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US 5,336,165 AGranted
Artificial kidney for frequent (daily) Hemodialysis
OwnerZbylut J. Twardowskiinventor
Life of this patent
Estimating the term…
Abstract
A hemodialyzer apparatus comprises a reusable dialyzer membrane as well as reusable blood flow path and dialysis flow path units. The apparatus automatically primes itself and makes dialysis solution from dry chemicals, concentrates, and fresh water which is provided to the apparatus. Also, after use, the apparatus automatically prepares cleaning and rinsing solution for the cleaning and rinsing of the dialyzer membrane as well as the dialyzate and blood flow path means, to provide a system which is so simplified in terms of automatic operation that it may be usable for daily dialysis at home.
Claims25
A hemodialyzer apparatus, which comprises:
- dialyzer membrane means having first and second sides;
- dialysate flow path means positioned for passing dialysis solution across the first side of said membrane means;
- blood flow path means positioned for passing blood across the second side of said membrane means for dialysis thereof;
- a solution storage tank connected to said dialysate flow path means;
- venous and arterial connector means communicating with said blood flow path means for alternative connection with a vascular system of a patient and with each other;
- a water inlet conduit;
- a first conduit extending from said water inlet conduit to receive purified water therefrom;
- a second conduit connected to said first conduit, having means for carrying desired amounts of dialysis solution solutes, whereby a predetermined amount of purified water from said first conduit passing through said second conduit disperses said solutes;
- further conduit means connected between said second conduit and said solution storage tank to provide a desired quantity of said dialysis solution to said tank in a first operating mode;
- a third conduit, also connected to said first conduit, having means for carrying desired amounts of hemodialyzer apparatus antimicrobial and cleaning agent, whereby a predetermined amount of purified water from said first conduit passing through said third conduit disperses said agent and may be conveyed through said further conduit means to said solution storage tank to provide a desired quantity of antimicrobial cleaning solution to said tank in a second operating mode;
- and
- valve and control means to selectively and automatically provide and control fluid flow throughout said apparatus.
9 more elements
A hemodialyzer apparatus, which comprises:
- dialyzer membrane means having first and second sides;
- dialysate flow path means positioned for passing dialysis solution across the first side of said membrane means;
- blood flow path means positioned for passing blood across the second side of said membrane means for dialysis thereof;
- a solution storage tank connected to said dialysate flow path means;
- venous and arterial connector means communicating with said blood flow path means for alternative connection with a vascular system of a patient and with each other;
- a water inlet conduit;
- a first conduit extending from said water inlet conduit to receive purified water therefrom;
- a second conduit connected to said first conduit, having means for carrying desired amounts of dialysis solution solutes, whereby a predetermined amount of purified water from said first conduit passing through said second conduit disperses said solutes;
- further conduit means connected between said second conduit and said solution storage tank to provide a desired quantity of said dialysis solution to said tank in a first operating mode;
- a third conduit, also connected to said first conduit, having means for carrying desired amounts of hemodialyzer apparatus antimicrobial and cleaning agent, whereby a predetermined amount of purified water from said first conduit passing through said third conduit disperses said agent and may be conveyed through said further conduit means to said solution storage tank to provide a desired quantity of antimicrobial cleaning solution to said tank in a second operating mode;
- a fourth conduit, connected between said dialysate flow path means and said blood flow path means, plus one way valve means, to selectively permit one way flow of antimicrobial cleaning solution and rinsing solution from said blood flow path means to said dialysate flow path means for discard;
- means for providing normal saline solution to said blood flow path means to selectively permit flushing of said saline solution through said fourth conduit and the blood flow path means in one mode of operation, and to flush saline through the blood flow path to at least one of said venous and arterial connector means in another mode of operation to maximize blood return to the patient;
- and
- valve and control means to selectively and automatically provide and control fluid flow throughout said apparatus.
11 more elements
A hemodialyzer apparatus, which comprises:
- dialyzer membrane means having first and second sides;
- dialysate flow path means positioned for passing dialysis solution across the first side of said membrane means;
- blood flow path means positioned for passing blood across the second side of said membrane means for dialysis thereof;
- a solution storage tank connected to said dialysate flow path means;
- venous and arterial connector means communicating with said blood flow path means for alternative connection with a vascular system of a patient and with each other;
- a water inlet conduit;
- a first conduit extending from said water inlet conduit to receive purified water therefrom;
- a second conduit connected to said first conduit, having means for carrying desired amounts of dialysis solution solutes, whereby a predetermined amount of purified water from said first conduit passing through said second conduit disperses said solutes;
- further conduit means connected between said second conduit and said solution storage tank to provide a desired quantity of said dialysis solution to said tank in a first operating mode;
- a third conduit, also connected to said first conduit, having means for carrying desired amounts of hemodialyzer apparatus antimicrobial and cleaning agent, whereby a predetermined amount of purified water from said first conduit passing through said third conduit disperses said agent and may be conveyed through said further conduit means to said solution storage tank to provide a desired quantity of antimicrobial cleaning solution to said tank in a second operating mode;
- and
- valve and control means to selectively and automatically provide and control fluid flow throughout said apparatus;
- said second conduit comprising a separate solute receptacle containing solid, powdered dialysis solution solute, said third conduit having receptacle means containing powdered antimicrobial and cleaning agent.
10 more elements
Dependencies are inferred from the claim text.