Insertion device for stents and methods for use
First Claim
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1. A stent delivery catheter, comprising:
- an outer sheath having a distal and proximal end and a lumen therethrough;
a peel-away sheath having a distal and proximal end and a lumen therethrough, said peel-away sheath slidably disposed within the lumen of said outer sheath, said peel-away sheath possessing at least one slit extending longitudinally from the distal end of said peel-away sheath and ending substantially at the proximal end of said peel-away sheath; and
an inner sheath having a distal and proximal end and a lumen therethrough, said inner sheath slidably disposed within the lumen of said peel-away sheath, said inner sheath having a distal portion proximally extending from the distal end of said inner sheath to a proximal end of said distal portion, said distal portion adapted to receive at least a portion of a stent.
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Abstract
Two embodiments for a stent delivery catheter are disclosed. In the first embodiment, the stent delivery catheter comprises an outer sheath, a peel-away sheath, and an inner sheath. In the second embodiment, the stent delivery catheter comprises an outer sheath and an inner tubular member which distally ends in a tongue having an arcuate cross section.
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Citations
7 Claims
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1. A stent delivery catheter, comprising:
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an outer sheath having a distal and proximal end and a lumen therethrough;
a peel-away sheath having a distal and proximal end and a lumen therethrough, said peel-away sheath slidably disposed within the lumen of said outer sheath, said peel-away sheath possessing at least one slit extending longitudinally from the distal end of said peel-away sheath and ending substantially at the proximal end of said peel-away sheath; and
an inner sheath having a distal and proximal end and a lumen therethrough, said inner sheath slidably disposed within the lumen of said peel-away sheath, said inner sheath having a distal portion proximally extending from the distal end of said inner sheath to a proximal end of said distal portion, said distal portion adapted to receive at least a portion of a stent. - View Dependent Claims (2, 3, 4, 5)
a stent having a proximal portion received by said distal portion of said inner sheath, said stent having a distal end, said stent being disposed within the lumen of said peel-away sheath whereby the distal end of said stent, the distal end of said peel-away sheath, and the distal end of said outer sheath are substantially aligned, and wherein said peel-away sheath has a proximal extension proximally extending from the proximal end of said outer sheath, and wherein said inner sheath has a proximal extension proximally extending from the proximal end of said peel-away sheath;
at least one restrainer clamped about said proximal extension of said peel-away sheath whereby said outer sheath is prevented from proximal displacements with respect to said peel-away sheath; and
at least one restrainer clamped about said proximal extension of said inner sheath whereby said peel-away sheath is prevented from proximal displacements with respect to said inner sheath.
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6. A method of placing a stent within a prostatic urethra, said method comprising:
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providing a stent delivery catheter comprising;
an outer sheath having a distal and a proximal end and a lumen therethrough;
a peel-away sheath having a distal and a proximal end and a lumen therethrough, said peel-away sheath slidably disposed within the lumen of said outer sheath;
said peel-away sheath possessing at least one slit extending longitudinally from the distal end of said peel-away sheath and ending substantially at the proximal end of said peel-away sheath;
an inner sheath having a distal and proximal end and a lumen therethrough, said inner sheath slidably disposed within the lumen of said peel-away sheath, said inner sheath having a distal portion proximally extending from the distal end of said inner sheath to a proximal end of said distal portion, said distal portion adapted to receive at least a portion of a stent;
a stent having a distal end and a proximal portion received by said distal portion of said inner sheath, said stent enclosed within the lumen of said peel-away sheath whereby the distal end of said stent is substantially aligned with the distal end of said peel-away sheath and with the distal end of said outer sheath, wherein said peel-away sheath has a proximal extension proximally extending from the proximal end of said outer sheath, and wherein said inner sheath has a proximal extension proximally extending from the proximal end of said peel-away sheath;
inserting the catheter through the urethra into the prostatic urethra;
proximally displacing the outer sheath with respect to said peel-away sheath along the proximal extension of the peel-away sheath whereby a distal portion of the outer sheath is exposed within the prostatic urethra;
distally displacing the inner sheath with respect to the peel-away sheath along the proximal extension of the inner sheath whereby a distal portion of the stent is deployed within the prostatic urethra and resists further displacement; and
proximally retracting the inner sheath and the peel-away sheath from the stent whereby the stent is fully deployed within the prostatic urethra. - View Dependent Claims (7)
removing all restrainers from the proximal extension of the peel-away sheath prior to the proximal displacement of the outer sheath with respect to the peel-away sheath; and
removing all restrainers from the proximal extension of the inner sheath prior to the distal displacement of the inner sheath with respect to the peel-away sheath.
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Specification