An oxygen concentrator includes one or more adsorbent sieve beds operable to remove nitrogen from air to produce concentrated oxygen gas at respective outlets thereof, a product tank fluidly coupled to the respective outlets of the sieve bed(s), a compressor operable to pressurize ambient air, one or more sieve bed flow paths from the compressor to respective inlets of the sieve bed(s), a bypass flow path from the compressor to the product tank that bypasses the sieve bed(s), and a valve unit operable to selectively allow flow of pressurized ambient air from the compressor along the one or more sieve bed flow paths and along the bypass flow path in response to a control signal. The valve unit may be controlled in response to a command issued by a ventilator based on a calculated or estimated total flow of gas and entrained air or % FiO.sub.2 of a patient.

An oxygen concentrator (100) may have a moisture conditioning system. In some implementations, the concentrator includes a compressor to induce feed gas into the concentrator. A first pathway may receive the feed gas from the compression system. The first pathway may be configured to draw moisture to produce moisture reduced feed gas. The first pathway may lead the moisture reduced feed gas to sieve bed(s) which produce oxygen enriched air with the moisture reduced feed gas. An accumulator may be configured to receive the produced oxygen enriched air from the sieve bed(s). A second pathway from the accumulator may apply the drawn-out moisture to the produced enriched air to produce humidified enriched air. A third pathway may transfer the drawn-out moisture from the first pathway to the second pathway. An outlet coupled with the second pathway may release the humidified enriched air from the concentrator for a user.

A method and system for foot-actuated device to switch between a vacuum supply and an oxygen supply in a medical environment. The system enables a user to press down on the device to compress a first tube and open a second tube. When the user releases the device, the first tube is opened and the second tube is compressed.

An apparatus, system, and method for controlling tracheostomy weaning. The apparatus includes a lumen defining a flow path for air. The flow path is configured to communicate fluidically with an airway of a patient. A control valve coupled to the lumen is configured to automatically and selectively occlude the lumen to control a flowrate of the air passing through the lumen in real time based on respiratory data obtained from the patient.

Devices and methods for allowing for improved assisted ventilation of a patient. The methods and devices provide a number of benefits over conventional approaches for assisted ventilation. For example, the methods and devices described herein permit blind insertion of a device that can allow ventilation regardless of whether the device is positioned within a trachea or an esophagus.

A respiratory therapy apparatus is operable to deliver multiple types of therapy to a patient. The apparatus includes a main housing and a nebulizer tray that selectively attaches to a bottom of the main housing. The apparatus also includes a filter housing unit having an antenna surrounding a pneumatic passage and a transponder chip coupled to the antenna. The main housing has also has an antenna that surrounds a respective pneumatic passage of a main outlet port of the apparatus. The main housing includes a reader that controls communication between the antennae. The main housing of the apparatus also has a pivotable hose support plate, a firmware upgrade port underneath part of the top wall of the housing, and a graphical user interface (GUI) that displays various user inputs for control of the apparatus and that displays various alert conditions that are detected.

Methods and devices for blending of fluids are disclosed. A fluid blender has a fluid inlet to receive a fluid, a nozzle with a convergent shape tapering down towards a nozzle end, a mixing chamber with holes arranged on a wall, and a mixture outlet having a divergent shape. In some aspects, a rotary sleeve is externally placed around the wall. The rotary sleeve has slits with a variable shape along its lateral extension. In other aspects the fluid blender has inlet tubes with check valves and a blending tube. An inlet tube has an adjustable orifice to adjust flow inside the blender.

There is provided an attachment device for maintaining positive fluid pressure, the attachment device comprising a body having a fluid outlet port and at least two positive pressure fluid inlet ports; wherein each of the at least two positive pressure fluid inlet ports is connectable to a respective fluid source; wherein each of the at least two positive pressure fluid inlet ports is in fluid communication with the fluid outlet port; wherein each of the at least two positive pressure fluid inlet ports comprises an attachment device mechanism for selectively starting and stopping a flow of fluid from the respective fluid source to the fluid outlet port, and wherein the attachment device mechanism comprises a valve moveable between an open valve position and a closed valve position. An attachment device, connector, and method of using an apparatus suitable for a ventilator is also disclosed.

Systems and methods are provided for detecting unacceptable accelerations by an anesthetic vaporizer, such as due to drops and mishandling. In one embodiment, a method for an anesthetic vaporizer comprises determining a quantitative acceleration of the anesthetic vaporizer based on acceleration vectors measured by an accelerometer coupled within the anesthetic vaporizer, and outputting an alert responsive to the quantitative acceleration exceeding an acceleration threshold. In this way, drop-related degradation may be identified in a timely fashion.

A pressure safety device is used with a bag valve mask (BVM) for preventing over-pressurization. The BVM includes a bag assembly having a bag connector for detachably mating to a mask connector on a patient mask. The pressure safety device has a housing with a bag port, a mask fitting, and a flow path from the bag port to the mask fitting. The bag port detachably connects to the bag connector on the BVM, and the mask fitting detachably connects to the mask connector on the BVM. The pressure safety device includes an automatic flow reduction valve located on the flow path in the housing and impedes flow when pressure on a bag connector side of the valve exceeds a maximum threshold value.