Abstract:
A humidifier includes: a container (20) to receive water; a heating element (22) formed of a ferrous material; a heating unit including an induction coil and a control circuit. The control circuit applies an alternating current (A-C) current to the coil if a metal inductance of the coil and heating circuit is within a predetermined range, and a gap separating the heating element from the induction coil, wherein the heating element is heated by an electromagnetic coupling with the induction coil.
Abstract:
A mask includes a patient interface and a reminder system provided to the patient interface. The reminder may manifest itself in mechanical, electronic, chemical, and/or electro-mechanical forms, and may be provided to various portions of the patient interface, e.g., mask frame, cushion, hoses, headgear, etc. Moreover, the reminder system may be a stand-alone system, or it may be provided to other portions of the CPAP/PPV apparatus.
Abstract:
A process and apparatus for regeneration of acid and metal from spent acid liquors includes the steps of, optionally, concentrating (110) the liquor to a concentrated liquor or solid, pyrohydrolysing (114) to regenerate the acid and form metal oxide pellets, and reducing the oxide to metal in a two stage reduction reactor (116, 118) using a partially combusted fuel as reducing agent. Also disclosed is a two-stage reduction process and reactor for production of direct reduced iron (DRI) from iron oxide ores or wastes, including a first stage (416) in which the oxide feed is contacted with a fuel and a sub-stoichiometric amount of an oxygen source to produce a lower oxidation state oxide, and a second stage (418) in which the lower oxidation stage oxide is contacted with off-gases from the first stage to produce iron metal.
Abstract:
A tea product adapted for rapid infusion is formed as one or more compressed tea blocks (10) with high surface area to mass ratio - such as a thin wafer (26) or pellets (24) having a surface area of at least 8cm2 per gram of tea - and a section thickness of less than 4mm.
Abstract:
A nasal dilator includes a contact pad (12) attachable to a user's facial region below the user's eye and outboard from the user's nose. A tugging device (14) is coupled with the contact pad and urges the contact pad (12) in a direction away from the user's nose. With this structure, effective dilation of the nasal passages can be achieved in a comfortable manner. The dilator may also be incorporated into a CPAP mask (24) and/or form part of an automated control system (42).
Abstract:
A face mask assembly (FMA) for supplying breathable gas to a wearer. The face mask assembly (FMA) includes a mask frame (112) including a support (120), a facial cushion (16) attached to the mask frame (112), and a forehead support (10A). The forehead support (10A) includes a forehead cushion assembly (50, 52, 54, 122) and an adjustment knob (150) operatively coupled to the forehead cushion assembly (50, 52, 54, 122). The adjustment knob (150) is threadably engaged with the forehead cushion assembly (50, 52, 54, 122) such that turning movement of the adjustment knob (150) causes the mask frame (112) to be moved between retracted and extended positions with respect to the forehead cushion assembly (50, 52, 54, 122).
Abstract:
A washout vent (20) for a mask for use with a system for supplying breathable gas pressurized above atmospheric pressure to an airway of a mammal. The washout vent (20) includes a vent orifice (22) adapted for gas washout. The orifice (22) includes one or more features that contribute to noise reduction, such as a channel (26) with converging walls towards atmosphere, and/or a channel (26) having one or more walls provided with surface treatment and/or contouring, such as roughening and/or scalloped portions.
Abstract:
A patient interface (100) includes a frame (12), a cushion (14), and a reinforcing member (20). The cushion (14) has a non-face-contacting portion (22) connected to the frame (12) and a face-contacting portion (24) adapted to engage the patient's face in use. The face-contacting portion (24) includes a side wall (28) and a flexible membrane (32) extending from the side wall (28). The reinforcing member (20) is provided to at least a portion of an interior and/or exterior surface of the side wall (28) of the cushion (14). The reinforcing member (20) provides reinforcement to the side wall (28) of the cushion (14) to at least limit lateral expansion of the cushion (14) in use. The reinforcing member (20) may have a stiffness that is selectively varied along its length.
Abstract:
A CPAP apparatus has a variable rise time (iii) from a base level of positive air pressure during expiration (EPAP) to a higher level during inspiration (IPAP). The rise time is adjusted in order to reduce obstruction, resistance or instability in the upper airway.
Abstract:
A servoventilator control slowly changes the target ventilation over a period of time, according to a preprogrammed schedule adapted to be set by the physician. Preferably, the target ventilation stays constant at an initial target ventilation for an initial hold time, and then increases at a constant rate until it reaches a final target ventilation, whereupon it stays constant thereafter. If the pressure support level is too high, possibly indicating glottic or upper airway closure, the rate of increase of target ventilation may be lowered or the final target ventilation not reached.