System and method of administering a pharmaceutical gas to a patient
First Claim
1. A pharmaceutical gas delivery system, comprising:
- an inlet to connect to at least one gas source;
an outlet to connect to a device that introduces pharmaceutical gas to a patient;
a first flow valve and a first flow orifice in fluid communication with the inlet and the outlet, wherein the first flow valve and the first flow orifice deliver at a first fixed flow rate;
a second flow valve and a second flow orifice in fluid communication with the inlet and the outlet, wherein the second flow valve and the second flow orifice deliver at a second fixed flow rate that is higher than the first fixed flow rate; and
a delivery control system that delivers the pharmaceutical gas over a plurality of breaths by opening one or more of the first flow valve and the second flow valve, wherein the delivery control system delivers the pharmaceutical gas during at least part of the first half of the patient'"'"'s inspiratory cycle.
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Accused Products
Abstract
A method and system for delivering a pharmaceutical gas to a patient. The method and system provide a known desired quantity of the pharmaceutical gas to the patient independent of the respiratory pattern of the patient. The preferred pharmaceutical gases are CO and NO, both of which are provided as a concentration in a carrier gas. The gas control system determines the delivery of the pharmaceutical gas to the patient to result in the known desired quantity (e.g. in molecules, milligrams or other quantified units) of the pharmaceutical gas being delivered. Upon completion of that known desired quantity of pharmaceutical gas over a plurality of breaths, the system can either terminate any further delivery of the pharmaceutical gas or can activate an alarm to alert the user that the known quantity has been delivered. The system also has alarm functions to alert the user of possible malfunctions of the system.
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Citations
30 Claims
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1. A pharmaceutical gas delivery system, comprising:
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an inlet to connect to at least one gas source; an outlet to connect to a device that introduces pharmaceutical gas to a patient; a first flow valve and a first flow orifice in fluid communication with the inlet and the outlet, wherein the first flow valve and the first flow orifice deliver at a first fixed flow rate; a second flow valve and a second flow orifice in fluid communication with the inlet and the outlet, wherein the second flow valve and the second flow orifice deliver at a second fixed flow rate that is higher than the first fixed flow rate; and a delivery control system that delivers the pharmaceutical gas over a plurality of breaths by opening one or more of the first flow valve and the second flow valve, wherein the delivery control system delivers the pharmaceutical gas during at least part of the first half of the patient'"'"'s inspiratory cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of administering a pharmaceutical gas to a patient, the method comprising:
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providing a gas delivery system having a first flow valve and a first flow orifice and a second flow valve and a second flow orifice, wherein opening the first flow valve delivers the pharmaceutical gas at a first fixed flow rate and opening the second flow valve delivers the pharmaceutical gas at a second fixed flow rate higher than the first flow rate; delivering the pharmaceutical gas over a plurality of breaths to the patient during inspiration by opening one or more of the first flow valve and the second flow valve, wherein the pharmaceutical gas is delivered during at least part of the first half of the patient'"'"'s inspiratory cycle. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification