US4353368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for hemodialysis
Assignee: Czech Technical University in Prague
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Filing: 1980-08-19
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Granted: 1982-10-12
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Expires: 2000-08-19
Abstract
Abstract A device for hemodialysis provided with: an artery needle, a set of hoses with a bubble trap, a blood pump, a hemodialyzer, a venous needle, a container of a dialyzing solution, a conduit for the dialyzing solution, a unit of sensors for measuring the temperature, conductivity, and pressure of the dialyzing solution, a pump for the dialyzing solution, a hemoglobin detector, an electronic unit and an alarm unit providing audible and visual warning signals. The dialyzing solution is heated to a suitable temperature by a heat exchanger which is supplied with waste heat from the cooling system of an automobile engine. The device may be used in a home and for weekend dialysis, as well as for emergency mobile use.
Inventors
- 👤 Petr Slovak
- 👤 Hana Becvarova
- 👤 Milan Ruml
- 👤 Jiri Kracik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:33
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1654; A61M1/1656; A61M1/166; A61M1/1662; A61M1/1668
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
A device for hemodialysis comprising a first, arterial blood conducting circuit means comprising an arterial needle adapted to be inserted into an artery of a patient, a first, blood pump means for forwarding blood from the arterial needle, a hemodialyzer having a first chamber receiving arterial blood from the blood pump, a bubble trap receiving arterial blood from the first chamber of the hemodialyzer, and a venous needle receiving arterial blood from the bubble trap, a second, dialyzing solution conducting circuit means comprising a container holding a dialyzing solution, a solution conducting unit containing sensors, a second chamber of the hemodialyzer, a second dialyzing solution pump means for moving the dialyzing solution from the dialyzing solution container through the unit containing sensors into the second chamber of the hemodialyzer, a hemoglobin detector connected to an outlet of said second pump means, an electronic unit provided with acoustic and optical alarms indicating malfunctions of the hemodialysis device, said electronic unit comprising at least two electrodes in the dialyzing solution, and an A.C. power source means connected to said electrodes for providing a sufficient electrical output to said electrodes which is variable in both frequency and amplitude to inhibit the growth of bacteria in the dialyzing solution.
Claim 2
Independent Claim
205 words
A device for hemodialysis comprising a first, arterial blood conducting circuit means comprising an arterial needle adapted to be inserted into an artery of a patient, a first, blood pump means for forwarding blood from the arterial needle, a hemodialyzer having a first chamber receiving arterial blood from the blood pump, a bubble trap receiving arterial blood from the first chamber of the hemodialyzer, and a venous needle receiving arterial blood from the bubble trap, a second, dialyzing solution conducting circuit means comprising a container holding a dialyzing solution, a solution conducting unit containing sensors, a second chamber of the hemodialyzer, a second dialyzing solution pump means for moving the dialyzing solution from the dialyzing solution container through the unit containing sensors into the second chamber of the hemodialyzer, a hemoglobin detector connected to an outlet of said second pump means, an electronic unit provided with acoustic and optical alarms indicating malfunctions of the hemodialysis device, said electronic unit comprising at least two electrodes in the dialyzing solution, and an A.C. power source means connected to said electrodes for providing a sufficient electrical output to said electrodes which is variable in both frequency and amplitude to inhibit the growth of bacteria in the dialyzing solution.
Claim 3
Dependent Claim
47 words
A device for hemodialysis as claimed in claim 1, further comprising heat exchanger means having a first chamber connected to said dialyzing solution container and a second chamber adapted to be connected to a source of waste heat from an automobile engine for heating said dialyzing solution.
Claim 4
Dependent Claim
28 words
A device for hemodialysis as claimed in claim 2, further comprising a source of electrical pulses triggered into operation by hand and electrodes connected to a patient's body.
Claim 5
Dependent Claim
30 words
A device for hemodialysis as claimed in claim 1, further comprising a source of electrical stimulating pulses, and at least two electrodes adapted to be connected to a patient's body.
Claim 6
Dependent Claim
26 words
A device for hemodialysis as claimed in claim 3, wherein said source of electrical stimulating pulses is triggered into operation by said optical and acoustic alarms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |