← Back to Patent Explorer
US5545131A Expired / Lapsed US ⏱️ 0.0 years remaining

Artificial kidney

Assignee: ADVANCED RENAL TECHNOLOGIES LLC
•
Filing: 1994-11-30
•
Granted: 1996-08-13
•
Expires: 2014-11-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An artificial kidney system comprises an artificial kidney forming container having an inlet blood port connectable with a patient's artery and an outlet blood port connectable with a patient's vein so that blood from the patient's artery can flow through the inlet port into the container, then through an inner space of the container and then through the outlet blood port into the patient's vein, the inner space of the container being filled with an adsorbent for removing harmful and toxic compounds from a stream of blood flowing in the inner space from the inlet blood port to the outlet blood port, the container being provided with a separate chamber formed inside the inner space and limited by a semi-permeable polymeric ultrafiltration-type membrane which allows water and dissolved small molecules to be transported from blood into the chamber, and suction element connectable with the separate chamber so that the water and the dissolved small molecules are transported from blood into the separate chamber and further outside of the container under the action of suction of the suction element.

Inventors

  • 👤 Vadim A. Davankov

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 01:54
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3679

Claims Analysis

Total Claims: 16
Claim 1
Independent Claim 292 words
An artificial kidney system, comprising an artificial kidney forming container having an inlet blood port connectable with a patient's artery and an outlet blood port connectable with a patient's vein so that blood from the patient's artery can flow through said inlet port into said container, then through an inner space of said container and then through said outlet blood port into the patient's vein, said inner space of said container being filled with an adsorbent for removing harmful and toxic compounds from a stream of blood flowing in said inner space from said inlet blood port to said outlet blood port, said container being provided with a separate chamber formed inside said inner space and limited by a semi-permeable polymeric ultrafiltration-type membrane which allows water and dissolved small molecules to be transported from blood into said chamber; suction means connected with said separate chamber so that the water and the dissolved small molecules are transported from blood into said separate chamber and further outside of said container under the action of suction of said suction means, said container having a urine outlet communicated with said separate chamber; and artificial ureter forming tube means connecting said urine outlet of said container with said suction means so that urine with the water and dissolved small molecules is withdrawn from said separate chamber through said artificial ureter forming tube means, said suction means including a vacuum providing vessel, said artificial ureter tube means having one end connected with said urine outlet port and another end introduced into an interior of said vacuum vessel, said vacuum vessel being formed as an elastic vessel which is squeezable by a patient and restorable under elastic action of said vessel so as to form vacuum in its interior.
Claim 2
Dependent Claim 292 words
An artificial kidney system, comprising an artificial kidney forming container having an inlet blood port connectable with a patient's artery and an outlet blood port connectable with a patient's vein so that blood from the patient's artery can flow through said inlet port into said container, then through an inner space of said container and then through said outlet blood port into the patient's vein, said inner space of said container being filled with an adsorbent for removing harmful and toxic compounds from a stream of blood flowing in said inner space from said inlet blood port to said outlet blood port, said container being provided with a separate chamber formed inside said inner space and limited by a semi-permeable polymeric ultrafiltration-type membrane which allows water and dissolved small molecules to be transported from blood into said chamber; suction means connected with said separate chamber so that the water and the dissolved small molecules are transported from blood into said separate chamber and further outside of said container under the action of suction of said suction means, said container having a urine outlet communicated with said separate chamber; and artificial ureter forming tube means connecting said urine outlet of said container with said suction means so that urine with the water and dissolved small molecules is withdrawn from said separate chamber through said artificial ureter forming tube means, said suction means including a vacuum providing vessel, said artificial ureter tube means having one end connected with said urine outlet port and another end introduced into an interior of said vacuum vessel, said vacuum vessel being formed as an elastic vessel which is squeezable by a patient and restorable under elastic action of said vessel so as to form vacuum in its interior.
Claim 3
Dependent Claim 42 words
An artificial kidney as defined in claim 1, wherein said suction means include a vacuum providing vessel, said artificial ureter tube means having one end connected with said urine outlet port and another end introduced into an interior of said vacuum vessel.
Claim 4
Dependent Claim 27 words
An artificial kidney as defined in claim 2, wherein said separate chamber has a permeable wall, said semi-permeable polymeric ultrafiltration-type membrane being arranged on said permeable wall.
Claim 5
Dependent Claim 21 words
An artificial kidney as defined in claim 3, wherein said permeable wall of said separate chamber is composed of porous material.
Claim 6
Dependent Claim 53 words
An artificial kidney as defined in claim 1; and further comprising two porous filter elements, one of said filter elements being located between said inlet port and said inner space of said container and the other of said filter elements being located between said outlet port and said inner space of said container.
Claim 7
Dependent Claim 73 words
An artificial kidney as defined in claim 1; and further comprising an arterial cannula implantable in an artery of a patient and a venous cannula implantable in a vein of a patient, said arterial cannula being connectable with said blood inlet port while said venous cannula is connectable with said blood outlet port of said container, said cannulae being also connectable with one another in an inoperative position of the artificial kidney system.
Claim 8
Dependent Claim 57 words
An artificial kidney as defined in claim 1, wherein said vacuum vessel has an opening provided with a seal; and further comprising a hollow needle connectable with said another end of said artificial ureter forming tube means and piercing said seal so as to communicate said artificial ureter tube means with the interior of said vacuum vessel.
Claim 9
Dependent Claim 273 words
An artificial kidney system, comprising an artificial kidney forming container having an inlet blood port connectable with a patient's artery and an outlet blood port connectable with a patient's vein so that blood from the patient's artery can flow through said inlet port into said container, then through an inner space of said container and then through said outlet blood port into the patient's vein, said inner space of said container being filled with an adsorbent for removing harmful and toxic compounds from a stream of blood flowing in said inner space from said inlet blood port to said outlet blood port, said container being provided with a separate chamber formed inside said inner space and limited by a semi-permeable polymeric ultrafiltration-type membrane which allows water and dissolved small molecules to be transported from blood into said chamber; suction means connected with said separate chamber so that the water and the dissolved small molecules are transported from blood into said separate chamber and further outside of said container under the action of suction of said suction means, said container having a urine outlet communicated with said separate chamber; artificial ureter forming tube means connecting said urine outlet of said container with said suction means so that urine with the water and dissolved small molecules is withdrawn from said separate chamber through said artificial ureter forming tube means, said vacuum vessel having an opening provided with a seal; and a hollow needle connectable with said another end of said artificial ureter forming tube means and piercing said seal so as to communicate said artificial ureter tube means with the interior of said vacuum vessel.
Claim 10
Dependent Claim 273 words
An artificial kidney system, comprising an artificial kidney forming container having an inlet blood port connectable with a patient's artery and an outlet blood port connectable with a patient's vein so that blood from the patient's artery can flow through said inlet port into said container, then through an inner space of said container and then through said outlet blood port into the patient's vein, said inner space of said container being filled with an adsorbent for removing harmful and toxic compounds from a stream of blood flowing in said inner space from said inlet blood port to said outlet blood port, said container being provided with a separate chamber formed inside said inner space and limited by a semi-permeable polymeric ultrafiltration-type membrane which allows water and dissolved small molecules to be transported from blood into said chamber; suction means connected with said separate chamber so that the water and the dissolved small molecules are transported from blood into said separate chamber and further outside of said container under the action of suction of said suction means, said container having a urine outlet communicated with said separate chamber; artificial ureter forming tube means connecting said urine outlet of said container with said suction means so that urine with the water and dissolved small molecules is withdrawn from said separate chamber through said artificial ureter forming tube means, said vacuum vessel having an opening provided with a seal; and a hollow needle connectable with said another end of said artificial ureter forming tube means and piercing said seal so as to communicate said artificial ureter tube means with the interior of said vacuum vessel.
Claim 11
Dependent Claim 42 words
An artificial kidney as defined in claim 8, wherein said suction means include a vacuum providing vessel, said artificial ureter tube means having one end connected with said urine outlet port and another end introduced into an interior of said vacuum vessel.
Claim 12
Dependent Claim 40 words
An artificial kidney as defined in claim 9, wherein said vacuum vessel is formed as an elastic vessel which is squeezable by a patient and restorable under elastic action of said vessel so as to form vacuum in its interior.
Claim 13
Dependent Claim 27 words
An artificial kidney as defined in claim 8, wherein said separate chamber has a permeable wall, said semi-permeable polymeric ultrafiltration-type membrane being arranged on said permeable wall.
Claim 14
Dependent Claim 21 words
An artificial kidney as defined in claim 11, wherein said permeable wall of said separate chamber is composed of porous material.
Claim 15
Dependent Claim 53 words
An artificial kidney as defined in claim 8; and further comprising two porous filter elements, one of said filter elements being located between said inlet port and said inner space of said container and the other of said filter elements being located between said outlet port and said inner space of said container.
Claim 16
Dependent Claim 73 words
An artificial kidney as defined in claim 8; and further comprising an arterial cannula implantable in an artery of a patient and a venous cannula implantable in a vein of a patient, said arterial cannula being connectable with said blood inlet port while said venous cannula is connectable with said blood outlet port of said container, said cannulae being also connectable with one another in an inoperative position of the artificial kidney system.

References Cited (Backward Citations)

US3483867A Cited
US4183811A Cited
US4312757A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1999-08-13 2000-02-12 2000-08-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2003-08-13 2004-02-12 2004-08-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2007-08-13 2008-02-12 2008-08-13 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag