Catheter adaptor with slitting blade and improved manual control and method of use
AssigneeDanforth Biomedical, Inc.
InventorsJeff L. Kraus, Joseph R. Shields, Nitin P. Matani, Michael J. Horzewski
Life of this patent
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Abstract
A proximal adaptor for an over-the-wire angioplasty catheter is disclosed which contains a retractable catheter slitting element and a releasable guidewire seizing element, both of which are controllable by a manually operated element or elements accessible from the exterior of the adaptor.
Claims18
A proximal adaptor for securement to a proximal end of a catheter containing a lumen to receive a guidewire and to permit longitudinal movement of said catheter relative to said guidewire, said proximal adaptor comprising:
- a body containing first, second and third bores, joined at a common juncture region, said first and second bores each being of sufficient cross section to receive said catheter, and said third bore being of sufficient cross section to receive said guidewire;
- a cutting member slidably retained inside said body for movement between a cutting position and a retracted position;
- and
- cutting member manipulating means for manually manipulating said cutting member from outside said body.
A proximal adaptor in accordance with claim, 6 in which said releasable seizing member is length of flexible tubing mounted inside said third bore.
A catheter and proximal adaptor assembly, comprising:
- a catheter containing first and second lumens, defined as an inflation lumen and a guidewire lumen, respectively, said guidewire lumen adjacent to an external catheter wall;
- a holding member encircling said catheter and containing first, second and third bores joined at a common juncture region, said catheter extending through said first bore, said juncture region and said second bore;
- a cutting member slidably retained inside said holding member for movement between (i) a cutting position in which said cutting member is in contact with said catheter, piercing through said external catheter wall to said guidewire lumen and (ii) a retracted position in which said cutting edge is out of contact with said catheter;
- and
- cutting member manipulating means for manually manipulating said cutting member from outside said body.
A method for removing a catheter from a patient while leaving a guidewire in position, said guidewire passing through a lumen in said catheter and having served to facilitate the positioning of said catheter in said patient, said catheter and said guidewire both having proximal and distal ends, said method comprising:
- (a) securing said proximal ends of said catheter and said guidewire in a proximal adaptor comprising:
- (i) a body containing first, second and third bores, joined at a common juncture region, with said catheter passing through said first bore, said juncture region, and said second bore, and said guidewire passing through said first bore, said juncture region and said third bore, said catheter being pre-slit at said juncture region to permit separation of said guidewire from said catheter;
- (ii) a cutting member slidably retained inside said body for movement between a cutting position in said juncture region and a retracted position;
- and
- (iii) cutting member manipulating means for manually manipulating said cutting member from outside said body;
- (b) manually holding said cutting member manipulating means in said cutting position to engage said catheter, and drawing said catheter proximally through said first and second bores across said cutting member, thereby separating said catheter from said guidewire at said juncture region while retaining said guidewire substantially stationary relative to said proximal adaptor.
Dependencies are inferred from the claim text.