Portable ventilator system
First Claim
1. A portable ventilator comprising:
- a Roots blower operating in variable speed mode;
a speed servo configured to accelerate and decelerate said Roots blower to provide ventilation to a patient; and
an exhalation servo configured to provide a desired PEEP pressure from an output of said Roots blower.
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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 noise reducing pressure compensating orifices on the Roots blower housing and multiple baffling 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
3 Claims
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1. A portable ventilator comprising:
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a Roots blower operating in variable speed mode;
a speed servo configured to accelerate and decelerate said Roots blower to provide ventilation to a patient; and
an exhalation servo configured to provide a desired PEEP pressure from an output of said Roots blower.
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2. A portable ventilator comprising:
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a Roots blower operating at a substantially constant speed, said Roots blower providing compressed air for ventilating a patient;
an exhalation control servo configured to close an output valve during an exhalation phase; and
a speed servo configured to maintain said Roots blower at said substantially constant speed to provide a desired flow rate.
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3. A portable ventilator system comprising:
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a ventilator housing comprising a Roots blower compressor, said ventilator housing comprising a first user interface and a cradle interface;
a docking cradle having a ventilator interface configured to engage said cradle interface;
a monitor coupled to said docking cradle, said monitor providing a second user interface.
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Specification