Stent deployment device with two balloons
First Claim
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1. A medical device comprising:
- a) a catheter having a proximal portion and a distal portion;
b) a stent disposed about the distal portion of the catheter, the stent radially expandable between a reduced-diameter, non-deployed state at which the stent has a non-deployed length and an increased-diameter, deployed state at which the stent has a deployed length which is less than the non-deployed length;
c) a relatively non-compliant, discrete inner balloon disposed about the distal portion of the catheter between the catheter and the stent and having an inner balloon working section length at least substantially equal to the deployed length of the stent;
d) a relatively compliant, discrete outer balloon disposed about the distal portion of the catheter between the inner balloon and the stent and having an outer balloon working section length which is greater than the inner balloon working section length and equal to or greater than the non-deployed length of the stent; and
e) inflation means for selectively inflating the inner and outer balloons to radially-expand the stent to the deployed state.
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Accused Products
Abstract
A stent delivery device having a pair of balloons at a proximal end of a catheter and having separate lumens for selectively inflating the respective balloons. The outer balloon is relatively compliant and the inner balloon is relatively non-compliant. A central lumen is provided for a guide wire. A stent is carried by the delivery device within an axially retractable sheath at the distal end of the catheter and is deployed by retraction of the sheath and inflation of the compliant balloon, and the stent is subsequently expanded by inflation of the non-compliant balloon.
54 Citations
23 Claims
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1. A medical device comprising:
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a) a catheter having a proximal portion and a distal portion; b) a stent disposed about the distal portion of the catheter, the stent radially expandable between a reduced-diameter, non-deployed state at which the stent has a non-deployed length and an increased-diameter, deployed state at which the stent has a deployed length which is less than the non-deployed length; c) a relatively non-compliant, discrete inner balloon disposed about the distal portion of the catheter between the catheter and the stent and having an inner balloon working section length at least substantially equal to the deployed length of the stent; d) a relatively compliant, discrete outer balloon disposed about the distal portion of the catheter between the inner balloon and the stent and having an outer balloon working section length which is greater than the inner balloon working section length and equal to or greater than the non-deployed length of the stent; and e) inflation means for selectively inflating the inner and outer balloons to radially-expand the stent to the deployed state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A medical device comprising:
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a) a catheter having a proximal portion and a distal portion; b) a inner balloon having a working section characterized by an axial length and disposed about the distal portion of the catheter, the inner balloon having an inner balloon compliance; c) a outer balloon having a working section characterized by an axial length greater than the axial length of the working section of the inner balloon and disposed about the inner balloon at the distal portion of the catheter the outer balloon having an outer balloon compliance which is greater than the inner balloon compliance; d) a stent disposed about the inner and outer balloons and having a non-deployed length less than or equal to the axial length of the working section of the outer balloon and a deployed length substantially equal to the axial length of the working section of the inner balloon and e) inflation means for selectively inflating the inner and outer balloons to radially-expand the stent to the deployed state. - View Dependent Claims (23)
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20. A method of using a stent deployment device having a stent deployment balloon and a stent expansion balloon comprising the steps of:
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a) inserting the stent deployment device into a vessel wherein the device has a inner balloon disposed about a distal region thereof and having an inner balloon compliance, a outer balloon disposed about the inner balloon and having an outer balloon compliance which is greater than the inner balloon compliance, a stent disposed about the outer balloon, and a sheath disposed about the stent; b) maneuvering the device to position the distal region at a treatment site; c) retracting the sheath such that the stent is presented to the treatment site; d) inflating the outer balloon to deploy the stent; e) inflating the inner balloon along substantially the full axial length of the deployed stent to further expand and set the stent; and f) withdrawing the device from the vessel. - View Dependent Claims (21, 22)
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Specification