EP0104895A2
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EP
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Dual phase blood/flow system and method of operation
Assignee: Janssen Pharmaceuticals Inc
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Filing: 1983-09-22
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Granted: —
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Expires: 2003-09-22
Abstract
Abstract A blood flow system for processing blood has two phases of operation, an arterial phase and a venous phase. During the arterial phase, the system is filled with blood through operation of an arterial blood pump. When a predetermined blood pressure level in the system has been attained, the arterial blood pump is inactivated and a venous blood pump removes blood from the system for a given number of pump turns.
Inventors
- 👤 Vernon H. Troutner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/30; A61M1/301; A61M1/302; A61M1/303; A61M1/305; A61M1/306; A61M1/308; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
185 words
A blood processing system for a patient comprising: means for withdrawing blood from said patient; a first arterial blood pump having an input coupled to said withdrawing means and an output at which a flow of blood is provided when said pump is activated; means for processing blood having an input coupled to the output of said arterial blood pump and an output at which a flow of processed blood is produced; a second venous blood pump having an input coupled to the output of said blood processing system, and an output; means, coupled to the output of said venous blood pump, for returning processed blood to said patient, wherein said blood processing system exhibits a given blood capacity when full; a monitor coupled to said blood processing system for detecting the attainment of said given blood capacity; and blood pump control means, coupled to said pumps and said monitor, for activating said venous blood pump upon detection of said given blood capacity, and for activating said arterial blood pump after said venous blood pump has been activated for a given number of operating cycles.
Claim 2
Dependent Claim
185 words
A blood processing system for a patient comprising: means for withdrawing blood from said patient; a first arterial blood pump having an input coupled to said withdrawing means and an output at which a flow of blood is provided when said pump is activated; means for processing blood having an input coupled to the output of said arterial blood pump and an output at which a flow of processed blood is produced; a second venous blood pump having an input coupled to the output of said blood processing system, and an output; means, coupled to the output of said venous blood pump, for returning processed blood to said patient, wherein said blood processing system exhibits a given blood capacity when full; a monitor coupled to said blood processing system for detecting the attainment of said given blood capacity; and blood pump control means, coupled to said pumps and said monitor, for activating said venous blood pump upon detection of said given blood capacity, and for activating said arterial blood pump after said venous blood pump has been activated for a given number of operating cycles.
Claim 3
Dependent Claim
177 words
A blood processing system for a patient comprising: means for withdrawing blood from said patient; a first arterial blood pump having an input coupled to said withdrawing means and an output at which a flow of blood is provided when said pump is activated; means for processing blood having an input coupled to the output of said arterial blood pump and an output at which a flow of processed blood is produced; a second venous blood pump having an input coupled to the output of said blood processing system, and an output; means, coupled to the output of said,venous blood pump, for returning processed blood to said patient; a pressure monitor coupled to said blood processing system for detecting the blood pressure therein; and blood pump control means, coupled to said punps and said monitor, for activating said venous blood pump when said detected blood pressure of said blood processing system attains a given threshold, and for activating said arterial blood pump after said venous blood pump has been activated for a given number of operating cycles.
Claim 4
Dependent Claim
177 words
A blood processing system for a patient comprising: means for withdrawing blood from said patient; a first arterial blood pump having an input coupled to said withdrawing means and an output at which a flow of blood is provided when said pump is activated; means for processing blood having an input coupled to the output of said arterial blood pump and an output at which a flow of processed blood is produced; a second venous blood pump having an input coupled to the output of said blood processing system, and an output; means, coupled to the output of said,venous blood pump, for returning processed blood to said patient; a pressure monitor coupled to said blood processing system for detecting the blood pressure therein; and blood pump control means, coupled to said punps and said monitor, for activating said venous blood pump when said detected blood pressure of said blood processing system attains a given threshold, and for activating said arterial blood pump after said venous blood pump has been activated for a given number of operating cycles.
Claim 5
Dependent Claim
45 words
The blood processing system of Claim 1 or 2, wherein said processing means comprises a dialyzer for performing hemodialysis, and further comprising: a flexible blood accumulator coupled between said dialyzer and said second venous blood pump, said accumulator exhibiting a known blood capacity when full.
Claim 6
Dependent Claim
31 words
1, 2 or 4. The blood processing system of Claim/3, wherein said monitor comprises a pressure transducer coupled between said dialyzer and said venous blood pump for measuring venous blood pressure.
Claim 7
Dependent Claim
46 words
any one of 5. The blood processing system of Claims/I to 4 further comprising: means, coupled between said venous blood pump and said blood pump control means, for detecting operating cycles of said venous blood pump and communicating said operating cycle information to said control means.
Claim 8
Dependent Claim
26 words
The blood processing system of Claim 5, wherein said blood pump control means includes a microprocessor, and wherein said operating cycle detecting·means includes a slot encoder.
Claim 9
Independent Claim
94 words
A method of operating a henodialysis system which includes a dialyzer, an arterial blood pump coupled to pump blood between a patient and an input of the dialyzer, and a venous blood pump coupled to pump blood between an output of the dialyzer and the patient, said method comprising the steps of: a) activiating said arterial blood pump while said venous pump is inactive until said system contains a given volume of blood; and b) activating said venous blood pump while said arterial pump is inactive for a predetermined number of pump operating cycles.
Claim 10
Independent Claim
94 words
A method of operating a henodialysis system which includes a dialyzer, an arterial blood pump coupled to pump blood between a patient and an input of the dialyzer, and a venous blood pump coupled to pump blood between an output of the dialyzer and the patient, said method comprising the steps of: a) activiating said arterial blood pump while said venous pump is inactive until said system contains a given volume of blood; and b) activating said venous blood pump while said arterial pump is inactive for a predetermined number of pump operating cycles.
Claim 11
Dependent Claim
58 words
The method of Claim 7 wherein said system exhibits a given blood capacity when full of blood, and wherein step a) ·comprises the step of a) activating said arterial blood pump while said venous pump is inactive until said system contains a given volume of blood which is substantially equal to the capacity of the system when full.
Claim 12
Independent Claim
99 words
A method of operating a hemodialysis system which includes a dialyzer, an arterial blood pump coupled to pump blood between a patient and an input of the dialyzer, and a venous blood pump coupled to pump blood between an output of the dialyzer and the patient, said method comprising the steps of: a) activating said arterial blood pump while said venous pump is inactive until the blood pressure in the system between said blood pumps attains a given level; and b) activating said venous blood pump while said arterial pump is inactive for a predetermined number of operating cycles.
Claim 13
Independent Claim
99 words
A method of operating a hemodialysis system which includes a dialyzer, an arterial blood pump coupled to pump blood between a patient and an input of the dialyzer, and a venous blood pump coupled to pump blood between an output of the dialyzer and the patient, said method comprising the steps of: a) activating said arterial blood pump while said venous pump is inactive until the blood pressure in the system between said blood pumps attains a given level; and b) activating said venous blood pump while said arterial pump is inactive for a predetermined number of operating cycles.
Claim 14
Independent Claim
118 words
A method of operating a hemodialysis system which includes a dialyzer, an arterial blood pump coupled to pump blood between a patient and an input of the dialyzer, and a venous blood pump coupled to pump blood between an output of the dialyzer and the patient, said method comprising the steps of: a) activating said arterial blood pump while said venous pump is inactive and the blood pressure at said . output of said dialyzer remains substantially equal to atmospheric pressure and, when said blood pressure at the output of said dialyzer increases a predetermined amount above atmospheric pressure, b) activating said venous blood pump while said arterial pump is inactive for a predetermined number of pump turns.
Claim 15
Independent Claim
118 words
A method of operating a hemodialysis system which includes a dialyzer, an arterial blood pump coupled to pump blood between a patient and an input of the dialyzer, and a venous blood pump coupled to pump blood between an output of the dialyzer and the patient, said method comprising the steps of: a) activating said arterial blood pump while said venous pump is inactive and the blood pressure at said . output of said dialyzer remains substantially equal to atmospheric pressure and, when said blood pressure at the output of said dialyzer increases a predetermined amount above atmospheric pressure, b) activating said venous blood pump while said arterial pump is inactive for a predetermined number of pump turns.
References Cited (Backward Citations)
No citation records indexed.
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