Systems and methods for delivering stent grafts
First Claim
1. A catheter apparatus for delivering an implant, the catheter apparatus comprising:
- an inner shaft having a proximal portion, a distal portion, and an implant holding region at the distal portion;
an outer sheath disposed at least over the implant holding region of the inner shaft, the outer sheath being configured to be proximally retracted to expose an implant placed in the implant holding region to allow the implant to be deployed, and the retractable outer sheath having a proximal end and a distal end;
at least one retractable latch coupled to the proximal end of the outer sheath and configured to resist retraction of the outer sheath;
at least one cable coupled to the at least one retractable latch; and
a handle body enclosing the proximal portion of the inner shaft and the proximal end of the outer shaft,wherein the latch mechanism is configured to be released upon tensioning of the at least one cable over a threshold force so that the proximal retraction of the at least one cable over the threshold force proximally retracts the at least one retractable latch and the outer sheath, andwherein the handle body comprises an inner track, wherein the at least one retractable latch is configured to releasably couple to the inner track of the handle body to resist proximal retraction, and wherein the tensioning of the at least one cable over the threshold force releases the at least one retractable latch from the inner track of the handle body.
4 Assignments
0 Petitions
Accused Products
Abstract
A delivery catheter comprises an inner shaft and an outer sheath. A stent-graft is held on a region of the inner shaft. An enlarged diameter distal region of the outer sheath constrains the stent-graft. Its retraction allows the stent-graft to deploy. A finger wheel on a handle is used to retract the outer sheath and is coupled to a sliding block with cable(s). The sliding block is coupled to the outer sheath and is held within a sliding track. The wheel can be actuated to tension the cable(s) and deform latch(es) coupled to sliding block, freeing them from slot(s) in the sliding track and allowing retraction of the sliding block and the outer sheath. A reinforcement sleeve is coupled to a smaller diameter proximal region of the outer sheath. A gap between the outer sheath distal region and the reinforcement sleeve allows the distal outer shaft region to be retracted.
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Citations
45 Claims
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1. A catheter apparatus for delivering an implant, the catheter apparatus comprising:
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an inner shaft having a proximal portion, a distal portion, and an implant holding region at the distal portion; an outer sheath disposed at least over the implant holding region of the inner shaft, the outer sheath being configured to be proximally retracted to expose an implant placed in the implant holding region to allow the implant to be deployed, and the retractable outer sheath having a proximal end and a distal end; at least one retractable latch coupled to the proximal end of the outer sheath and configured to resist retraction of the outer sheath; at least one cable coupled to the at least one retractable latch; and a handle body enclosing the proximal portion of the inner shaft and the proximal end of the outer shaft, wherein the latch mechanism is configured to be released upon tensioning of the at least one cable over a threshold force so that the proximal retraction of the at least one cable over the threshold force proximally retracts the at least one retractable latch and the outer sheath, and wherein the handle body comprises an inner track, wherein the at least one retractable latch is configured to releasably couple to the inner track of the handle body to resist proximal retraction, and wherein the tensioning of the at least one cable over the threshold force releases the at least one retractable latch from the inner track of the handle body. - 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)
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25. A method of delivering an implant, the method comprising:
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advancing a catheter apparatus through a blood vessel to a target site; and retracting an outer sheath of the catheter apparatus to expose the implant and allow the implant to be deployed, the implant having been disposed on an implant holding region of an inner shaft of the catheter apparatus, wherein a proximal end of the outer sheath is coupled to at least one latch configured to resist retraction of the outer sheath, wherein retracting the outer sheath of the catheter apparatus comprises tensioning at least one cable of the catheter apparatus over a threshold force, thereby releasing at least one latch to allow the at least one latch and the outer sheath to be proximally retracted, and wherein the at least one retractable latch is biased to push outwardly against an inner track of a handle body of the catheter apparatus to provide friction to resist proximal retraction, and wherein the at least one latch is released by changing a configuration of the at least one retractable latch to release from the inner track of the handle body. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of delivering an implant, the method comprising:
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advancing a catheter apparatus through a blood vessel to a target site; and retracting an outer sheath of the catheter apparatus to expose the implant and allow the implant to be deployed, the implant having been disposed on an implant holding region of an inner shaft of the catheter apparatus, wherein a proximal end of the outer sheath is coupled to at least one latch configured to resist retraction of the outer sheath, wherein retracting the outer sheath of the catheter apparatus comprises tensioning at least one cable of the catheter apparatus over a threshold force, thereby releasing at least one latch to allow the at least one latch and the outer sheath to be proximally retracted, and wherein the at least one retractable latch is biased to push outwardly into one or more slots in an inner track of a handle body of the catheter apparatus to resist proximal retraction, and wherein the tensioning of the at least one cable over the threshold force retracts the at least one retractable latch from the one or more slots thereby allowing proximal retraction of the outer sheath. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification