Prosthesis delivery system
First Claim
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1. A prosthesis delivery system, comprising:
- an elongate tubular body having a proximal end, tubular body, distal end, and a central lumen therethrough, the distal end comprising a distal chamber detachable from the remainder of the elongate tubular body, the distal chamber having a first rigid distal segment and a second flexible proximal transition segment, the first distal segment having an inner diameter, the inner diameter of the first distal segment being substantially constant and configured to house therethrough a prosthesis in a less than fully compressed configuration, the second proximal transition segment having an inner diameter that generally decreases from the distal end to the proximal end of the transition segment, the second proximal transition segment having an axial length that is at least 1.5×
the inner diameter of the first distal segment, the tubular body having an inner diameter smaller than the inner diameter of the first distal segment of the chamber, anda retrieval element configured to move the prosthesis proximally from the chamber, through the transition segment into the tubular body, thereby transforming the prosthesis from the less than fully compressed configuration when stored in the chamber to a fully compressed configuration.
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Abstract
Disclosed herein are implantable, radially expandable medical prostheses, including but not limited to stents, and delivery and loading systems applicable to the same, including disposable, detachable distal chambers, and methods for using the same.
15 Citations
32 Claims
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1. A prosthesis delivery system, comprising:
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an elongate tubular body having a proximal end, tubular body, distal end, and a central lumen therethrough, the distal end comprising a distal chamber detachable from the remainder of the elongate tubular body, the distal chamber having a first rigid distal segment and a second flexible proximal transition segment, the first distal segment having an inner diameter, the inner diameter of the first distal segment being substantially constant and configured to house therethrough a prosthesis in a less than fully compressed configuration, the second proximal transition segment having an inner diameter that generally decreases from the distal end to the proximal end of the transition segment, the second proximal transition segment having an axial length that is at least 1.5×
the inner diameter of the first distal segment, the tubular body having an inner diameter smaller than the inner diameter of the first distal segment of the chamber, anda retrieval element configured to move the prosthesis proximally from the chamber, through the transition segment into the tubular body, thereby transforming the prosthesis from the less than fully compressed configuration when stored in the chamber to a fully compressed configuration. - 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)
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27. A method of delivering an expandable prosthesis, comprising:
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providing a prosthesis delivery system having a detachable, disposable distal chamber removably attached at its proximal end to the distal end of a tubular body, the distal chamber having a first rigid distal segment and a second flexible proximal transition segment, the first distal segment having an inner diameter, the inner diameter of the first distal segment being substantially constant and configured to house therethrough the expandable prosthesis in a less than fully compressed configuration, the second proximal transition segment having an inner diameter that generally decreases from the distal end to the proximal end of the transition segment; wherein the expandable prosthesis is stored in a first, relatively expanded state within the chamber; and transferring the expandable prosthesis from the chamber to the tubular body by using vacuum or pressure to move the expandable prosthesis proximally, transforming the prosthesis from the first relatively expanded state to a second relatively compressed state during the transfer.
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28. A method of delivering an expandable prosthesis, comprising:
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providing a prosthesis delivery system having a detachable, disposable distal chamber removably attached at its proximal end to the distal end of a tubular body, the chamber having a proximal flexible transition segment and a distal rigid segment having a substantially constant outer diameter, the transition segment having a proximal end and a distal end, the transition segment having an axial length, a first inner diameter at the proximal end and a second inner diameter at the distal end, the transition segment having a first inner diameter that is less than the second inner diameter of the transition segment, the transition segment having an axial length that is at least about 2×
the outer diameter of the distal segment,wherein the expandable prosthesis is stored in a first, relatively expanded state within the chamber; and transferring the expandable prosthesis from the chamber to the tubular body to move the expandable prosthesis proximally, transforming the prosthesis from the first relatively expanded state to a second relatively compressed state during the transfer. - View Dependent Claims (29, 30, 31, 32)
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Specification