Inflation syringe assembly for percutaneous transluminal angioplasty
First Claim
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1. An inflation syringe assembly for percutaneous transluminal angioplasty, said assembly comprising:
- a housing adapted to receive fluid therein for balloon catheter inflation, said housing having a fluid discharge end and a fluid pressurization end;
a piston in said housing initially adjacent said fluid pressurization end and movable toward said fluid discharge end;
means for advancing the piston, said piston advancement means having a longitudinal advancement axis and being engaged with said piston and extending externally of the fluid pressurization end of said housing;
means for controlling movement of the piston, said piston movement control means being for transversely releasably engaging said piston advancement means, said piston movement control means being in said housing; and
lever means for engaging said piston movement control means and for moving same out of engagement with said piston advancement means, said lever means being secured to the syringe assembly.
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Abstract
An inflation device in the form of a syringe assembly for pressurization and depressurization of a ballon catheter includes a manually actuated lever used to disengae a half nut from controlled threaded advancement of a threaded rod which moves a piston. The threaded engagement between the half nut and the rod is such that about one half of the circumference of the rod is engaged, and disengagement movement of the half nut from the rod occurs transversely to the longitudinal axis of the rod.
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Citations
18 Claims
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1. An inflation syringe assembly for percutaneous transluminal angioplasty, said assembly comprising:
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a housing adapted to receive fluid therein for balloon catheter inflation, said housing having a fluid discharge end and a fluid pressurization end; a piston in said housing initially adjacent said fluid pressurization end and movable toward said fluid discharge end; means for advancing the piston, said piston advancement means having a longitudinal advancement axis and being engaged with said piston and extending externally of the fluid pressurization end of said housing; means for controlling movement of the piston, said piston movement control means being for transversely releasably engaging said piston advancement means, said piston movement control means being in said housing; and lever means for engaging said piston movement control means and for moving same out of engagement with said piston advancement means, said lever means being secured to the syringe assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A syringe assembly for accurate pressurization and rapid depressurization of a balloon catheter, the syringe assembly comprising:
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a first threaded surface for advancement and retraction of a plunger within a barrel of the syringe assembly, said first threaded surface being on an elongated rod in operative interengagement with the barrel; a second threaded surface for engagement and disengagement with said first threaded surface to control speed of advancement and retraction of said plunger, said second threaded surface being on a component that is moveable in a direction generally transverse to the first threaded surface; means for urging said second threaded surface into engagement with said first threaded surface, said urging means being in the syringe assembly; and lever means for overcoming said urging means to hold said second threaded surface out of engagement with said first threaded surface, said lever means being secured to the syringe assembly. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification