Patents by Inventor Virote Indravudh

Virote Indravudh 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: 20100331940
    Abstract: An implantable medical lead configured for improved MRI safety and heating reduction performance is disclosed herein. In one embodiment, the lead includes a tubular body having a proximal end and a distal end with a lead connector near the proximal end. In this embodiment the lead further includes a conductor extending longitudinally within the tubular body and having a proximal end that is electrically coupled to the connector and a distal end electrically coupled to a contact pin. The lead in this embodiment further includes a filter element electrically coupled to a distal end of the contact pin and a flange electrically coupled between a proximal end of the filter element and a proximal portion of an electrode. In this embodiment the flange and the proximal portion of the electrode form at least a first part of a hermetic chamber enclosing the filter element.
    Type: Application
    Filed: June 30, 2009
    Publication date: December 30, 2010
    Applicant: PACESETTER, INC.
    Inventors: Virote Indravudh, Yong D. Zhao, Kevin L. Morgan, Dion F. Davis, Grace Jang
  • Patent number: 7822484
    Abstract: An implantable lead includes a lead body, having a distal end and a proximal end, configured to be implanted in a patient. An electrode assembly is provided at the distal end of the lead body, wherein the electrode assembly includes an electrode that is configured to deliver stimulating pulses. The electrode extends between a base and a tip at a distal end of the electrode. A shielding member is provided on the electrode assembly and is positioned to cover at least a portion of the electrode to electrically shield the electrode from RF fields. Optionally, the shielding member may include a shielding conductor that wraps about and extends longitudinally along a length of the electrode from the base to the tip. The shielding conductor may extend from the proximal end of the lead body at least to the distal end of the lead body.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: October 26, 2010
    Assignee: Pacesetter, Inc.
    Inventors: Yong D. Zhao, Virote Indravudh, Xiaoyi Min, Geoff Daush
  • Patent number: 7801624
    Abstract: An implantable cardiac electrotherapy lead is disclosed herein. In one embodiment, the lead includes a tubular body having a distal end with a first soft resilient member. The member extends or is extendable from the distal end radially outward relative to a longitudinal axis of the tubular body.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: September 21, 2010
    Assignee: Pacesetter, Inc.
    Inventors: Conor Flannery, Virote Indravudh, Phong D. Doan, Diane Muff
  • Publication number: 20100137878
    Abstract: An implant tool for use with an endocardial or other implantable lead having an extendable/retractable active fixation tip includes a housing, a shaft rotatably supported by the housing, and a shaft rotation mechanism for rotating the shaft through a predetermined angular travel. The shaft includes a lead attachment portion for selectively coupling a lead to the shaft such that the lead is rotatable with the shaft. The implant tool may include a control tab slidably supported by the housing, wherein longitudinal movement of the control tab actuates the shaft rotation mechanism. The shaft rotation mechanism may include a gear train, an electric motor, a double acting spring mechanism, or a retractable tape wound around the shaft. The gear train includes an input member coupled to the control tab and an output gear coupled to the shaft. The input member meshes with an input gear supported by the housing.
    Type: Application
    Filed: January 29, 2010
    Publication date: June 3, 2010
    Applicant: PACESETTER, INC.
    Inventors: Frank Truong, Virote Indravudh, Shimul Sengupta, Jayaram Sundararajan, Elizabeth Nee, Ryan Buesseler
  • Publication number: 20100114276
    Abstract: An implantable medical lead is disclosed herein. In one embodiment, the lead includes a body and an electrical pathway. The body may include a distal portion with an electrode and a proximal portion with a lead connector end. The electrical pathway may extend between the electrode and lead connector end and include a coiled inductor including a first portion and a second portion at least partially magnetically decoupled from the first portion. The first portion may include a first configuration having a first SRF. The second portion may include a second configuration different from the first configuration. The second configuration may have a second SRF different from the first SRF. For example, the first SRF may be near 64 MHz and the second SRF may be near 128 MHz.
    Type: Application
    Filed: October 30, 2008
    Publication date: May 6, 2010
    Applicant: PACESETTER, INC.
    Inventors: Xiaoyi Min, J. Christopher Moulder, Yong D. Zhao, Virote Indravudh, Ingmar Viohl
  • Publication number: 20100114277
    Abstract: An implantable medical lead is disclosed herein. The lead may include a body and an electrical pathway. The body may include a distal portion with an electrode and a proximal portion with a lead connector end. The electrical pathway may extend between the electrode and lead connector end and may include a coiled inductor including first and second electrically conductive filar cores. The first and second filar cores may be physically joined into a unified single piece proximal terminal on a proximal end of the coiled inductor. The first and second cores may be physically joined into a unified single piece distal terminal on a distal end of the coiled inductor. The first and second filar cores may be helically wound into a coiled portion between the proximal and distal terminals, the filar cores being electrically isolated from each other in the coiled portion.
    Type: Application
    Filed: October 30, 2008
    Publication date: May 6, 2010
    Applicant: PACESETTER, INC.
    Inventors: Yong D. Zhao, Xiaoyi Min, Virote Indravudh
  • Patent number: 5785681
    Abstract: A flow rate controller is provided for regulating the flow rate of medication delivered to a patient by an implantable medication infusion pump of the constant flow type, to minimize or prevent flow rate increases attributable to fluctuations in ambient pressure. The infusion pump comprises an implantable pump housing with a pressurized medication reservoir therein for continuous flow delivery to the patient through a baseline flow path including a restrictor such as a capillary tube. The controller comprises a pressure responsive control valve for connecting a secondary restrictor such as an additional capillary tube in series with the baseline flow path, to prevent undesired increase in the medication flow rate in the event that the patient temporarily encounters a high altitude ambient pressure.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: July 28, 1998
    Assignee: MiniMed Inc.
    Inventor: Virote Indravudh
  • Patent number: 5527307
    Abstract: A medication infusion pump is provided of the type adapted for implantation into the body of a patient, and for programmable delivery of a selected medication through a catheter to the patient over an extended period of time. A side port assembly is mounted quickly and easily onto the pump and defines a flow path through which the medication is discharged to the catheter. The side port assembly includes an access port to permit transcutaneous needle access to the discharge flow path, in combination with a check valve to prevent backflow within the discharge flow path. The discharge side access port can be used to flush residue from the catheter, or in combination with a primary refill port on the pump to flush the pump and/or to determine actual pump stroke volume.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: June 18, 1996
    Assignee: Minimed Inc.
    Inventors: Chad Srisathapat, Virote Indravudh
  • Patent number: 5514103
    Abstract: An implantable medication infusion pump is provided of the type having a pressure reservoir with a selected pressure fluid therein for maintaining liquid medication in an adjacent medication chamber under a substantially constant pressure. The reservoir comprises a hollow structural enclosure defined by at least one movable wall and adapted to be filled with a selected quantity of the pressure fluid, particularly such as a selected fluorocarbon in a liquid-vapor state. The movable wall of the pressure reservoir is shared with and defines one side of the medication chamber, with the pressure fluid undergoing appropriate change of state to expand or contract the pressure reservoir in a manner maintaining the medication under substantially constant pressure. The improved pressure reservoir includes an internal spacer element to prevent contraction of the pressure reservoir beyond a minimum volume at least slightly greater than the liquid state volume of the pressure fluid therein.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: May 7, 1996
    Assignee: Minimed Inc.
    Inventors: Chad Srisathapat, Virote Indravudh
  • Patent number: 5466218
    Abstract: A medication infusion pump is provided of the type adapted for implantation into the body of a patient, and for programmable delivery of a selected medication through a catheter to the patient over an extended period of time. A side port assembly is mounted quickly and easily onto the pump and defines a flow path through which the medication is discharged to the catheter. The side port assembly includes an access port to permit transcutaneous needle access to the discharge flow path, in combination with a check valve to prevent backflow within the discharge flow path. The discharge side access port can be used to flush residue from the catheter, or in combination with a primary refill port on the pump to flush the pump and/or to determine actual pump stroke volume.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: November 14, 1995
    Assignee: MiniMed, Inc.
    Inventors: Chad Srisathapat, Virote Indravudh
  • Patent number: 5433710
    Abstract: A medication infusion pump is provided for use in the programmable delivery of a selected medication to a patient, wherein the pump includes a fluoropolymer valve seat engageable with a nonmetallic valve member. The fluoropolymer valve seat defines a substantially inert and nonadherent surface to prevent accumulation of medication deposits thereon. Such deposits are believed to occur as a result of shear denaturation and/or precipitation in the vicinity of the valve seat, in response to relatively high compression forces applied to the medication as the valve member opens and closes. The fluoropolymer valve seat provides a surface which is particularly nonadherent to protein based medications, such as insulin.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: July 18, 1995
    Assignee: MiniMed, Inc.
    Inventors: William P. VanAntwerp, Virote Indravudh
  • Patent number: 5197322
    Abstract: An improved process and related apparatus are provided for filling a pressure reservoir of an implantable medication infusion pump with a selected pressure fluid, wherein the pressure reservoir is separated by a movable wall from an adjacent medication chamber. The improved filling process includes vacuum-draw filling of the pressure reservoir with relatively purified pressure fluid in liquid state. The specific quantity of pressure fluid within the pressure reservoir is thereafter calibrated by filling the adjacent medication chamber with a calibration fluid at a predetermined positive pressure, thereby expelling excess pressure fluid from the pressure reservoir. The pressure reservoir is then sealed and the performance characteristics thereof are tested under simulated implantation conditions to confirm the capability of the pressure reservoir to maintain medication within the medication chamber under substantially constant pressure conditions.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: March 30, 1993
    Assignee: Minimed Technologies, Ltd.
    Inventor: Virote Indravudh