US 4,332,254 A · System for filling and inflating and deflating a vascular dilating cathether assembly

Abstract

A system for filling and subsequently producing inflation and deflation of a balloon-type dilating catheter assembly utilized in performing a percutaneous transluminal coronary angioplasty procedure. Separate primary and secondary fluid pump assemblies are provided for isolating the working pump fluid in the primary assembly from the radiocontrast medium filling the secondary assembly. The primary fluid pump assembly includes a primary pump chamber having a flexible diaphragm forming one wall thereof and a hydraulic cylinder including a piston for supplying fluid under pressure to the pump chamber. The pump assembly has been filled with a relatively incompressible liquid while the piston in the cylinder is held in an intermediate fill position and the diaphragm is held substantially flat to enable the primary fluid pump assembly to produce both convex and concave shapes of the diaphragm as the piston is moved between forward and rearward position. The second fluid pump assembly is adapted to mount to the primary pump chamber. The secondary fluid pump assembly includes a secondary pump chamber having a second flexible diaphragm forming one wall thereof and adapted to mate with the first flexible diaphragm. A resealing fluid entry port is provided in the secondary pump chamber for admitting fluid to the chamber. A bayonet mounting arrangement for mounting the secondary pump chamber to the primary pump chamber is provided to bring the two diaphragms into intimate physical contact. Manual and automatic means for driving the piston of the hydraulic cylinder between forward and backward positions are disclosed to alternately create both balloon-inflating pressure and balloon-deflating vacuum in the secondary pump chamber and dilating catheter assembly by way of the diaphragms after it is filled with a relatively incompressible fluid.

Claims21

Dependent claims

In apparatus for the rapid inflation and deflation of a balloon-type dilating catheter assembly, a pistol grip housing adapted to be held in one hand and having spring loading actuator means mounted thereon adapted to be operated by a portion of said hand holding said housing between a released, balloon deflated position and an actuated balloon inflated position;

pump means at least partly carried by said housing coupled to said actuator means to be actuated thereby, said pump means including a pump chamber adapted to be connected to said catheter assembly and piston means coupled to said actuator means for altering the fluid holding volume of said pump chamber;
latching means carried on said housing for holding said actuating means in a catheter fill position intermediate said released, balloon deflation position and an actuated, balloon inflation position;
and fill port means carried on said pump chamber for filling said pump chamber and said catheter assembly with a relatively incompressible fluid when said actuator means is latched in said catheter fill position, whereby a balloon deflating vacuum is automatically produced in said pump chamber when said actuator means is in said released position and a balloon inflating pressure is produced in said pump chamber when said actuator is operated to an actuated, balloon inflation position.

In apparatus for the rapid inflation and deflation of a balloon-type dilating catheter assembly,

a primary fluid pump assembly comprising a primary pump chamber having a first flexible diaphragm forming one wall thereof, and a hydraulic cylinder including a piston for supplying fluid under pressure to said pump chamber, said pump assembly being filled with a relatively incompressible liquid while said piston is held in an intermediate fill position and said diaphragm is held substantially flat to produce both concave and convex shapes of said diaphragm as said piston is thereafter moved between forward and rearward positions;
a secondary fluid pump assembly adapted to mount to said primary pump chamber and comprising a secondary pump chamber having a second flexible diaphragm forming one wall thereof and adapted to mate with said first flexible diaphragm, a resealing fluid entry port means for admitting fluid to said secondary chamber, means for mounting said secondary pump chamber to said primary pump chamber with said first and second diaphragms in intimate physical contact, and means for communicating fluid between said secondary pump chamber and said dilating catheter assembly;
and
means for driving said piston of said hydraulic cylinder between said forward and backward positions thereby to alternately create balloon-inflating pressure and balloon-deflating vacuum in said secondary pump chamber and said dilating catheter assembly when filled with a relatively incompressible fluid.

1 more element

A sterilizable and disposable secondary fluid pumping assembly adapted to be releasably mated on one end to a balloon-type dilating catheter assembly and to be releasably coupled on another end to a primary fluid pump assembly which includes a primary pump chamber having a first flexible diaphragm forming one wall thereof, said assembly comprising a secondary pump chamber having a second flexible diaphragm forming one wall thereof and adapted to mate with said first flexible diaphragm, a resealing fluid entry port means for admitting fluid to said secondary chamber, means for mounting said secondary pump chamber to said primary pump chamber with said first and second diaphragms in intimate physical contact, and means for communicating fluid between said secondary pump chamber and said dilating catheter assembly.

Dependencies are inferred from the claim text.

System for filling and inflating and deflating a vascular dilating cathether assembly

Life of this patent

System for filling and inflating and deflating a vascular dilating cathether assembly

Life of this patent

Abstract

Claims21