Oxygen flush for anesthesia systems
First Claim
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1. An anesthesia system for providing anesthesia to a patient, the combination comprising;
- a patient circuit adapted to be connected to a patient for delivering and receiving gas from a patient'"'"'s lungs,a valve in communication with said patient circuit, said valve adapted to be opened to vent said patient circuit to an external environment,a ventilator for providing a quantity of gas to said patient circuit for delivery to the patient;
said ventilator having an inhalation mode where the gas is supplied to a patient and an exhalation mode where the gas is received from a patients exhalation;
a supply of oxygen under pressure,a conduit communicating said supply of oxygen with said patient circuit,a control means in said conduit operable by the user to activate the supply of oxygen to enter and flush the patient circuit,means responsive to the activation of said control means to flush said patient circuit to positively open said valve independent of the pressure in the patient circuit to vent said patient circuit and prevent the build up of pressure in said patient circuit.
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Abstract
A system is disclosed to prevent the build up of pressure within a patient circuit when an oxygen flush is activated in a ventilator powered anesthesia system. In the event the user activates the oxygen flush at a time that the ventilator is in the inhalation cycle providing a breath to the patient, a valve is automatically opened to vent the patient circuit to the atmosphere, thereby preventing that additional oxygen flow to the patient circuit from resulting in an undesirable pressure build up that could affect the lungs of the patient.
57 Citations
16 Claims
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1. An anesthesia system for providing anesthesia to a patient, the combination comprising;
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a patient circuit adapted to be connected to a patient for delivering and receiving gas from a patient'"'"'s lungs, a valve in communication with said patient circuit, said valve adapted to be opened to vent said patient circuit to an external environment, a ventilator for providing a quantity of gas to said patient circuit for delivery to the patient;
said ventilator having an inhalation mode where the gas is supplied to a patient and an exhalation mode where the gas is received from a patients exhalation;a supply of oxygen under pressure, a conduit communicating said supply of oxygen with said patient circuit, a control means in said conduit operable by the user to activate the supply of oxygen to enter and flush the patient circuit, means responsive to the activation of said control means to flush said patient circuit to positively open said valve independent of the pressure in the patient circuit to vent said patient circuit and prevent the build up of pressure in said patient circuit. - View Dependent Claims (2, 3, 4)
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5. In an anesthesia system for providing anesthesia to a patient, the combination comprising;
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a patient circuit adapted to be connected to a patient for delivering and receiving gas from a patient'"'"'s lungs, a ventilator for providing a quantity of gas to said patient breathing circuit for delivery to a patient, said ventilator having an inhalation mode where the gas is supplied to a patient and an exhalation mode where the gas is received from a patients exhalation; an exhalation valve in communication with said patient circuit, said exhalation valve venting said patient circuit when said ventilator is in the exhalation mode, a supply of oxygen under pressure, a conduit communicating said supply of oxygen with said patient circuit, a control means in said conduit operable by a user to activate the supply of oxygen to enter and flush the patient circuit, means responsive to the activation of said control means to flush said patient circuit to positively open said valve independent of pressure within said patient circuit to vent said patient circuit and prevent the build up of pressure in said patient circuit. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A method of preventing the build up of excessive pressure within a patient circuit comprising the steps of;
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providing a ventilator for supplying a breath to a patient during the inhalation mode and for allowing the patient to exhale during the exhalation mode; providing a valve in communication with the patient circuit that is openable to vent the patient circuit; providing a supply of oxygen under pressure to the patient circuit; activating the supply of oxygen to the patient circuit to flush the patient circuit as directed by a user; and positively opening the valve to vent the patient circuit independent of the pressure within the patient circuit when the user activates the supply of oxygen to flush the patient circuit. - View Dependent Claims (14, 15, 16)
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Specification