Method for use with the pressure triggering of medical ventilators
First Claim
1. A method for providing a reference pressure level for the pressure responsive triggering of a mechanical ventilator to assist a spontaneous breathing effort by a patient, a breathing circuit having a patient connection being interposed between the ventilator and the patient, said method comprising the steps of:
- limiting the gas flow properties of the patient connection;
providing a gas flow through the breathing circuits;
sensing the gas pressure generated in the breathing circuit by the gas flow; and
ascertaining when the gas flow is in an amount sufficient to cause the flow resistance properties of the breathing circuit to generate a desired gas pressure in the breathing circuit suitable for use as a reference pressure level for the pressure responsive triggering action, gas flow in a corresponding amount serving as a bias flow in the breathing circuit in the subsequent operation of the ventilator.
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Accused Products
Abstract
A method for providing a pressure reference level for pressure triggering a ventilator responsive to a spontaneous breathing attempt by a patient. In the method, the patient connection of the breathing circuit is capped or plugged. A gas flow is then provided through the breathing circuit and is altered to an amount that causes the flow resistance properties of the breathing circuit to generate a desired gas pressure in the breathing circuit suitable for use as a reference pressure by the ventilator for pressure responsive triggering. During the operation of the ventilator, gas flow in a corresponding amount serves as a bias flow in the breathing circuit to assist breathing by the patient. The bias flow also generates the reference pressure level in the breathing circuit. A reduction in pressure from the pressure level resulting from inhalation by the patient triggers the operation of the ventilator.
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Citations
7 Claims
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1. A method for providing a reference pressure level for the pressure responsive triggering of a mechanical ventilator to assist a spontaneous breathing effort by a patient, a breathing circuit having a patient connection being interposed between the ventilator and the patient, said method comprising the steps of:
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limiting the gas flow properties of the patient connection;
providing a gas flow through the breathing circuits;
sensing the gas pressure generated in the breathing circuit by the gas flow; and
ascertaining when the gas flow is in an amount sufficient to cause the flow resistance properties of the breathing circuit to generate a desired gas pressure in the breathing circuit suitable for use as a reference pressure level for the pressure responsive triggering action, gas flow in a corresponding amount serving as a bias flow in the breathing circuit in the subsequent operation of the ventilator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification