1. A method of creating pleurodesis in a mammal, comprising administering to a subject in need thereof silver or a silver salt, the total dose of which is from about 5 to 500 mg per administration period. The method of claim 1, wherein the total dose is from about 10 to 450 mg. The method of claim 1, wherein the total dose is from about 10 to 300 mg. The method of claim 1, wherein the administration period is from about 2 to 30 days. The method of claim 1, wherein the administration period is from about 3 to 10 days. A method of creating a pleurodesis in a mammal, comprising administering to an object in need thereof, silver or a silver salt, the average daily dose of which is from about 0.005 mg / kg / day to 2 mg / kg / day over the administration period. The method of claim 6, wherein the average daily dose is from about 0.01 mg / kg / day to 1 mg / kg / day. The method of claim 6, wherein the average daily dose is from about 0.05 mg / kg / day to 0.7 mg / kg / day. The method of claim 6, wherein the administration period is from about 2 to 30 days. The method of claim 6, wherein the administration period is from about 3 to 10 days. A method according to any one of claims 1 to 10, wherein the mammal is a human. A method according to any one of claims 1 to 10, wherein the method is effective in treating or preventing pleural diseases selected from the group consisting of persistent pleural effusions, benign pleural effusions and pneumothorax. A set of medical instruments containing a device for removing fluid from a mammary pleural cavity and instructions for use. 14. The set of medical instruments according to item 13, in which1. Способ создания плевродеза у млекопитающего, содержащий введение субъекту, нуждающемуся в этом, серебра или соли серебра, общая доза которого составляет приблизительно от 5 до 500 мг за период введения.2. Способ по п.1, в котором общая доза составляет приблизительно от 10 до 450 мг.3. Способ по п.1, в котором общая доза составляет прибли
