# US 5,706,801 A · Sensing and communications system for use with oxygen delivery apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,706,801 A - Document ID: US5706801A - Status: Granted - Kind: A - Application number: 08/508,980 - Filed: 1995-07-28 - Granted: 1998-01-13 - Earliest claimed: 1995-07-28 - Assignees: Caire Inc. - Inventors: Scott Remes; Larry Heyl; Dick Middleton - Web page: https://patentgrep.com/patent/US5706801A ## CPC - A61M 16/0672: {Nasal cannula assemblies for oxygen therapy} - A61M 16/0051: {with alarm devices} - A61M 16/021: {operated by electrical means (A61M16/202 – A61M16/205 take precedence)} - A61M 16/101: {using an oxygen concentrator} - A61M 2202/0208: Oxygen - A61M 2202/03: Gases in liquid phase, e.g. cryogenic liquids - A61M 2205/3389: Continuous level detection (A61M2205/3393 takes precedence) - A61M 2205/52: with memories providing a history of measured variating parameters of apparatus or patient - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract An oxygen delivery apparatus is used to supply oxygen-enriched air to a patient via a diffuser. A communication module containing an in-line flowmeter and oxygen concentration sensor is provided to measure the flow rate and oxygen concentration of the oxygen-enriched supplied to the patient. The length of a therapy session is also measured. The measured information is stored and periodically transmitted via a communication module including an internal modem to a remote computer system. The remote computer system includes a program that manipulates and stores the data transmitted from the module. Analysis of the data reveals the operational status of the oxygen delivery apparatus and whether the patient is complying with a prescribed regimen of use. The communication modules for a number of users in a given geographic can be monitored for efficient servicing. ## Claims ### Claim 1 A sensing and communications system for use with an oxygen delivery apparatus which delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising: a) means for measuring a session length during which said oxygen-enriched air is continuously supplied to said patient and measuring data related to the delivered flow rate of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the measured session; b) means for transmitting said measured delivered flow rate data and session length data to a remote location; and c) means, at said remote location, for storing information specifying a prescribed regimen of use for said patient including session length and delivered flow rate information, for receiving the transmitted data and comparing it to the prescribed session length and delivered flow rate information to determine patient and oxygen delivery apparatus compliance with the prescribed regimen of use. ### Claim 2 (depends on 1) The sensing and communications system of claim 1 wherein said measuring means includes a restricted orifice in circuit with said delivery apparatus and a sensor for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice. ### Claim 3 (depends on 1) The sensing and communications system of claim 1 wherein said measuring means includes a conduit in circuit with said delivery apparatus and a sensor positioned therein for generating a signal which is related to said flow rate by measuring the temperature of said sensor. ### Claim 4 (depends on 1) The sensing and communications system of claim 1 wherein said measuring means includes clock means for measuring said session length. ### Claim 5 (depends on 4) The sensing and communications system of claim 4 wherein said flow rate and said session length data are periodically transmitted to said remote means, such data being stored in a memory prior to transmission. ### Claim 6 (depends on 5) The sensing and communications system of claim 5 wherein said measuring means further includes means for measuring data related to the oxygen concentration of said oxygen-enriched air supplied to said patient at one or more times during the measured session, such oxygen concentration data being stored in said memory and periodically transmitted to said remote means. ### Claim 7 (depends on 1) The sensing and communications system of claim 1 wherein said remote means includes means for displaying a comparison of said prescribed regimen with the transmitted data to provide an indication of whether the patient and oxygen delivery apparatus are complying with said prescribed regimen. ### Claim 8 (depends on 1) The sensing and communications system of claim 1 wherein said remote means includes a memory for storing the transmitted data for multiple sessions and means for determining whether said oxygen delivery apparatus is trending toward failure based on a comparison of current data with stored data. ### Claim 9 (depends on 1) The sensing and communications system of claim 1 wherein said oxygen delivery apparatus is a liquid delivery system. ### Claim 10 (depends on 1) The sensing and communications system of claim 1 wherein said oxygen delivery apparatus is an oxygen concentrator. ### Claim 11 (depends on 1) The sensing and communications system of claim 1 further comprising means for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means. ### Claim 12 A sensing and communications system for use with an oxygen delivery apparatus which delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising: a) means for measuring data related to the oxygen concentration and delivered flow rate of oxygen-enriched air continuously supplied to said patient during use of said oxygen delivery apparatus; b) means for periodically transmitting said oxygen concentration and delivered flow rate data to a remote location; and c) means, at said remote location, for receiving, storing and analyzing said periodically transmitted data to determine the current operational status of said oxygen delivery apparatus and for predicting whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data. ### Claim 13 (depends on 12) The sensing and communications system of claim 12 wherein said measuring means includes a memory in which said delivered flow rate and oxygen concentration data are stored, said stored data being periodically transmitted to said remote means. ### Claim 14 (depends on 13) The sensing and communications system of claim 13 further including processor means for measuring a time to acceptable concentration (TAC), said TAC value being periodically stored in said memory and transmitted to said remote means. ### Claim 15 (depends on 13) The sensing and communications system of claim 13 wherein said means for measuring includes processor means for periodically determining high, low and average flow rates and oxygen concentrations of said oxygen-enriched air supplied to said patient, such data being stored in said memory and periodically transmitted to said remote means. ### Claim 16 (depends on 12) The sensing and communications system of claim 12 wherein said measuring means includes a restricted orifice in circuit with said delivery apparatus and a sensor for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice. ### Claim 17 (depends on 12) The sensing and communications system of claim 12 wherein said measuring means includes a conduit in circuit with said delivering apparatus and a sensor positioned therein for generating a signal which is related to said flow rate by measuring the temperature of said sensor. ### Claim 18 (depends on 12) The sensing and communications system of claim 12 further comprising means for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means. ### Claim 19 (depends on 12) The sensing and communications system of claim 12 wherein said oxygen delivery apparatus is an oxygen concentrator. ### Claim 20 A sensing and communications system for use with a plurality of oxygen delivery apparatus each of which delivers oxygen-enriched air to a patient, comprising: a) a plurality of sensing and communications modules for use with said home oxygen delivery apparatus, each of said modules including: i) means for measuring a session length during which oxygen-enriched air is continuously supplied to said patient and measuring data related to the delivered flow rate and oxygen concentration of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the session, and ii) means for periodically transmitting said flow rate, oxygen concentration and session length data to a remote location; and b) means, at said remote location, for storing for each oxygen delivery apparatus, patient information specifying a prescribed regimen of use including session length, delivered flow rate and oxygen concentration information, for receiving and storing the transmitted data and for: i) comparing the transmitted flow rate and session length data to prescribed flow rate and session length data to determine patient compliance with a prescribed regimen of use, and ii) analyzing said periodically transmitted flow rate and oxygen concentration data to determine both the current operational status of said oxygen delivery apparatus and for predicting whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data. ### Claim 21 A sensing and communications system for use with an oxygen delivery apparatus that delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising: a) a clock for measuring a session length during which said oxygen-enriched air is continuously supplied to said patient and a flow sensor for measuring data related to the delivered flow rate of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the session; b) a transmitter for sending said delivered flow rate data and measured session length to a remote location; and c) a data processor at said remote location for storing information specifying a prescribed regimen of use for said patient including session length and flow rate information, for receiving the sensed flow rate data and measured session length and comparing it to the prescribed session length and flow rate information to determine patient and oxygen delivery apparatus compliance with the prescribed regimen of use. ### Claim 22 (depends on 21) The sensing and communications system of claim 21 wherein said flow sensor includes a restricted orifice in circuit with said delivery apparatus and a pressure sensitive device for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice. ### Claim 23 (depends on 21) The sensing and communications system of claim 21 wherein said flow sensor includes a conduit in circuit with said delivery apparatus and a temperature sensitive device positioned therein for generating a signal which is related to said flow rate by measuring the temperature of oxygen-enriched air in the conduit. ### Claim 24 (depends on 21) The sensing and communications system of claim 21 wherein said clock includes a microprocessor clock means for measuring said session length. ### Claim 25 (depends on 24) The sensing and communications system of claim 24 wherein said flow rate and said session length data are periodically transmitted to said remote means, such data being stored in a memory prior to transmission. ### Claim 26 (depends on 25) The sensing and communications system of claim 25 further comprising an oxygen sensor for measuring data related to the oxygen concentration of said oxygen-enriched air supplied to said patient, such oxygen concentration data being stored in said memory and periodically transmitted to said remote means. ### Claim 27 (depends on 21) The sensing and communications system of claim 21 wherein said remote data processor includes means for displaying a comparison of said prescribed regimen with the transmitted data to provide an indication of whether the patient is complying with said prescribed regimen. ### Claim 28 (depends on 21) The sensing and communications system of claim 21 wherein said remote data processor includes a memory for storing the transmitted data and means for predicting whether said oxygen delivery apparatus is trending toward failure based on a comparison of current data with stored data. ### Claim 29 (depends on 21) The sensing and communications system of claim 21 wherein said oxygen delivery apparatus is a liquid delivery system. ### Claim 30 (depends on 21) The sensing and communications system of claim 21 wherein said oxygen delivery apparatus is an oxygen concentrator. ### Claim 31 (depends on 21) The sensing and communications system of claim 21 further comprising means for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means. ### Claim 32 A sensing and communications system for use with an oxygen delivery apparatus that delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising: a) sensors for measuring data related to the delivered flow rate and oxygen concentration of oxygen-enriched air continuously supplied to said patient from said oxygen delivery apparatus; b) a transmitter for periodically transmitting said delivered flow rate and oxygen concentration data to a remote location; and c) a computer at said remote location, for receiving, storing and analyzing said periodically transmitted data to determine the current operational status of said home oxygen delivery apparatus and to predict whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data. ### Claim 33 (depends on 32) The sensing and communications system of claim 32 further including a memory in which said delivered flow rate and oxygen concentration data are stored, said stored data being periodically transmitted to said remote computer. ### Claim 34 (depends on 33) The sensing and communications system of claim 33 further including a processor for measuring a time to acceptable concentration (TAC), said TAC value being periodically stored in said memory and transmitted to said remote computer. ### Claim 35 (depends on 33) The sensing and communications system of claim 33 further including a processor for periodically determining high, low and average flow rates and oxygen concentrations of said oxygen-enriched air supplied to said patient, such data being stored in said memory and periodically transmitted to said remote computer. ### Claim 36 (depends on 32) The sensing and communications system of claim 32 wherein said sensors include a restricted orifice in circuit with said delivery apparatus and a pressure sensitive device for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice. ### Claim 37 (depends on 32) The sensing and communications system of claim 32 wherein said sensors include a conduit in circuit with said delivery apparatus and a temperature sensitive device positioned therein for generating a signal which is related to said flow rate by measuring the temperature of said sensor. ### Claim 38 (depends on 32) The sensing and communications system of claim 32 further comprising a processor for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means. ### Claim 39 (depends on 32) The sensing and communications system of claim 32 wherein said oxygen delivery apparatus is an oxygen concentrator. ### Claim 40 A method for remote compliance monitoring of use of an oxygen delivery apparatus that delivers oxygen-enriched air to a patient, comprising: a) measuring a session length during which said oxygen-enriched air is continuously supplied to said patient; b) sensing data related to the delivered flow rate of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the measured session; c) transmitting said sensed flow rate data and measured session length to a remote location; d) storing at said remote location information specifying a prescribed regimen of use for said patient including session length and flow rate information; and e) receiving at said remote location the sensed flow rate data and measured session length and comparing it to the prescribed session length and flow rate information to determine patient and oxygen delivery apparatus compliance with the prescribed regimen of use. ### Claim 41 A method for remote compliance monitoring of use of an oxygen delivery apparatus that delivers oxygen-enriched air to a patient, comprising: a) measuring data related to the delivered flow rate and oxygen concentration of oxygen-enriched air continuously supplied to said patient from said oxygen delivery apparatus; b) periodically transmitting said delivered flow rate and oxygen concentration data to a remote location; and c) receiving, storing and analyzing in a computer at said remote location said periodically transmitted data to determine both the current operational status of said oxygen delivery apparatus and for predicting whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data.