Patents by Inventor Sundaram Ravikumar

Sundaram Ravikumar 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: 20110087142
    Abstract: A compression garment includes a backing member with a proximal end portion and opposed distal end portion. The backing member is configured to be disposed about at least a portion of a lower leg between calf and heel and has an inner surface to be disposed facing the lower leg, and an opposite outer surface. The garment further includes at least one compression bladder disposed within the backing member configured to compress at least a portion of the lower leg to augment venous return flow in the lower leg, an elevation member operatively coupled to the backing member and configured to elevate the heel from an underlying support surface and at least one support member disposed along a portion of the elevation member and along a portion of the backing member to retain the elevation member in a desired position with respect to the backing member to elevate the heel.
    Type: Application
    Filed: October 25, 2010
    Publication date: April 14, 2011
    Applicant: Sun Scientific, Inc.
    Inventors: Sundaram Ravikumar, Guy Osborne, Vikram Ravikumar, Timothy J. Nolan
  • Patent number: 7909787
    Abstract: A method and apparatus for eliminating or otherwise reducing or mitigating pressure on an individual's heel while the leg is in an extended position, while allowing for ambulation without completely removing the device. An apparatus comprises a support member configured to be attached to a lower leg portion of an individual between the calf and heel region, the support member having an inner surface portion to be disposed facing the leg when attached thereto, and having an opposite outer surface; and a reconfigurable elevation member configured (i) to be disposed at the outer surface of the support member such that when the support member is attached to the lower leg portion of the individual the elevation member is selectively capable of providing elevation of the heel from an underlying surface in the event that the lower leg portion is extended above the underlying surface, and (ii) to be reconfigured for ambulation without removing said support member from the lower leg.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: March 22, 2011
    Inventor: Sundaram Ravikumar
  • Publication number: 20110034948
    Abstract: An improved catheter device includes an elongate shaft having a distal portion adapted to be disposed with the abdominal aorta and a plurality of expandable members disposed thereon. One expandable member is dimensioned and configured so that it rests within the iliac bifurcation when expanded. At least two expandable members are spaced apart from the one expandable member and configured to selectively occlude blood flow to different abdominal/pelvic arteries when expanded. Preferably, the distal-most and the proximal-most expandable members are spaced apart at a distance more than 20 cm and less than 40 cm (and most preferably on the order of 30 cm). The expandable members are preferably realized by four inflatable balloons controlled by fluidic pressure supplied thereto via corresponding inflation lumens in the shaft. The catheter device can be fixated within the abdominal aorta and manipulated in order to quickly and efficiently identify and isolate a hemorrhage flowing from an abdominal artery.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 10, 2011
    Inventor: Sundaram Ravikumar
  • Publication number: 20110015491
    Abstract: A surgical access device for use in laparoscopic surgical procedures includes a housing portion and at least one moveable device port. The housing portion has an axial bore extending therethrough, defining a central axis of the surgical access device. The at least one moveable device port is moveable about an annular path corresponding to an annular seal member. Each moveable device port defines a lumen extending therethrough, and each lumen is substantially parallel to the central axis of the surgical access device.
    Type: Application
    Filed: July 16, 2009
    Publication date: January 20, 2011
    Inventors: Sundaram Ravikumar, Allan Alward
  • Patent number: 7849861
    Abstract: An improved catheter device for selectively isolating and occluding a portion of the iliac vasculature of a patient includes an elongate hollow catheter shaft which is advanceable though the vascular system of the patient. The catheter shaft has a proximal portion that extends out from the patient and a distal portion adapted to be disposed within the iliac vasculature of the patient. A plurality of expandable members are disposed on the distal portion. One expandable member is dimensioned and configured so that when expanded it rests within the bifurcation of the descending aorta to the common iliac arteries (and/or within the bifurcation of the inferior vena cava that leads to the common iliac veins) so as to fixate the catheter within the iliac vasculature of the patient. At least two other expandable members are spaced apart from the fixation member and configured to selectively isolate and occlude blood flow through different portions of the iliac vasculature.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: December 14, 2010
    Inventor: Sundaram Ravikumar
  • Patent number: 7850629
    Abstract: An apparatus for applying compression therapy to a portion of the human body includes a flexible member and an air bladder chamber. The flexible member is adapted to wrap around the body portion to secure the air bladder chamber thereto. An air pump inflates the air bladder chamber to a pressurized state. An adjustable pressure regulator is fluidly coupled to the bladder chamber and automatically limits the pressure to a selected amount. The pressure regulator preferably includes a plurality of check valves, each being operable at a different pressure and a selector element. The check valves are fluidly coupled to the selector and the selector is fluidly coupled to the bladder chamber. Operation of the selector fluidly couples one of the check valves to the bladder chamber. According to the presently preferred embodiment, three check valves are provided, operable at 20 mmHg, 30 mmHg, and 40 mmHg.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: December 14, 2010
    Inventor: Sundaram Ravikumar
  • Publication number: 20100292724
    Abstract: A minimally invasive surgical assembly broadly includes an outer tube which has an outer diameter of 3.0 mm or smaller, and a coaxial surgical instrument having a shaft which extends through the outer hollow tube. The coaxial surgical instrument includes end effectors at the end of the shaft. The end effectors include spring arms and wire frame clamp elements defining fenestrations. The spring arms are biased to an open position such that when the end effectors of the surgical instrument extend out of the outer tube they open, and they are closed by relative movement of the outer tube over them. The wire frame clamp elements are biased to an open position such that when they extend out of the outer tube they open and they are closed by relative movement of the outer tube over them.
    Type: Application
    Filed: January 19, 2010
    Publication date: November 18, 2010
    Inventors: Sundaram Ravikumar, H. Allan Alward
  • Patent number: 7771448
    Abstract: An improved catheter device includes an elongate shaft having a distal portion adapted to be disposed with the abdominal aorta and a plurality of expandable members disposed thereon. One expandable member is dimensioned and configured so that it rests within the iliac bifurcation when expanded. At least two expandable members are spaced apart from the one expandable member and configured to selectively occlude blood flow to different abdominal/pelvic arteries when expanded. Preferably, the distal-most and the proximal-most expandable members are spaced apart at a distance more than 20 cm and less than 40 cm (and most preferably on the order of 30 cm). The expandable members are preferably realized by four inflatable balloons controlled by fluidic pressure supplied thereto via corresponding inflation lumens in the shaft. The catheter device can be fixated within the abdominal aorta and manipulated in order to quickly and efficiently identify and isolate a hemorrhage flowing from an abdominal artery.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: August 10, 2010
    Assignee: Arvik Enterprises, LLC
    Inventor: Sundaram Ravikumar
  • Patent number: 7766937
    Abstract: A minimally invasive surgical assembly broadly includes an outer hollow needle which has an outer diameter of approximately 2 mm or smaller, and a coaxial surgical instrument having a shaft which extends through the outer hollow needle. The coaxial surgical instrument includes end effectors at the end of the shaft which are biased to an open position such that when the end effectors of the surgical instrument extend out of the needle they open, and they are closed by relative movement of the needle over them. The assembly preferably includes a first fixing element which is used to fix the relative location of the surgical instrument and the needle. The assembly also preferably includes a second fixing element which moves relative to the needle and is located on the outside thereof and which is used to fix the relative location of the needle to the patient.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: August 3, 2010
    Assignee: Mini-Lap Technologies, Inc.
    Inventor: Sundaram Ravikumar
  • Publication number: 20100016884
    Abstract: A minimally invasive surgical assembly broadly includes an outer hollow needle which has an outer diameter of approximately 2 mm or smaller, and a coaxial surgical instrument having a shaft which extends through the outer hollow needle. The coaxial surgical instrument includes end effectors at the end of the shaft which are biased to an open position such that when the end effectors of the surgical instrument extend out of the needle they open, and they are closed by relative movement of the needle over them. The assembly preferably includes a first fixing element which is used to fix the relative location of the surgical instrument and the needle. The assembly also preferably includes a second fixing element which moves relative to the needle and is located on the outside thereof and which is used to fix the relative location of the needle to the patient.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 21, 2010
    Applicant: MINI-LAP TECHONOLOGIES, INC.
    Inventor: Sundaram Ravikumar
  • Publication number: 20090275889
    Abstract: An improved catheter device for selectively isolating and occluding a portion of the iliac vasculature of a patient includes an elongate hollow catheter shaft which is advanceable though the vascular system of the patient. The catheter shaft has a proximal portion that extends out from the patient and a distal portion adapted to be disposed within the iliac vasculature of the patient. A plurality of expandable members are disposed on the distal portion. One expandable member is dimensioned and configured so that when expanded it rests within the bifurcation of the descending aorta to the common iliac arteries (and/or within the bifurcation of the inferior vena cava that leads to the common iliac veins) so as to fixate the catheter within the iliac vasculature of the patient. At least two other expandable members are spaced apart from the fixation member and configured to selectively isolate and occlude blood flow through different portions of the iliac vasculature.
    Type: Application
    Filed: May 1, 2008
    Publication date: November 5, 2009
    Inventor: Sundaram Ravikumar
  • Publication number: 20090259225
    Abstract: A minimally invasive surgical assembly broadly includes an outer hollow needle which has an outer diameter, a longitudinal axis, and a sharp distal end. An insulating member extends through the hollow needle and is movable relative to the hollow needle. An elongated member extends through the insulating member and is movable relative to both the insulating member and the hollow needle. A resilient wire projects from the elongated member and is retractable within and extendable outside of the insulating member and the hollow needle. The insulating member, elongated member, and resilient wire are movable relative to the needle using first and second moving means whereby the surgical assembly assumes various configurations having different operational functions.
    Type: Application
    Filed: April 9, 2008
    Publication date: October 15, 2009
    Inventors: Sundaram Ravikumar, H. Allan Alward, Robert F. Smith, JR.
  • Publication number: 20090204037
    Abstract: An apparatus applies pressure to a portion of the human body using two fluidly coupled pressurized members. The apparatus includes fluidly coupled foot and leg bladders, each having an inflatable chamber accommodating an entering fluid. Optional straps locate the bladders to portions of the body such as a leg and the bottom of a foot, whereby the apparatus is operated through the walking motion. The foot bladder deflates as the heel strikes the ground, thereby forcing fluid out of the foot bladder, through a fluid conduit, and into the leg bladder, which raises the pressure therein. When the heel is raised, some fluid is forced out of the leg bladder, back through the conduit, and into the foot bladder. This process repeats as a person walks, which creates a pumping or kneading force on the leg, thereby promoting blood flow, drainage, treatment, and healing.
    Type: Application
    Filed: February 12, 2008
    Publication date: August 13, 2009
    Inventor: Sundaram Ravikumar
  • Patent number: 7559908
    Abstract: An apparatus is provided for applying compression therapy to an extremity of the human body, such as a portion of the human leg. The device includes a flexible member and an air bladder. The flexible member is adapted to wrap around the extremity to secure the air bladder chamber to the extremity. An air pumping mechanism is operated to inflate the air bladder chamber to a pressurized state. One or more fluid-filled pressurized members are provided, each separate and distinct from the flexible member and the air bladder chamber and thus readily moveable relative to the flexible member and the air bladder chamber. The pressurized member(s) preferably includes a sponge on its underside and is operably disposed between the extremity and the flexible member whereby it applies increased localized pressure to the extremity during use.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: July 14, 2009
    Inventor: Sundaram Ravikumar
  • Publication number: 20090124944
    Abstract: An assembly according to the invention includes a pressure mechanism having a flexible member for attachment to a limb and an air chamber which may be pumped up into a desired pressurized state, a separate relatively small pre-filled air bladder, an absorbent foam, sponge or dressing coupled to the pre-filled air bladder, and a suction conduit coupled to a source of negative pressure (suction) and in fluid communication with the absorbent foam, sponge or dressing. In a preferred embodiment, the pre-filled air bladder, the absorbent foam, sponge or dressing and the suction conduit are formed together as a unit.
    Type: Application
    Filed: March 21, 2008
    Publication date: May 14, 2009
    Inventor: Sundaram Ravikumar
  • Patent number: 7363927
    Abstract: A blood vessel occluding device including a plug and an insertion device to temporarily occlude a blood vessel. In one embodiment, the plug has an axially symmetric shape and is made of a biocompatible material such as Silicone. The plug is inserted axially into the blood vessel and is gripped firmly by the walls of the blood vessel. A filament is attached to an inner surface of the plug. Pulling the filament exerts compressive force on the plug, causing the plug to collapse and facilitating the removal of the plug. The blood vessel occluding device allows the blood vessel to be occluded quickly and effectively. The insertion device is a spring loaded device that has a spring activated needle; this insertion device provides the axial force to insert the plug into the blood vessel.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: April 29, 2008
    Assignee: Arvik Enterprises, LLC
    Inventor: Sundaram Ravikumar
  • Publication number: 20080086166
    Abstract: A minimally invasive surgical assembly broadly includes an outer hollow needle which has an outer diameter of at most 3.0 mm, and a coaxial surgical instrument having a shaft which extends through the outer hollow needle. The coaxial surgical instrument includes a balloon or inflatable bladder at the end of the shaft which may be inflated and deflated. The assembly preferably includes a first fixing element which is used to fix the relative location of the surgical balloon instrument and the needle. The assembly also preferably includes a second fixing element which moves relative to the needle and is located on the outside thereof and which is used to fix the relative location of the needle to the patient.
    Type: Application
    Filed: March 13, 2007
    Publication date: April 10, 2008
    Inventor: Sundaram Ravikumar
  • Patent number: 7344495
    Abstract: An improved surgical retraction apparatus (and corresponding method of operation) includes a plurality of rigid retraction members disposed about a central axis that move radially with respect to the central axis between a closed state and an open state. In the closed state, the retraction members form a central opening that is adapted to closely fit around the tubular section of a surgical port device. In the illustrative embodiment, a planetary gear train, cable assemblies, lever arms or two annular slotted plates used to control radial movement of the retraction members with respect to the central axis.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: March 18, 2008
    Assignee: Arvik Enterprises, LLC
    Inventors: Sundaram Ravikumar, Mark Peyser
  • Patent number: 7326230
    Abstract: An improved device for closing an opening in a blood vessel includes a cannula holding a first wire group, a second wire group, and a wire fixation device. The positions of the first wire group and second wire group are independently adjustable. The first wire group is deployed from the cannula into an interior region of the blood vessel and retracted to a desired position in contact with an intimal surface of the blood vessel around the opening. The second wire group is deployed from the cannula and moved to a desired position in contact with an adventitial surface of the blood vessel around the opening. The fixation device is adapted to affix the first and second wire groups in their desired positions to thereby effectuate closure of the opening in the blood vessel.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: February 5, 2008
    Inventor: Sundaram Ravikumar
  • Publication number: 20070282170
    Abstract: A rake retractor is provided which is preferably used in conjunction with a hollow needle having a diameter of 2.5 mm or smaller. The rake retractor broadly includes a shaft coupled to a plurality of free ends. The needle and/or rake retractor are preferably provided with a mechanism for locking the shaft of the rake retractor relative to the needle so that the rake retractor and needle can be fixed in place relative to each other. The free ends or prongs of the retractor at the end of the shaft are biased to an open position. When the rake rectractor is extended through the needle such that the free ends extend outside the needle, the free ends open up in a rake configuration. When the rake rectractor is pulled back relative to the needle such that the needle extends over the free ends, the free ends assume a closed position.
    Type: Application
    Filed: December 14, 2006
    Publication date: December 6, 2007
    Inventor: Sundaram Ravikumar