Chitosan tissue dressing
A tissue dressing material for being applied in contact with a tissue of a patient. The tissue dressing material's main component is deacetylated native chitosan. Moreover, a liquid tissue dressing material for being applied in contact with a tissue of a patient, the tissue dressing material being an aqueous mixture. The main component of the constituent(s) of the mixture other than water is deacetylated native chitosan.
1. A tissue dressing material for being applied in contact with a tissue of a patient comprising at least 50% by weight native chitosan having a degree of acetylation below 2.5%, wherein the water uptake capacity of a solid phase of the tissue dressing material is less than 100% by weight.
2. The tissue dressing material according to claim 1 , wherein the tissue dressing material is present in the form of a solid or gel-like film.
3. The tissue dressing material according to claim 1 , wherein at least 70% by weight of the tissue dressing material is deacetylated native chitosan.
4. A liquid tissue dressing material for being applied in contact with a tissue of a patient, the tissue dressing material being an aqueous mixture comprising at least 50% by weight of the combination of all constituents other than water native chitosan having a degree of acetylation below 2.5%, wherein the tissue dressing material has a pH above 4.5.
5. The tissue dressing material according to claim 4 , wherein at least 70% by weight of the constituent(s) of the mixture other than water is deacetylated native chitosan.
6. The tissue dressing material according to claim 1 or 4 , wherein
the native chitosan's degree of acetylation is below or equal to 2%.
7. The tissue dressing material according to claim 1 or 4 , wherein
the native chitosan is at least partly present as a chitosan salt.
8. The tissue dressing material according to claim 1 or 4 , wherein
the tissue dressing material comprises at least one pharmaceutically active compound.
9. The tissue dressing material according to claim 1 or 4 , wherein
the tissue dressing material has a pH below 6.3.
10. The tissue dressing material according to claim 1 or 4 , wherein
the tissue dressing material is transparent.
11. A tissue dressing, comprising:
a first layer, which layer is formed of the tissue dressing material according to claim 1 or 4 , and
another layer formed of another material.
12. The tissue dressing of claim 11 , wherein
the other layer acts as a support.
13. The tissue dressing of claim 11 , wherein
the other layer acts as an at least partial moisture barrier.
14. A method of treating a tissue of a patient, comprising a step of applying a tissue dressing material in contact with the tissue of the patient,
the tissue dressing material comprising at least 50% by weight native chitosan having a degree of acetylation below 2.5%,
wherein the water uptake capacity of a solid phase of the tissue dressing material is less than 100% by weight.
15. A method of treating a tissue of a patient, comprising a step of
applying a liquid tissue dressing material in contact with the tissue of the patient, the tissue dressing material being an aqueous mixture, the tissue dressing material comprising at least 50% by weight of the combination of all constituents other than water, native chitosan, having a degree of acetylation below 2.5%, wherein the tissue dressing material has a pH above 4.5.
16. The method of claim 14 or 15 wherein the method of treating is locally confined antibacterial treatment of the patient's tissue.