# US 2010/0168671 A1 · Method and Apparatus for Pressure Infusion and Temperature Control of Infused Liquids > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0168671 A1 - Document ID: US20100168671A1 - Status: Published application - Kind: A1 - Application number: 12/683,819 - Filed: 2010-01-07 - Published: 2010-07-01 - Earliest claimed: 1997-03-03 - Assignees: Medical Solutions, Inc. - Inventors: Durward I. Faries, JR.; Bruce Heymann; Calvin Blankenship; George T. DuBose, JR. - Web page: https://patentgrep.com/patent/US20100168671A1 ## CPC - A61M 5/148: flexible (A61M5/155 takes precedence) - A61M 5/1483: {using flexible bags externally pressurised by fluid pressure} - A61M 5/44: having means for cooling or heating the devices or media - A61M 5/445: {the media being heated in the reservoir, e.g. warming bloodbags} - A61M 5/1424: {Manually operated pumps} - A61M 5/1689: {Drip counters} - A61M 5/172: electrical or electronic - A61M 2205/3368: Temperature - A61M 2205/3653: by Joule effect, i.e. electric resistance - A61M 2209/04: Tools for specific apparatus - 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 A method and apparatus for pressure infusion and temperature control of infused liquids includes a receptacle for receiving a liquid-filled bag containing intravenous solution or other liquid and an inflatable pressure device. The inflatable pressure device is disposed within a pressure device bag and is positioned proximate the liquid-filled bag in the receptacle. The inflatable pressure device expands within the pressure device bag upon inflation and exerts pressure on the liquid-filled bag. A heating element may be disposed on the inflatable pressure device bag to heat the liquid-filled bag to a desired temperature. The liquid may alternatively be maintained at a desired temperature, while flowing to a patient via a heating assembly disposed along a tube. The heating assembly includes a sleeve having a slot for receiving the tube and a plurality of individually controlled heaters. An infrared sensing device is mounted proximate a drip chamber to ascertain a drip count, while a temperature sensor is disposed within a holder that is positioned toward the entry site on a patient. A heat controller controls the heaters based on a drip count, while a safety controller disables heater operation in response to liquid temperature exceeding the desired temperature. Thus, the safety controller and heat controller, in combination, control the heating assembly heaters based on liquid temperature and flow rate, respectively. Alternatively, the liquid-filled bag may be heated to a desired temperature whereby the heating assembly includes a single heater controlled by a controller to maintain the liquid at the desired temperature during infusion of the liquid into a patient. ## Claims ### Claim at position 1 1-40. (canceled) ### Claim 41 An apparatus for maintaining temperature of infused liquids flowing from a liquid-filled container through a tube to an entry site on a patient, wherein said tube extends between said liquid-filled container and said entry site, said apparatus comprising: a heating assembly including: a flexible body placeable along said tube and including a receptacle configured to engage and receive a portion of said tube therein; and at least one heater disposed and arranged within said body to heat liquid within said received tube portion to a desired temperature; a temperature sensor to measure temperature of said liquid; and a controller to control said at least one heater to heat said liquid to said desired temperature, wherein said controller includes a display device to display at least one of said measured temperature of said liquid and said desired temperature. ### Claim 42 (depends on 41) The apparatus of claim 41, wherein at least one heater includes an electric heater. ### Claim 43 (depends on 41) The apparatus of claim 41, wherein said controller includes input devices to enable entry of said desired temperature. ### Claim 44 (depends on 41) The apparatus of claim 41, wherein said controller includes an alarm to indicate liquid temperatures. ### Claim 45 (depends on 44) The apparatus of claim 44, wherein said alarm indicates at least one of high and low temperature measurements. ### Claim 46 (depends on 41) The apparatus of claim 41, further including: a safety controller to disable said at least one heater in response to said measured temperature exceeding a temperature threshold. ### Claim 47 A method for maintaining temperature of infused liquids flowing from a liquid-filled container through a tube to an entry site on a patient via a heating assembly including a flexible body placeable along said tube and including a receptacle, at least one heater, a temperature sensor, and a controller, wherein said tube extends between said liquid-filled container and said entry site, said method comprising: (a) engaging and receiving a portion of said tube within said receptacle of said flexible body; (b) heating said liquid within said received tube portion to a desired temperature via said at least one heater disposed and arranged within said body to heat said received tube portion; (c) measuring temperature of said liquid via said temperature sensor; and (d) controlling said at least one heater to heat said liquid to said desired temperature via said controller, and displaying at least one of said measured temperature of said liquid and said desired temperature on a display device of said controller. ### Claim 48 (depends on 47) The method of claim 47, wherein at least one heater includes an electric heater. ### Claim 49 (depends on 47) The method of claim 47, wherein said controller includes input devices, and step (d) further includes: (d.1) facilitating entry of said desired temperature via said input devices. ### Claim 50 (depends on 47) The method of claim 47, wherein said controller includes an alarm, and step (d) further includes: (d.1) indicating liquid temperatures via said alarm. ### Claim 51 (depends on 50) The method of claim 50, wherein step (d.1) further includes: (d.1.1) indicating at least one of high and low temperature measurements via said alarm. ### Claim 52 (depends on 47) The method of claim 47, further including: (e) disabling said at least one heater in response to said measured temperature exceeding a temperature threshold via a safety controller.