A system and method for balancing flows of renal replacement fluid is disclosed. The method uses pressure controls and pressure sensing devices to more precisely meter and balance the flow of fresh dialysate and spent dialysate. The balancing system may use one or two balancing devices, such as a ba
A system and method for balancing flows of renal replacement fluid is disclosed. The method uses pressure controls and pressure sensing devices to more precisely meter and balance the flow of fresh dialysate and spent dialysate. The balancing system may use one or two balancing devices, such as a balance tube, a tortuous path, or a balance chamber.
대표청구항▼
1. A dialysis system comprising: a renal therapy machine including a controller; anda cassette operable with the machine, the cassette including a housing configured and arranged to be placed in the machine,a flexible membrane attached to the housing, the membrane and housing cooperating with the ma
1. A dialysis system comprising: a renal therapy machine including a controller; anda cassette operable with the machine, the cassette including a housing configured and arranged to be placed in the machine,a flexible membrane attached to the housing, the membrane and housing cooperating with the machine to perform a valving function controlling a flow of a renal failure therapy fluid,fluid pathways within the housing for routing the renal failure therapy fluid, andat least one balancing system and at least four valves operably connected to the at least one balancing system, the at least one balancing system operably connected to the fluid pathways and to pumps for pumping the renal failure therapy fluid, the at least one balancing system configured to equalize the flow of the renal failure therapy fluid to and from a dialyzer or a patient,at least one pressure sensor for (i) sensing a pressure of the renal failure therapy fluid including a fresh pumping cycle pressure and a spent pumping cycle pressure, and (ii) conveying a signal representative of the pressure of the renal failure therapy fluid to the controller of the machine, andwherein the controller is configured to use the signal to control the pumps and the at least four valves for the flow of renal failure therapy fluid to and from the at least one balancing system so that a pressure of fresh renal failure therapy fluid to the at least one balancing system is approximately equal to a pressure of spent renal failure therapy fluid to the at least one balancing system by (i) selecting an operating pressure based on the sensed fresh pumping cycle pressure and the sensed spent pumping cycle pressure from the at least one pressure sensor, and (ii) adjusting one of (a) the fresh renal failure therapy fluid pressure or (b) the spent renal failure therapy fluid pressure to be equal to the selected operating pressure. 2. The dialysis system of claim 1, wherein the cassette is configured for one of hemodialysis and peritoneal dialysis and optionally, at least one temperature sensor within the cassette for sensing a temperature of the renal failure therapy fluid. 3. The dialysis system of claim 1, wherein at least one of the at least four valves is a pressure-regulating valve or further comprising at least one pressure regulator configured for regulating the pressure of fresh or spent renal failure therapy fluid. 4. The dialysis system of claim 1, wherein the selected operating pressure is the higher of the sensed fresh pumping cycle pressure and the sensed spent pumping cycle pressure. 5. The dialysis system of claim 1, further comprising a separator in the at least one balancing system, wherein the separator is selected from the group consisting of a ball, a piston, a balloon, a wiper, and a membrane. 6. The dialysis system of claim 5, wherein the at least one balancing system is configured to prevent the separator from completely blocking flow into or from the at least one balancing system. 7. The dialysis system of claim 1, wherein the at least one pressure sensor comprises two pressure sensors, a first pressure sensor for monitoring and controlling a flow of spent renal failure therapy fluid and a second pressure sensor for monitoring and controlling a flow of fresh renal failure therapy fluid. 8. The dialysis system of claim 1, wherein the at least one balancing system is fabricated separately in at least two pieces and then attached to the housing. 9. The dialysis system of claim 1, wherein the at least one balancing system is at least one balancing tube comprising at least one inlet port and at least one outlet port that each face approximately 90 degrees relative to the at least one balancing tube. 10. The dialysis system of claim 1, wherein the at least one balancing system has a form selected from a group consisting of a right cylinder, an ovate cylinder, a balloon, a bellows, and a half cylinder. 11. A dialysis system comprising: a renal therapy machine including a controller; anda cassette operable with the machine, the cassette including a housing for the cassette configured and arranged to be placed in the machine,a flexible membrane attached to the housing, the membrane and housing cooperating with the controller of the machine to operate at least four valves controlling a flow of a renal failure therapy fluid,fluid pathways within the housing for routing the renal failure therapy fluid, andat least one balancing apparatus operably connected to the fluid pathways, and the at least four valves, at least one inlet port and at least one outlet port operably connected to the at least one balancing apparatus, wherein the at least one inlet port and at least one outlet port are configured to allow the removal of air from each port, and wherein the at least one balancing apparatus is configured to equalize the flow of the renal failure therapy fluid to and from a dialyzer or a patient, anda separator in the at least one balancing apparatus, the separator configured to move freely within the at least one balancing apparatus, wherein the balancing apparatus includes obstructers configured to prevent the separator from moving to opposing ends of the at least one balancing apparatus,at least one pressure sensor for (i) sensing a pressure of the renal failure therapy fluid including a fresh pumping cycle pressure and a spent pumping cycle pressure, and (ii) conveying a signal representative of the pressure of the renal failure therapy fluid to the controller of the machine, andwherein the controller is configured to control the at least four valves for the flow of the renal failure therapy fluid to and from the at least one balancing apparatus so that a pressure of the fresh renal failure therapy fluid to the at least one balancing apparatus is approximately equal to a pressure of the spent renal failure therapy fluid to the at least one balancing apparatus by (i) selecting an operating pressure based on the sensed fresh pumping cycle pressure and the sensed spent pumping cycle pressure from the at least one pressure sensor, and (ii) adjusting one of (a) the fresh renal failure therapy fluid pressure, or (b) the spent renal failure therapy fluid pressure, to be equal to the selected operating pressure. 12. The dialysis cassette of claim 11, wherein the separator is joined to a moving cylinder or piston, and the cassette is configured so that movement of the cylinder or piston is controlled by a motor or a shaft from the renal therapy machine. 13. The dialysis system of claim 11, wherein the cassette further comprises at least one pressure regulating valve or pressure regulator in fluid communication with the at least one balancing system. 14. The dialysis cassette of claim 11, wherein the at least one balancing system comprises two balancing systems.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (92)
Lipps Bennie J. (Walnut Creek CA) Landau Julian I. (Concord CA), Apparatus and method for automatically controlling hemodialysis at a pre-selected ultrafiltration rate.
Allan Jonathan M. (Portland OR) Burton Richard J. (Tigard OR) Jurock Volker (Rodgau DEX), Apparatus and method for controlling ultrafiltration during hemodialysis.
Allan Jonathan M. (Portland OR) Burton Richard J. (Tigard OR) Jurock Volker (Rodgau DEX), Apparatus and method for controlling ultrafiltration during hemodialysis.
Peterson Bruce A. (Milwaukie OR) Connell Mark E. (Sandy OR) Bedient Robert A. (Portland OR) Elsen Raymond (Antwerp OR BEX) Hogard Michael E. (Oregon City OR) Johnson Harley D. (Portland OR) Kelly Tho, Apparatus for performing a self-test of kidney dialysis membrane.
Dahlberg Bengt A. G. (Veberd SEX) Jeppsson Jan-Bertil (Lomma SEX) Ohlsson Lars I. (Asarum SEX) Simonsson Tord B. (Landskrona SEX), Apparatus for the measurement of fluid flow.
Bene Bernard (Irigny FRX) Chevallet Jacques (Serezin du Rhone FRX), Artificial kidney and method for adjusting a concentration of substance in blood using thereof.
Papanek Thomas H. (Oakland CA) Egler Mark S. (Boston MA) Landau Julian I. (Concord CA), Automated diaphragm apparatus and method for controlling negative pressure hemodialysis treatment.
Burbank, Jeffrey H.; Brugger, James M.; Treu, Dennis M.; Finch, Jr., C. David, Blood treatment systems and methods that maintain sterile extracorporeal processing conditions.
Kerns Ralph M. (Laguna Hills CA) Rubalcaba ; Jr. Bernardino (Laguna Beach CA) Bobo Donald E. (Fountain Valley CA) Rake Kenneth W. (Laguna Niguel CA) Weyant Robert R. (Claremont CA), Centrally managed modular infusion pump system.
Wamsiedler Ralf (Oberursel DEX) Wojke Ralf (Frankfurt DEX) Pieper Walter (Florstadt DEX) Christmann-Braun Horst (Kelkheim DEX), Diaphragm gage for measuring the pressure of a fluid.
Burbank, Jeffrey H.; Brugger, James M; Treu, Dennis M., Extracorporeal circuits for performing hemofiltration employing pressure sensing without an air interface.
Treu Dennis M. ; Burbank Jeffrey H. ; Brugger James M., Flow-through peritoneal dialysis systems and methods with on-line dialysis solution regeneration.
Burbank, Jeffrey H.; Brugger, James M.; Treu, Dennis M., Fluid processing systems and methods using extracorporeal fluid flow panels oriented within a cartridge.
Kitaevich Yuli (Milford OH) Hemasilpin Nat (Fairfield OH) Marchevsky J. Gabriel (Cincinnati OH) Bissler John J. (Cincinnati OH) Benzing ; III George (Cincinnati OH) McEnery Paul T. (Cincinnati OH), Hemofiltration system and method.
Shaldon Stanley (Montpellier CA FRX) Gullberg Claes-Ake (Covina CA) Larsson Lars-Ake (Lddekpinge SEX), Hemofiltration system and safety system therefor.
Vogler Tina C. (South Orange NJ) Asher William J. (Fanwood NJ), Liquid membrane capsule systems resistant to coalescence by means of an irreversible coating.
Brugger, James M.; Burbank, Jeffrey H.; Treu, Dennis M., Method for performing renal replacement therapy including producing sterile replacement fluid in a renal replacement therapy unit.
Pedrini, Luciano; Wiesen, Gerhard, Method for the purification of blood by means of hemodialysis and/or hemofiltration and apparatus for performing said method.
Tsuji Tsuyoshi (Saitama JPX) Satoh Masaaki (Tokyo JPX) Yunoki Masayuki (Saitama JPX), Method of controlling amount of removed water by ultrafiltration and control device for controlling amount of removed wa.
Lane Leslie A. (Santa Clara CA) Lybeck Lynn V. (Moss Beach CA) Perloff David S. (Sunnyvale CA) Kumagi Shoji (Santa Clara CA), Process control interface with simultaneously displayed three level dynamic menu.
Faict Dirk,BEX ; Chen Chi J. ; Peluso Francesco,BEX ; Childers Robert Warren ; Balteau Patrick,BEX ; Eerlingen Vital,BEX ; Emerson Paul Frederick ; Colleran Lisa, System and method for providing sterile fluids for admixed solutions in automated peritoneal dialysis.
Burbank, Jeffrey H.; Brugger, James M.; Treu, Dennis M.; Finch, Jr., C. David; Fulkerson, Barry N.; White, Steven A., Systems and methods for performing blood processing and/or fluid exchange procedures.
Truitt Lori A. ; Corbin ; III Frank ; Lobdell Donn D. ; Miller Douglas P. ; Manica Keith ; Eilers George J. ; Johnson Steven H. ; Leppert Lawrence L., Technique for extracorporeal treatment of blood.
Guerro Gerald J. (Trumbull CT) Henderson ; Jr. William A. (Stamford CT) Singh Balwant (Stamford CT), Water soluble binder compositions containing beta-hydroxy urethanes and polyfunctional carboxylic acids.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.