Portable ventilator system
First Claim
1. A portable ventilator comprising:
- a ROOTS-type blower having interlocking lobed impellers counter-rotatable within a blower housing in variable speed mode;
a speed servo configured to accelerate and decelerate the ROOTS-type 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 said ROOTS-type 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-type 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
11 Claims
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1. A portable ventilator comprising:
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a ROOTS-type blower having interlocking lobed impellers counter-rotatable within a blower housing in variable speed mode; a speed servo configured to accelerate and decelerate the ROOTS-type 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 said ROOTS-type blower. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A portable ventilator comprising:
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a ROOTS-type blower having interlocking lobed impellers counter-rotatable within a blower housing at a substantially constant speed, said ROOTS-type blower providing compressed air for ventilating a patient; a speed servo configured to maintain the ROOTS-type 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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10. A portable ventilator comprising:
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a ROOTS-type blower having interlocking lobed impellers counter-rotatable within a blower housing 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 (11)
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Specification