Vacuum System and Endoscopy Arrangement for Endoscopic Vacuum Therapy

Vacuum system for endoscopic intracavitary intraluminal or intracorporeal vacuum therapy for aspirating body fluids, wound secretions or gases from a hollow space, such as a body cavity, a hollow organ, a tissue abscess or an intestinal lumen, in particular in creating of a temporary endoscopic closure of an intestinal lumen, the vacuum system comprising:

• a vacuum pump having a control input for receiving a control signal for control of its vacuum and having, on its negative pressure side, a connection for a vacuum drainage arrangement, and
• connected or connectable to the control input of the vacuum pump, a pressure regulating unit,
• having a test signal input for receiving at least one pressure test signal, which provides a measure for a pressure or negative pressure prevailing at the hollow space to be treated
• and which is designed,
• upon specification
• a) of a negative pressure value at the hollow space to be treated, being selectable from a predefined negative pressure value interval, and
• b) of an evacuation period, the value of which, situated between 0.5 and 5 seconds, is selectable,
• i) figuring in a predetermined dead volume of the vacuum drainage device arrangement that is connectable to the vacuum pump, to determine a first suction capacity of the vacuum pump, required for generating the specified negative pressure at the hollow space to be treated within the specified evacuation period, and to transmit a corresponding first control signal to the control input of the vacuum pump,
• ii) upon generating the specified negative pressure at the hollow space to be treated, to monitor the pressure test signal and to determine, as a function of the current pressure test signal, a second suction capacity of the vacuum pump, required for maintaining the specified negative pressure, and to transmit a corresponding second control signal to the control input of the vacuum pump;
• and
• iii) upon generating the specified negative pressure at the hollow space to be treated, if a deviation of the measured pressure or negative pressure from the specified negative pressure exists that exceeds a pre-defined threshold of the measured pressure or negative pressure, to determine a third suction capacity that is required for generating the specified negative pressure within the specified evacuation period and to transmit an appropriate third control signal to the control input of the vacuum pump;
• the vacuum pump being designed, as a function of the control signal currently being applied to its control input, to generate a suction capacity determined by the control signal.