High frequency ventilation
First Claim
1. A method of ventilating a patient comprising:
- simultaneously delivering a flow of gas to both the first and the second sides of a piston which is diaphragmatically sealed in an oscillator;
directing the flow of gas delivered to said first side of said piston through a means for moving said piston back and forth within said oscillator, thereby cooling said oscillator;
moving said piston a selected distance back and forth within said oscillator, thereby creating a polar pressure wave in said flow of gas delivered to said second side of said piston;
directing the flow of gas delivered to said second side of said piston into the lungs of a patient; and
venting the flow of atmosphere directed into the lungs of the patient to the atmosphere.
2 Assignments
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Accused Products
Abstract
A high frequency oscillating ventilator. A flow of gas is conducted from a gas source to a high frequency oscillator. The high frequency oscillator comprises a housing including a magnet and having a diaphragmetically sealed piston mounted therein, an inlet connecting the space within the housing on the first side of the diaphragm to the gas conducting means, and a coil mounted to the first side of the diaphragm. Circuitry is provided which is operable to reverse the polarity of the flow of the current in the coil, thereby causing the diaphragm to move back and forth within the housing. A tube connecting the space on the second side of the diaphragm to the gas source and the patient'"'"'s airway is provided. Also disclosed is a method of ventilating a patient with the high frequency oscillating ventilator, and a double lumen endotracheal tube for use in connection therewith.
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Citations
10 Claims
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1. A method of ventilating a patient comprising:
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simultaneously delivering a flow of gas to both the first and the second sides of a piston which is diaphragmatically sealed in an oscillator; directing the flow of gas delivered to said first side of said piston through a means for moving said piston back and forth within said oscillator, thereby cooling said oscillator; moving said piston a selected distance back and forth within said oscillator, thereby creating a polar pressure wave in said flow of gas delivered to said second side of said piston; directing the flow of gas delivered to said second side of said piston into the lungs of a patient; and venting the flow of atmosphere directed into the lungs of the patient to the atmosphere. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification