Portable ventilator system
7 Assignments
0 Petitions
Accused Products
Abstract
A portable ventilator uses a Roots-type blower as a compressor to reduce both the size and power consumption of the ventilator. Various functional aspects of the ventilator are delegated to multiple subassemblies having dedicated controllers and software that interact with a ventilator processor to provide user interface functions, exhalation control and flow control servos, and monitoring of patient status. The ventilator overcomes noise problems through the use of a noise attenuating system comprising noise reducing pressure compensating orifices on the Roots blower housing and multiple noise reducing chambers. The ventilator is configured with a highly portable form factor, and may be used as a stand-alone device or as a docked device having a docking cradle with enhanced interface and monitoring capabilities.
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Citations
57 Claims
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1-24. -24. (canceled)
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25. A portable ventilator comprising:
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a Roots blower being operable in variable speed mode;
a speed servo configured to accelerate and decelerate the Roots blower to provide ventilation to a patient; and
an exhalation servo control system configured to provide a desired positive end expiratory pressure (PEEP) from an output of the Roots blower.
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26. A portable ventilator comprising:
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a Roots blower being operable at a substantially constant speed and configured to provide compressed air for ventilating a patient;
a speed servo configured to maintain the Roots blower at the substantially constant speed to provide a desired flow rate; and
an exhalation servo control system configured to close an output valve during an exhalation phase of patient ventilation.
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27. A portable ventilator comprising:
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a ventilator housing having a Roots blower, the ventilator housing comprising a first user interface and a cradle interface;
a docking cradle having a ventilator interface configured to engage the cradle interface; and
a monitor coupled to the docking cradle, the monitor providing a second user interface. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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34. A portable ventilator comprising:
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a Roots blower for providing gas flow to a patient;
a noise attenuation system for reducing noise generated by the Roots blower. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A portable ventilator comprising:
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a Roots blower for providing gas flow to a patient;
at least one of a blower module, a transducer module, an exhalation control module and a blender module. - View Dependent Claims (57)
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Specification