Apparatus and method for monitoring nitric oxide delivery
First Claim
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1. An apparatus to deliver therapeutic gas to a patient, the apparatus comprising:
- a first inlet to be placed in fluid communication with a therapeutic gas supply providing a continuous flow of nitric oxide at a therapeutic gas supply concentration;
a second inlet to be placed in fluid communication with a breathing gas delivery system providing a continuous flow of a breathing gas to the patient;
a therapeutic gas injector module to be placed in fluid communication with the first inlet and the second inlet to provide a combined continuous flow of breathing gas and therapeutic gas;
an outlet in fluid communication with the therapeutic gas injector module to supply the combined continuous flow of breathing gas and therapeutic gas to the patient;
a control circuit including a first flow sensor to measure the continuous flow of breathing gas from the breathing gas delivery system and a second flow sensor to measure the continuous flow of therapeutic gas, wherein the control circuit determines a calculated dose of nitric oxide based on the measured flow of breathing gas and either the measured flow of therapeutic gas or a known continuous flow of therapeutic gas; and
a display in communication with the control circuit that provides a visual and/or numeric indication of the calculated dose of nitric oxide, wherein the visual and/or numeric indication of the calculated dose of nitric oxide is provided as a percentage of a desired delivery concentration to be delivered to the patient, wherein the desired delivery concentration is set by a user; and
wherein the visual and/or numeric indication of the calculated dose of nitric oxide as the percentage of the desired delivery concentration is indicated on the display as being in one of a target delivery region, an under-delivery of nitric oxide region, and an over-delivery of nitric oxide region.
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Abstract
Described is an apparatus for monitoring nitric oxide delivery, wherein such apparatus comprises a display that provides a visual and/or numeric indication of the calculated dose of nitric oxide. Also described is a method of monitoring nitric oxide delivery, wherein the breathing gas flow rate and therapeutic gas flow rate are measured and used to determine the calculated dose of nitric oxide, which is then displayed. In some embodiments, an alert is provided when the calculated dose rises above or falls below a predetermined level or range.
33 Citations
19 Claims
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1. An apparatus to deliver therapeutic gas to a patient, the apparatus comprising:
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a first inlet to be placed in fluid communication with a therapeutic gas supply providing a continuous flow of nitric oxide at a therapeutic gas supply concentration; a second inlet to be placed in fluid communication with a breathing gas delivery system providing a continuous flow of a breathing gas to the patient; a therapeutic gas injector module to be placed in fluid communication with the first inlet and the second inlet to provide a combined continuous flow of breathing gas and therapeutic gas; an outlet in fluid communication with the therapeutic gas injector module to supply the combined continuous flow of breathing gas and therapeutic gas to the patient; a control circuit including a first flow sensor to measure the continuous flow of breathing gas from the breathing gas delivery system and a second flow sensor to measure the continuous flow of therapeutic gas, wherein the control circuit determines a calculated dose of nitric oxide based on the measured flow of breathing gas and either the measured flow of therapeutic gas or a known continuous flow of therapeutic gas; and a display in communication with the control circuit that provides a visual and/or numeric indication of the calculated dose of nitric oxide, wherein the visual and/or numeric indication of the calculated dose of nitric oxide is provided as a percentage of a desired delivery concentration to be delivered to the patient, wherein the desired delivery concentration is set by a user; and wherein the visual and/or numeric indication of the calculated dose of nitric oxide as the percentage of the desired delivery concentration is indicated on the display as being in one of a target delivery region, an under-delivery of nitric oxide region, and an over-delivery of nitric oxide region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of monitoring the delivery of therapeutic gas to a patient comprising:
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providing a continuous flow of breathing gas; providing a continuous flow of therapeutic gas comprising nitric oxide; measuring the continuous flow of breathing gas to obtain a measured flow of breathing gas;
measuring the continuous flow of therapeutic gas comprising nitric oxide to obtain a measured flow of therapeutic gas or obtaining a known continuous flow of therapeutic gas;receiving from a user a desired delivery concentration of the therapeutic gas to be delivered to the patient; delivering the breathing gas and therapeutic gas to the patient; determining a calculated dose of nitric oxide based on the measured flow of breathing gas and either the measured flow of therapeutic gas or the known continuous flow of therapeutic gas; and displaying a visual and/or numeric indication of the calculated dose of nitric oxide on a display module, wherein the calculated dose of nitric oxide is provided as a percentage of the desired delivery concentration; wherein the visual and/or numeric indication of the calculated dose of nitric oxide as the percentage of the desired delivery concentration is indicated on the display as being in one of a target delivery region, an under-delivery of nitric oxide region, and an over-delivery of nitric oxide region. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification