Patents by Inventor Dennis Treu

Dennis Treu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20090012442
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: March 8, 2004
    Publication date: January 8, 2009
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Patent number: 7473238
    Abstract: A disposable fluid circuit kit for extracorporeal blood treatment systems that supply replacement fluid to a patient is described. The circuit has a blood portion that carries blood and subjects it to some treatment, such as dialysis or hemofiltration. A portion carries filtrate or dialysate. A replacement fluid portion that carries fluid used to compensate for fluid loss is connectable to a supply of replacement fluid. a sterilizing filter in the replacement fluid portion sterilizes the replacement fluid before introduction into the patient acting as a guard against touch contamination of the connected replacement fluid container. Preferably, the filter has a pore size effective to eliminate pyrogens.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: January 6, 2009
    Assignee: NxStage Medical, Inc.
    Inventors: James Brugger, Jeffrey H. Burbank, Dennis Treu
  • Publication number: 20080306426
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: March 8, 2004
    Publication date: December 11, 2008
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Publication number: 20070260168
    Abstract: Systems and methods handle air and rinsing fluid during fluid processing. The systems and methods eliminate air from a fluid processing system prior to, during, and after use. The systems and methods provide a connector assembly for establishing fluid flow from a fluid source. The connector assembly has discrete first and second passages that prevent communication between the fluid in first passage and the fluid in the second passage. Prior to system use, the connector assembly may be utilized in a priming function to remove residual air from a fluid circuit prior to use. The connector assembly may also be utilized after use to perform a rinse-back function.
    Type: Application
    Filed: May 1, 2007
    Publication date: November 8, 2007
    Applicant: NXSTAGE MEDICAL, INC.
    Inventors: James Brugger, Dennis Treu
  • Publication number: 20070185430
    Abstract: A sterilized fluid management kit for use in renal replacement therapy isolates a replacement fluid container from touch contamination and provides for sterilization of replacement fluid by filtering using an installed filter that is hermetically connected to the replacement fluid container. A method is described where replacement fluid is automatically generated before treatment.
    Type: Application
    Filed: April 3, 2007
    Publication date: August 9, 2007
    Applicant: NXSTAGE MEDICAL, INC.
    Inventors: JAMES BRUGGER, Jeffrey Burbank, Dennis Treu
  • Publication number: 20070000333
    Abstract: A pressure measurement device usable for monitoring pressure of fluids such as blood, waste, and replacement fluid in a blood treatment system provides a reliable signal and other benefits by virtue of a number of features of the various embodiments disclosed. The pressure of fluid carried by a vessel or tube is measured by measuring a change in shape of the vessel or tube via a sensor element contacting it. Materials, shape, and mechanical support cooperatively ensure that the little inelastic strain occurs and pressure measurements are repeatable. The embodiments are compatible with the use of disposable vessels and tubes.
    Type: Application
    Filed: June 29, 2005
    Publication date: January 4, 2007
    Applicant: NXSTAGE MEDICAL, INC.
    Inventors: James BRUGGER, Christopher MCDOWELL, Jefrey BURBANK, Dennis TREU
  • Patent number: 7112273
    Abstract: A method and device for adjusting a volumetric flow balancing system for an extracorporeal blood treatment system receives a pressure signal and calculates a compensation factor that is used to adjust the relative flow rates of the volumetrically balanced fluids. For example, in a hemofiltration system, the flow of waste and and replacement fluid may be balanced volumetrically. Ultrafiltrate may be pumped in a bypass circuit in such a system. The rate of ultrafiltrate flow may be adjusted by the compensation signal. The compensation signal may be empirically derived.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: September 26, 2006
    Assignee: Nxstage Medical, Inc.
    Inventors: William Weigel, Daniel Call, Dennis Treu
  • Publication number: 20060084906
    Abstract: A flow management system comprising a first panel having a fluid pathway and a second panel having a fluid pathway for passing a second fluid. The fluid pathway of the first panel passes a first fluid. The first panel includes a first compartment to receive a volume of the first fluid. The second panel includes a second compartment to receive a volume of the second fluid. The first and second panels are aligned so that the first compartment overlays the second compartment. The flow management system may be placed within a gap defined by a first surface and a second surface. The first and second compartments are disposed within the gap so that the second compartment bears against the second surface as the second fluid fills the second compartment and forces the first fluid out from the first compartment as the first compartment bears against the first surface.
    Type: Application
    Filed: October 31, 2005
    Publication date: April 20, 2006
    Applicant: NXSTAGE MEDICAL, INC.
    Inventors: Jeffrey BURBANK, James BRUGGER, Dennis TREU, C. FINCH, Barry FULKERSON, Steven WHITE
  • Publication number: 20050113735
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: March 8, 2004
    Publication date: May 26, 2005
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Publication number: 20050113734
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: March 8, 2004
    Publication date: May 26, 2005
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Publication number: 20050045548
    Abstract: A disposable fluid circuit kit for extracorporeal blood treatment systems that supply replacement fluid to a patient is described. The circuit has a blood portion that carries blood and subjects it to some treatment, such as dialysis or hemofiltration. A portion carries filtrate or dialysate. A replacement fluid portion that carries fluid used to compensate for fluid loss is connectable to a supply of replacement fluid. a sterilizing filter in the replacement fluid portion sterilizes the replacement fluid before introduction into the patient acting as a guard against touch contamination of the connected replacement fluid container. Preferably, the filter has a pore size effective to eliminate pyrogens.
    Type: Application
    Filed: August 27, 2003
    Publication date: March 3, 2005
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Publication number: 20050020961
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: August 20, 2004
    Publication date: January 27, 2005
    Inventors: Jeffrey Burbank, Dennis Treu, James Brugger
  • Publication number: 20050020960
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: August 6, 2004
    Publication date: January 27, 2005
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Publication number: 20050020959
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: August 6, 2004
    Publication date: January 27, 2005
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Publication number: 20050010158
    Abstract: A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
    Type: Application
    Filed: August 6, 2004
    Publication date: January 13, 2005
    Inventors: James Brugger, Jeffrey Burbank, Dennis Treu
  • Publication number: 20050000868
    Abstract: A method and device for adjusting a volumetric flow balancing system for an extracorporeal blood treatment system receives a pressure signal and calculates a compensation factor that is used to adjust the relative flow rates of the volumetrically balanced fluids. For example, in a hemofiltration system, the flow of waste and and replacement fluid may be balanced volumetrically. Ultrafiltrate may be pumped in a bypass circuit in such a system. The rate of ultrafiltrate flow may be adjusted by the compensation signal. The compensation signal may be empirically derived.
    Type: Application
    Filed: September 26, 2003
    Publication date: January 6, 2005
    Inventors: William Weigel, Daniel Call, Dennis Treu