초록 ▼

An automated disinfection system for a hemodialysis machine having a proportioning pump includes a manifold block having a check valve for connection to a container of disinfection solution. The manifold block has an outlet connected to the suction line of the pump and an inlet connected to a warm w

An automated disinfection system for a hemodialysis machine having a proportioning pump includes a manifold block having a check valve for connection to a container of disinfection solution. The manifold block has an outlet connected to the suction line of the pump and an inlet connected to a warm water source via a solenoid valve. A timing and control circuit controls the solenoid valve to produce a water rinse cycle when the solenoid valve is open and a disinfection cycle when the solenoid valve is closed. The check valve closes when positive pressure is present in the manifold block during a rinse cycle and opens to admit solution to the pump when negative pressure is present in the manifold block during a disinfection cycle.

대표청구항 ▼

An automated disinfection system for installation in a hemodialysis machine, said machine having a proportioning pump with a water inlet means, a suction inlet means and an outlet means connected to a dialysate system, said disinfection system comprising: a vent valve having a flow path between mean

An automated disinfection system for installation in a hemodialysis machine, said machine having a proportioning pump with a water inlet means, a suction inlet means and an outlet means connected to a dialysate system, said disinfection system comprising: a vent valve having a flow path between means defining a water source and said water inlet of said proportioning pump, said vent valve including a housing having a vent chamber and means defining a vent opening to atmospheric pressure and a valve seat, said valve seat having a biased valve body associated therewith, said valve body attached to a diaphragm disposed in said housing, said diaphragm defining said flow path and said vent chamber, said valve body closing said valve seat only when water under pressure is present in said flow path; a remote operated valve having an inlet means connected to said water inlet of said proportioning pump and a water outlet means; a manifold block having means defining a chamber, a vent line communicating with said manifold chamber and connected to said valve seat of said vent valve, a disinfectant output line from said manifold chamber connected to said suction inlet of said proportioning pump, and a disinfectant input connection communicating with said manifold chamber; a check valve disposed in said disinfectant input connection of said manifold block, said check valve permitting flow of disinfectant only into said manifold chamber; a container for a disinfectant concentrate solution, said container having an output connector inserted into said disinfectant input connection of said manifold block; and control means operatively connected to said remote operated valve for sequentially opening same to water rinse said dialysate system, and closing said remote operated valve to disinfect said dialysate system. In a hemodialysis machine having means defining a source of water under pressure, a proportioning pump having an inlet means connected to said source and an outlet means connected to a dialysate line system, and a suction line, wherein the improvement comprises: a manifold block having an outlet means connected to said suction line, a first inlet means and a second inlet means; a check valve connected to said first inlet and having an input connection to means defining a source of disinfection solution, said check valve opening under negative pressure in said manifold block and closing under positive pressure in said manifold block; a remote controlled valve connected between said water source and said second inlet; and control and timing means connected to said remote controlled valve for selectively opening said remote controlled valve, said proportioning pump drawing water via said suction line into said dialysate line system, and said control and timing means selectively closing said remote controlled valve, such that said proportioning pump draws a disinfection solution via said suction line to disinfect said dialysate line system.