Patent EP0097432A2 successfully refreshed from Google Patents.
EP0097432A2
Expired / Lapsed
EP
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Apparatus for peritoneal dialysis
Assignee: Individual
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Filing: 1983-05-25
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Granted: —
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Expires: 2003-05-25
Abstract
Abstract There is provided a dialysis apparatus which includes' first means for supplying dialysis fluid, second means for receiving, heating and weighing dialysis fluid, third means for receiving and weighing a quantity of dialysis fluid, a catheter, and structure which supports the first means above the second means, the second means above the catheter, and the third means below the catheter. A first flow path interconnects the first and second means, while a second flow path interconnects the second means in the catheter. A third flow path interconnects the catheter in the third means. Valve means are provided for selectively (i) blocking the first and third paths while leaving the second path open, (ii) blocking the second and third paths while leaving the first path open, and (iii) blocking the second path while leaving the first and third paths open. A timer/computer is provided which is able to maintain mode (i) until a preselected reduction in weight occurs at the second means, following which it switches to and maintains mode (ii), following which it switches to and maintains mode (iii).
Inventors
- 👤 Joseph E. Dadson
- 👤 Mahesh C. Agarwal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:37
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/28; A61M1/16; A61M1/1621; A61M1/1643; A61M1/282; A61M2205/00; A61M2205/33; A61M2205/3379; A61M2205/3393
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
187 words
A dialysis apparatus comprising: first means for supplying dialysis fluid, second means for receiving and heating dialysis fluid, third means for receiving and weighing a quantity of dialysis fluid, a catheter, structure supporting said first means above said second means, said second means above said catheter, and said third means below said catheter, a first fluid flow path interconnecting said first and second means, a second fluid flow path interconnecting said second means and said catheter, a third fluid flow path interconnecting said catheter and said third means, characterized in that, the second means is also capable of weighing dialysis fluid, and the apparatus further includes valve means for selectively (i) blocking said first and third paths while leaving said second path open, (ii) blocking said second and third paths while leaving the first path open, and (iii) blocking the second path while leaving the first and third paths open, and timer/computer means for (a) maintaining mode (i) until a preselected reduction in weight occurs at said second means, (b) then switching to and maintaining mode (ii) , (c) then switching to and maintaining mode (iii) .
Claim 2
Dependent Claim
187 words
A dialysis apparatus comprising: first means for supplying dialysis fluid, second means for receiving and heating dialysis fluid, third means for receiving and weighing a quantity of dialysis fluid, a catheter, structure supporting said first means above said second means, said second means above said catheter, and said third means below said catheter, a first fluid flow path interconnecting said first and second means, a second fluid flow path interconnecting said second means and said catheter, a third fluid flow path interconnecting said catheter and said third means, characterized in that, the second means is also capable of weighing dialysis fluid, and the apparatus further includes valve means for selectively (i) blocking said first and third paths while leaving said second path open, (ii) blocking said second and third paths while leaving the first path open, and (iii) blocking the second path while leaving the first and third paths open, and timer/computer means for (a) maintaining mode (i) until a preselected reduction in weight occurs at said second means, (b) then switching to and maintaining mode (ii) , (c) then switching to and maintaining mode (iii) .
Claim 3
Dependent Claim
77 words
The invention claimed in claim 1, in which the timer/computer means is further adapted to (d) calculate and display an ultrafiltration quantity, if any, by computing the difference between said preselected reduction in weight at said second means during mode (i) and the weight of the quantity of fluid received at said third means during the next following mode (iii), and in which each of modes (ii) and (iii) is maintained for a preselected period of time.
Claim 4
Dependent Claim
39 words
The invention claimed in claim 2, in which the timer/computer means is further adapted to (e) generate an alarm signal if the ultrafiltration calculated in (d) exceeds a predetermined amount, and has means for manually selecting said predetermined amount.
Claim 5
Dependent Claim
48 words
The invention claimed in claim 1, claim 2 or claim 3, which further includes a fourth flow path for fluid draining from said third means, and in which the valve means opens the fourth path in modes (i) and (ii), and closes the fourth path in mode (iii).
Claim 6
Dependent Claim
45 words
The invention claimed in claim 1, claim 2 or claim 3, in which the portion of the valve means which closes the first and second paths includes a simple reciprocating element which closes one of said first and second paths while leaving the other open.
Claim 7
Dependent Claim
69 words
The invention claimed in claim 1, claim 2 or claim 3, which further includes a fourth flow path for fluid draining from said third means, and in which the valve means includes a single reciprocating element which opens one of the third and fourth paths while closing the other, the valve means opening the fourth path in modes (i) and (ii) and closing the fourth path in mode (iii).
Claim 8
Dependent Claim
21 words
The invention claimed in claim 1, claim 2 or claim 3, in which the third flow path includes a drip chamber.
Claim 9
Dependent Claim
22 words
8: The invention claimed in claim 1, claim 2 or claim 3, in which the second flow path includes a drip chamber.
Claim 10
Dependent Claim
18 words
The invention claimed in claim 1, in which both the second and third flow paths include drip chambers.
Claim 11
Dependent Claim
21 words
The invention claimed in claim 1, claim 2 or claim 9, in which the flow paths are defined by flexible tubing.
Claim 12
Dependent Claim
91 words
The invention claimed in claim 1, claim 2 or claim 3, in which the timer/computer means generates alarm signals if, during mode (iii) the rate at which the weight of collected fluid at the third means increases is not above a predetermined threshold rate, or if, by the end of the second preselected period of time, the said preselected reduction in weight at said second means during mode (i) is greater than the weight of the total quantity of fluid collected at said third means during the next following mode (iii).
Claim 13
Dependent Claim
39 words
The invention claimed in claim 1, claim 2 or claim 3, in which the timer/computer means generates an alarm signal if during mode (i) the rate of reduction of weight at said second means is below a predetermined threshold.
Claim 14
Independent Claim
312 words
A method of peritoneal dialysis utilizing a dialysis apparatus comprising first means for supplying dialysis fluid, second means for receiving and heating dialysis fluid, third means for receiving and weighing a . quantity of dialysis fluid, a catheter connected to the peritoneal cavity of a patient, structure supporting said first means above said second means, said second means above said catheter and said third means below said catheter, means defining a first fluid flow path interconnecting said first and second means, means defining a second fluid flow path interconnecting said second means and said catheter, and means defining a third fluid flow path interconnecting said catheter and said third means, characterized in that, the second means is also adapted to weigh dialysis fluid, the method including the following steps in rotational sequence: (i) blocking said first and third paths while leaving the second path open, until a preselected reduction in weight occurs at said second means, whereby a quantity of dialysis fluid corresponding to the reduction in weight passes by gravity along said second flow path into the peritoneal cavity of the patient, .(ii) blocking said second and third paths while leaving said first path open, whereby to initiate replenishment of fresh dialysis fluid in the second means from the first means along said first flow path, while maintaining dialysis fluid in the peritoneal cavity of the patient, and (iii) blocking said second path while leaving the first and third paths open, whereby fresh dialysis fluid continues to pass along said first path from the first means to the second means, and simultaneously dialysis fluid from the peritoneal cavity of the patient drains along the catheter and said third path into said third means, mode (i) constituting the fill mode for the patient, mode (ii) constituting the dwell mode for the patient, and mode (iii) constituting the drain mode for the patient.
Claim 15
Independent Claim
312 words
A method of peritoneal dialysis utilizing a dialysis apparatus comprising first means for supplying dialysis fluid, second means for receiving and heating dialysis fluid, third means for receiving and weighing a . quantity of dialysis fluid, a catheter connected to the peritoneal cavity of a patient, structure supporting said first means above said second means, said second means above said catheter and said third means below said catheter, means defining a first fluid flow path interconnecting said first and second means, means defining a second fluid flow path interconnecting said second means and said catheter, and means defining a third fluid flow path interconnecting said catheter and said third means, characterized in that, the second means is also adapted to weigh dialysis fluid, the method including the following steps in rotational sequence: (i) blocking said first and third paths while leaving the second path open, until a preselected reduction in weight occurs at said second means, whereby a quantity of dialysis fluid corresponding to the reduction in weight passes by gravity along said second flow path into the peritoneal cavity of the patient, .(ii) blocking said second and third paths while leaving said first path open, whereby to initiate replenishment of fresh dialysis fluid in the second means from the first means along said first flow path, while maintaining dialysis fluid in the peritoneal cavity of the patient, and (iii) blocking said second path while leaving the first and third paths open, whereby fresh dialysis fluid continues to pass along said first path from the first means to the second means, and simultaneously dialysis fluid from the peritoneal cavity of the patient drains along the catheter and said third path into said third means, mode (i) constituting the fill mode for the patient, mode (ii) constituting the dwell mode for the patient, and mode (iii) constituting the drain mode for the patient.
Claim 16
Dependent Claim
33 words
The method claimed in claim 13, in which dialysis fluid in said second means is heated, and in which each of modes (ii) and (iii) is maintained for a preselected period of time.
Claim 17
Dependent Claim
55 words
The apparatus claimed in claim 1, claim 2 or claim 3, in which the said first means comprises a plurality of prepackaged, sterile bags of dialysis fluid, and in which the portion of the second means which receives the dialysis fluid is constituted by a further one of such prepackaged, sterile bags of dialysis fluid.
Claim 18
Dependent Claim
51 words
The method claimed in claim 13 or claim 14, which further includes using, as the said first means, a plurality of prepackaged, sterile bags of dialysis fluid, and using, as the portion of the second means which receives the dialysis fluid, a further one of.such prepackaged, sterile bags of dialysis fluid.
Claim 19
Dependent Claim
199 words
A dialysis apparatus comprising: first means for supplying dialysis fluid, said first means comprising a plurality of prepackaged, sterile bags of dialysis fluid, second means for receiving and heating dialysis fluid, the portion of the second means which receives the dialysis fluid being constituted by a further one of such prepackaged, sterile bags of dialysis fluid, third means for receiving and weighing a quantity of dialysis fluid, a catheter, structure supporting said first means above said second means, said second means above said catheter and said third means below said catheter, a first fluid flow path interconnecting said first and second means, a second fluid flow path interconnecting said second means and said catheter, a third fluid flow path interconnecting said catheter and said third means, characterized in that, said second means is also adapted to weigh dialysis fluid, the apparatus further including valve means for selectively (i) blocking said first and third paths while leaving said second path open, (ii) blocking said second and third paths while leaving the first path open, and (iii) blocking the second path while leaving the first and third paths open, and timer/computer means for cycling modes (i), (ii) and (iii) in sequence.
Claim 20
Dependent Claim
199 words
A dialysis apparatus comprising: first means for supplying dialysis fluid, said first means comprising a plurality of prepackaged, sterile bags of dialysis fluid, second means for receiving and heating dialysis fluid, the portion of the second means which receives the dialysis fluid being constituted by a further one of such prepackaged, sterile bags of dialysis fluid, third means for receiving and weighing a quantity of dialysis fluid, a catheter, structure supporting said first means above said second means, said second means above said catheter and said third means below said catheter, a first fluid flow path interconnecting said first and second means, a second fluid flow path interconnecting said second means and said catheter, a third fluid flow path interconnecting said catheter and said third means, characterized in that, said second means is also adapted to weigh dialysis fluid, the apparatus further including valve means for selectively (i) blocking said first and third paths while leaving said second path open, (ii) blocking said second and third paths while leaving the first path open, and (iii) blocking the second path while leaving the first and third paths open, and timer/computer means for cycling modes (i), (ii) and (iii) in sequence.
Claim 21
Independent Claim
341 words
A method of peritoneal dialysis utilizing a dialysis apparatus comprising first means for supplying dialysis fluid, said first means comprising a pluraltiy of prepackaged, sterile bags of dialysis fluid, second means for receiving and heating dialysis fluid, the portion of said second means which receives the dialysis fluid being a further one of such prepackaged, sterile bags of dialysis fluid, third means for receiving and weighing a quantity of dialysis fluid, a catheter connected to the peritoneal cavity of a patient, structure supporting said first means above said second means, said second means above said catheter and said third means below said catheter, means defining a first fluid flow path interconnecting said first and second means, means defining a second fluid flow path interconnecting said second means and said catheter, and means defining a third fluid flow path interconnecting said catheter and said third means, characterized in that, said second means including means for weighing dialysis fluid in said further one of such prepackaged, sterile bags of dialysis fluid, the method including the following steps in rotational sequence: (i) blocking said first and third paths while leaving the second path open, whereby a quantity of dialysis fluid passes by gravity along said second flow path into the peritoneal cavity of the patient, (ii) blocking said second and third paths while leaving said first path open, whereby to initiate replenishment of fresh dialysis fluid in the second means from the first means along said first flow path, while maintaining dialysis fluid in the peritoneal cavity of the patient, and (iii) blocking said second and fourth paths while leaving the first path open, whereby fresh dialysis fluid continues to pass along said first path from the first means to the second means, and simultaneously dialysis fluid from the peritoneal cavity of the patient drains along the catheter and said third path into said third means, mode (i) constituting the FILL mode for the patient, mode (ii) constituting the DWELL mode for the patient, and mode (iii) constituting the DRAIN mode for the patient.
Claim 22
Independent Claim
341 words
A method of peritoneal dialysis utilizing a dialysis apparatus comprising first means for supplying dialysis fluid, said first means comprising a pluraltiy of prepackaged, sterile bags of dialysis fluid, second means for receiving and heating dialysis fluid, the portion of said second means which receives the dialysis fluid being a further one of such prepackaged, sterile bags of dialysis fluid, third means for receiving and weighing a quantity of dialysis fluid, a catheter connected to the peritoneal cavity of a patient, structure supporting said first means above said second means, said second means above said catheter and said third means below said catheter, means defining a first fluid flow path interconnecting said first and second means, means defining a second fluid flow path interconnecting said second means and said catheter, and means defining a third fluid flow path interconnecting said catheter and said third means, characterized in that, said second means including means for weighing dialysis fluid in said further one of such prepackaged, sterile bags of dialysis fluid, the method including the following steps in rotational sequence: (i) blocking said first and third paths while leaving the second path open, whereby a quantity of dialysis fluid passes by gravity along said second flow path into the peritoneal cavity of the patient, (ii) blocking said second and third paths while leaving said first path open, whereby to initiate replenishment of fresh dialysis fluid in the second means from the first means along said first flow path, while maintaining dialysis fluid in the peritoneal cavity of the patient, and (iii) blocking said second and fourth paths while leaving the first path open, whereby fresh dialysis fluid continues to pass along said first path from the first means to the second means, and simultaneously dialysis fluid from the peritoneal cavity of the patient drains along the catheter and said third path into said third means, mode (i) constituting the FILL mode for the patient, mode (ii) constituting the DWELL mode for the patient, and mode (iii) constituting the DRAIN mode for the patient.
Claim 23
Dependent Claim
31 words
The apparatus claimed in claim 1 or claim 17, in which the weighing portions of said first and second means are mounted within a single housing, for compactness of the apparatus.
References Cited (Backward Citations)
No citation records indexed.
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