NL7701451A - Circulating dialyser fluid through an artificial kidney - via directional valve diverting flow from pumps under pilot control - Google Patents

Circulating dialyser fluid through an artificial kidney - via directional valve diverting flow from pumps under pilot control

Info

Publication number
NL7701451A
NL7701451A NL7701451A NL7701451A NL7701451A NL 7701451 A NL7701451 A NL 7701451A NL 7701451 A NL7701451 A NL 7701451A NL 7701451 A NL7701451 A NL 7701451A NL 7701451 A NL7701451 A NL 7701451A
Authority
NL
Netherlands
Prior art keywords
fluid
artificial kidney
dialyser
switching mechanism
directional valve
Prior art date
Application number
NL7701451A
Other languages
Dutch (nl)
Original Assignee
Johannes August Flendrig
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johannes August Flendrig filed Critical Johannes August Flendrig
Priority to NL7701451A priority Critical patent/NL7701451A/en
Publication of NL7701451A publication Critical patent/NL7701451A/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A61M1/1621—Constructional aspects thereof
    • A61M1/1635—Constructional aspects thereof with volume chamber balancing devices between used and fresh dialysis fluid
    • A61M1/1641—Constructional aspects thereof with volume chamber balancing devices between used and fresh dialysis fluid linked by pistons

Abstract

A switching mechanism, for use in an appts. for the circulation of dialyser fluid through an artificial kidney, works with two double-acting, synchronously running plunger pumps of identical capacity. The pump compartments act alternately as suction and pressure vessels, so that dialyser fluid is drawn into them from one direction and expelled from them in another. Lines connect through the switching mechanism to and from the artificial kidney, from a supply of fresh fluid and to drain for wasting the used material. The switching mechanism is an hydraulic directional valve comprising a spindle with the necessary bored passages, moved by the pressure in a control circuit which also operates the plunger pumps, in a cylinder so as to link ports to pipelines for transporting the fluid as required. There is no risk of ultrafiltration due to malfunctioning of limit switches, etc., esp. of water from the patient. The dialysing fluid can flow in open circuit and only one pipeline is necessary for each pump compartment. The alternate connecting of the plunger pump to the artificial kidney, to the source of fresh dialyser fluid or to the waste for used fluid, takes place without electrically controlled valves or limit switches.
NL7701451A 1977-02-11 1977-02-11 Circulating dialyser fluid through an artificial kidney - via directional valve diverting flow from pumps under pilot control NL7701451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7701451A NL7701451A (en) 1977-02-11 1977-02-11 Circulating dialyser fluid through an artificial kidney - via directional valve diverting flow from pumps under pilot control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7701451A NL7701451A (en) 1977-02-11 1977-02-11 Circulating dialyser fluid through an artificial kidney - via directional valve diverting flow from pumps under pilot control

Publications (1)

Publication Number Publication Date
NL7701451A true NL7701451A (en) 1977-05-31

Family

ID=19827963

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7701451A NL7701451A (en) 1977-02-11 1977-02-11 Circulating dialyser fluid through an artificial kidney - via directional valve diverting flow from pumps under pilot control

Country Status (1)

Country Link
NL (1) NL7701451A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2414351A1 (en) * 1978-01-16 1979-08-10 Bret Claude Controlling ultrafiltration rate in haemodialysis - by controllable synchronous inlet and outlet pumps circulating dialysate through dialyser with pumped tapping off of ultrafiltrate
FR2434624A1 (en) * 1978-09-02 1980-03-28 Fresenius Chem Pharm Ind HEMODIALYSIS ULTRRAFILTRATION CONTROL APPARATUS
US4267041A (en) * 1977-07-30 1981-05-12 Eduard Fresenius Apparatus for the ultrafiltration control in connection with the hemodialysis
US4367140A (en) * 1979-11-05 1983-01-04 Sykes Ocean Water Ltd. Reverse osmosis liquid purification apparatus
US10625009B2 (en) 2016-02-17 2020-04-21 Baxter International Inc. Airtrap, system and method for removing microbubbles from a fluid stream

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267041A (en) * 1977-07-30 1981-05-12 Eduard Fresenius Apparatus for the ultrafiltration control in connection with the hemodialysis
FR2414351A1 (en) * 1978-01-16 1979-08-10 Bret Claude Controlling ultrafiltration rate in haemodialysis - by controllable synchronous inlet and outlet pumps circulating dialysate through dialyser with pumped tapping off of ultrafiltrate
FR2434624A1 (en) * 1978-09-02 1980-03-28 Fresenius Chem Pharm Ind HEMODIALYSIS ULTRRAFILTRATION CONTROL APPARATUS
US4267040A (en) * 1978-09-02 1981-05-12 Dr. Edward Fresenuis, Chemischpharmazeutische Industrie Kg, Apparatebau Kg Hemodialysis apparatus
US4770769A (en) * 1978-09-02 1988-09-13 Fresenius Aktiengesellschaft Hemodialysis apparatus with degassing means for the dialysis solution
US4367140A (en) * 1979-11-05 1983-01-04 Sykes Ocean Water Ltd. Reverse osmosis liquid purification apparatus
US10625009B2 (en) 2016-02-17 2020-04-21 Baxter International Inc. Airtrap, system and method for removing microbubbles from a fluid stream

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Legal Events

Date Code Title Description
BV The patent application has lapsed