Multi-layered wound dressing containing an hydrocolloid and activated carbon

1. A wound dressing for therapeutic wound care,

wherein the wound dressing comprises a multilayer structure, wherein the multilayer structure comprises:

(i) at least one layer comprising at least one hydrocolloid, wherein the hydrocolloid of the hydrocolloid-comprising layer is selected from collagen, and wherein the layer comprising hydrocolioid comprises a collagen foam, and

(ii) at least one layer comprising activated carbon, wherein the activated carbon-comprising layer comprises a spherical activated carbon, wherein the activated carbon of the activated carbon-comprising layer is arranged between a first textile fabric and a second textile fabric, and wherein the activated carbon of the activated carbon-comprising layer has a micropore volume content formed of micropores having pore diameters of 20 Å of at least 60%, based on the total pore volume of the activated carbon,

wherein the activated carbon-comprising layer comprises a spherical activated carbon with absolute particle sizes in the range from 0.01 to 3 mm and with average particle sizes, determined as per standard method according to ASTM D2862-97/04, in the range from 0.05 to 2.5 mm, and

wherein the activated carbon of the activated carbon-comprising layer is characterized by the following properties;

a micropore volume formed of micropores with pore diameters of <20 Å in the range from 0.40 cm 3 /g to 2 cm 3 /g;

a specific micropore surface area content formed of pores with pore diameters of <20 Å of at least 50%, based on the specific total BET surface area of the activated carbon;

a specific BET surface area in the range from 500 to 3,000 m 2 /g;

a total pore volume in the range from 0.1 to 4 cm 3 /g;

a burst-strength, determined as the weight loading capacity per activated carbon particle, in the range from 10 to 50 Newtons; and

a fractal dimension of the open porosity of at least 2.3.

2. The wound dressing as claimed in claim 1 ,

wherein the layer comprising hydrocolloid is obtained by application of a dispersion or solution of a hydrocolloid on a support and subsequent drying with expansion of the hydrocolloid.

3. The wound dressing as claimed in claim 1 ,

wherein the hydrocolloid of the layer comprising hydrocolloid is of porcine, bovine or equine origin.

4. The wound dressing as claimed in claim 1 ,

wherein the layer comprising hydrocolloid forms an outer layer of the wound dressing.

5. The wound dressing as claimed in claim 1 ,

wherein, upon application of the wound dressing to a wound, the layer comprising hydrocolloid is arranged on the side of the wound dressing facing the wound to be treated.

6. The wound dressing as claimed in claim 1 ,

wherein the layer comprising hydrocolloid has a thickness in the range from 0.01 to 100 mm.

7. The wound dressing as claimed in claim 1 ,

wherein the layer comprising hydrocolloid makes up 5% to 95% of the total thickness of the wound dressing.

8. The wound dressing as claimed in claim 1 ,

wherein the activated carbon of the activated carbon-comprising layer is comprised of abrasion-resistant and dustless spherical activated carbon particles.

9. The wound dressing as claimed in claim 1 ,

wherein the activated carbon of the activated carbon-comprising layer has a biocidal or biostatic effect.

10. The wound dressing as claimed in claim 1 ,

wherein the activated carbon of the activated carbon-comprising layer is present in an amount of 1 to 1,000 g/m 2 of the wound dressing.

11. The wound dressing as claimed in claim 1 ,

wherein the activated carbon of the activated carbon-comprising layer is incorporated onto or into the layer comprising hydrocolloid.

12. The wound dressing as claimed in claim 1 ,

wherein the individual layers of the wound dressing are respectively bonded to one another or form a composite.

13. The wound dressing as claimed in claim 1 ,

wherein the wound dressing further contains at least one active substance selected from the group consisting of antimicrobially acting active substances, disinfecting active substances, inflammation-inhibiting active substances, hemostyptic active substances and wound healing-promoting active substances.

14. A method of treating a patient suffering from a wound and or a tissue break, wherein the method comprises the step of applying to the wound or tissue break a wound dressing as defined in claim 1 .

15. The method of claim 14 for at least one of therapeutic treatment of mechanical wounds, cutting wounds, piercing wounds, crushing wounds, laceration wounds, scratch wounds, abrasion wounds; thermal wounds, wounds triggered by heat or cold burns; chemical wounds, wounds triggered by erosion with alkalis and/or acids; wounds due to radiation, wounds triggered by actinic radiation and ionizing radiation.