Continuous cyclic peritoneal dialysis system and method
First Claim
1. A continuous cycle peritoneal dialysis process comprising:
- providing a source of a generally continuous and unlimited supply 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;
using pump means for pumping sterilized dialysis fluid from said source to said catheter through said inflow line during a fill cycle and for pumping said fluid from said catheter to a drain through said outflow line during a drain cycle;
monitoring a function of a volume of said sterile dialysis fluid in said peritoneal cavity by determining a high level signal for said dialysis fluid inflow corresponding to a comfortable and efficient cavity distension level of said patient, and setting a low level signal for said dialysis fluid outflow corresponding to a low volume level for dialysis; and
controlling said pump means in response to said high level signal to pump a calibrated fill volume of fluid into said cavity and in response to said low level signal to pump a calibrated drain volume of fluid from said cavity continuously in alternating fill and drain cycles;
delivering said drain volume of fluid pumped out of said cavity to a disposal means so that a single pass of said dialysis fluid occurs through said peritoneal cavity of said patient during said fill and drain cycles;
calibrating said fill volume and drain volume so that a prescribed amount of dialysis fluid is left in said abdominal cavity between said fill and drain cycles;
mixing glucose with said dialysis fluid prior to pumping said fluid into said cavity;
determining the amount of fluid removed from said peritoneal cavity of said patient; and
adjusting the amount of glucose mixed to vary the glucose concentrate of said fill volume fluid in response to amount of fluid removed from said patient.
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Accused Products
Abstract
A continuous cycle peritoneal dialysis system which includes a source (14) of dialysis fluid, and an inflow line (34) and outflow line (35) connected to a catheter (26) implanted in the peritoneal cavity (28). A fill pump (B) pumps dialysis fluid from the source to the catheter during a fill cycle. A drain pump C pumps fluid from the catheter to a drain during a drain cycle. A function of a volume of the dialysis fluid in the peritoneal cavity is detected by a manometer (D). A process controller (A) controls the fill and drain pumps in response to signals from a high fluid level detector (50) and a low fluid level detector (52) on a fluid column tube (48) to pump a calibrated fill volume of fluid into the cavity and a calibrated drain volume of fluid out of the cavity continuously in alternating fill and drain cycles in a manner that the fluid flows through the cavity generally with zero dwell time. In the process, an inflow volume of dialysis fluid pumped into the cavity is metered (36b) and an outflow volume of fluid pumped out of the cavity is metered (44b) to determine the amount of fluid removed from the patient by comparing the inflow and outflow volumes.
215 Citations
19 Claims
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1. A continuous cycle peritoneal dialysis process comprising:
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providing a source of a generally continuous and unlimited supply 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; using pump means for pumping sterilized dialysis fluid from said source to said catheter through said inflow line during a fill cycle and for pumping said fluid from said catheter to a drain through said outflow line during a drain cycle; monitoring a function of a volume of said sterile dialysis fluid in said peritoneal cavity by determining a high level signal for said dialysis fluid inflow corresponding to a comfortable and efficient cavity distension level of said patient, and setting a low level signal for said dialysis fluid outflow corresponding to a low volume level for dialysis; and
controlling said pump means in response to said high level signal to pump a calibrated fill volume of fluid into said cavity and in response to said low level signal to pump a calibrated drain volume of fluid from said cavity continuously in alternating fill and drain cycles;delivering said drain volume of fluid pumped out of said cavity to a disposal means so that a single pass of said dialysis fluid occurs through said peritoneal cavity of said patient during said fill and drain cycles; calibrating said fill volume and drain volume so that a prescribed amount of dialysis fluid is left in said abdominal cavity between said fill and drain cycles; mixing glucose with said dialysis fluid prior to pumping said fluid into said cavity; determining the amount of fluid removed from said peritoneal cavity of said patient; and adjusting the amount of glucose mixed to vary the glucose concentrate of said fill volume fluid in response to amount of fluid removed from said patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A continuous cyclic peritoneal dialysis system comprising:
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a source of a generally continuous supply 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; pump means for controlling the flow of dialysis fluid in said inflow and outflow lines to thereby control a fill volume of dialysis fluid pumped into said peritoneal cavity during a fill cycle and a drain volume pumped out of said cavity during a drain cycle so that a prescribed amount of dialysis fluid is left in said abdominal cavity between said fill and drain cycles; detector means for sensing a function of a volume of dialysis fluid in said peritoneal cavity; control means controlling said pump means in response to said detector means for starting and stopping said respective fill and drain cycles; disposal means connected to said outflow line for discharging said drain volume of dialysis fluid and establishing a single-pass open circuit through said peritoneal cavity for dialysis; and regulating means for adjusting the glucose content of said dialysis to vary the osmolality of said dialysis fluid in response to the amount of fluid removed from said patient during the dialysis process. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A continuous cyclic peritoneal dialysis process comprising:
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providing a dialysis fluid; commencing a fill cycle by delivering an inflow of said fluid into a peritoneal cavity of said patient; sensing a function of a peritoneal volume of said fluid in said cavity; terminating said fill cycle in response to sensing a fill volume; commencing a drain cycle in response to said fill volume by delivering an outflow of said fluid from said cavity; terminating said drain cycle in response to sensing a drain volume; repeating said fill and drain cycles until said process is completed; and regulating the amount of glucose mixed with said fill volume of dialysis fluid in response to a comparison of said volumes of inflow and outflow fluid. - View Dependent Claims (19)
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Specification