US3754649A
Expired / Lapsed
US
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Artificial kidney machine
Assignee: LPT CORP
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Filing: 1971-11-17
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Granted: 1973-08-28
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Expires: 1991-11-17
Abstract
Abstract A batch-type artificial kidney machine especially adapted for home use and operation by non-professionals. The machine is automatic in operation with all functions controlled by a single four-position switch. The foregoing abstract is not to be taken either as a complete exposition or as a limitation of the present invention, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be had to the following detailed description and the accompanying drawings as well as to the claims.
Inventors
- 👤 P Palubniak
- 👤 S Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1694
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
182 words
An artificial kidney apparatus comprising: a dialyzer unit including means for passing a patient''s blood therethrough; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; a bracket for retaining the pressure pillow portion of the patient''s arterial line; a pivotally mounted switch having its switch arm in contact with said pressure pillow; screw means for adjustably positioning said switch about its pivot to vary the force between said pillow and switch arm; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; single multi-position switch means for selecting and implementing any one of said cycles; means responsive to said pivotally mounted switch for stopping the patient''s blood flow in response to a preselected physical condition; and means for indicating the existence of such preselected physical condition.
Claim 2
Dependent Claim
182 words
An artificial kidney apparatus comprising: a dialyzer unit including means for passing a patient''s blood therethrough; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; a bracket for retaining the pressure pillow portion of the patient''s arterial line; a pivotally mounted switch having its switch arm in contact with said pressure pillow; screw means for adjustably positioning said switch about its pivot to vary the force between said pillow and switch arm; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; single multi-position switch means for selecting and implementing any one of said cycles; means responsive to said pivotally mounted switch for stopping the patient''s blood flow in response to a preselected physical condition; and means for indicating the existence of such preselected physical condition.
Claim 3
Dependent Claim
173 words
An artificial kidney apparatus comprising: a dialyzer unit including means for passing a patient''s blood therethrough; a bubble chamber in said blood passing means; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; single multi-position switch means for selecting and implementing any one of said cycles; a detector head associated with said bubble chamber and responsive to blood level therein; an amplifier controlled by said detector head to produce an output signal upon variation in said blood level; relay means actuatable by said output signal; blood line clamping means operated by acTuation of said relay means; and means for indicating the existence of such blood level variation.
Claim 4
Dependent Claim
173 words
An artificial kidney apparatus comprising: a dialyzer unit including means for passing a patient''s blood therethrough; a bubble chamber in said blood passing means; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; single multi-position switch means for selecting and implementing any one of said cycles; a detector head associated with said bubble chamber and responsive to blood level therein; an amplifier controlled by said detector head to produce an output signal upon variation in said blood level; relay means actuatable by said output signal; blood line clamping means operated by acTuation of said relay means; and means for indicating the existence of such blood level variation.
Claim 5
Dependent Claim
150 words
An artificial kidney apparatus comprising: a dialyzer unit including means for passing a patient'' s blood therethrough; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; means for monitoring a patient''s condition throughout dialysis; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; a two pole switch having at least four cycle selection positions for selecting and implementing any one of said cycles; means responsive to said monitoring means for stopping the patient''s blood flow in response to a preselected physical condition; and means for indicating the existence of such preselected physical condition.
Claim 6
Dependent Claim
150 words
An artificial kidney apparatus comprising: a dialyzer unit including means for passing a patient'' s blood therethrough; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; means for monitoring a patient''s condition throughout dialysis; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; a two pole switch having at least four cycle selection positions for selecting and implementing any one of said cycles; means responsive to said monitoring means for stopping the patient''s blood flow in response to a preselected physical condition; and means for indicating the existence of such preselected physical condition.
Claim 7
Dependent Claim
166 words
An artificial kidney apparatus comprising: a dialyzer unit including motor-powered blood pump means for passing a patient''s blood therethrough; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; means for monitoring a patient''s condition throughout dialysis; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; single multiposition switch means for selecting and implementing any one of said cycles; a plurality of electrical contacts in series with the blood pump motor across a power supply, each of said contacts being operable from different monitoring means for stopping the patient'' s blood flow in response to a preselected physical condition; and means for indicating the existence of such preselected physical condition.
Claim 8
Dependent Claim
166 words
An artificial kidney apparatus comprising: a dialyzer unit including motor-powered blood pump means for passing a patient''s blood therethrough; a dialysis fluid tank; water inlet means connected to said dialysis fluid tank; means for passing dialysis fluid from said tank, through said dialyzer unit, to waste; a heater; means for recirculating a portion of the dialysis fluid in said dialyzer unit through said heater; means for monitoring a patient''s condition throughout dialysis; means for controlling each of said blood passing means, water inlet means, dialysis fluid passing means, and recirculating means in accordance with one of a plurality of preselected program cycles; single multiposition switch means for selecting and implementing any one of said cycles; a plurality of electrical contacts in series with the blood pump motor across a power supply, each of said contacts being operable from different monitoring means for stopping the patient'' s blood flow in response to a preselected physical condition; and means for indicating the existence of such preselected physical condition.
Claim 9
Dependent Claim
51 words
The apparatus of claim 4 wherein said monitoring means comprises: venous pressure measuring means for actuating a first of said electrical contacts upon an increase in venous pressure above a preselected limit and for actuating a second of said electrical contacts upon a decrease in venous pressure below a preselected limit.
Claim 10
Dependent Claim
71 words
The apparatus of claim 5 wherein said blood passing means includes a bubble chamber and wherein said monitoring means comprises: a detector head associated with said bubble chamber and responsive to blood level therein; an amplifier controlled by said detector head to produce an output signal upon variation in said blood level; relay means actuatable by said output signal; and blood line clamping means operated by actuation of said relay means.
Claim 11
Dependent Claim
58 words
The apparatus of claim 6 wherein said monitoring means comprises: a bracket for retaining the pressure pillow portion of the patient''s arterial line; a pivotally mounted switch having its switch arm in contact with said pressure pillow; and screw means for adjustably positioning said switch about its pivot to vary the force between said pillow and switch arm.
Claim 12
Dependent Claim
22 words
The apparatus of claim 7 wherein said multi-position switch means comprises a two pole switch having at least four cycle selection positions.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |