Heat transfer catheter with elastic fluid lumens
First Claim
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1. A heat exchange catheter comprising:
- a catheter body having a proximal end and a distal region; and
a heat exchange balloon structure disposed over the distal region;
wherein the heat exchange balloon structure expands and deflates elastically when uninflated.
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Abstract
The heat exchange catheters comprise a catheter body having a heat exchange structure formed over a distal region thereof. Heat exchange structure comprises an elastic chamber or balloon which conforms closely to the catheter body when uninflated and which expands to enhance the available heat transfer surface when heat exchange medium is introduced. The elastic structures may consist of elastomeric sheets or membranes or may comprise non-distensible sheets or membranes having elastic elements in order to control expansion and contraction. Methods for fabrication and use are also disclosed.
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Citations
53 Claims
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1. A heat exchange catheter comprising:
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a catheter body having a proximal end and a distal region; and
a heat exchange balloon structure disposed over the distal region;
wherein the heat exchange balloon structure expands and deflates elastically when uninflated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A heat exchange catheter comprising:
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a catheter body having a proximal end, a distal region, an inflow lumen, and an outflow lumen; and
a heat exchange balloon structure comprising a plurality of elastic polymeric chambers disposed over the distal region and fluidly connected at an inlet end to the inflow lumen and at an outlet end to the outflow lumen. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A heat exchange catheter comprising:
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a catheter body having a proximal end, a distal region, an inflow lumen, and an outflow lumen; and
an elastomer tube coaxially positioned over the distal region;
wherein the elastomer tube is sealed to the catheter body along a multiplicity of lines to define a plurality of separate inflatable chambers, each at which is fluidly connected at an inlet end to the inflow lumen and at an outlet end to the outflow lumen. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method for fabricating a catheter, said method comprising:
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positioning a tubular catheter body over a mandrel, wherein said catheter body has at least an inflow lumen and an outflow lumen;
placing an elastomer tube over a distal region of the catheter body;
attaching the elastomer tube to the tubular catheter body to define a plurality of separate elastically expandable chambers between the outside of the catheter body and the inside of the elastomer tube, wherein an inlet end of the chamber is fluidly connected to the inflow lumen and an outlet end of the chamber is fluidly connected to the outflow lumen. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45)
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46. A method for exchanging heat with vascular circulation of a patient, said method comprising;
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percutaneously introducing a catheter to a blood vessel of the patient, wherein the catheter includes at least one elastic chamber conformed over a surface thereof;
elastically inflating the chamber with a heat exchange medium, whereby heat is exchanged between the heat exchange medium and the vascular circulation. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53)
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Specification