Methods and systems for assessing characteristics of a lung of a patient. A method includes, during an applied positive end expiratory pressure, identifying a first position of a patient, acquiring first impedance data representative of at least a region of patient's lung when the patient is in the first position, during the applied positive end expiratory pressure, identifying a second different position of a patient, acquiring second impedance data representative of at least the region of patient's lung when the patient is in the second position, comparing the first impedance data with the second impedance data, and determining whether the applied positive end expiratory pressure is sufficient to effectuate recruitment.

A device for enclosing a positive end valve (PEEP valve) and converting the PEEP valve to an inline valve for use in a differential multi-ventilation system is described. The device includes a housing configured to enclose the PEEP valve. The housing also includes a ventilator-side arm, a pass-through arm and a patient-side arm. The pass-through arm permits extension of the multi-ventilation system to add one or more patients to the system.

Medical techniques include systems and methods for administering a positive pressure ventilation, a positive end expiratory pressure, and a vacuum to a person. Approaches also include treating a person with an intrathoracic pressure regulator so as to modulate or upregulate the autonomic system of the person, and treating a person with a combination of an intrathoracic pressure regulation treatment and an intra-aortic balloon pump treatment.

The present invention relates to the art of automatic regulation of pulmonary devices for imitating, assisting and/or enforcing the breathing process by converting Bag-Valve-Mask (BVM) or a similar device to enhance both phases of breathing: inhalation and exhalation while applying a variable pressure during the breathing process. It also replaces a mechanical chest compression to the sternum area for automatic pneumatic compression, and it could be complimented with the use of a Tens unit, can be used for extended period of time with a high level of reliability, simplicity, efficacy and low cost. The unique filtration system's goal in this invention is safety of the treating patient as well as assisting personnel. This portable and light device is recommended to be used as a resuscitator for the patients with mild to extremely suppressed or without respiratory drive. The source of power can be electrical, battery operated, manual or a combination thereof.

An anesthetic gas delivery system includes a gas machine for supplying anesthetic gas to a patient; a scavenging control system that controls a level of vacuum suction to evacuate waste anesthetic gas; and a user interface electronically coupled to the scavenging control system. The scavenging control system includes an air flow sensor external from the gas machine that measures the flow rate of the waste anesthetic gas through the scavenging control system; a control valve, such as a proportional solenoid valve, that is controllable to adjust the level of vacuum suction to adjust the flow rate of the waste anesthetic gas; and electronic control circuitry that is configured to receive a measured flow rate from the sensor and to control the control valve to adjust the level of vacuum suction based on the flow rate measured by the sensor. The electronic control circuitry further is configured to transmit flow rate information corresponding to the flow rate measured by the sensor to the user interface.

An automated mechanical ventilator may include a positive pressure source that periodically delivers periodic positive pressure ventilations to a patient when a pressure within the patient's airway is greater than a predetermined threshold. The ventilator may include an inspiratory lumen coupled with the positive pressure source. The ventilator may include an inlet valve interfaced with the inspiratory lumen. The inlet valve may open with each positive pressure ventilation. The ventilator may include an expiratory lumen. The ventilator may include a pressure sensor in fluid communication with the expiratory lumen that senses the pressure within the patient's airway. The ventilator may include an outlet valve interfaced with the expiratory lumen. The ventilator may include a controller that opens the first valve without delivering a positive pressure ventilation when the pressure measured by the pressure sensor is less than the predetermined threshold.

A ventilation adjustment method and a high-frequency ventilation system, which ensure stable and accurate oxygen concentration control within an oxygen concentration setting range, are disclosed. The ventilation adjustment method includes: determining a first gas flow rate control value and a second gas flow rate control value according to a target output flow rate and an oxygen concentration setting value; determining whether the first gas flow rate control value falls into a first dead zone range and whether the second gas flow rate control value falls into a second dead zone range; if the first gas flow rate control value falls into the first dead zone range, maintaining a first gas flow rate controller turned on in an expiratory phase; and if the second gas flow rate control value falls into the second dead zone range, maintaining a second gas flow rate controller turned on in the expiratory phase.

A patient interface comprising a cushion having a nasal plenum chamber, an oral plenum chamber, and a passage formed between the nasal and oral plenum chambers. The passage is configured to allow airflow to pass between the nasal and oral plenum chambers. The cushion also includes a valve including valve body and an adjustment structure that is positioned between the nasal chamber and the oral chamber and is movable relative to the valve body. The adjustment structure is movable between an open position that is configured to allow airflow between the nasal plenum chamber and the oral plenum chamber, and a closed position configured to limit airflow between the nasal plenum chamber and the oral plenum chamber. The adjustment structure is configured to allow airflow through a nasal vent in the closed position and is configured to limit airflow through the nasal vent in the open position.

A ventilator includes electronic control circuitry configured to control a supply of breathing gas for a plurality of respiratory cycles, measure a volume received by the patient in each of the plurality of respiratory cycles, and determine, for each cycle of the plurality of respiratory cycles, a cycle score corresponding to a deviation between the volume of the cycle and a predetermined target volume. The determined cycle score can be selected from a predetermined number of cycle scores that span positive and negative numbers based on the deviation. A pressure step value can be determined based on a plurality of cycle scores corresponding to the plurality of respiratory cycles, and a current pressure of the breathing gas is adjusted by an amount corresponding to the determined pressure step value. The pressure step value may be generated by dividing a sum of the plurality of cycle scores by a sample size.

Ventilator enables operator to enter into the microprocessor estimate of a patient's individual characteristic, such as weight, which the microprocessor uses to control delivered tidal volume and other parameters to match the patient. The operator can select one of several ventilator operational modes (intube, mask, CPR). Sensors input data to the microprocessor to maintain parameter optimizations and accuracy. Visual/audible alarms and tools activate when one or more parameters exceed or fail to exceed predetermined values for patient's weight. Manual over-ride is available. The ventilator has a quick start capability in which the operator turns on power, selects the automatic operating mode, enters patient's characteristic, selects control option starting automatic ventilation of proper volumes inhalation/exhalation periods, pressure, and oxy-air mixture.