Balloon Catheter
First Claim
1. Balloon catheter for the implantation of a stent in a mammalian duct or cavity, comprising an elongate distal section and an expandable first balloon accommodating said section, further comprising means for the supply of a pressure medium for the expansion of said balloon, and means for heating said pressure medium, the catheter being provided with an elongate stent mounted onto said balloon wherein second means for establishing outwardly directed local expansion of the stent at a site or location selected from the two ends of the stent so that the stent will remain in position as implanted after removal of the catheter from said duct or cavity.
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Accused Products
Abstract
A balloon catheter is provided for the implantation of a stent in a mammalian duct or cavity, comprising an elongate distal section and an expandable first balloon accommodating the section, further comprising means for the supply of a pressure medium for the expansion of the balloon, and means for heating the pressure medium, the catheter being provided with an elongate stent mounted onto the balloon. The catheter contains second means for establishing outwardly directed expansion of the stent at a sight or location selected from the two ends of the stent so that the stent will remain in position as implanted after removal of the catheter from the duct or cavity; and a method for the implantation of a stent in a human prostatic urethra.
34 Citations
20 Claims
- 1. Balloon catheter for the implantation of a stent in a mammalian duct or cavity, comprising an elongate distal section and an expandable first balloon accommodating said section, further comprising means for the supply of a pressure medium for the expansion of said balloon, and means for heating said pressure medium, the catheter being provided with an elongate stent mounted onto said balloon wherein second means for establishing outwardly directed local expansion of the stent at a site or location selected from the two ends of the stent so that the stent will remain in position as implanted after removal of the catheter from said duct or cavity.
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18. A method for the implantation of a stent in a human prostatic urethra using a balloon catheter having a balloon for positioning in the urethra, comprising the steps:
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a) applying a stent of selected length capable of local radial expansion in a predetermined axial position onto said balloon;
b) inserting the catheter thus prepared into said urethra for positioning the stent therein;
c) distending the balloon by introducing a heated pressurized fluid therein to expand the stent locally at one or both ends thereof so as to keep the stent in position in said urethra;
d) removing fluid from the balloon and withdrawing the catheter from the urethra leaving the stent in position as implanted.
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19. A method for the treatment of and the implantation of a stent in a human prostatic urethra using a balloon catheter having a treatment balloon matching a treatment length to be measured and also having a distal positioning balloon to be placed in the urinary bladder, said method comprising the steps:
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1) measuring the relevant treatment length of said urethra;
2) introducing the catheter into said urethra;
3) expanding said positioning balloon and retracting the catheter to engagement of said balloon against the bladder neck to obtain correct position of the treatment balloon;
4) distending the treatment balloon by introducing a heated pressurized fluid therein to provide dilation and heat treatment of the prostatic urethra;
5) deflating both balloons and retracting the catheter from the urethra;
6) while using the same catheter, applying a stent of a selected length capable of local radial expansion in predetermined axial position onto said treatment balloon;
7) inserting the catheter thus prepared into said urethra;
8) expanding said positioning balloon and retracting the catheter to engagement of said balloon against the bladder neck to obtain correct position of the stent;
9) distending the treatment balloon by introducing a heated pressurized fluid therein to expand the stent at one or two ends of the stent so as to keep the stent in position in said urethra; and
10) removing fluid from the balloons and withdrawing the catheter from the urethra leaving the stent in position as implanted. - View Dependent Claims (20)
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Specification