Reflux fluid heated patient line
First Claim
1. A heat exchanger comprising a first tube carrying a first fluid, a second tube spaced from and surrounding said first tube for carrying a second fluid, partition means for dividing the space between said first and second tubes into first and second channels for carrying said second fluid, and first end cap means adjacent a first end of said first tube and a first end of said second tube for receiving said second fluid which has flowed through said first channel and for redirecting said second fluid to flow into said second channel, wherein said partition means terminates substantially flush with said first end of said first tube and said first tube and said first end cap means are separate elements.
4 Assignments
0 Petitions
Accused Products
Abstract
A heat exchanger useful for supplying infusates over substantial distances uses an extrusion which provides a central tube for carrying an infusate and two outer channels for carrying a heat exchange fluid. A first of the channels carries the heat exchange fluid from an inlet end to an opposite end, and the other of the channels returns the heat exchange fluid to the inlet end. An end cap at the inlet end is easily connected to a source of heat exchange fluid and communicates with the channels. An end cap at the opposite end receives the heat exchange fluid from the first channel and redirects it to the second channel. Both of the end caps have connectors for facilitating connection with lines from a source of infusate and a patient.
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Citations
17 Claims
- 1. A heat exchanger comprising a first tube carrying a first fluid, a second tube spaced from and surrounding said first tube for carrying a second fluid, partition means for dividing the space between said first and second tubes into first and second channels for carrying said second fluid, and first end cap means adjacent a first end of said first tube and a first end of said second tube for receiving said second fluid which has flowed through said first channel and for redirecting said second fluid to flow into said second channel, wherein said partition means terminates substantially flush with said first end of said first tube and said first tube and said first end cap means are separate elements.
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16. A heat exchanger comprising a first tube for carrying a first fluid, a second tube spaced from and surrounding said first tube for carrying a second fluid, partition means for dividing the space between said first and second tubes into first and second channels for carrying said second fluid, wherein said first tube, said second tube, and said partition means are of substantially equal lengths, and further comprising first end cap means separate from said first and second tubes and adjacent first ends of said first and second tubes for receiving said second fluid which has flowed through said first channel and for redirecting said second fluid to flow into said second channel.
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17. A heat exchanger comprising a first tube for carrying a first fluid, a second tube spaced from and surrounding said first tube for carrying a second fluid, partition means having a length substantially that of said first tube for dividing the space between said first and second tubes into first and second channels for carrying said second fluid, and first end cap means separate from said first tube adjacent first ends of said first and second tubes for receiving said second fluid which has flowed through said first channel and for redirecting said second fluid to flow into said second channel.
Specification