Tidal volume display
First Claim
1. A method of indicating the volume of gas supplied to a patient, comprising the steps of:
- A. supplying a flow of gas under pressure to a patient from a supply of gas,B. providing a fixed volume chamber operatively coupled to said supply of gas to receive another flow of said gas therein,C. controlling said flows of said gas to the patient and to said chamber on an intermittent basis generally coinciding with the inhalation and exhalation periods of the patient, and proportioning said flows, so as to obtain proportional flows of said gas to the patient and into said chamber concurrently during the inhalation period and a venting of said supply of gas and said chamber concurrently to an initial pressure during the exhalation period, andD. gauging the increase of pressure over said initial pressure in said chamber during each inhalation period so as to obtain a measurement of the tidal volume provided to the patient during each inhalation period.
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Accused Products
Abstract
A breath volume indicating system has a regulator controlling the flow of gas from a source of gas under pressure to a supply system delivering the gas under pressure to a patient as well as to a chamber providing a fixed volume to receive a supply of the gas. The regulator includes two valves respectively operatively associated with the supply system and the chamber, each valve being operable simultaneously between closed and open positions. In the closed position of the valves, generally coinciding with an inhalation period of the patient, the regulator provides a flow of the gas to the patient through the supply system and into the chamber, concurrently, and, in the open position, generally coinciding with the exhalation period of the patient venting of the supply system (and thereby the patient) and the chamber, concurrently. The regulator further includes gas flow control orifices such that a gauge operatively connected to the chamber indicates a tidal volume that is directly equivalent of the volume of the gas directed to the patient through the supply system during the patient'"'"'s inhalation period when the valves are closed.
26 Citations
44 Claims
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1. A method of indicating the volume of gas supplied to a patient, comprising the steps of:
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A. supplying a flow of gas under pressure to a patient from a supply of gas, B. providing a fixed volume chamber operatively coupled to said supply of gas to receive another flow of said gas therein, C. controlling said flows of said gas to the patient and to said chamber on an intermittent basis generally coinciding with the inhalation and exhalation periods of the patient, and proportioning said flows, so as to obtain proportional flows of said gas to the patient and into said chamber concurrently during the inhalation period and a venting of said supply of gas and said chamber concurrently to an initial pressure during the exhalation period, and D. gauging the increase of pressure over said initial pressure in said chamber during each inhalation period so as to obtain a measurement of the tidal volume provided to the patient during each inhalation period. - View Dependent Claims (2, 3, 4)
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5. A method of indicating the volume of gas supplied to a patient, comprising the steps of:
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A. regulating the flow of gas from a supply of gas under pressure, B. supplying a flow of said gas to the patient from said regulated supply of gas, C. providing a fixed volume chamber operatively coupled to said regulated supply of gas to receive another flow of said gas from said supply of said gas therein, D. proportioning said flows of said regulated supply of gas to the patient and to said chamber, E. controlling said flows of said regulated supply of gas to the patient and to said chamber on an intermittent basis generally conciding with the inhalation and exhalation periods fo the patient, so as to obtain said flows of said regulated supply of gas to the patient and said chamber concurrently during the inhalation period and a venting of said regulated supply of gas and said chamber to atmosphere concurrently during the exhalation period, and F. gauging the increase of pressure in said chamber during each inhalation period so as to obtain a measurement of the tidal volume provided to the patient during each inhalation period. - View Dependent Claims (6)
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7. The method of indicating the tidal volume of gas directed to a patient per inhalation period, comprising the steps of:
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A. concurrently supplying a gas proportionally to a patient and to a satellite lung during each inhalation period, said satellite lung having a predetermined fixed volume and initial internal pressure, and B. converting the increase of pressure over said initial internal pressure in said satellite lung during said inhalation period to a visual indication corresponding to the tidal volume of said gas directed to the patient in an inhalation period. - View Dependent Claims (8, 9)
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10. A breath volume indicating device comprising:
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A. supply means for delivery of gas under pressure to a patient, B. chamber means operatively associated with said supply means and providing a fixed volume for receiving a supply of said gas therein proportional to that delivered to said patient, C. valve means operatively associated with said supply means and said chamber means and operable between closed and open positions for obtaining while said valve means is in said closed position which generally coincides with an inhalation period of the patient flows of said gas to the patient and into said chamber means concurrently, and while said valve means is in said open position which generally coincides with an exhalation period of the patient venting of said supply means and said chamber means concurrently to an initial pressure, and D. gauge means operatively connected to said chamber means for responding to the increase in pressure from said initial pressure in said chamber means while said valve means is in said closed position such that a tidal volume is indicated on said gauge means that is directed related to the volume of said gas delivered to the patient while said valve means is in said closed position. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A breathing volume indicating system comprising:
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A. regulating means for controlling the flow of a gas from a source of said gas under pressure, B. supply means operatively coupled to said regulating means for delivering said gas under pressure to a patient, C. chamber means operatively coupled to said regulating means and providing a fixed volume for receiving a supply of said gas therein proportional to that delivered to the patient, D. valve means operatively associated with said supply means and said chamber means and operable between closed and open positions for obtaining while said valve means is in said closed position which generally coincides with each inhalation period of the patient flows of said gas to the patient and into said chamber means concurrently, and while said valve means is in said open position which generally coincides with each exhalation period of the patient venting of said supply means and said chamber means concurrently to atmosphere, and E. gauge means operatively connected to said chamber means for responding to the increase in pressure from atmosphere in said chamber means while said valve means is in said closed position such that a tidal volume is indicated on said gauge means that is directly equivalent of the volume of said gas delivered to the patient through said supply means while said valve means is in said closed position. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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34. A breathing volume indicating system comprising:
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A. regulating means for controlling the flow of a gas from a source of said gas under pressure, B. supply means operatively coupled to said regulating means for delivering said gas under pressure to a patient, C. chamber means operatively coupled to said regulating means and providing a fixed volume for receiving a supply of said gas therein, D. flow orifice means in operative relation to said regulating means, said supply means and said chamber means for providing proportional flows of said gas to said supply means and said chamber means from said regulating means, E. valve means operatively associated with said supply means and said chamber means and operable between closed and open positions for obtaining while said valve means is in said closed position which generally coincides with each inhalation period of the patient flows of said gas to the patient and into said chamber means concurrently, and while said valve means is in said open position which generally coincides with each exhalation period of the patient venting of said supply means and said chamber means means concurrently to atmospheric pressure, F. programming means operatively associated with said valve means for obtaining periodic movement of said valve means between said open position and said closed position in periods generally coinciding with said inhalation and exhalation periods of the patient, and G. gauge means operatively connected to said chamber means and responsive to the increase pressure in said chamber means over said atmospheric pressure while said valve means is in said closed position for indicating a tidal volume that is directly equivalent of the volume of said gas delivered to the patient through said supply means while said valve means is in said closed position. - View Dependent Claims (35, 36, 37, 38, 39)
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40. Apparatus for indicating the tidal volume of gas delivered to a patient per inhalation period, comprising:
a satellite lung having a pre-determined fixed volume and initial internal pressure, means for concurrently supplying gas to a patient and to said satellite lung during an inhalation period of the patient, and means for converting the pressure increase over said initial internal pressure in said satellite lung during said inhalation period into a visual indication corresponding to the tidal volume of said gas supplied to the patient in said inhalation period. - View Dependent Claims (41, 42, 43, 44)
Specification