System for monitoring and controlling peritoneal dialysis
First Claim
1. A peritoneal dialysis system comprising:
- a cycler including first and second pressure sensors, the cycler being operable with a disposable cassette including first and second sensing locations, the cassette connected to a patient line, which is capable of being placed in fluid communication with a catheter having access to a patient'"'"'s peritoneal cavity, the cycler constructed and arranged to;
convey dialysis fluid to the peritoneal cavity through the patient line and the catheter during a patient fill phase;
allow the dialysis fluid to dwell within the peritoneal cavity during a patient dwell phase;
convey dialysis fluid away from the peritoneal cavity through the patient line and the catheter during a patient drain phase; and
sense, at the first and second sensing locations on the disposable cassette via the first and second pressure sensors contacting the first and second sensing locations, respectively, a pressure through the catheter to optimize an amount of fluid conveyed during the patient fill phase, so that the peritoneal cavity is not overpressurized during the patient dwell phase.
1 Assignment
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Accused Products
Abstract
A peritoneal dialysis system includes a cycler operable with a disposable cassette, the cassette connected to a patient line, the cassette capable of fluid communication with a catheter having access to a patient'"'"'s peritoneal cavity, the cycler configured to: (i) convey dialysis fluid to the peritoneal cavity through the patient line and the catheter during a patient fill phase; (ii) allow the dialysis fluid to dwell within the peritoneal cavity during a patient dwell phase; (iii) convey dialysis fluid away from the peritoneal cavity through the patient line and the catheter during a patient drain phase; and (iv) sense, at first and second sensing locations of the disposable cassette via first and second pressure sensors, an intraperitoneal pressure through the catheter to optimize an amount of fluid conveyed during the patient fill phase, so that the peritoneal cavity is not overpressurized during the patient dwell phase.
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Citations
24 Claims
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1. A peritoneal dialysis system comprising:
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a cycler including first and second pressure sensors, the cycler being operable with a disposable cassette including first and second sensing locations, the cassette connected to a patient line, which is capable of being placed in fluid communication with a catheter having access to a patient'"'"'s peritoneal cavity, the cycler constructed and arranged to; convey dialysis fluid to the peritoneal cavity through the patient line and the catheter during a patient fill phase; allow the dialysis fluid to dwell within the peritoneal cavity during a patient dwell phase; convey dialysis fluid away from the peritoneal cavity through the patient line and the catheter during a patient drain phase; and sense, at the first and second sensing locations on the disposable cassette via the first and second pressure sensors contacting the first and second sensing locations, respectively, a pressure through the catheter to optimize an amount of fluid conveyed during the patient fill phase, so that the peritoneal cavity is not overpressurized during the patient dwell phase. - View Dependent Claims (2, 3, 4, 5)
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6. A peritoneal dialysis system comprising:
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source of dialysis fluid; a disposable cassette including a sensing location; a first flow path from the source of dialysis fluid to the disposable cassette and from the disposable cassette to a patient; a second flow path from the patient to the disposable cassette and from the disposable cassette to a dialysis fluid drain; a cycler including a pressure sensor, the cycler being constructed and arranged to operate with the disposable cassette to; (i) convey dialysis fluid from the source of dialysis fluid through the first flow path to the patient and from the patient through the second flow path to the dialysis fluid drain using a pair of membrane pumps alternating to form an at least substantially continuous flow; and (ii) sense, at the sensing location on the disposable cassette via the pressure sensor contacting the sensing location, a pressure to optimize an amount of fluid flowing through at least one of the first flow path and the second flow path. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A peritoneal dialysis system comprising:
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a disposable cassette including first and second sensing locations; and a cycler including first and second pressure sensors, the cycler being constructed and arranged to; (i) a convey dialysis fluid from a dialysis fluid container through a catheter to a patient; (ii) allow the dialysis fluid to dwell within the patient; (iii) reverse a direction of dialysis fluid flow in the catheter away from the patient; and (iv) sense, at the first and second sensing locations on the disposable cassette using the first and second pressure sensors provided by the cycler and placed in contact with the first and second sensing locations, respectively, the sensing locations in fluid communication with the catheter, a pressure to optimize at least one of an amount of fluid flowing towards or away from the patient, so that the patient is comfortable while the dialysis fluid dwells within the patient. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A peritoneal dialysis system comprising:
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a disposable cassette including a sensing location; and a cycler including a pressure sensor, the cycler being constructed and arranged to; (i) pump substantially continuously using a pair of alternating pumps to convey dialysis fluid to a peritoneal cavity through a catheter during a patient fill phase; (ii) allow the dialysis fluid to dwell within the peritoneal cavity during a patient dwell phase; (iii) pump substantially continuously using the pair of alternating pumps to convey dialysis fluid away from the peritoneal cavity through the catheter during a patient drain phase; and (iv) measure, at the sensing location on the disposable cassette via the pressure sensor contacting the sensing location, a pressure through the catheter to optimize an amount of fluid conveyed during the patient fill phase, so that the peritoneal cavity is not overpressurized during the patient dwell phase. - View Dependent Claims (20)
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21. A peritoneal dialysis system comprising:
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a cycler; a disposable cassette operable with the cycler; a patient line extending from the disposable cassette, the patient line connectable to a catheter having access to a patient'"'"'s peritoneal cavity; first and second pressure sensors provided by the cycler; corresponding first and second sensing locations on the disposable cassette located, in operation, directly adjacent to and contacting the first and second pressure sensors; a patient fill phase performed by the cycler; a patient dwell phase performed by the cycler; a patient drain phase performed by the cycler; and wherein the patient fill phase is controlled by the cycler and at lease one of the pressure sensors, so that the peritoneal cavity is not overpressurized during the dwell phase. - View Dependent Claims (22)
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23. A peritoneal dialysis system comprising:
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a cycler; a disposable cassette operable with the cycler; a patient line extending from the disposable cassette, the patient line connectable to a catheter having access to a patient'"'"'s peritoneal cavity; first and second pressure sensors provided by the cycler; corresponding first and second sensing locations on the disposable cassette that are in contact with first and second pressure sensors of the cycler and are separate from pumping locations and valving locations of the disposable cassette; a patient fill phase performed by the cycler; a patient dwell phase performed by the cycler; a patient drain phase performed by the cycler; and wherein the patient drain phase is controlled by the cycler and one of the pressure sensors so as not to apply too much negative pressure during the patient drain phase. - View Dependent Claims (24)
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Specification