1. A device for vacuum therapy of wounds, comprising: (a) a coating material for hermetically closing the wound space； (b) if necessary, means for connecting a vacuum source； and (c) a wound dressing containing (c1) open-cell foam, preferably polyurethane foam, (c2) an ointment base and (c3) a swellable substance, wherein the total proportion of the ointment base (c2) of the ointment and swellable substance (c3) is 10-95 mass. % of the total weight of the dressing on the wound. 2. The device according to claim 1, characterized in that the open-cell foam (c1) has a tensile strength of 60-500 kPa, measured in accordance with DIN 53571, and / or an elongation at break of 80-700%, measured in accordance with DIN 53571.3. The device according to claim 1, characterized in that the open-cell foam (c1) has an air permeability of 2000-9000 l / (m / s), measured in accordance with DIN EN ISO 9237.4. The device according to claim 1, characterized in that the open-cell foam (c1) has a bulk density of 10-40 kg / m, measured in accordance with DIN EN ISO 845.5. The device according to claim 1, characterized in that the open-cell foam (c1) is a polyurethane foam obtained by converting a mixture containing components (i) a polyisocyanate, (ii) a polyol； in particular a polyester polyol, (iii) a catalyst and (iv) a blowing agent. 6. The device according to claim 1, characterized in that the open-cell foam (c1) is a polyester and polyurethane foam with air permeability of 2000-4000 l / (m / s), measured in accordance with DIN EN ISO 9237, and the total proportion the basis (s2) of the ointment and swelling substance (s3) is 33-71 mass. % of the total weight of the dressing on the wound. 7. The device according to claim 1, characterized in1. Устройство для вакуумной терапии ран, содержащее:(a) покровный материал для герметичного закрывания пространства раны；(b) при необходимости средство для подсоединения вакуумного источника； и(c) повязку на рану, содержащую(c1) пенопласт с открытыми
