Occlusion balloon catheter with longitudinally expandable balloon
View Patent ↗Balloon catheters such as guide catheters can be configured to provide distal occlusion, while still providing sufficient interior lumen space for device delivery. Such catheters can provide a desired level of balloon expansion, yet prevent vessel damage caused by balloon over-expansion. A catheter can include an elongate shaft having a distal region, a proximal region and a lumen extending therebetween. A balloon is inflated to a desired expansion configuration with a desired diameter. Over-inflation of the balloon causes longitudinal expansion instead of increased radial expansion, thus maintaining the diameter of the balloon.
1. A balloon catheter comprising:
an elongate shaft having a distal region and a proximal region and defining a lumen therebetween; and
an inflatable balloon disposed over a portion of the distal region of the elongate shaft, the balloon having distal and proximal portions and distal and proximal ends;
wherein the balloon is configured to expand to a first expansion configuration when a first amount of fluid is inserted into the balloon, and to expand to a second expansion configuration when a second, greater, amount of fluid is inserted into the balloon; wherein when the balloon is in the first expansion configuration, the distal portion of the balloon is expanded and the proximal portion of the balloon is in a collapsed configuration;
wherein the proximal portion of the balloon is releasably attached to the shaft;
wherein the proximal portion of the balloon is heat bonded to the shaft for releasably attaching to the shaft.
2. A catheter assembly comprising:
an elongate shaft having a distal region and a proximal region and a lumen disposed therebetween;
an expandable balloon disposed about the distal region of the shaft;
wherein the balloon is configured such that as an inflation fluid is inserted into the balloon, the balloon is expanded from a completely collapsed configuration to a partially inflated configuration and then to a fully inflated configuration; wherein a diameter of the balloon in the partially inflated configuration is substantially the same as a diameter of the balloon in the fully inflated configuration;
wherein in the partially inflated configuration a first portion of the balloon is inflated while a second portion of the balloon remains uninflated,and in the fully inflated configuration, both the first and second portions of the balloon are inflated;
wherein the balloon has first and second ends bonded to the shaft; wherein the second portion of the balloon is releasably attached to the shaft;
wherein the second portion of the balloon is heat bonded to the shaft for releasably attaching to the shaft.
3. A catheter assembly comprising:
an elongate shaft having a distal region and a proximal region and a lumen disposed therebetween;
an expandable balloon disposed about the distal region of the shaft;
wherein the balloon is configured such that as an inflation fluid is inserted into the balloon, the balloon is expanded from a completely collapsed configuration to a partially inflated configuration and then to a fully inflated configuration; wherein a diameter of the balloon in the partially inflated configuration is substantially the same as a diameter of the balloon in the fully inflated configuration;
wherein in the partially inflated configuration a first portion of the balloon is inflated while a second portion of the balloon remains uninflated, and in the fully inflated configuration, both the first and second portions of the balloon are inflated;
wherein the balloon has first and second ends bonded to the shaft; wherein the second portion of the balloon is releasably attached to the shaft;
wherein the second portion of the balloon is releasably attached to the shaft with a releasable adhesive.
4. A balloon catheter comprising:
an elongate shaft having a distal region and a proximal region and defining a lumen therebetween; and
an inflatable balloon disposed over a portion of the distal region of the elongate shaft, the balloon having a first longitudinal portion and a second longitudinal portion and distal and proximal ends;
wherein the balloon is configured for the first longitudinal portion to expand to a first expansion configuration when a first amount of fluid is inserted into the balloon, and for the second longitudinal portion to expand when a second, greater, amount of fluid is inserted into the balloon;
wherein the second longitudinal portion of the balloon is releasably attached to the shaft;
wherein the second longitudinal portion of the balloon is heat bonded to the shaft for releasably attaching to the shaft.
5. A balloon catheter comprising:
an elongate shaft having a distal region and a proximal region and a lumen therebetween; and
an inflatable balloon disposed over a portion of the distal region of the elongate shaft, the balloon having a first longitudinal portion and a second longitudinal portion and distal and proximal ends;
wherein the balloon is configured for the first longitudinal portion to expand to a first expansion configuration when a first amount of fluid is inserted into the balloon, and for the second longitudinal portion to expand when a second, greater, amount of fluid is inserted into the balloon;
wherein the second longitudinal portion of the balloon is releasably attached to the shaft;
wherein the second longitudinal portion of the balloon is releasably attached to the shaft with a releasable adhesive.