System and method for delivering thermally sensitive and reverse-thermal gelation materials
First Claim
Patent Images
1. A catheter system for injecting a therapeutic agent into a target site within the body of a patient, wherein the therapeutic agent exhibits differing viscosity at different temperatures, said catheter system comprising:
- a catheter having a distal end adapted for inserting into the body and a proximal end adapted for receiving fluid from one or more reservoirs, said catheter comprising;
a first lumen extending from the proximal end of the catheter to the distal end of the catheter and communication to the exterior of the catheter near the distal end;
an outer layer and an insulating layer disposed within the outer layer, said insulating layer surrounding the first lumen; and
a layer located between the insulation layer and the catheter wall.
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Accused Products
Abstract
A catheter for injecting a thermally sensitive gelation material to remote sites within a patient'"'"'s body by maintaining the thermally sensitive gelation material in a liquid state until it is delivered to a target area within the body.
108 Citations
38 Claims
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1. A catheter system for injecting a therapeutic agent into a target site within the body of a patient, wherein the therapeutic agent exhibits differing viscosity at different temperatures, said catheter system comprising:
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a catheter having a distal end adapted for inserting into the body and a proximal end adapted for receiving fluid from one or more reservoirs, said catheter comprising;
a first lumen extending from the proximal end of the catheter to the distal end of the catheter and communication to the exterior of the catheter near the distal end;
an outer layer and an insulating layer disposed within the outer layer, said insulating layer surrounding the first lumen; and
a layer located between the insulation layer and the catheter wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
a fluid having a high heat capacity.
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3. The catheter system of claim 1 wherein the insulating layer comprises foam.
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4. The catheter system of claim 1 wherein the insulating layer comprises a thermoplastic material.
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5. The catheter system of claim 1 wherein the insulating layer comprises a thermosetting material.
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6. The catheter system of claim 1 wherein the insulating layer comprises polyurethane foam.
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7. The catheter system of claim 1 wherein the insulating layer comprises silicone foam.
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8. The catheter system of claim 1 wherein the insulating layer comprises polyvinyl alcohol foam.
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9. The catheter system of claim 1 wherein the insulating layer comprises paper.
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10. The catheter system of claim 1 wherein the insulating layer comprises cellulose.
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11. The catheter system of claim 1 wherein the insulating layer comprises windings of material having a high heat capacity.
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12. The catheter system of claim 1 wherein the insulating layer comprises windings of material chosen from the group of polyurethane, silicone, polyvinyl alcohol, polyurethane foam, silicone foam, polyvinyl alcohol foam, paper, or cellulose.
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13. The catheter system of claim 1 further comprising:
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a reservoir of therapeutic material having a first viscosity at body temperature and a second viscosity at room temperature; and
means for injecting the therapeutic material from the reservoir into the first lumen.
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14. The catheter system of claim 13 wherein the therapeutic material Comprises a thermally sensitive gelling material.
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15. The catheter system of claim 13 wherein the therapeutic material comprises a reverse-thermal gel.
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16. The catheter system of claim 13 wherein the therapeutic material comprises a thermal gel.
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17. The catheter system of claim 13 wherein the therapeutic material comprises a thermally sensitive gelling material.
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18. The catheter system of claim 13 wherein the layer located between the insulation layer and The catheter is comprised of stainless steel mesh.
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19. The catheter system of claim 1 wherein:
the insulating layer comprises a second lumen located proximate the first lumen, said lumen extending from the proximal end of the catheter toward the distal end of the catheter, said lumen being adapted to receive a fluid from the proximal end of the catheter.
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20. The catheter system of claim 19 further comprising:
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a reservoir of the thermally insulating fluid; and
means for injecting the thermally insulating fluid from the reservoir into the second lumen.
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21. The catheter system of claim 20 wherein the second lumen is coaxially disposed about the first lumen.
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22. The catheter system of claim 20 wherein the second lumen is open to the exterior of the catheter near the distal end of the catheter.
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23. The catheter system of claim 20 further comprising a third lumen in fluid communication with the second lumen near the distal end of the second lumen, said third lumen extending proximally to the proximal end of the catheter.
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24. The catheter system of claim 23 wherein the third lumen is coaxially disposed about the first lumen.
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25. The catheter system of claim 19 wherein the thermally insulating fluid reservoir is filled with saline maintained a temperature different than body temperature.
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26. The catheter system of claim 19 wherein the second lumen is coaxially disposed about the first lumen.
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27. The catheter system of claim 19 wherein the second lumen is open to the exterior of the catheter near the distal end of the catheter.
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28. A catheter system for injecting a therapeutic agent into a target site within the body of a patient, wherein the therapeutic agent is a reverse-thermal gel, said catheter system comprising:
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a catheter having a distal end adapted for inserting into the body and a proximal end adapted for receiving fluid from one or more reservoirs, said catheter comprising;
a first lumen extending from the proximal end of the catheter to the distal end of the catheter and communication to the exterior of the catheter near the distal end;
an outer layer and an insulating layer disposed within the outer layer, said insulating layer surrounding the first lumen; and
a layer located between the insulation layer and the catheter wall; and
a reservoir of therapeutic agent comprising a reverse thermal gel, said reservoir adapted for fluid communication with the first lumen. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification