US3709222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for automatic peritoneal dialysis
Assignee: 3M Co
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Filing: 1970-12-28
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Granted: 1973-01-09
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Expires: 1990-12-28
Abstract
Abstract A method and apparatus for automatic peritoneal dialysis which includes a series of steps for the exchange of dialysate which proportions the in-flow to the out-flow and provides for the elimination of any distressing in-flow or out-flow pressures on the patient and any abnormal build-up of fluid quantity in the patient. The apparatus includes a portable bed-side unit which carries the necessary pumps and valves for the automatic cycle and includes a disposable plastic sheet unit supported on the apparatus which is positioned such that pumps and valves in the apparatus can operate on this unit when in place.
Inventors
- 👤 Vries J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:07
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/28; A61M1/15; A61M1/159; A61M1/16; A61M1/1621; A61M1/1635; A61M1/1639; A61M1/282; A61M1/71; A61M1/72; A61M1/152; A61M1/155; A61M1/156; A61M1/1562; A61M1/1565; A61M1/74; A61M1/741; A61M1/77; A61M2205/00; A61M2205/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
93 words
A method of automatic cycling of peritoneal dialysis which comprises: a. introducing a metered quantity of dialysate into a patient, b. providing a metered quantity of fresh dialysate in a first expansible, contractible, volumetric container, c. providing a second expansible, contractible, volumetric container adjacent the first container, d. confining the first and second containers within a nonexpansible volumetric housing, e. transferring a quantity of dialysate from the patient to the second container to cause ensmalling of said first container, and f. introducing fresh dialysate thus forced from said first container into the patient.
Claim 2
Independent Claim
93 words
A method of automatic cycling of peritoneal dialysis which comprises: a. introducing a metered quantity of dialysate into a patient, b. providing a metered quantity of fresh dialysate in a first expansible, contractible, volumetric container, c. providing a second expansible, contractible, volumetric container adjacent the first container, d. confining the first and second containers within a nonexpansible volumetric housing, e. transferring a quantity of dialysate from the patient to the second container to cause ensmalling of said first container, and f. introducing fresh dialysate thus forced from said first container into the patient.
Claim 3
Dependent Claim
43 words
A method as defined in claim 1 which includes interposing a third expansible-contractible container between the first container and the patient, and positioning the third container relative to the patient to cause gravity flow of dialysate from the third container to the patient.
Claim 4
Dependent Claim
41 words
A method as defined in claim 1 which includes interposing a return chamber between the patient and the second chamber, moving dialysate from the patient to the return chamber, and subsequently moving dialysate from the return chamber to the second chamber.
Claim 5
Dependent Claim
41 words
A method as defined in claim 2 which includes interposing a return chamber between the patient and the second chamber, moving dialysate from the patient to the return chamber, and subsequently moving dialysate from the return chamber to the second chamber.
Claim 6
Dependent Claim
37 words
A method as defined in claim 1 which includes providing a waste receptacle, and intermittently discharging returned dialysate to said waste chamber from said second chamber subsequent to introduction of the said dialysate into the second chamber.
Claim 7
Independent Claim
128 words
An apparatus for automatic cycling of peritoneal dialysis which comprisEs: a. a support to be positioned at the bedside of a patient, b. means on said support for holding a supply of fresh dialysate, c. a first expansible, contractible container on said support for receiving fresh dialysate from said supply, d. a second expansible, contractible container on said support directly adjacent said first container, e. a fixed volumetric chamber on said support confining the expansion of said first and second containers, f. first means to flow dialysate to and from a patient, and g. second means selectively operable to connect said first means to said second container to permit flow from a patient to said second container, and to permit flow from said first container to a patient.
Claim 8
Independent Claim
128 words
An apparatus for automatic cycling of peritoneal dialysis which comprisEs: a. a support to be positioned at the bedside of a patient, b. means on said support for holding a supply of fresh dialysate, c. a first expansible, contractible container on said support for receiving fresh dialysate from said supply, d. a second expansible, contractible container on said support directly adjacent said first container, e. a fixed volumetric chamber on said support confining the expansion of said first and second containers, f. first means to flow dialysate to and from a patient, and g. second means selectively operable to connect said first means to said second container to permit flow from a patient to said second container, and to permit flow from said first container to a patient.
Claim 9
Dependent Claim
37 words
An apparatus as defined in claim 6 in which: a. said second means includes a pressure relief chamber positionable above the patient having an inlet connected to said first chamber and an outlet connectable to a patient.
Claim 10
Dependent Claim
55 words
An apparatus as defined in claim 6 in which: a. said second means includes a return chamber to receive return flow to dialysate from said first means, and b. third means to move return dialysate from said return chamber to said second chamber to force fresh dialysate from said first chamber to said first means.
Claim 11
Dependent Claim
70 words
An apparatus as defined in claim 8 in which said third means includes: a. a pump connected in a line leading from said return chamber, b. a float valve in said line at the bottom of said return chamber to momentarily close said line when the return chamber is empty, and c. a vacuum responsive envelope in said line operable to stop said pump upon emptying of said return chamber.
Claim 12
Dependent Claim
42 words
An apparatus as defined in claim 6 in which said second means includes: a. a pump connected in a line leading from said first means, and b. a pressure relief means in said line to limit negative pressure in said first means.
Claim 13
Dependent Claim
42 words
An apparatus as defined in claim 10 in which said pump is a peristaltic pump having a positive displacement and a negative displacement cycle sequentially, and said pressure relief means comprises a collapsible envelope in said line leading from said first means.
Claim 14
Dependent Claim
46 words
An apparatus as defined in claim 6 in which: a. a hydrostatically expanded pocket is provided in a line between the supply of fresh dialysate and said first container to respond to exhaustion of supply of fresh dialysate to interrupt the function of said second means.
Claim 15
Dependent Claim
39 words
An apparatus as defined in claim 6 in which said support includes a first panel, and said containers are formed from overlaid sheets of plastic supported on said panel and heat sealed in defined areas to form said containers.
Claim 16
Dependent Claim
29 words
An apparatus as defined in claim 13 in which a plurality of collapsible connector lines are heat sealed into said plastic sheets to provide flow lines for said apparatus.
Claim 17
Dependent Claim
29 words
An apparatus as defined in claim 14 in which a plurality of valve means are supported on said panel operable to squeeze said connector lines to a close-off position.
Claim 18
Dependent Claim
36 words
An apparatus as defined in claim 15 in which a cover panel overlies said panel, and said valves operate to squeeze said connector lines against said cover panel to achieve a close-off of said connector lines.
Claim 19
Dependent Claim
31 words
An apparatus as defined in claim 13 in which said fixed volumetric chamber is formed by a predetermined area of said panel, and a relatively rigid cover portion overlying said area.
Claim 20
Dependent Claim
34 words
An apparatus as defined in claim 7 in which said relief chamber is mounted on vertically adjustable means on said support to permit regulation of hydrostatic position relative to a supply of fresh dialysate.
Claim 21
Dependent Claim
34 words
An apparatus as defined in claim 8 in which said support comprises adjustable panel means for confining the walls of said return chamber to regulate its expansion as a control means in the cycling.
Claim 22
Dependent Claim
109 words
An apparatus as defined in claim 13 in which: a. said second means includes a return chamber to receive return flow Of dialysate from said first means, b. third means to move return dialysate from said return chamber to said second chamber to force fresh dialysate from said first chamber to said first means, c. a cover panel is mounted on said support movable to a fixed position relative to said first panel, and d. a movable section is provided on said cover panel overlying said return chamber shiftable relative to said first panel to regulate the expansion of said return chamber as a control means in the cycling.
Claim 23
Dependent Claim
35 words
An apparatus as defined in claim 11 in which said pump has a plurality of rollers spaced circumferentially to provide a positive displacement cycle during only a portion of the rotative cycle of said pump.
References Cited (Backward Citations)
US2950396A
Cited
US2625933A
Cited
US2865388A
Cited
US3054401A
Cited
US3256883A
Cited
US3291151A
Cited
US3328255A
Cited
US3545438A
Cited
US3620215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |