Abstract: A blood pump system includes a blood pump and a corresponding controller. The blood pump includes an impeller that is sealed within the pump housing and hydrodynamically suspended within the pump housing. The pump impeller includes magnets, and is the rotor of a brushless direct current (DC) motor that is driven by electrical signals through stator wire coils in the pump housing, which creates a rotating magnetic field. The rotating magnetic field attracts the magnetized impeller and spins it with the rotating field. The controller provides field-oriented control for the brushless DC motor in the blood pump. The field-oriented control in the controller is provided in a programmable logic device separate from a control processor so that a software or hardware failure related to the control processor does not stop the blood pump. The field-oriented control allows sensing blood flow through the pump without having sensors in the blood stream.

Abstract: A sieve module includes an impermeable housing and an adsorptive media bed. The impermeable housing is puncturable at a first puncture location to receive gas from an exterior of the impermeable housing. The impermeable housing is also puncturable at a second puncture location to expel gas to the exterior of the impermeable housing. The adsorptive media bed is disposed within the impermeable housing. The gas flows through the impermeable housing from the first puncture wound to the second puncture location by flowing through the adsorptive media bed.

Abstract: An oxygen generating system includes an oxygen generating unit including a housing having disposed therein i) at least two sieve beds, ii) a piston disposed between and operatively connected to the sieve beds, and iii) at least one magnet operatively disposed on the piston. A coil is wrapped around an exterior surface of the housing and is in operative communication with the magnet(s). The coil is configured to drive the piston along a length of the housing between the sieve beds during at least one stage of an oxygen generating cycle. The driving of the piston is accomplished via an electromagnetic field formed between the coil and the magnet(s). Also disclosed herein is a method for generating an oxygen-enriched gas using the oxygen generating system.

Abstract: A system for generating oxygen includes a compression means configured to compress a feed gas including at least nitrogen and oxygen, and at least one sieve bed configured to generate an oxygen-enriched gas from the compressed feed gas. The sieve bed(s), having an internal gas pressure ranging from about 1 psi to about 10 psi, include a housing and a nitrogen-adsorption material operatively disposed in the housing. The nitrogen-adsorption material is configured to adsorb at least nitrogen from the compressed feed gas during a pressure swing adsorption process, thereby generating an oxygen-enriched gas for a user.

Abstract: A method of generating an oxygen-enriched gas for a user via an oxygen generating system is disclosed herein. The oxygen generating system includes at least one sieve bed having a nitrogen-adsorption material disposed therein, the nitrogen-adsorption material being configured to adsorb nitrogen from a feed gas introduced thereto, thereby generating the oxygen-enriched gas therefrom. The at least one sieve bed has an internal gas pressure within a volume defined by the at least one sieve bed. The method includes measuring the internal sieve bed pressure, measuring an ambient atmospheric parameter, and detecting inhalation of the user. The method further includes selectively controlling, substantially in real time, delivery of the oxygen-enriched gas to the user based on at least one of the internal sieve bed gas pressure measurement, the ambient atmospheric parameter measurement, the inhalation detection, or combinations thereof.

Abstract: A monitoring system for a portable oxygen generating system is provided. The system includes a system monitoring module that monitors an operational status of one or more components of the portable oxygen generating system. An alarm prioritization module determines an alarm priority level based on the operational status. An alarm system control module generates one or more alarm signals based on the alarm priority level.

Abstract: An oxygen concentrator system includes a portable system having a portable oxygen concentrator with a portable compressor. The portable system further includes a power supply, a control system, and a portable oxygen outlet configured to selectively provide a first direct fluid supply. A station is configured to engage the portable system. The station may be selectively controlled by the control system when engaged with the portable system. The station may have a stationary oxygen concentrator that is inoperable for delivering a second direct fluid supply via a stationary oxygen outlet during delivery of the first direct fluid supply via the portable oxygen outlet when the station and portable system are engaged. Further, the portable oxygen concentrator is inoperable for delivering the first direct fluid supply via the portable oxygen outlet during delivery of the second direct fluid supply via the stationary oxygen outlet when the station and portable system are engaged.

Abstract: An oxygen delivery system includes first and second sieve beds configured to selectively receive a supply fluid and separate a substantially oxygen-rich fluid therefrom. A patient conduit having a patient outlet is in alternate selective fluid communication with the sieve beds. The system includes a breath-detection device in fluid communication with the patient conduit, configured to calculate a rate of breathing and to trigger, in response to a breath detection, an output of a predetermined volume of the substantially oxygen-rich fluid alternately from a respective one of the sieve beds. The system also includes a device configured to measure the output flow rate at predetermined intervals. The output, having a target flow rate and a flow rate, occurs during a respective dynamically adjusted patient oxygen delivery phase, which is dependent upon the target flow rate, the output flow rate, and/or the breathing rate.

Abstract: A breath detection system includes a conduit for gas delivery, e.g. oxygen. A pressure transducer is configured to: monitor a static gas pressure responsive to inhalation and exhalation, at a predetermined location of the conduit interior; and output a pressure signal related to the static gas pressure. A differentiator outputs a pressure change rate signal including a voltage level related to a time differential of the pressure signal. A comparator outputs a comparator signal including a comparator output voltage level related to a difference between the voltage level included in the pressure change rate signal and a detection threshold, where a predetermined comparator output voltage level range is indicative of the beginning of inhalation.