An artificial ventilation system and relative control method, the ventilation system is suitable for application to CPAP (Continuous Positive Airway Pressure) breathing helmets to provide artificial ventilation to a patient with respiratory difficulties destined for so-called “sub-intensive” therapies. The artificial ventilation system provides a fully automated ventilation and does not require frequent checks by specialized medical personnel. The relative control method allows automatic control of the entire artificial ventilation system and implements innovative control strategies and techniques.

An anaesthetic halocarbon capture system is provided. The system includes a pressure-intolerant sleeve containing filter material for capturing one or more types of anaesthetic halocarbon prior to supercritical fluid extraction, and a pressure-tolerant housing into which the sleeve can be inserted so as to permit exposure of the sleeve contents to pressures required for supercritical fluid extraction.

The disclosed invention provides a breathing circuit that includes a volume regulator that includes only three ports which include an inlet port connected to the exhalation port, a first outlet port connected to atmosphere, and a second outlet port connected to the moisturizer assembly. The breathing circuit is used for a ventilation system that delivers breaths to a patient. The inlet port of the volume regulator includes a flapper valve that moves only inward at an open position to receive the exhaled gas from the patient. The first outlet port includes a flapper valve that moves outward at an open position to exhaust gas in the volume regulator into the atmosphere. The second outlet port includes a flapper valve that moves only outward at an open position to exhaust gas in the volume regulator into the moisturizer assembly.

A process (10), with a computer program, a device (30) and a ventilation system (40) detect a leak in a patient gas module, which suctions and analyzes a continuous sample gas stream from a ventilated patient (20), in a ventilation system for ventilating a patient (20). The process includes a determination (12) of a first time curve of a carbon dioxide concentration in a breathing gas mixture of the patient (20) and the determination (14) of a second time curve of a concentration of another gas in the breathing gas mixture, which gas is different from carbon dioxide. The process (10) further includes a determination (16) of a statistical similarity indicator between the first time curve and the second time curve and the detection (18) of the leak based on the similarity indicator.

The disclosed invention provides a breathing circuit that includes a volume regulator that includes only three ports which include an inlet port connected to the exhalation port, a first outlet port connected to atmosphere, and a second outlet port connected to the moisturizer assembly. The breathing circuit is used for a ventilation system that delivers breaths to a patient. The inlet port of the volume regulator includes a flapper valve that moves only inward at an open position to receive the exhaled gas from the patient. The first outlet port includes a flapper valve that moves outward at an open position to exhaust gas in the volume regulator into the atmosphere. The second outlet port includes a flapper valve that moves only outward at an open position to exhaust gas in the volume regulator into the moisturizer assembly.

The present disclosure is directed to systems and methods of providing a mixed-gas inhalant to a patient via a gas recirculation loop. The gas recirculation loop receives a first mixed-gas exhalant having a first carbon dioxide concentration from the patient, one or more carbon dioxide removal devices discharge a second mixed-gas exhalant having a second carbon dioxide concentration that is less than the first carbon dioxide concentration. The second mixed-gas exhalant is combined with a mixed-gas supply to provide a mixed-gas inhalant. The mied-gas supply includes a first gas and a second gas. The mixed-gas supply is pressure and flow controlled to produce a mixed-gas inhalant having a defined composition delivered to the patient at a defined volumetric flow rate. The first gas may include a gas containing oxygen and the second gas may include a gas mixture containing a noble or inert gas and oxygen.

A system for tracking anesthetic agent in a vaporizer reservoir can include a mass flow sensor configured to measure a flow rate entering or exiting a vaporizer chamber, a gas pressure sensor configured to measure a pressure of a mixed gas provided from the vaporizer chamber, and a processor to calculate a remaining agent time based on at least the gas flow rate, the pressure of the mixed gas, and an anesthetic concentration in the mixed gas. The processor can also provide the remaining agent time for display to a clinician.

A system (1000) feeds substances to a patient (30) with a ventilation of the patient and with an oxygenation of the patient. The system (1000) has at least one ventilation system (1), a sedation by inhalation system (17) with a dispensing system (7), an oxygenation system (2), a breathing gas dispensing path (3), a purge gas dispensing path (4), a breathing gas connection system (5), a connection element (25) located adjacent to the patient, an oxygenation connection system (6) and a switching unit (8). The switching unit (8) is configured to distribute and to split a quantity of an inhalable substance dispensed into a gas mixture by means of the dispensing system (7) between the connection element (25) located adjacent to the patient and the oxygenation system (2). At least one control unit (9, 10, 11, 12) is configured to control the switching unit (8) and/or the system (1000).

A carbon dioxide absorber (1) and a closed-circuit breathing apparatus (2) with the carbon dioxide absorber are based on the carbon dioxide absorber having an inlet (3) and an outlet (4) gas-tight connectable by a flow duct (5), in which a material (6) is arranged, which absorbs some carbon dioxide contained in the breathing gas stream sent through the material. The flow duct (5) is enclosed in some areas by a housing (7), in which a window element (8) is arranged. A display element (9) arranged movably in the flow duct (5) is visible through the window element from outside of the housing and/or through which window element the radiation reflected by the display element (9) exits to the outside. A distance between the window element (8) and the display element (9) varies as a function of the quantity of carbon dioxide-absorbing material arranged in the flow duct (5).

The disclosure provides a way to supplement the tidal volume delivered to the patient by a leaking re-breather when the delivered volume becomes less than that set by the ventilator (in either pressure-regulated or volume modes). This may be accomplished with a shunt—a gas conduit joining the non-patient side of the re-breather to the patient side. A low-resistance, plenum or a draw-over vaporizer may also be incorporated into the gas pathway. Such a device may include a housing with a movable partition separating an actuating side from a patient side. The housing includes a ventilator orifice for pneumatic communication between a ventilator and the actuating side and a patient orifice for pneumatic communication between the patient side and a patient. A shunt defines a bypass flow path from the actuating side and to the patient side when the moveable partition is at a maximal displacement towards the patient side.