Method and apparatus for pressure infusion and temperature control of infused liquids
First Claim
1. An apparatus for heating and maintaining the temperature of infused liquids as liquid flows from a heated liquid-filled container through a tube to an entry site on a patient, wherein said liquid-filled container is suspended from a support by a receptacle and said tube extends from said liquid-filled container to said entry site, said apparatus comprising:
- a receptacle for receiving and holding a liquid filled container;
a heating element in said receptacle, the heating element placeable proximate said liquid-filled container to heat said liquid-filled container to a desired temperature;
a heating assembly selectively placeable along said tube, said heating assembly including;
a heater to maintain liquid flowing from said heated liquid-filled container through said tube at said desired temperature,a tube receptacle comprising an open slot configured to engage and receive a portion of said tube therein,wherein said heater heats said liquid within said tube portion received within the open slot; and
a control unit coupled to said heating element and said heater to control heating of said liquid, wherein said heating element is controlled based on a measured heating element parameter, and said heater is controlled independently of said heating element based on a measured heater parameter.
0 Assignments
0 Petitions
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.
429 Citations
14 Claims
-
1. An apparatus for heating and maintaining the temperature of infused liquids as liquid flows from a heated liquid-filled container through a tube to an entry site on a patient, wherein said liquid-filled container is suspended from a support by a receptacle and said tube extends from said liquid-filled container to said entry site, said apparatus comprising:
-
a receptacle for receiving and holding a liquid filled container; a heating element in said receptacle, the heating element placeable proximate said liquid-filled container to heat said liquid-filled container to a desired temperature; a heating assembly selectively placeable along said tube, said heating assembly including; a heater to maintain liquid flowing from said heated liquid-filled container through said tube at said desired temperature, a tube receptacle comprising an open slot configured to engage and receive a portion of said tube therein, wherein said heater heats said liquid within said tube portion received within the open slot; and a control unit coupled to said heating element and said heater to control heating of said liquid, wherein said heating element is controlled based on a measured heating element parameter, and said heater is controlled independently of said heating element based on a measured heater parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification