Patents Assigned to Fresenius Medical Care North America
-
Patent number: 8038886Abstract: A container for use with a hemodialysis apparatus having a vent structure is described. The vent structure is porous, and allows air in the container to vent when the container is being filled with fluid, but expands when the vent structure becomes wet, when filling is complete, thereby closing off the pores and inhibiting (e.g., preventing) fluid from flowing through the vent structure, and reentry of air into the container. The vent structure can also include a micro-porous membrane.Type: GrantFiled: June 26, 2009Date of Patent: October 18, 2011Assignee: Fresenius Medical Care North AmericaInventors: Thomas Irvin Folden, Martin Joseph Crnkovich, Colin Weaver
-
Patent number: 7935070Abstract: The invention provides container systems, kits and methods for peritoneal dialysis (PD) solutions. Such a system, for example, includes a first compartment that contains a PD osmotic agent and a second compartment that contains a PD buffer agent. The compartments maintain their respective contents separately from one another for purposes of transport, storage and/or sterilization. However, the compartments are fluidly couplable, so that their respective contents can be combined with one another, e.g., following sterilization of the agents and prior to their introduction into the patient's abdomen.Type: GrantFiled: January 28, 2005Date of Patent: May 3, 2011Assignee: Fresenius Medical Care North AmericaInventors: Lynn E. Jensen, Olli Tuominen, Jay M. Lan
-
Patent number: 7837666Abstract: The invention provides container systems, kits and methods for peritoneal dialysis (PD) solutions. Such a system, for example, includes a first compartment that contains a PD osmotic agent and a second compartment that contains a PD buffer agent. The compartments maintain their respective contents separately from one another for purposes of transport, storage and/or sterilization. However, the compartments are fluidly couplable, so that their respective contents can be combined with one another, e.g., following sterilization of the agents and prior to their introduction into the patient's abdomen. The invention provides, in other aspects, such systems, kits and methods that provide protective structure which inhibits breaking of a seal prior between the second compartment and an outlet of the system, prior to breaking of a seal between the first and second compartments.Type: GrantFiled: January 26, 2006Date of Patent: November 23, 2010Assignee: Fresenius Medical Care North AmericaInventors: Lynn E. Jensen, Olli Tuominen, Jay M. Lan
-
Publication number: 20090320684Abstract: A container for use with a hemodialysis apparatus having a vent structure is described. The vent structure is porous, and allows air in the container to vent when the container is being filled with fluid, but expands when the vent structure becomes wet, when filling is complete, thereby closing off the pores and inhibiting (e.g., preventing) fluid from flowing through the vent structure, and reentry of air into the container. The vent structure can also include a micro-porous membrane.Type: ApplicationFiled: June 26, 2009Publication date: December 31, 2009Applicant: FRESENIUS MEDICAL CARE NORTH AMERICAInventors: Colin Weaver, Martin Joseph Crnkovich, Thomas Irvin Folden
-
Publication number: 20090078592Abstract: The invention provides container systems, kits and methods for peritoneal dialysis (PD) solutions. Such a system, for example, includes a first compartment that contains a PD osmotic agent and a second compartment that contains a PD buffer agent. The compartments maintain their respective contents separately from one another for purposes of transport, storage and/or sterilization. However, the compartments are fluidly couplable, so that their respective contents can be combined with one another, e.g., following sterilization of the agents and prior to their introduction into the patient's abdomen. The invention provides, in other aspects, such systems, kits and methods that provide protective structure which inhibits breaking of a seal prior between the second compartment and an outlet of the system, prior to breaking of a seal between the first and second compartments.Type: ApplicationFiled: December 2, 2008Publication date: March 26, 2009Applicant: FRESENIUS MEDICAL CARE NORTH AMERICAInventors: Lynn E. Jensen, Olli Tuominen, Jay M. Lan
-
Publication number: 20080000835Abstract: Various methods and apparatus are provided for the administration, control, and display of dialysate constituents, particularly, for example, the acid and bicarbonate constituents, in order to achieve more physiologically desirable proportions of sodium and total base buffer and, more generally, more physiologically desirable dialysate.Type: ApplicationFiled: May 17, 2006Publication date: January 3, 2008Applicant: FRESENIUS MEDICAL CARE NORTH AMERICAInventor: Brooks Rogers
-
Patent number: 7097630Abstract: This invention provides a method and apparatus for calculating a hemodialysis parameter, especially blood access flow rate, using multiple dialysance values. The dialysance values may be calculated based upon either sodium or urea concentrations. One dialysance value can be determined for conditions in which a patient's arterial line withdraws blood from an upstream location in a patient's fistula and treated blood is returned by a venous line to a downstream location in a patient's fistula. The second dialysance value can be determined when the lines have been reconfigured so that the arterial line withdraws blood from a downstream portion of a patient's fistula and the venous line returns treated blood to an upstream portion of a patient's fistula.Type: GrantFiled: February 27, 2003Date of Patent: August 29, 2006Assignee: Fresenius Medical Care North AmericaInventors: Frank A. Gotch, Thomas I. Folden
-
Publication number: 20060186045Abstract: The invention provides container systems, kits and methods for peritoneal dialysis (PD) solutions. Such a system, for example, includes a first compartment that contains a PD osmotic agent and a second compartment that contains a PD buffer agent. The compartments maintain their respective contents separately from one another for purposes of transport, storage and/or sterilization. However, the compartments are fluidly couplable, so that their respective contents can be combined with one another, e.g., following sterilization of the agents and prior to their introduction into the patient's abdomen. The invention provides, in other aspects, such systems, kits and methods that provide protective structure which inhibits breaking of a seal prior between the second compartment and an outlet of the system, prior to breaking of a seal between the first and second compartments.Type: ApplicationFiled: January 26, 2006Publication date: August 24, 2006Applicant: FRESENIUS MEDICAL CARE NORTH AMERICAInventors: Lynn Jensen, Olli Tuominen, Jay Lan
-
Patent number: 6648845Abstract: This invention provides a method and apparatus for calculating a hemodialysis parameter, especially blood access flow rate, using multiple dialysance values. The dialysance values may be calculated based upon either sodium or urea concentrations. One dialysance value can be determined for conditions in which a patient's arterial line withdraws blood from an upstream location in a patient's fistula and treated blood is returned by a venous line to a downstream location in a patient's fistula. The second dialysance value can be determined when the lines have been reconfigured so that the arterial line withdraws blood from a downstream portion of a patient's fistula and the venous line returns treated blood to an upstream portion of a patient's fistula.Type: GrantFiled: January 7, 1998Date of Patent: November 18, 2003Assignee: Fresenius Medical Care North AmericaInventors: Frank A. Gotch, Thomas I. Folden