10 Medical devices for controlling airway pressure for use in mechanical ventilation and intubation procedure; Medical devices for physiological measuring, regulating and controlling endotracheal and tracheostomy tubes during ventilation; Medical ventilators for preventing complications related to prolonged mechanical ventilation; Systems comprising medical apparatus and accessories for use in mechanical ventilation being endotracheal tubes, tracheostomy tubes, laryngeal mask airways; Respiratory guard systems for the treatment of ventilated patients comprising of an electronic control unit, tubes, and sensors for preventing complications related to prolonged mechanical ventilation being ventilator-associated pneumonia (VAP), mucosal ulcerations, granulomas, tracheal stenosis, and tracheoesophageal fistulae; Structural parts and fittings for all the aforesaid goods being endotracheal tubes, tracheostomy tubes, laryngeal mask airways