Abstract: Methods and systems for dynamically adjusting the compliance of a patient circuit. In an example, the technology relates to a medical ventilation system that includes a dynamic compliance circuit. The dynamic compliance circuit includes an inspiratory tube extending from an inhalation port of a medical ventilator, the inspiratory tube defining an inner lumen for carrying breathing gases from the inhalation port towards a patient; and a compliance adjustment covering coupled to the inspiratory tube, wherein adjustments to the compliance adjustment covering alter an effective compliance of the inspiratory tube. The system may also include a processor; and memory storing instructions that, when executed by the processor, cause the system to perform operations including, based a type of ventilation mode of the ventilator, causing an adjustment to the compliance adjustment covering to alter the effective compliance of the inspiratory tube.

Abstract: Systems and methods for filtration of expiratory gases are disclosed. In an example, the technology relates to a method for replacing expiratory filters of a ventilation system without breaking a breathing circuit. The method may include opening a first channel and closing a second channel such that expiratory gases flow through a first filter coupled to the first channel; closing the first channel and opening the second channel such that the expiratory gases flow through a second filter coupled to the second channel; and while the expiratory gases are flowing through the second channel, replacing filter media of the first filter while maintaining pressure in the breathing circuit.