Abstract:
A headgear for use with a mask includes a first strap (660) being configured to engage a back of a patient's head and extend on either side of the patient's parietal bone behind the patient's ears and assume, in use, a substantially circular or oval shape. At least a portion of the first strap is substantially inextensible. The headgear also includes at least one second strap (620, 630) configured to removably connect the first strap to the mask. The second strap may be more extensible than the first strap. At least a portion of the first strap is self-supporting such that the headgear maintains a three dimensional shape when not in use. The substantially inextensible portion of the first strap is constructed to resiliently return to a predetermined shape when not in use. The arcuate region includes a first portion that may be arranged to align substantially parallel with a top of the patient's head and a second portion being arranged to align substantially to a rear surface of the patient's head.
Abstract:
An over-pressure control device prevents over-pressure conditions during the delivery of pressure treatment therapy to a patient with a respiratory treatment apparatus. The device may prevent delivered pressure from exceeding a first maximum pressure threshold. The device may also prevent the delivered pressure from exceeding a second maximum pressure threshold when the delivered pressure exceeds another pressure threshold for a period of time. In some embodiments, the second maximum pressure threshold may be lower than the first maximum pressure threshold. In an example embodiment, a set of comparators are configured to compare pressure with a maximum pressure threshold and to control a reduction in the pressure if the pressure exceeds the maximum pressure threshold. The set may also be configured to compare the pressure with a pressure threshold and to control reduction in the maximum pressure threshold if the pressure exceeds the pressure threshold for a period of time.
Abstract:
An apparatus for delivering a flow of breathable gas to a patient for the treatment of Sleep Disordered Breathing (SDB) that is less obtrusive includes a nasal cannula, cannulae (2a, 2b), prongs, or pillows and may be sealed or unsealed with the nares of the patient in use. The cannula, pillows or prongs may be positioned on the face of the patient by a headgear (6). The cannula, pillows or prongs may be smaller, lighter, and/or less visible than other nasal cannula, cannulae, pillows or prongs and may therefore be less obtrusive to the patient.
Abstract:
A demand valve (10) for a breathing apparatus includes a housing (20), a valve assembly (30), and a diaphragm (40) coupled to the valve assembly (30). The housing (20) defines a chamber (22) and includes a demand port (24) adapted to be in fluid communication with the entrance of a patient's airways, an inlet port (26) adapted to be in fluid communication with a supply of breathable gas at a positive pressure, and an exhaust port (28) adapted to allow gas to exit the housing (20). The valve assembly (30) includes an inlet valve (52) adapted to at least partially close the inlet port (26) and an exhaust valve (54) adapted to at least partially close the exhaust port (28). The diaphragm (40) is constructed and arranged to be responsive to pressure within the chamber (22) in order to effect movement of the valve assembly (30) to selectively close the inlet and exhaust ports (26, 28).
Abstract:
A nasal or full-face mask frame (20) includes a main body (65) and a vent assembly (30) provided to the main body (65). The vent assembly (65) includes a plurality of holes (35) arranged in at least one column. The holes (35) are positioned on a relatively flat and/or non-recessed portion (22) of the main body (65).
Abstract:
A flexible tape heater (110) in a patient conduit (112) may be used to heat the flow of gas in the patient conduit (112) that is delivered to the patient mask (116). The thin, flat and extended nature of the flexible tape heater (110) may enhance heat transfer with the gas flow whilst also providing low impedance to the gas flow. Heating of the gas may facilitate the desired temperature and humidity to be reached for the gas delivered to the patient by the respiratory apparatus. The flexible tape heater (110) may be placed in the patient conduit (112) such that the flexible tape heater (110) is twisted or bent about one or more of the flexible tape heater's (110) three axes. Additionally these configurations may be used to enhance the turbulent mixing of the water vapour produced in the humidification chamber (114) with the gas flow.
Abstract:
A mouth cushion (20) for a mask system includes a side wall (50), an undercushion (52) extending away from the side wall (50), and a membrane (54) provided to substantially surround the undercushion (52) and adapted to form a continuous seal around an exterior of a patient's mouth in use. The side wall (50) includes spaced-apart prong support structures (60) that provide annular recesses (62) adapted to support respective nasal prongs (30). Each prong support structure (60) includes an alignment indicator (70) to aid correct assembly of the respective nasal prong (30).
Abstract:
A forehead support (12) for a mask assembly (10) includes a frame connector (20) provided to a mask frame (14), a forehead cushion support (60) movably mounted to the frame connector (20) for generally linear movement between retracted and extended positions with respect to the frame connector (20), and an adjustment knob (40) movably mounted to the frame connector (40) and threadably engaged with the forehead cushion support (60) such that turning movement of the adjustment knob (40) causes the forehead cushion support (60) to be moved between the retracted and extended positions. The adjustment knob (40) includes a resilient prong (54) having a ratchet bump (56). The ratchet bump (56) is adapted to selectively engage a series of ridges (26) provided to the frame connector (20) to provide indexed incremental adjustment.
Abstract:
Systems and/or methods for treating sleep-disordered breathing (SDB) are provided. In particular, systems and/or methods are provided that include software systems for use with auto-titrating devices (e.g. APAP devices) that reduce and/or eliminate the need to calibrate the auto-titrating devices. The software system also may reduce and/or eliminate the need for certain sensors used in such calibrations. Certain example embodiments compute snore based on noises measured during expiration and inspiration, and certain example embodiments set patient leak utilizing the vent flow level. Certain example embodiments change treatment pressure thresholds after measuring patient improvement by monitoring a variable correlated with actual delivery pressure in accordance with an example embodiment, and certain example embodiments provide pressure according to motor speed in accordance with an example embodiment.
Abstract:
An air delivery conduit for conveying breathable gas from a positive airway pressure device to a patient interface includes a tubular wall structure constructed from a textile material. A reinforcing structure may be provided to the wall structure that is structured to prevent kinking or collapsing of the wall structure. The wall structure may include a warp having a plurality of lengthwise textile warp threads arranged in a circle and a weft having a textile weft thread that is woven through the warp threads.