Indwelling heat exchange catheter
First Claim
1. A catheter adapted to exchange heat with a body fluid flowing through a body conduit, the catheter comprisingan elongate body;
- at least one input lumen;
at least one output lumen;
at least one elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, each heat transfer lumen being in fluid communication with one of the at least one input lumen at the first end and in fluid communication with one of the at least one output lumen at the second end, each of the at least one elongate element further including a portion between the first and second ends forming multiple turns, each turn of a plurality of the multiple turns having a length, being bonded to the elongate body along a fraction of the length and being otherwise displaced from the elongate body.
2 Assignments
0 Petitions
Accused Products
Abstract
Catheters adapted to exchange heat with a body fluid flowing through a body conduit employ helical elongate lumens for heat transfer with the body fluid. The helical elongate lumen of a catheter forms multiple turns extending longitudinally of a portion of the catheter with the turns each being bonded to the catheter along a fraction of the length of the turn. The length of the lumen and its orientation in each turn has the lumen otherwise displaced over a major portion of its length from the elongate body. The turns of the helical lumen can be arranged in sets having different lengths to encounter all areas of the flow. One or more infusion lumens may also extend to an infusion port or ports. The helical elongate lumen is defined by an elongate, thin-walled element. This lumen is in fluid communication with a heater/chiller supplying a working fluid for heat transfer through the wall of the elongate element defining the helical elongate lumen. A proximal hub may be associated with the catheter to establish at least one suture anchor and to receive the heater/chiller flow through input and output lumens associated with the catheter and in fluid communication with the helical elongate lumens. The elongated lumens may also be arranged in non-helical arrangements such as in a semi-circular configuration, a figure-eight loop configuration or a random loop configuration.
230 Citations
48 Claims
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1. A catheter adapted to exchange heat with a body fluid flowing through a body conduit, the catheter comprising
an elongate body; -
at least one input lumen;
at least one output lumen;
at least one elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, each heat transfer lumen being in fluid communication with one of the at least one input lumen at the first end and in fluid communication with one of the at least one output lumen at the second end, each of the at least one elongate element further including a portion between the first and second ends forming multiple turns, each turn of a plurality of the multiple turns having a length, being bonded to the elongate body along a fraction of the length and being otherwise displaced from the elongate body. - View Dependent Claims (2, 3, 4, 5)
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6. A catheter adapted to exchange heat with a body fluid flowing through a body conduit, the catheter comprising
an elongate body; -
at least one input lumen;
at least one output lumen;
at least one elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, each heat transfer lumen being in fluid communication with one of the at least one input lumen at the first end and in fluid communication with one of the at least one output lumen at the second end, each of the at least one elongate element further including a portion between the first and second ends forming a helix of multiple turns and extending longitudinally of the elongate body, each turn of a plurality of the turns having a length, being bonded to the elongate body along a fraction of the length and being otherwise displaced from the elongate body. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A catheter adapted to exchange heat with a body fluid flowing through a body conduit, the catheter comprising
an elongate body; -
an input lumen;
an output lumen;
an elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, the heat transfer lumen being in fluid communication with the input lumen at the first end and in fluid communication with the output lumen at the second end, the elongate element further including a first portion between the first and second ends forming a helix of multiple turns extending longitudinally of the elongate body, the elongate element and the input lumen having substantially equal cross-sectional areas, a plurality of the turns each forming a loop area substantially greater than the major cross-sectional dimension of the elongate body when inflated. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A catheter adapted to exchange heat with a body fluid flowing through a body conduit, the catheter comprising
an elongate body allowing fluid flow therethrough; -
a helical elongate element extending about at least a part of the body and in fluid communication therewith, the helical elongate element extending such that the body fluid can flow between the element and the body to exchange heat with the working fluid. - View Dependent Claims (29, 30, 31, 32, 33, 34)
infusion lumens extending through the elongate body; infusion ports in fluid communication with the infusion lumens, respectively, and displaced axially of the elongate body.
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33. The catheter of claim 28 further comprising a proximal hub engaged with the elongate body and establishing at least one suture anchor.
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34. The catheter of claim 33 further comprising a heater/chiller communicating with the elongate body through the proximal hub to heat/cool the flow therethrough.
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35. A method for treating cardiac arrest in a patient comprising
defibrillating the patient; -
lowering the patient'"'"'s temperature using at least one catheter placed in the venous system of the patient by circulating coolant through the catheter while the catheter is positioned in the patient'"'"'s central venous system, such that the coolant does not enter the patient'"'"'s bloodstream, wherein the catheter comprises;
an elongate body;
at least one input lumen;
at least one output lumen;
at least one elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, each heat transfer lumen being in fluid communication with one of the at least one input lumen at the first end and in fluid communication with one of the at least one output lumen at the second end, each of the at least one elongate element further including a portion between the first and second ends forming multiple turns, each turn of a plurality of the multiple turns having a length, being bonded to the elongate body along a fraction of the length and being otherwise displaced from the elongate body. - View Dependent Claims (36, 37)
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38. A method for treating cardiac arrest in a patient comprising
administering a precordial thump to the patient; -
lowering the patient'"'"'s temperature using at least one catheter placed in the venous system of the patient by circulating coolant through the catheter while the catheter is positioned in the patient'"'"'s central venous system, such that the coolant does not enter the patient'"'"'s bloodstream, wherein the catheter comprises;
an elongate body;
at least one input lumen;
at least one output lumen;
at least one elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, each heat transfer lumen being in fluid communication with one of the at least one input lumen at the first end and in fluid communication with one of the at least one output lumen at the second end, each of the at least one elongate element further including a portion between the first and second ends forming multiple turns, each turn of a plurality of the multiple turns having a length, being bonded to the elongate body along a fraction of the length and being otherwise displaced from the elongate body.
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39. A method for treating myocardial infarction in a patient comprising
identifying the patient has myocardial infarction; -
lowering the patient'"'"'s temperature using at least one catheter placed in the venous system of the patient by circulating coolant through the catheter while the catheter is positioned in the patient'"'"'s central venous system, such that the coolant does not enter the patient'"'"'s bloodstream, wherein the catheter comprises;
an elongate body;
at least one input lumen;
at least one output lumen;
at least one elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, each heat transfer lumen being in fluid communication with one of the at least one input lumen at the first end and in fluid communication with one of the at least one output lumen at the second end, each of the at least one elongate element further including a portion between the first and second ends forming multiple turns, each turn of a plurality of the multiple turns having a length, being bonded to the elongate body along a fraction of the length and being otherwise displaced from the elongate body. - View Dependent Claims (40, 41)
monitoring the target temperature; - and
adjusting the heater/chiller unit to provide coolant at a coolant temperature in accordance with the target temperature.
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42. A method for treating myocardial infarction in a patient comprising
identifying that the patient has myocardial infarction; -
selecting a target temperature;
measuring the patient'"'"'s temperature;
lowering the patient'"'"'s temperature using at least one catheter placed in the venous system of the patient by circulating coolant through the catheter while the catheter is positioned in the patient'"'"'s central venous system, such that the coolant does not enter the patient'"'"'s bloodstream, wherein the catheter comprises;
an elongate body;
at least one input lumen;
at least one output lumen;
at least one elongate element including a heat transfer lumen extending longitudinally therethrough with first and second ends, each heat transfer lumen being in fluid communication with one of the at least one input lumen at the first end and in fluid communication with one of the at least one output lumen at the second end, each of the at least one elongate element further including a portion between the first and second ends forming multiple turns, each turn of a plurality of the multiple turns having a length, being bonded to the elongate body along a fraction of the length and being otherwise displaced from the elongate body;
adjusting the coolant temperature based on the patient'"'"'s temperature. - View Dependent Claims (43, 44, 45)
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46. A method for ameliorating the effects of myocardial infarction (MI) in a patient, comprising
administering at least one antithrombotic agent to the patient; -
advancing a catheter into the venous system of the patient; and
inducing mild or moderate hypothermia in the patient by circulating a working fluid through the catheter without the fluid contacting the blood.
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47. A method for combating the effects of myocardial infarction, comprising
making a cooling catheter available to a cardiac interventionist; -
instructing the cardiac interventionist to advance the catheter into the venous system of the patient upon presentation of symptoms of myocardial infarction; and
instructing the cardiac interventionist to initiate coolant flow through the catheter to induce hypothermia in the patient. - View Dependent Claims (48)
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Specification