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US4747822A
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Continuous flow peritoneal dialysis system and method
Assignee: Individual
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Filing: 1986-05-02
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Granted: 1988-05-31
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Expires: 2006-05-02
Abstract
Abstract A continuous flow peritoneal dialysis system and process is disclosed which includes a source of sterilized peritoneal dialysis system in the form of a gravity feed head vessel (32). A by-pass valve (34) connects the head vessel to an inflow/outflow directional valve 40 which controls the inflow and outflow of the sterilized dialysis fluid to a peritoneal catheter (12). The peritoneal catheter is implanted into the peritoneal membrane (14) of the peritoneal cavity (15). A connectable/disconnectable inflow line (42) and outflow line (48) are connected to an inflow catheter (44) and outflow catheter (46), respectively, of the double peritoneal catheter (12). A pressure monitor (50) in the outflow line (48) monitors the pressure within the cavity (15) and adjusts the inflow and outflow accordingly to maintain a predetermined volume and pressure of dialysis fluid in the cavity to maintain the membrane (14) properly distended at all times for maximum dialysis efficiency and patient comfort. Secondarily, an outflow monitor (54) monitors the outflow and if need be, increases or decreases the inflow to the directional valve (40) by controlling a by-pass valve 34. Control of the level of dialysis fluid in the head vessel (32) is maintained by a level monitor (38) which also can operate the by-pass valve (34) to by-pass fluid to a drain tank (36). Sterile dialysis fluid flows through the cavity (15) in an open single-pass circuit and flows into the disposal and drain tank (36) upon passing through the cavity.
Inventors
- 👤 Alan M. Peabody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:37
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/28; A61M1/281; A61M1/282; A61M1/284; A61M1/285; A61M1/287; A61M1/16; A61M1/168; A61M1/1686; A61M1/71; A61M1/74; A61M2205/00; A61M2205/33; A61M2205/3331; Y; Y10; Y10S; Y10S128/00; Y10S128/13
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
132 words
A continuous flow peritoneal dialysis process comprising: providing a source of sterilized dialysis fluid; providing an inflow line for connection to a catheter adapted for implantation into the peritoneal cavity of a patient; providing an outflow line for connection to said catheter; delivering a flow of sterilized dialysis fluid from said course to said inflow line; monitoring a function of the volume of said sterile dialysis fluid in said peritoneal cavity and controlling the inflow and outflow of said sterilized dialysis fluid so that a desired volume exists in said cavity in a manner that proper amount of fluid is maintained during dialysis; and delivering said outflow of sterilized dialysis fluid to a disposal means so that a single flow of dialysis fluid is provided through the peritoneal cavity of said patient.
Claim 2
Dependent Claim
132 words
A continuous flow peritoneal dialysis process comprising: providing a source of sterilized dialysis fluid; providing an inflow line for connection to a catheter adapted for implantation into the peritoneal cavity of a patient; providing an outflow line for connection to said catheter; delivering a flow of sterilized dialysis fluid from said course to said inflow line; monitoring a function of the volume of said sterile dialysis fluid in said peritoneal cavity and controlling the inflow and outflow of said sterilized dialysis fluid so that a desired volume exists in said cavity in a manner that proper amount of fluid is maintained during dialysis; and delivering said outflow of sterilized dialysis fluid to a disposal means so that a single flow of dialysis fluid is provided through the peritoneal cavity of said patient.
Claim 3
Dependent Claim
51 words
The process of claim 1 including providing a double catheter having an inflow catheter connected to said inflow line and an outflow catheter connected to said outflow line implanted in said peritoneal cavity; and providing a valve means for controlling the flow of dialysis fluid in said inflow and outflow lines.
Claim 4
Dependent Claim
84 words
The process of claim 2 including providing said valve means in the form of an inflow valve in said inflow line and an outflow valve in said outflow line for controlling said inflow and outflow of said dialysis fluid from said peritoneal cavity: and providing a flow monitor in each said inflow and outflow line to monitor said function of the volume for controlling said inflow and outflow valve to maintain said desired volume of dialysis fluid in said cavity for proper cavity distension.
Claim 5
Dependent Claim
45 words
The process of claim 2 including monitoring the amount of said dialysis fluid in said peritoneal cavity for controlling said valve means and providing an alarm signal in response to the amount of fluid exceeding a prescribed level to avoid over distension of said cavity.
Claim 6
Dependent Claim
53 words
The process of claim 2 wherein monitoring a function of the volume of dialysis fluid in said peritoneal cavity includes monitoring the pressure of said sterile dialysis fluid in said peritoneal cavity and controlling the inflow and outflow of said sterilized dialysis fluid so that a desired pressure is maintained in said cavity.
Claim 7
Dependent Claim
38 words
The process of claim 5 including monitoring the outflow of said dialysis fluid from said peritoneal cavity and controlling the inflow of dialysis fluid into said peritoneal cavity in response thereto to make said inflow and outflow equal.
Claim 8
Dependent Claim
52 words
The process of claim 2 wherein said valve means is provided by an inflow/outflow directional valve for controlling said inflow and outflow of said dialysis fluid from said peritoneal cavity; and providing a monitor in said outflow line for controlling said inflow/outflow directional valve responsive to the pressure in said peritoneal cavity.
Claim 9
Dependent Claim
54 words
The process of claim 1 wherein monitoring a function of the volume of dialysis fluid in said peritoneal cavity includes providing a flow monitor in each of said inflow and outflow lines and controlling the inflow ad outflow of sterilized dialysis fluid so that a desired volume of fluid exists in said peritoneal cavity.
Claim 10
Dependent Claim
36 words
The process of claim 1 including controlling said flow of dialysis fluid in said inflow and outflow lines so that dialysis fluid flows in and then out of said peritoneal cavity in a continuous cyclic manner.
Claim 11
Dependent Claim
52 words
The process of claim 1 wherein the provision of said sources of sterilized dialysis fluid includes providing a head vessel for containing said dialysis fluid, and maintaining the level of said sterilized dialysis fluid in said head vessel by delivering fluid to said disposal means when said level reaches a certain height.
Claim 12
Dependent Claim
61 words
The process of claim 1 including providing a valve means in said inflow and outflow lines for selectively controlling said inflow and outflow of dialysis fluid; and providing a first flow monitor in said inflow line and a second flow monitor in said outflow line for controlling said valve means and flow of dialysis fluid in said inflow and outflow line.
Claim 13
Dependent Claim
39 words
The process of claim 11 including controlling said valve means in a cyclic manner so that sterilized dialysis fluid is delivered into said peritoneal cavity and then out of said cavity in continuous cycles through said single pass circuit.
Claim 14
Dependent Claim
33 words
The process of claim 12 including closing said outflow line when dialysis fluid is flowing into said peritoneal cavity and closing said inflow line while said fluid is flowing out of said cavity.
Claim 15
Dependent Claim
164 words
A continuous flow peritoneal dialysis system comprising: a source of sterile dialysis fluid; an inflow line adapted for connection to said source and to a peritoneal catheter implanted in the peritoneal cavity of a patient; an outflow line adapted for connection to said peritoneal catheter; valve means for controlling the flow of dialysis fluid in said inflow and outflow lines to thereby control the volume of dialysis fluid in said peritoneal cavity; and disposal means connected to said outflow line for disposing of said outflow of dialysis fluid and establishing a single-pass open circuit through said peritoneal cavity of for dialysis; flow monitoring means for sensing a function of the volume and amount of dialysis fluid in said peritoneal cavity; and control means controlling said valve means in response to said flow monitoring means so that flow of said dialysis fluid through said peritoneal cavity is controlled in a manner that a desired amount of fluid exists in said peritoneal cavity for proper dialysis.
Claim 16
Dependent Claim
164 words
A continuous flow peritoneal dialysis system comprising: a source of sterile dialysis fluid; an inflow line adapted for connection to said source and to a peritoneal catheter implanted in the peritoneal cavity of a patient; an outflow line adapted for connection to said peritoneal catheter; valve means for controlling the flow of dialysis fluid in said inflow and outflow lines to thereby control the volume of dialysis fluid in said peritoneal cavity; and disposal means connected to said outflow line for disposing of said outflow of dialysis fluid and establishing a single-pass open circuit through said peritoneal cavity of for dialysis; flow monitoring means for sensing a function of the volume and amount of dialysis fluid in said peritoneal cavity; and control means controlling said valve means in response to said flow monitoring means so that flow of said dialysis fluid through said peritoneal cavity is controlled in a manner that a desired amount of fluid exists in said peritoneal cavity for proper dialysis.
Claim 17
Dependent Claim
31 words
The system of claim 14 wherein said peritoneal catheter includes a double catheter having an inflow catheter connected to said inflow line and an outflow catheter connected to said outflow line.
Claim 18
Dependent Claim
67 words
The system of claim 15 wherein said flow monitoring means comprises: pressure monitoring means in the outflow line for sensing the pressure of dialysis fluid in said peritoneal cavity, and said control means controlling said valve means in response to said pressure monitoring means so that flow of said dialysis fluid through said peritoneal cavity is controlled to maintain a desired pressure of fluid in said cavity.
Claim 19
Dependent Claim
44 words
The system of claim 15 including a bypass valve connected between said source and said valve means and between said source and said disposal means, and means controlling said bypass valve to adjust the flow of sterile dialysis fluid delivered to said valve means.
Claim 20
Dependent Claim
40 words
The system of claim 15 wherein said flow monitor means includes a monitor for sensing the outflow of dialysis fluid from said outflow catheter and controlling said valve means so that said inflow and outflow of dialysis fluid are equal.
Claim 21
Dependent Claim
57 words
The system of claim 15 wherein said flow monitor means includes a flow monitor in each of said inflow and outflow lines for sensing the flow through said peritoneal cavity and said control means controls said valve means and the inflow and outflow of dialysis fluid to maintain a desired volume of fluid in said peritoneal cavity.
Claim 22
Dependent Claim
88 words
The system of claim 15 wherein said valve means includes: an inflow/outflow valve having an inflow passage connected to said inflow line and an outflow passage connected to said outflow line; a valve element for selectively occluding either said inflow passage or said outflow passage; and said flow monitoring means comprises a pressure monitor for sensing the fluid pressure in said peritoneal cavity and controlling said inflow/outflow valve to occlude either said inflow or outflow passage to regulate the pressure in said peritoneal cavity within a desired range.
Claim 23
Dependent Claim
72 words
The system of claim 20 wherein said flow control means further includes a flow monitor for monitoring the outflow of said dialysis fluid from said inflow/outflow valve and controlling the inflow of dialysis to said valve when both said inflow and outflow passages are open so that the inflow of said dialysis fluid delivered through said valve to said peritoneal cavity and said outflow of dialysis fluid from said cavity are equal.
Claim 24
Dependent Claim
89 words
The system of claim 15 including: said source including a head vessel in which said sterilized dialysis fluid is stored: a bypass valve connected between said head vessel and said valve means; a drain line connecting said bypass valve to a disposal means; and flow level sensing means communicating with an interior of said head vessel and controlling said bypass valve to bypass said dialysis fluid from said head vessel to said disposal means should the level of said dialysis fluid reach a predetermined height in said head vessel.
Claim 25
Dependent Claim
35 words
The system of claim 14 including fluid level sensing means for sensing the amount of dialysis fluid in said cavity and producing an alarm signal in the event overfilling and overdistension of said cavity occurs.
Claim 26
Dependent Claim
48 words
The system of claim 14 wherein said inflow lines and outflow lines are connected to said valve means; and said valve means selectively opens and closes said inflow and outflow lines to deliver a prescribed amount of dialysis fluid through said peritoneal cavity in a continuous cyclic manner.
Claim 27
Dependent Claim
114 words
The system of claim 14 wherein said valve means includes: an inflow/outflow valve having an inflow passage connected to said inflow line and an outflow passage connected to said outflow line; a valve element for selectively occluding either said inflow passage or said outflow passage; and said flow monitoring means comprises a flow monitor in each of said inflow and outflow lines for sensing the fluid flow in said flow lines and controlling said inflow/outflow valve to occlude either said inflow or outflow passage in a manner that a prescribed amount of dialysis fluid is delivered into said peritoneal cavity and then removed through said outflow passage and line in a continuous cyclic manner.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |