US3871913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning of dialyser compartments and blood lines of artificial kidney machine
Assignee: Gambro Ltd
•
Filing: 1973-02-13
•
Granted: 1975-03-18
•
Expires: 1993-02-13
Abstract
Abstract A system for supplying a blood dialyser with dialysing fluid with connections enabling the system to be connected with the dialyser blood compartment, so that after a dialysing treatment, the supply system can be used to supply washing and sterilizing liquid both to the blood compartment and the dialysate compartment of the dialyser.
Inventors
- 👤 Stanley Shaldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:20
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/168; A61M1/169; A61M1/1682; A61M1/1684; A61M1/36; A61M1/3621; A61M1/3643; A61M1/3644; A61M1/365
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A METHOD OF WASHING A BLOOD DIALYSER OF AN ARTIFICIAL KIDNEY MACHINE OF THE TYPE HAVING A SUPPLY SYSTEM WHICH PRODUCES DIALYSATE BY MIXING WATER WITH METERED QUANTITIES OF DIALYSATE CONCENTRATE AND HEATS AND DEAERATES THE RESULTANT MIXTURE, SAID DIALYSER HAVING A BLOOD COMPARTMENT AND A DIALYSATE COMPARTMENT, SAID METHOD COMPRISING THE STEPS OF: A. CONNECTING THE BLOOD COMPARTMENT OF SAID DIALYSER TO SAID DIALYSATE COMPARTMENT, SAID METHOD COMPRISING THE STEPS OF: B. USING LIQUID FROM SAID SUPPLY SYSTEM TO WASH BOTH THE BLOOD AND DIALYSATE COMPARTMENTS OF SAID DIALYSER.
Claim 2
Independent Claim
90 words
A METHOD OF WASHING A BLOOD DIALYSER OF AN ARTIFICIAL KIDNEY MACHINE OF THE TYPE HAVING A SUPPLY SYSTEM WHICH PRODUCES DIALYSATE BY MIXING WATER WITH METERED QUANTITIES OF DIALYSATE CONCENTRATE AND HEATS AND DEAERATES THE RESULTANT MIXTURE, SAID DIALYSER HAVING A BLOOD COMPARTMENT AND A DIALYSATE COMPARTMENT, SAID METHOD COMPRISING THE STEPS OF: A. CONNECTING THE BLOOD COMPARTMENT OF SAID DIALYSER TO SAID DIALYSATE COMPARTMENT, SAID METHOD COMPRISING THE STEPS OF: B. USING LIQUID FROM SAID SUPPLY SYSTEM TO WASH BOTH THE BLOOD AND DIALYSATE COMPARTMENTS OF SAID DIALYSER.
Claim 3
Dependent Claim
71 words
A method as recited in claim 1 wherein the step of connecting the blood compartment of said dialyser to said dialysate supply system is accomplished by connecting ends of a blood circuit, said ends previously having been attached to a patient''s blood supply, containing said blood compartment and a blood pump to said dialysate supply system so that said blood pump circulates liquid from said supply system through said blood circuit.
Claim 4
Dependent Claim
21 words
A method as recited in claim 1 wherein the washing liquid for both said compartments of said dialyser initially comprises dialysate.
Claim 5
Dependent Claim
37 words
A method as recited in claim 3 wherein the method comprises the additional step of washing both said compartments of said dialyser with pure heated and deaerated water from said supply system after said washing with dialysate.
Claim 6
Dependent Claim
41 words
A method as recited in claim 1 wherein the method comPrises the additional step of providing a sterilizing medium to said supply system to supply said sterilizing medium to both said compartments of said dialyser after said washing of said compartments.
Claim 7
Dependent Claim
85 words
A dialysate supply system for an artificial kidney machine with a dialyser having a blood circuit including blood supply lines and blood and dialysate compartments, said supply system comprising means for producing dialysate by mixing water with metered quantities of dialysate concentrate and heating and deaerating the mixture, and connection means for connecting said supply system with said dialyser blood circuit so that after a blood dialysate treatment liquid from said supply system can be delivered to said dialyser blood compartment for washing said compartment.
Claim 8
Dependent Claim
85 words
A dialysate supply system for an artificial kidney machine with a dialyser having a blood circuit including blood supply lines and blood and dialysate compartments, said supply system comprising means for producing dialysate by mixing water with metered quantities of dialysate concentrate and heating and deaerating the mixture, and connection means for connecting said supply system with said dialyser blood circuit so that after a blood dialysate treatment liquid from said supply system can be delivered to said dialyser blood compartment for washing said compartment.
Claim 9
Dependent Claim
28 words
A system as claimed in claim 6, including a pair of dialysate header tanks in liquid-flow communication wherein said connection means comprise a connection leading into each tank.
Claim 10
Dependent Claim
22 words
A system as claimed in claim 7, wherein one of said tanks is an overflow tank from the other of said tanks.
Claim 11
Independent Claim
30 words
A system as claimed in any of claims 6 including means for introducing a sterilizing medium into the system and hence into said blood and dialysate compartments of said dialyser.
References Cited (Backward Citations)
US3441136A
Cited
US3753493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |