Method and apparatus for heating solutions within intravenous lines to desired temperatures during infusion
First Claim
1. A warming device for heating intravenous fluids to desired temperatures comprising:
- a housing;
a fluid cassette removably securable within said device to receive fluid from an intravenous fluid line, wherein said fluid cassette includes fluid line tubing arranged to form a fluid flow path through said cassette;
a plurality of heating elements disposed within said housing to heat said fluid cassette, wherein said heating elements are positioned to facilitate insertion of said cassette between at least two heating elements;
at least one temperature sensor to measure at least one temperature within said housing; and
a controller coupled to said at least one temperature sensor and said heating elements to control said heating elements in accordance with said at least one measured temperature.
1 Assignment
0 Petitions
Accused Products
Abstract
An IV line temperature controlled warming device includes a housing and a fluid cassette or cartridge that receives fluid from an IV line and includes intravenous line tubing arranged in a preformed configuration. The configuration includes tubing sections arranged in generally circular and concentric portions and a central serpentine tubing section that basically reverses fluid flow and facilitates flow in opposing directions within adjacent tubing sections. The fluid cassette is retained within the device on a base plate partially disposed within a device housing interior, while a housing cover is selectively opened and closed to permit access to the base plate. The base plate includes a heater plate disposed thereon, while the cover and heater plate each include heating elements to apply heat to opposing surfaces of the tubing cassette. The heating elements are controlled by a controller in response to measured temperatures of the heater plate and fluid.
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Citations
62 Claims
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1. A warming device for heating intravenous fluids to desired temperatures comprising:
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a housing;
a fluid cassette removably securable within said device to receive fluid from an intravenous fluid line, wherein said fluid cassette includes fluid line tubing arranged to form a fluid flow path through said cassette;
a plurality of heating elements disposed within said housing to heat said fluid cassette, wherein said heating elements are positioned to facilitate insertion of said cassette between at least two heating elements;
at least one temperature sensor to measure at least one temperature within said housing; and
a controller coupled to said at least one temperature sensor and said heating elements to control said heating elements in accordance with said at least one measured temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A fluid cassette to receive fluid from an intravenous fluid line and facilitate heating of said fluid to a desired fluid temperature within an intravenous fluid warming device, said cassette comprising:
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fluid line tubing including an inlet tubing portion with an inlet terminal to receive fluid into said cassette and an outlet tubing portion with an outlet terminal to release fluid from said cassette, said inlet and outlet terminals being securable to portions of said intravenous fluid line;
wherein said fluid line tubing further includes a plurality of tubing sections in fluid communication with said inlet and outlet tubing portions, each said tubing section defining a path for fluid flow in a particular direction, and wherein said fluid flow direction within each tubing section is opposite the fluid flow direction within a tubing section adjacent that section. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. In a warming device including a housing, a fluid cassette removably securable within said warming device, a plurality of heating elements, at least one temperature sensor and a controller, a method of heating intravenous fluids to desired temperatures comprising the steps of:
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(a) receiving fluid within said cassette from an intravenous fluid line, wherein said fluid cassette is disposed within said warming device between at least two of said heating elements and includes fluid line tubing arranged to form a fluid flow path through said cassette;
(b) heating said fluid cassette within said warming device via said heating elements;
(c) measuring at least one temperature within said housing; and
(d) controlling said heating elements in accordance with said at least one measured temperature. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A warming device for heating intravenous fluids to desired temperatures comprising:
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a housing;
fluid flow means removably securable within said device for receiving fluid from an intravenous fluid line, wherein said fluid flow means includes fluid line tubing arranged to form a fluid flow path through said fluid flow means;
a plurality of thermal means disposed within said housing for heating said fluid flow means, wherein said thermal means are positioned to facilitate insertion of said fluid flow means between at least two thermal means;
temperature means for measuring at least one temperature within said housing; and
control means coupled to said temperature means and said thermal means for controlling said thermal means in accordance with said at least one measured temperature. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A fluid cassette to receive fluid from an intravenous fluid line and facilitate heating of said fluid to a desired fluid temperature within an intravenous fluid warming device, said cassette comprising:
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fluid flow means including an inlet portion with an inlet terminal to receive fluid into said cassette and an outlet portion with an outlet terminal to release fluid from said cassette, said inlet and outlet portions being securable to portions of said intravenous fluid line;
wherein said fluid flow means further includes a plurality of concentric sections in fluid communication with said inlet and outlet portions, each said concentric section defines a path for fluid flow in a particular direction, and wherein said fluid flow direction within each concentric section is opposite the fluid flow direction within a concentric section adjacent that section. - View Dependent Claims (52, 53, 54, 55, 56)
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57. A fluid cassette to receive fluid from an intravenous fluid line and facilitate heating of said fluid to a desired fluid temperature within an intravenous fluid warming device, said cassette comprising:
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a fluid conduit including an inlet portion with an inlet terminal to receive fluid into said cassette and an outlet portion with an outlet terminal to release fluid from said cassette, said inlet and outlet portions being securable to portions of said intravenous fluid line;
wherein said fluid conduit further includes a plurality of concentric sections in fluid communication with said inlet and outlet portions, each said concentric section defines a path for fluid flow in a particular direction, and wherein said fluid flow direction within each concentric section is opposite the fluid flow direction within a concentric section adjacent that section. - View Dependent Claims (58, 59, 60, 61, 62)
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Specification