Passive perfusion sleeve/placement catheter assembly
First Claim
1. A perfusion sleeve/placement catheter assembly designed to treat a diseased coronary artery, the assembly comprising:
- a perfusion sleeve apparatus comprising a first elongate shaft including a proximal end and a distal end, and having an inflation lumen extending along the longitudinal length of said shaft;
said perfusion sleeve apparatus further comprising a composite balloon located near said distal end, said balloon comprised of an inner semi-rigid material and an outer expandable material, said inner material and said outer material having mating surfaces at their ends which are bonded together to form said composite balloon with selective expansion, said composite balloon defining an interior which is in communication with the distal end of said inflation lumen;
said perfusion sleeve apparatus defining a blood flow channel;
a placement catheter having a second elongate shaft, said shaft having a guidewire lumen integral therewith;
said placement catheter including a second expandable balloon connected to a distal end of said second shaft, said expandable balloon of said placement catheter designed to engage an interior surface of said inner material of said composite balloon.
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Accused Products
Abstract
A passive perfusion sleeve/placement catheter assembly for performing coronary angioplasty allows prolonged dilatations without blocking blood flow. The perfusion sleeve comprise an elongated shaft with a distally mounted composite balloon including a semi-rigid inner material surrounded by a more flexible and expandable outer material which can extend radially from the catheter and engage the vessel wall and atheroma. The semi-rigid inner material requires more pressure to cause distention than the outer expandable material thereby defining a blood flow channel. The perfusion sleeve/placement catheter assembly of the present invention includes a perfusion sleeve apparatus having a multiple lumen shaft and an expanding balloon connected to a distal end of the shaft. A placement catheter is employed to assist in delivery and retraction of the sleeve. The passive perfusion sleeve provides for optimum blood flow through the blood flow channel when the balloon is inflated and the placement catheter is proximally retracted.
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Citations
20 Claims
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1. A perfusion sleeve/placement catheter assembly designed to treat a diseased coronary artery, the assembly comprising:
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a perfusion sleeve apparatus comprising a first elongate shaft including a proximal end and a distal end, and having an inflation lumen extending along the longitudinal length of said shaft;
said perfusion sleeve apparatus further comprising a composite balloon located near said distal end, said balloon comprised of an inner semi-rigid material and an outer expandable material, said inner material and said outer material having mating surfaces at their ends which are bonded together to form said composite balloon with selective expansion, said composite balloon defining an interior which is in communication with the distal end of said inflation lumen;
said perfusion sleeve apparatus defining a blood flow channel;
a placement catheter having a second elongate shaft, said shaft having a guidewire lumen integral therewith;
said placement catheter including a second expandable balloon connected to a distal end of said second shaft, said expandable balloon of said placement catheter designed to engage an interior surface of said inner material of said composite balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A perfusion sleeve/placement catheter assembly for use in combination with a guidewire to dilate a stenosed coronary artery, the assembly comprising:
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a perfusion sleeve apparatus including a first elongate shaft including a proximal end and a distal end, and having an inflation lumen extending along the longitudinal length of said shaft;
said perfusion sleeve apparatus comprising a composite balloon configured as a sleeve and located near said distal end, said balloon comprised of an inner semi-rigid material and an outer flexible material, said inner material and said outer material having mating surfaces which at their ends are bonded together to form said composite balloon, said composite balloon defining an interior which is in communication with the distal end of said inflation lumen;
said perfusion sleeve apparatus defining a blood flow channel;
a placement catheter having a second elongate shaft, said shaft having a relatively short guide wire lumen located near the distal end of said second elongate shaft; and
said placement catheter including a second expandable balloon connected to a distal end of the shaft. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification