Method and apparatus for continuous peritoneal cascade dialysis and hemofiltration (CPCD/H)
First Claim
1. A system for continuous intraperitoneal dialysis comprising:
- a dialyzer element for being implanted within the peritoneal cavity of a patient and comprising a filter membrane comprising a plurality of elongated hollow microporous fibers having an exterior membrane surface for being exposed to fluid within said peritoneal cavity and an interior membrane surface forming an interior dialysate passageway, said filter membrane having pores sufficient to allow diffusion of blood toxins therethrough;
an inlet for directing dialysate fluid into said dialyzer element and an outlet for directing dialysate fluid from said dialyzer element;
a tube having a first conduit connected to said inlet and a second conduit connected to said outlet; and
one or more pumps cooperating with said tube for pumping dialysate fluid in and/or out of said dialyzer element.
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Abstract
A continuous peritoneal dialysis is carried out by providing a dialyzer element having a filter membrane for being exposed within the peritoneal cavity and an interior dialysate passageway, the membrane having pores sufficient to allow diffusion of blood toxins, implanting the dialyzer element in the peritoneal cavity of a patient, infusing a transfer fluid into the patient'"'"'s peritoneal cavity and continuously supplying substantially fresh dialysate fluid into interior dialysate passageway of the dialyzer element, directing the fluid along the passageway whereby it is exposed to the transfer fluid by diffusion through the membrane and whereby toxins from said transfer fluid are diffused into the dialysate in the dialyzer element to form toxic dialysate fluid, and continuously removing the toxic dialysate from said dialyzer element.
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Citations
38 Claims
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1. A system for continuous intraperitoneal dialysis comprising:
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a dialyzer element for being implanted within the peritoneal cavity of a patient and comprising a filter membrane comprising a plurality of elongated hollow microporous fibers having an exterior membrane surface for being exposed to fluid within said peritoneal cavity and an interior membrane surface forming an interior dialysate passageway, said filter membrane having pores sufficient to allow diffusion of blood toxins therethrough;
an inlet for directing dialysate fluid into said dialyzer element and an outlet for directing dialysate fluid from said dialyzer element;
a tube having a first conduit connected to said inlet and a second conduit connected to said outlet; and
one or more pumps cooperating with said tube for pumping dialysate fluid in and/or out of said dialyzer element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for continuous intraperitoneal dialysis comprising:
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a dialyzer element for being implanted within the peritoneal cavity of a patient, and capable of filtering blood and plasma toxins exclusively by direct diffusive contact with peritoneal fluid present in the peritoneal cavity, said dialyzer element comprising;
(i) a filter membrane consisting of a plurality of elongated hollow microporous fibers or one or more microporous membrane sheets, said filter membrane having pores of a size for selective removal or retention of toxins and components of between 103 and 105 daltons molecular weight, said filter membrane having an exterior membrane surface for being a direct diffusive contact with peritoneal fluid present in the peritoneal cavity, and an interior dialysate passageway for receiving dialysate fluid, (ii) an inlet for directing dialysate fluid to the interior dialysate passageway and an outlet for directing dialysate fluid from the dialyzer element, and (iii) a tube assembly comprising a first conduit connected to said inlet and a second conduit to said outlet. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
one or more pumps cooperating with said tube assembly for pumping dialysate fluid in and/or out of said dialyzer element.
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34. A system of claim 10 including a dialysate fluid supply cooperating with said first conduit for supplying fresh dialysate fluid thereto.
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35. A system of claim 10 including a receptacle cooperating with said second conduit for receiving toxic dialysate fluid from said dialyzer element.
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36. A system of claim 10 wherein said dialyzer element comprises a filter membrane having a pore size allowing passage only of materials having a molecular weight of less than 103 daltons.
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37. A system of claim 10 wherein said tube includes a third conduit for supplying transfer fluid to a patient'"'"'s peritoneal cavity exteriorly of said interior dialysate passageway.
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38. A system of claim 10 wherein said tube comprises a triple lumen catheter having a third conduit therein terminating exteriorly from said interior dialysate passageway.
Specification