface is greater than the force generated by the negative pressure.

The interior may be differently "channeled" or branched, a hole (channel) may have a cascade-shaped or cup-shaped wall, and the channel may also be branched, as shown for example in the sketch. characters

Show it:

Fig.l a introduced in the perforated PUR foam flap, in a section through two surface layers of the wound care article connected to each other surface;

2 shows a section A-A of FIG. 1;

3 shows a detail of an inner layer of the wound-care article in the region of a cup-shaped hole, in a section;

Figure 4 shows two surface layers of solid plastic, with visible hole and channels, connected in a planar manner;

Figure 5 shows the channels branched off from the hole according to Figure 4, in plan view of the interconnected inner layers ..;

Fig. 6 shows an arrangement of the channels after removing an upper inner layer;

7 shows a section of a primary dressing with rectangular pivoting flaps, in plan view on its flat side;

8 shows an enlarged detail of a slot with pivoting flaps, in plan view on its flat side;

9 shows a section B-B according to FIG. 8;

FIG. 10 shows a wound-care article with inner layer of foam and with primary dressing, before the onset of the negative pressure; FIG.

FIG. 11 shows the wound-care article according to FIG. 10 after the onset of the negative pressure; FIG. Fig. 12 shows another embodiment of the branched channels, in the silicone foam;

13 shows a wound care article with a cover and with an inner layer of perforated air foil, in a section;

14 shows another wound care article, with an inner layer of an airlaid mat, in one

Cut;

15 shows a further wound care article, with a covered inner layer of perforated plastic, in a section;

Fig. 16 detail of a perforated bubble wrap, in plan view of its flat side.

In Fig. 1, a sheathed inner layer 1 of a wound care article is shown, which consists of two mutually surface-connected layers 1.1, 1.2, of which the layer 1.1 as "upper", ie sore facing and the other layer 1.2 as "lower", wound facing are called The cover made of liquid-permeable polypropylene fleece is with dotted line

(Reference numeral 2) indicated. A through hole 3 includes a round, elastic

Swing flap 4, whose location relative to the hole 3 on the amount, consistency and flow rate of the wound exudate depends. The inner layer has a plurality of holes 3 and pivoting flaps 4.

As shown in FIG. 2, the pivoting flap 4 takes away only a part, in terms of area, about half of the hole cross-section. The pivoting flap 4 merges into an annular film-like insert 5, which in turn is placed in a round, flat seat 6. The seat 6 is incorporated on the lower layer 1.2, concentric with respect to the hole 3. Such an arrangement of the insert 5 ensures a secure hold for those located within the hole 3

Swing flap 4. In a further, not shown embodiment, the pivoting flap on a surface which is only slightly smaller than the hole cross-section, such as throttle valve

Internal combustion engine, is.

The layers 1.1, 1.2 are made of solid, suitable for medical purposes latex. Optionally, at least one flat absorption body (not shown) may be used inside the enclosure 2, optionally with superabsorbent substance and with pulverulent material

Hyaluronic acid (hyaluronate) is added. The hyaluronate can also be added to the latex. The hyaluronate promotes the healing process, accelerates cell proliferation and binds significant amounts of fluid.

3 shows a solid inner layer 7 of silicone rubber, comprising a plurality of cup-shaped holes 8 (only one hole 8 is shown in the figure). For the inner layer, a hot crosslinked (HTV) silicone rubber was selected, containing - advantageously - organic peroxides for crosslinking. The material has a density of 0.45 g / cm ³ .

Fig. 4 shows an inner layer 9, consisting of an upper, wundabgewandten situation 9.1 and a lower layer 9.2, in which a channel system 10 is installed. As material for the layers 9.1, 9.2 is a finely structured, cross-linked polyethylene foam of hypoallergenic

Properties have been chosen. The PE foam is closed cell and not

absorbing, therefore, an additional, superabsorbent absorption body is still provided, which is arranged within a common shell (not shown).

The channel system 10 consists of a through-hole 11 and four channels 12.1, 12.2, 12.3, 12.4, branched off from the hole 11, crossways (see Fig. 5) and extending from the hole, along a surface 14 the lower layer 9.2 and then perpendicular to the surface. Fig. 6 shows the arrangement of the channels after the removal of the upper layer 9.1. There are four formed in the material of the lower layer 9.2, elongated grooves 13.1, 13.2, 13.3 and 13.4 to see that to the

Channel system 10 include. Another channel system (reference numeral 15) is shown in FIG. 12. Here, in the material of an inner layer 18, a likewise continuous but branched hole 16 is incorporated. The hole 16 is followed by lateral, obliquely arranged channels 17.1, 17.2. As a material for the inner layer 18 fine-pored nylon foam is provided.

Another way of controlling the flow is shown in FIG. 7, which shows a foil-like primary dressing 19. The primary dressing 19 ("wound spacer grid") consists of a flexible, thin film section 20 made of polyethylene, which in the present case is provided with a plurality of peripherally located, circular perforations 21 and centrally arranged, mutually parallel cuts pairs 22. Pair 22 consisting of two mutually parallel incisions forms two rectangular

Swing flaps 23.1, 23.2 (see Fig. 8) and an intervening, also rectangular hole 24, which may increase due to the flow of wound exudate (see Fig. 9). All perforations 21 and pivoting flaps 23.1, 23.2 are punched out and therefore flat.

Figures 10 and 11 show a foil-like, peripherally bonded to a wound 26

Wound covering 25, one lying between the wound cover 25 and the wound 26

Inner layer 27 and a primary dressing 28, which has been described in WO 2007/118652 of the Applicant.

The primary dressing 28 is placed with its smooth surface 29 on the wound, so that its crater-shaped perforations 30 point in the direction of wound covering 25. The primary dressing 28 rests on the wound such that at least a small, free space 33 (see Fig. 10) has remained between its smooth surface and the wound.

The wound cover 25 is provided with a suction head, not shown, and with a suction hose 31 with valve 32.

If the negative pressure is used (compare Fig. 11), the wound distance grid on the surface of the wound 26 creates a smooth and full surface and adheres there. This is achieved in that the adhesive force of the smooth surface 29 of the wound distance grid is slightly greater than the force of the negative pressure is generated. Between the inner layer 27 and the wound spacer grid, an air cushion 34 is formed (compare FIG.

The full-surface coverage of the wound through the wound distance grid allows its hemostatic properties to fully exploit. Wound healing accelerates.

The primary dressing 28 or 19 may be enriched with preferably pure titanium dioxide and other known haemostatic and wound healing promoting substances.

FIGS. 13, 14, 15 and 16 show u. a. an air-cushion film 35, which is used in the Wundpfiegeartikeln shown there. In order to ensure the breathability or permeability of such a bubble wrap for the wound exudate, perforations 37 (see Fig. 16) lying between the air bubbles 36 are provided.

FIG. 13 shows a prefabricated, planar, simple wound care article 50 which has a covered section 38 of the bubble wrap 35. The sheath 2 consists of an upper wound covering 39 made of PP fleece and the lower, wound-facing, already described primary dressing 28 (wound distance lattice). The task of the bubble wrap 35 is to keep the wound space warm for a long time.

In Fig. 14, a wound care article 60 is shown. According to FIG. 14, the bubble wrap film 35 is glued over its entire surface to the upper PP nonwoven (wound covering 39) in such a way that the air bubbles 36 point downwards (wound direction). A lower shell wall 40 consists of a PP nonwoven sheet 41 and the primary dressing 28 thermally bonded to the PP nonwoven sheet 41 (see detail Z, FIG. Between the upper wound cover 39 and the lower sheath wall 40, a middle sheath wall 42 made of PP fleece is still provided. The two shell walls 40, 42 include an inner layer 43 in the form of an airlaid mat with superabsorbent substances. The wound care article 60 can be glued to the wound. For this purpose, a circumferential adhesive strip 44 is provided with a removable protective strip 45.

In Fig. 15, a wound care article 70 is shown, which is aufklebbar on the wound on the adhesive strip 44. The wound care article 70 has an inner sheath 46 made of non-woven PP and a

Outer shell 47 on. The outer shell 47 is composed of an upper shell wall 48 and the lower primary dressing 28. The upper shell wall 48 in turn consists of a outer PP nonwoven sheet 49 and the area with the PP nonwoven sheet 49, thermally bonded bubble wrap 35th

Inner wrap 46 includes a perforated inner liner 51 of PUR foam. Optionally, a vacuum system indicated by 52 (dashed lines, FIG. 15) is provided.

Should the outer PP nonwoven sheet 49 be replaced by an airtight wound cover (not shown), an upper sheath wall 48 with double air cushioning would result.

LIST OF REFERENCE NUMBERS

1 inner layer

1.1 upper layer

1.2 lower position

2 serving

3 holes

4 swing flap

5 deposit

6 seat

7 inner layer

8 holes

9 inner layer

9.1, 9.2 Location

10 channel system

11 holes

12.1 ... 12.4 channel

13.1 ... 13.4 Groove

14 surface

15 channel system

16 holes

17.1, 17.2 channel

18 inner layer

19 primary association

20 section

21 perforation

22 pairs of cuts 23.1, 23.2 Swing flap

24 holes

25 wound cover

26 wound

27 inner layer primary dressing

surface

perforation

suction

Valve

room

bubble

Bubble Wrap

bubble

perforation

Section upper shell wall lower shell wall

PP nonwoven foil middle wall

inner layer

tape

Protection strip inner cladding

Outer shell upper shell wall

PP non-woven fabric

Wound care

inner layer

Wound care

Claims

Claims:

Wound care article adapted to different flow rates of wound exudate.