Abstract: The disclosed principles prevent over pressurization of harvested veins by controlling the amount and consistency of pressure applied through the veins from a continuous flow of fluid. This combination of regulated pressurization and continuity/uniformity in the pressure applied through veins is provided using a preparation pump constructed in accordance with the disclosed principles. In some embodiments the pump incorporates a spiral spring to deliver fluids from a bladder within the pump and through a vessel cannula inserted into the grafted vein, and in other embodiments the pump incorporates magnets to compress the bladder. The disclosed apparatus provides only a limited amount of pressure such that no injury is caused to the vein. Pressure and flow are limited and maintained constant, i.e.

Abstract: An elastomeric vein graft preparation pump. The elastomeric vein graft preparation pump can include an elastomeric compliant body configured to contain a fluid, a fluid conduit coupled to the elastomeric compliant body, and a control valve disposed through the fluid conduit. The control valve is configured to regulate a flow of the fluid through the fluid conduit. The elastomeric compliant body provides an elastic recoil pressure based on a volume of the fluid contained in the elastomeric compliant body, and the fluid flows through the fluid conduit at a pressure based on the elastic recoil pressure.

Abstract: The disclosed principles provide a vein graft preparation pump, and related methods of use and manufacturing thereof, providing a constant and uniform pressure of fluid flowed through a vein graft being prepared for use in a bypass procedure. An exemplary pump includes a syringe holder having an opening for holding a syringe body, and a slot formed within the opening for receiving a flange of the syringe body. The syringe holder also includes left and right side rails, and a spring housing coupled to rear ends of the side rails to secure the rear end of a spring therein. A plunger depressor includes a back in contact with the front end of the spring, and a front having a plunger base for engaging a syringe plunger. Decompression of the spring moves the plunger depressor along the syringe holder during use of the pump thereby providing constant and uniform pressure depressing said syringe plunger.

Abstract: A pressure-regulated vein graft preparation pump for preparing a vein graft. The pressure-regulated vein graft preparation pump includes: a source of pressurized fluid which is configured to supply the pressurized fluid through a flow path extending through a fluid conduit, a cannula configured to be coupled to an end of the fluid conduit, and a pressure control device coupled to the cannula. The pressure control device is located downstream from the source of the pressurized fluid and configured to limit a pressure exerted on the fluid conduit by the pressurized fluid.

Abstract: The disclosed principles provide regulated pressurization and continuity/uniformity in the pressure applied through harvested veins using a unique vein graft preparation pump. Generally speaking, the apparatus incorporates one or more elastic members, each with a predetermined elastic constant or modulus of elasticity, or alternatively a collective predetermined elastic constant or collective modulus of elasticity, that is sufficient to deliver fluids from a syringe through a vessel cannula inserted into the vein section selected for a grafting procedure. Additionally, the disclosed apparatus provides only a limited amount of pressure such that no injury is caused to the vein. Pressure and flow are limited and maintained constant via use of the one or more elastic members, i.e.