Stent placement instrument and method
First Claim
1. An instrument for the placement of a self-expanding stent in the prostatic urethra which comprises, a substantially rigid elongated inner tube having a proximal end, a distal end and a central axis, a hollow outer tube disposed about said inner tube along the axis thereof and adapted to carry a self-expanding stent adjacent said proximal end, and means for retaining and releasing said stent, in combination with at least one of the following components:
- - (a) location means for positioning and fixing the instrument so that the stent is released at a desired location within the prostatic urethra, which location means comprises an inflatable balloon which is adapted, when inflated, to be positioned adjacent the external sphincter at a predetermined distance from the prostate so that the stent will be released at the desired location within the prostatic urethra, and (b) means for releasing the stent in a retrograde manner.
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Accused Products
Abstract
An instrument for the placement of a self-expanding stent in a body canal, which comprises an elongated inner tube having an outer tube disposed along its axis adapted to carry and retain a self-expanding stent adjacent its proximal end, and an arrangement for releasing the stent, in combination with at least one of the following components: (a) a location member for positioning and fixing the instrument so that the stent is released at a desired location in the body canal, and (b) a member for releasing the stent in a retrograde manner. A method for placing a self-expanding stent in a body canal is also disclosed.
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Citations
5 Claims
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1. An instrument for the placement of a self-expanding stent in the prostatic urethra which comprises, a substantially rigid elongated inner tube having a proximal end, a distal end and a central axis, a hollow outer tube disposed about said inner tube along the axis thereof and adapted to carry a self-expanding stent adjacent said proximal end, and means for retaining and releasing said stent, in combination with at least one of the following components:
- - (a) location means for positioning and fixing the instrument so that the stent is released at a desired location within the prostatic urethra, which location means comprises an inflatable balloon which is adapted, when inflated, to be positioned adjacent the external sphincter at a predetermined distance from the prostate so that the stent will be released at the desired location within the prostatic urethra, and (b) means for releasing the stent in a retrograde manner.
- View Dependent Claims (2, 3)
- 4. A method for placing a self-expanding stent at a desired location in the prostatic urethra which comprises retaining said stent in an instrument comprising a substantially rigid elongated inner tube having a proximal end, a distal end and a central axis, a hollow outer tube disposed about said inner tube along the axis thereof and adapted to carry said stent adjacent said proximal end, means for retaining and releasing said stent and location means for positioning and fixing the instrument so that the stent is released at said desired location, which location means comprises an inflatable balloon which is adapted, when inflated, to be positioned adjacent the external sphincter at a predetermined distance from the prostate so that the stent will be released at the desired located within the prostatic urethra, which method comprises inserting the proximal end of said tube in the urethra, moving the instrument along the urethra, using the location means to locate the stent at the desired location, operating the releasing means to release the stent at said desired location and withdrawing the instrument from the urethra.
Specification