Pressure assisted ultrasonic balloon catheter and method of using same
First Claim
Patent Images
1. An ultrasonic balloon catheter and stent assembly comprising:
- a balloon catheter having a shaft with proximal and distal portions and one or more lumens, a balloon connected to the distal portion of the shaft and in communication with an inflation lumen, the balloon having an uninflated and an inflated state;
an acoustical energy generator associated with the catheter and adapted to provide oscillating energy at or near the balloon; and
a stent for placement in a body lumen and sized and configured to allow the balloon to be inserted in the stent in the uninflated state, wherein the acoustical energy generator transmits oscillating energy to the stent whereby transmission of the oscillating energy to the stent in combination or alternating with balloon pressure to a predetermined pressure causes deformation of the stent.
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Accused Products
Abstract
An ultrasonic balloon catheter and stent assembly including ultrasonic acoustical oscillating energy for low pressure balloon inflation and expansion of implantable devices including stents. The ultrasonic balloon catheter may also be used in low pressure angioplasty procedures.
96 Citations
22 Claims
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1. An ultrasonic balloon catheter and stent assembly comprising:
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a balloon catheter having a shaft with proximal and distal portions and one or more lumens, a balloon connected to the distal portion of the shaft and in communication with an inflation lumen, the balloon having an uninflated and an inflated state; an acoustical energy generator associated with the catheter and adapted to provide oscillating energy at or near the balloon; and a stent for placement in a body lumen and sized and configured to allow the balloon to be inserted in the stent in the uninflated state, wherein the acoustical energy generator transmits oscillating energy to the stent whereby transmission of the oscillating energy to the stent in combination or alternating with balloon pressure to a predetermined pressure causes deformation of the stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An ultrasonic balloon catheter and stent assembly comprising:
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a balloon catheter having a shaft with proximal and distal portions and one or more lumens, a balloon connected to the distal portion of the shaft and in communication with an inflation lumen, the balloon having an uninflated and an inflated state; an acoustical energy generator adapted to provide acoustical energy at or near the balloon; a stent for placement in a body lumen and sized and configured to allow the balloon to be inserted in the stent in the uninflated state whereby transmission of the oscillating energy to the stent at a range of about 10 kHz to about 50 kHz in combination with balloon pressure at a pressure range of about 2 atm to about 6 atm causes deformation of the stent. - View Dependent Claims (13, 14)
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15. A method of expanding a stent comprising the steps of:
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inserting the stent in a body vessel; disposing a catheter at or near a stent, the catheter having a balloon associated with an acoustical or ultrasonic energy generator; and transmitting acoustical or ultrasonic energy generated from the acoustical energy generator to the stent and simultaneously applying a predetermined pressure to the balloon to thereby expand the stent. - View Dependent Claims (16, 17, 18)
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19. A method of expanding a stent comprising
delivering a stent to a treatment site, the stent having an interior surface; -
delivering a balloon catheter to the treatment site, the balloon catheter having a tubular shaft defining a lumen, the catheter having a proximal portion and a distal portion, a balloon mounted on the catheter distal portion and in communication with the lumen, and an acoustical energy generator adapted for transmitting acoustical energy to at or near the balloon and to strain the stent in its hoop direction causing expansion of the stent; disposing the balloon within the stent; and transmitting acoustical energy to at or near the stent at a predetermined location and inflating the balloon to a predetermined pressure thereby applying force and energy to the stent interior surface or stent hoop direction. - View Dependent Claims (20, 21, 22)
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Specification