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: 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
  • Publication number: 20070277815
    Abstract: A medical assembly includes a platform which is securely mountable to an operating room fixture, and a plurality of arms or arm modules coupled to the platform and each with a grasper for holding a surgical instrument or port. The medical assembly is particularly applicable for laparoscopic surgery although it is not limited thereto.
    Type: Application
    Filed: January 29, 2007
    Publication date: December 6, 2007
    Inventors: Sundaram Ravikumar, H. Alward, Steven Wysocki, Guy Osborne
  • Publication number: 20070250112
    Abstract: A minimally invasive surgical assembly broadly includes an outer hollow needle 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 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 intstrument extended 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: March 13, 2007
    Publication date: October 25, 2007
    Inventors: Sundaram Ravikumar, H. Alward, Steven Wysocki, Guy Osborne, Robert Smith
  • Patent number: 7276037
    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 chamber. 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) is operably disposed between the extremity and the flexible member whereby it applies increased localized pressure to the extremity during use.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: October 2, 2007
    Assignee: Sun Scientific, Inc.
    Inventor: Sundaram Ravikumar
  • Publication number: 20070213767
    Abstract: A minimally invasive surgical assembly includes an outer hollow needle which may be used in puncturing skin to insert and advance the surgical instrument into the body, and a coaxial surgical instrument having a shaft which extends through the outer hollow needle. The outer diameter of the needle may be dimensioned such that a wound formed from the hollow needle puncturing the skin is capable of being closed independent of stitching, and may be approximately 2 mm or smaller. 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.
    Type: Application
    Filed: January 19, 2007
    Publication date: September 13, 2007
    Inventor: Sundaram Ravikumar
  • Publication number: 20070213766
    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: May 30, 2006
    Publication date: September 13, 2007
    Inventor: Sundaram Ravikumar
  • Publication number: 20070213595
    Abstract: A rake retractor for use in minimally invasive medical procedures such as laparoscopic surgery includes a handle shaft, rake prongs, and end configurations that can be used to move elements within a body cavity. The prongs of the rake retractor are biased to an open position such that when the rake prongs extend out of the needle they open, and they are closed by relative movement of the needle over them. The end configurations are offset so that they may be compactly brought together within the narrow space of a needle having a diameter typically not greater than 2.5 mm.
    Type: Application
    Filed: January 18, 2007
    Publication date: September 13, 2007
    Inventor: Sundaram Ravikumar
  • Publication number: 20070161933
    Abstract: A garment that includes at least one inflatable chamber for applying compression to a limb for assisting venous return, and an elevation member to elevate the limb. The elevation member may comprise an inflatable chamber, and the garment may be configured for compressive therapy of the leg while elevating the heel, eliminating or otherwise reducing or mitigating pressure on an individual's heel while the leg is in an extended position and undergoing compressive therapy.
    Type: Application
    Filed: July 27, 2006
    Publication date: July 12, 2007
    Inventor: Sundaram Ravikumar
  • Publication number: 20070095353
    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: Application
    Filed: February 17, 2006
    Publication date: May 3, 2007
    Inventor: Sundaram Ravikumar
  • Patent number: 7195592
    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 embodiments, a planetary gear train, cable assemblies and lever arms may be used to control radial movement of the retraction members with respect to the central axis.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: March 27, 2007
    Inventors: Sundaram Ravikumar, John Rutkowski
  • Publication number: 20060247564
    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: Application
    Filed: May 2, 2005
    Publication date: November 2, 2006
    Inventor: Sundaram Ravikumar
  • Publication number: 20060241541
    Abstract: An improved therapeutic bandage that covers a wound (e.g., ulcer) in the heel region of the human foot includes at least one skin contacting region disposed about the periphery of the bandage. The skin-contact region has adhesive material for removably affixing the bandage to the skin. A central portion supports a hydrophilic foam sponge that is operably disposed adjacent the wound and absorbs bodily fluids that emanate from the wound. An integral air bladder is reduces pressure applied to the wound. Preferably, the foam sponge can be inserted and removed from at least one pocket defined by the central portion. The foam sponge may be loaded with a therapeutic drug.
    Type: Application
    Filed: May 2, 2005
    Publication date: October 26, 2006
    Inventor: Sundaram Ravikumar
  • Publication number: 20050283181
    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: June 21, 2004
    Publication date: December 22, 2005
    Inventor: Sundaram Ravikumar
  • Publication number: 20050215863
    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: Application
    Filed: May 5, 2005
    Publication date: September 29, 2005
    Inventors: Sundaram Ravikumar, Mark Peyser
  • Publication number: 20050187501
    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: Application
    Filed: April 20, 2005
    Publication date: August 25, 2005
    Inventor: Sundaram Ravikumar