[Intermittent positive pressure ventilation of the lungs with the PO-6 respirator]. 
A modified Soviet ventilator PO-6 is presented suitable for performing intermittent mandatory ventilation (IMV) in combination with continuous positive airway pressure ventilation (CPAP).  Some requirements for hardware necessary to realize IMV and CPAP modes are specified, and a critical evaluation of capabilities and disadvantages of the modified design is given in a view of these requirements.