Abstract: An improved system and method of determining a low water and/or water-out condition in a humidifier chamber of a respiratory or surgical humidifier system can use a specific frequency band to detect changes in a temperature of a heater plate. The temperature changes can correlate to the specific heat capacity value of the humidifier chamber. The low water and/or water-out detection process can be performed without having to determine the gases flow rate and/or can be run continuously. A heater plate assembly of the system can include a compliant insulation sheet to improve thermal coupling between the heating element and the top heating plate of the heater plate assembly, thereby improving the low water and/or water-out detection process.

Abstract: A filter holder for a mask, includes: an air passage, with a backflow prevention means being located in a portion thereof; a filter receptacle surrounding the air passage, accommodating a filter therein, and comprising an air inlet and an air outlet on both ends thereof, respectively; and a passage-partitioning portion spaced apart from the filter receptacle and located to face the backflow prevention means with respect to the air passage, with a distal end thereof protruding into the air outlet to cause a direction in which air purified through the filter receptacle flows to be changed.

Abstract: Disclosed herein are novel designs of a medical tube for delivering a respiratory gas to a subject in respiratory therapy, wherein the medical tube is in fluid connection with a user interface and a respiratory device. The medical tube has a tubular body, a first rib helically extending along the outer surface of the tubular body, and optionally, a second rib disposed next to the first rib, and optionally, a membrane encapsulating the first and/or second ribs thereby creating a helical space along the outer surface of the tubular body. In some embodiments, the first rib has a lumen and at least one wire disposed outside the lumen. In other embodiments, the first rib is free of any lumen and includes one or more wires extended therethrough. The lumen of the first rib or the helical space created by membrane encapsulation is configured to monitor the temperature, humidity, flow rate or pressure of the respiratory gas or an exhaled/inhaled gas of a subject.

Abstract: An oxygen therapy system receives data for an elapsed time such as a flow rate of oxygen gas, and a blood oxygen level or a carbon dioxide partial pressure in arterial blood (PaCO2) level of a user, from an oxygen supply device, calculates a proportion of a duration for each oxygen gas flow rate during which the blood oxygen level or PaCO2 is in a prescribed range from the acquired data in which the oxygen gas flow rate fluctuates with the blood oxygen level or carbon dioxide partial pressure in arterial blood (PaCO2), and displays the calculated data as a histogram or pie graph on a terminal which a healthcare worker such as a physician operates.

Abstract: A personal protective equipment system including a face mask and an ultraviolet germicidal irradiation stage to irradiate incoming volume of air before being introduced to the user. There is included a flexible printed circuit enclosed within a housing of the face mask, the flexible printed circuit having an array of UV LED circuits. A fan is provided to drive the volume of air through a passage within the mask.

Abstract: A ventilator (1) with a control unit (49). The control unit (49) controls the inhalation valve (41) and the exhalation valve (43) in order to raise an inhalation pressure level from a first pressure level to a predefined second pressure level and to maintain the inhalation pressure level for a first predefined time period and the control unit (49) controls the inhalation valve (41) and the exhalation valve (43) to raise the second pressure level to a predefined third pressure level and to maintain the third pressure level for a second predefined time period. The control unit (49) takes into consideration predefined values (80) for controlling the pressure levels and for controlling the time periods.

Abstract: A protective oxygen mask is disclosed herein. The mask includes a main body defining an exterior surface and an interior portion. At least one attachment structure defines a first loop extending from a first side of the main body and a second loop extending from a second side of the main body. At least a portion of one of the loops includes a hollow tube section communicative with an oxygen source. An interior tube communicative with the hollow tube section of the first loop extends at least partially into the interior portion of the main body. Accordingly, oxygen flows from the oxygen source, through said hollow tube section of one of the loops, into the interior hollow tube section, and finally, into the interior portion of the main body via a plurality of openings.

Abstract: A respiratory monitoring system includes (10) a mechanical ventilator (12) configurable to perform a ventilation mode in that includes an inhalation gas delivery phase and provides extrinsic positive end-expiratory pressure (PEEP) at a PEEP level during an exhalation phase. A breathing tubing circuit (26) includes: a patient port (28), a gas inlet line (16) connected to supply gas from the mechanical ventilator to the patient port, a gas flow meter (30) connected to measure gas flow into lungs of the patient, and a pressure sensor (32) connected to measure gas pressure at the patient port. At least one processor (38) is programmed to: compute a proxy pressure comprising an integral of gas flow into the lungs measured by the gas flow meter; and trigger the inhalation gas delivery phase of the ventilation mode when the proxy pressure decreases below a trigger pressure threshold.

Abstract: Systems and methods for model-driven system integration on a ventilator comprise a modeled exhalation flow. Ventilator flow sensors contain components that are easily damaged or impacted and have high rates of failure. Knowledge failure frequency and type may help determine when to replace, clean, or calibrate a flow sensor. A modeled exhalation flow may be trained for a ventilator. Additionally, the modeled exhalation flow may be compared to a flow sensor flow to determine a specific failure. Additionally or alternatively, the modeled exhalation flow may supplement, weight, or replace a faulty flow sensor measurement. These systems and methods may assist in identifying an inaccurate flow sensor measurement and/or providing a more accurate modeled flow estimate, thus increasing accuracy in patient-ventilator interactions.

Abstract: In accordance with the present disclosure, a system and method of intelligent control is provided that is based on machine learning, to modulate end-tidal concentration levels through continuous adjustments in the volume and concentration of a flow of incoming respiratory gases. The system and the method are able to continually estimate and adjust new gas flows that are administered for a user to inhale in immediate future moments of inspiration, based on the concentration and pressure signals collected at the actual moment of breathing and at previous moments of breathing, without the need for reservoirs to store inspired or expired gases, or for aprioristic physiological models.

Abstract: An intubation device utilizes a steerable endotracheal tube guide to position an endotracheal tube at a laryngeal opening, and is also configured for soft tissue retraction to improve visualization of the laryngeal opening. An ETT is positioned within an overtube of intubation device having proximal and distal ends and a flexible tip. The distal end houses a feeder mechanism for displacing the endotracheal tube through the overtube. A hood includes a stem, base, and expandable body and is affixed to the overtube's distal end. The ETT-containing overtube is precisely positioned at a laryngeal opening via positioning effects of body expansion, activation of a tip director, and/or flexible tip articulation. Unhindered visualization of the laryngeal opening is achieved by expansion of the expandable body, pushing soft tissue outwardly and extensibly. An actuation module controls the feeder mechanism as well as the flexible tip to position flexible tip and endotracheal tube.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: A medical tube transports gases to and/or from a patient. The medical tube includes a bead wrapped around a longitudinal axis of the medical tube. The bead forms a first portion of a lumen wall of the medical tube. The medical tube also includes a film wrapped around the longitudinal axis of the medical tube. A first portion of the film overlies the bead, and a second portion of the film forms a second portion of the lumen wall. The lumen wall, formed by the bead and the second portion of the film forms a substantially smooth bore. The medical tube can be reusable or reprocessable.

Abstract: An ultrasonic vibrator driving apparatus performs driving by applying an alternating voltage as a drive voltage to an ultrasonic vibrator that includes a piezoelectric element and has a unique resonance frequency. The drive voltage is generated with a variable frequency in a frequency range including the resonance frequency of the ultrasonic vibrator. The frequency of the drive voltage is repeatedly swept with a predetermined sweep width and a predetermined sweep period so as to include the resonance frequency, based on a reference frequency set according to the resonance frequency of the ultrasonic vibrator. The sweep period and the sweep width are restricted by being associated so as to fall within a predetermined allowed range on a two-dimensional map divided by the sweep period and the sweep width.

Abstract: Disclosed is a high-temperature virus-killing mask, including a sunhat, a heating component and a mask body. The heating component comprises a high-temperature microtube and a base, both arranged in the sunhat. The high-temperature microtube is provide with a resistance wire which may be energized to generate heat to enable the temperature in the high-temperature microtube to rise up to about 200° C.