Abstract: The object of the invention is a system with an electrically controlled source of gas flow or pneumatic power, comprising a block of calibration source of gas flow or pneumatic power connected pneumatically to the inspiratory section, a flow meter located in the inspiratory section, a microcontroller control block connected to the flow meter, comprising a flow meter calibration module, characterised in that the flow meter (131) is connected, on one side, between a first check valve (133A) of the inspiratory section and an inspiratory tube (134A) and its downstream second check valve (133B) of the inspiratory section and, on the other side, is connected between a third check valve (133C) of an expiratory section, connected to its downstream expiratory tube, (134B) and a shut-off valve (ZP), so that the flow meter (131) is located on a diagonal of a pneumatic bridge thus formed, and the calibration flow qi and the expiratory flow qe flow through the flow meter (131) alternately in the inhalation and exhalation

Abstract: The object of the invention is an inspiratory gas volume divider comprising at least two inspiratory lines (18, 19) having inspiratory branches (14,16) at ends thereof and comprising one-way valves (2,3) and at least two expiratory lines (20, 21) having expiratory branches (15,17) at ends thereof and comprising one-way valves (7,12). The inspiratory branches and expiratory branches are in pairs combined with each other in at least two inspiratory- expiratory pairs. The initial portions of the inspiratory lines are connected to the divider valve (23) provided with a control input. In the inspiratory lines, after the volume valve divider, there are included systems measuring gas volume (11,12) with output signals thereof delivered to the controller (22), and the output signal thereof is connected to the volume divider's input.

Abstract: An apparatus for controlling and dividing ventilation between lungs during their independent ventilation and connecting only one respirator with the lungs by means of a double-lumen bronchial tube. The apparatus comprises two parallel inspiratory paths and two parallel expiratory paths to separate gas flows between the respiratory and each of the lungs. Each path is connected to the double-lumen bronchial tube through inspiratory and expiratory branches respectively. One of the expiratory paths comprises a positive end-expiratory pressure valve to apply this pressure selectively, to one lung only. A threshold inspiratory valve is placed in one of the inspiratory paths having a common point with the expiratory path not containing the positive end-expiratory pressure valve. This threshold valve is connected in series with a pneumatic unidirectional valve and divides ventilation between the lungs and patterns optimal inspiratory flows.