Method and Apparatus for Pressure Infusion and Temperature Control of Infused Liquids
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Accused Products
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.
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Citations
52 Claims
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1-40. -40. (canceled)
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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:
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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. - View Dependent Claims (42, 43, 44, 45, 46)
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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:
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(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. - View Dependent Claims (48, 49, 50, 51, 52)
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Specification