Patents by Inventor Robert J. Todd

Robert J. Todd 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: 20030216688
    Abstract: A novel improved enhanced cardiac surgical method yields unexpected results by having an enhanced intraluminally emplaced cooling system. In preferred device embodiments improvements include a first means for draining venous blood from at least one of the right atrium, superior vena cava and inferior vena cava and an improved means for cooling involved luminal surfaces. Tissue insult and injury is substantially mitigated by engagement of the cooling means with select aspects of involved atrial tissue to facilitate transfer of heat. Methods for making embodiments of the invention are provided. A method for the treatment of cardiac disease using the improved enhanced cardiac surgical cooling system, and an article of manufacture, comprising packaging material and the device are also taught.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 20, 2003
    Inventors: Huybregts M.A.J.M., Robert J. Todd, Alison S. Curtis
  • Patent number: 6254578
    Abstract: An improved aortic cannula is provided for use in heart by-pass surgery. The cannula includes an elongated tube with a terminal end. The terminal end has a ramped surface leading to the discharge opening. The ramped surface terminates in a lip having a tapered leading edge with a point for insertion of the cannula into the aorta. The tapered leading edge spreads a previously made incision to facilitate entry of the terminal end of the cannula into the aorta. With the improved cannula of the present invention, the size of the incision in the aorta is minimized and the damage or tearing of the aorta is eliminated or minimized. This ease of insertion also reduces the time required in the procedure of inserting the cannula into the aorta.
    Type: Grant
    Filed: December 28, 1998
    Date of Patent: July 3, 2001
    Inventors: Ronald K. Grooters, Robert J. Todd
  • Patent number: 6231601
    Abstract: A method of surgery including bending a multi-purpose surgical implement handle that has proximal and distal ends. A gripping section is located toward the proximal end, and an attachment section is located toward the distal end. An adjusting section is interposed between the gripping section and the attachment section. The adjusting section may be bent by a human user at virtually any discrete location along the section. The adjusting section may include an increased-adjustability portion which is easier to bend than other portions of the adjusting section. The method includes attaching a surgical implement to the attaching section of the handle, and bending the adjusting section at least once prior to inserting the implement through a surgical opening to a surgical field. The method further may include bending the adjusting section more than once to form multiple bends therein.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 15, 2001
    Assignee: Edwards Lifesciences Corporation
    Inventors: Keith Myers, Ross Bartholomew, Robert J. Todd, Carl Swindle, Charles Weyrauch, Richard Rhee, Jane Li, Jerry Jackman, Victor Packham
  • Patent number: 6004329
    Abstract: A multi-purpose surgical implement handle has proximal and distal ends. A gripping section is located toward the proximal end, and an attachment section is located toward the distal end. An adjusting section is interposed between the gripping section and the attachment section. The adjusting section may be bent by a human user at virtually any discrete location along the section. The adjusting section may include an increased-adjustability portion which is easier to bend than other portions of the adjusting section.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: December 21, 1999
  • Patent number: 5876383
    Abstract: An improved aortic cannula is provided for use in heart bypass surgery. The cannula includes an elongated tube with a terminal end. The terminal end has a ramped surface leading to the discharge opening, with a lip extending approximately 70.degree.-90.degree. to the longitudinal axis of the cannula at the bottom of the discharge opening. The curved surface and lip cause the blood to exit the cannula opening in a direction approximately 70.degree.-90.degree. from the longitudinal axis of the cannula, and in a direction toward the ascending aorta. With the improved cannula of the present invention, no blood is directed towards the aortic arch, thereby minimizing the risk of stroke from dislodged plaque commonly found in the aortic arch. The curved surface of the terminal end also reduces the blood flow turbulence, thereby decreasing pressure requirements. The width of the opening allows blood to be discharged in a broadcast band with a radius of approximately 90.degree..
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: March 2, 1999
    Inventors: Robert K. Grooters, Robert J. Todd
  • Patent number: 5556386
    Abstract: Pressure relief valve apparatus is disclosed for shunting fluids under conditions of overpressure, thereby preventing further increases in the pressure within a fluid delivery system. A presently preferred embodiment of the apparatus of the invention is formed of two components, a valve body member and a valve tube member. The valve body member is provided with first and second connector elements for use in connecting the pressure relief valve into a medical fluid delivery circuit. It is also provided with first and second bores passing through the first and second connector elements, respectively, and exiting at respective first and second exit ports on the side of the valve body member. A valve seat comprising a raised annular ridge around the circumference of the valve body member separates the first and second exit ports.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: September 17, 1996
    Assignee: Research Medical, Inc.
    Inventor: Robert J. Todd
  • Patent number: 5437651
    Abstract: The present invention is directed to a new and useful apparatus and method for absorbing and collecting blood and other fluids which accumulate in a patient during surgical procedures. An absorbent portion is connected to a suction source. When the absorbent portion is placed in contact with the fluid to be collected, the fluid is absorbed by the absorbent portion. Operation of the suction source provides a vacuum which draws the fluid away from the absorbent portion and out of the body. The fluid can be drawn into a receptacle for later cleansing and reuse. A flexible backing plate is attached to the absorbent portion. Channels formed a long the backing plate direct the vacuum evenly across the absorbent portion of the device such that fluid is drawn evenly from the absorbent portion. Suction tubing connects the absorbent portion to the suction source. The absorbent portion and attached backing plate can be folded to fit into small areas.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: August 1, 1995
    Assignee: Research Medical, Inc.
    Inventors: Robert J. Todd, Jaime E. Yagge, James E. Lowe, Terry M. Wonder
  • Patent number: 5423745
    Abstract: This invention relates to balloon catheters for use in infusing a solution into a body passageway, and their methods of use and manufacture. Each catheter contains at least one lumen through which a solution flows into the body. The balloons of each catheter are secured to the proximal end of the catheter, and each have a plurality of protuberances projecting outwardly from the outer surface of the balloons for the purpose of firmly gripping the walls of the body passageway so as to secure placement of the catheter within the passageway. A malleable wire assists in retaining the catheter in position within the body passageway. A double balloon catheter allows sealing of the body passageway to be accomplished separately from securely gripping the walls.
    Type: Grant
    Filed: July 6, 1994
    Date of Patent: June 13, 1995
    Assignee: Research Medical, Inc.
    Inventors: Robert J. Todd, Gary L. Crocker
  • Patent number: 5358481
    Abstract: Methods and apparatus are disclosed for variably controlling the ratio of blood to cardioplegia solution to be administered to a patient. A presently preferred embodiment of the apparatus of the invention comprises a multilumen tubing member having a blood supply lumen and three cardioplegia supply lumens, each having approximately the same tubing wall thickness, but having different inside diameters so that causing flow through different combinations of the cardioplegia lumens will result in different ratios of blood to cardioplegia. The four tubes comprising the multilumen tubing member are advantageously connected by web members, thereby facilitating use with a roller pump and minimizing the tangle of tubes.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: October 25, 1994
    Assignee: Research Medical, Inc.
    Inventors: Robert J. Todd, Kevin G. Marcus
  • Patent number: 5324253
    Abstract: A system for selective removal of certain components from plasma drawn from a patient comprises an extracorporeal blood circulation circuit and a cannula. The extracorporeal blood circulation circuit has an uptake line for transporting blood from the patient, a plasma separator, and a return line connected to the plasma separator for transporting selectively depleted blood from the plasma separator to the patient. The plasma separator is connected to the uptake line for receiving the blood, selectively removing plasma components (e.g., heparin) by separating plasma from whole blood and interfacing such plasma with an adsorption substrate, recombining depleted plasma, and reinfusing selectively depleted blood into the return line for transport to the patient. The cannula has an uptake conduit with an intake end and an exit end, and a return conduit, connected to the uptake conduit, with an outflow end and an entry end.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: June 28, 1994
    Inventors: James C. McRea, Robert J. Todd
  • Patent number: 5226427
    Abstract: This invention relates to a stylet for use with a retrograde cardioplegia catheter and its methods of use. The stylet includes a stylet rod, a handle on the proximal end of the stylet rod and a predetermined curve in the distal end of the stylet rod. The handle has a thumb rest on the proximal end and a one or two finger loops extending outward from the handle. An obturator is located on the distal end of the predetermined curve to impede blood flow through a tip of the cardioplegia catheter during insertion of the catheter. The invention also contemplates methods for using the stylet.
    Type: Grant
    Filed: June 4, 1991
    Date of Patent: July 13, 1993
    Assignee: Research Medical Inc.
    Inventors: Gerald D. Buckberg, James C. McRea, Robert J. Todd
  • Patent number: 5221257
    Abstract: A guide for assisting in the cannulation of a patient comprising a flexible, tubular body having a hollow interior, a proximate end, and a distal end. The proximate end has an opening in communication with the hollow interior of the tubular body, and the distal end has a rounded, reinforced tip with a passageway therethrough which is in communication with the hollow interior. The guide is inserted and advanced to a position desired by the surgeon within a vein or artery, and then a cannula is threaded over the guide and advanced to the desired position before the guide is removed from the patient. The guide may be used in conjunction with a guide wire and/or a dilator.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: June 22, 1993
    Assignee: Research Industries Corporation
    Inventors: Michael Rosenbloom, Alan D. Muskett, Robert J. Todd
  • Patent number: 5084031
    Abstract: A three-way double stopcock and associated tubing is disclosed with which to connect both a cardioplegia solution source and a pressure monitor for the solution selectively and alternatively to either an antegrade cardioplegia catheter or a retrograde cardioplegia catheter. The stopcock includes a hollow valve body with three solution infusion ports communicating to the interior thereof in a coplanar arrangement at a first longitudinal point on the valve body. Three cardioplegia pressure monitoring ports also communicate through the valve body to the interior thereof at a second longitudinal position distinct from the first. Mounted in the valve body is a cylindrical valve core selectively rotatable about the longitudinal axis thereof between a first position in which the cardioplegia solution source and the pressure monitor are coupled to the antegrade cannula and a second position in which the cardioplegia solution source and the pressure monitor are coupled to the retrograde catheter.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: January 28, 1992
    Assignee: Research Medical, Inc.
    Inventors: Robert J. Todd, Douglas L. Smith, Michael N. Kelly
  • Patent number: 5021045
    Abstract: This invention relates to a retrograde cardioplegia catheter and its method of use. The catheter contains two lumens, an infusion lumen through which the cardioplegic solution flows and a pressure sensing lumen for monitoring the fluid pressure at the point where the solution exits the catheter. A slightly tapered, self-filling balloon is secured to the distal end of the catheter. Also, located at the distal end of the catheter is a soft, rounded tip to prevent damage to the sensitive intimal tissues of the coronary sinus. A stylet having a predetermined curve at the distal end and a handle at the proximal end is removably located within the infusion lumen. The predetermined curve at one end of the stylet enables the cardioplegia catheter to be inserted quickly and accurately within the coronary sinus through a very small incision made in the right atrium. After the catheter is securerd in place, the stylet is withdrawn.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: June 4, 1991
    Assignee: Research Medical, Inc.
    Inventors: Gerald D. Buckberg, Robert J. Todd
  • Patent number: 5013296
    Abstract: A cannula adapted for antegrade administration of cardioplegic solutions during surgical procedures on the heart. The cannula includes a flow lumen having a smooth interior surface to reduce hemolysis when blood is passed therethrough during reperfusion. Structures are included to allow the wall of the vessel, generally the aortic root, to be readily pierced so that fluid may pass through the flow lumen of the cannula into the heart. A suture flange is provided to secure the cannula to the heart. A pressure lumen is provided to communicate the pressure within the heart to a location where it can be monitored. A vent line is also provided to allow a surgeon to readily vent fluids out of the heart.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: May 7, 1991
    Assignee: Research Medical, Inc.
    Inventors: Gerald D. Buckberg, Robert J. Todd
  • Patent number: 4804359
    Abstract: An improved venous cannula and obturator for interconnecting the superior and the inferior vena cava to the venous return line of a heart-lung machine. The cannula includes a pair of resilient, divergent hollow branches. The branches are of unequal length. The longer branch is to be received within the inferior vena cava and the shorter branch is to be received in the superior vena cava. The open branch ends are thus longitudinally staggered when the branches are clamped together by the obturator to facilitate insertion of the branch ends through a single incision within the atrium and ultimate disposition of the branches in the superior and inferior vena cavae. The obturator includes an elongated rod with a hub having a pair of axial legs to be received within the branches of the cannula. The obturator is provided to be slidably received with minimal frictional resistance within the interior lumen of the cannula and the cannula branches.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: February 14, 1989
    Assignee: Research Medical, Inc.
    Inventors: Ronald P. Grunwald, Robert J. Todd
  • Patent number: 4784010
    Abstract: An electric robot having a base unit which is rotatable about a vertical first axis is provided with a horizontal second axis to which is pivotally mounted a vertical arm. At the other end of the vertical arm, a horizontal arm is mounted which has at the end thereof a wrist for carrying a tool such as a spray gun. Motors for operation of the wrist are placed coaxially with the second axis and are placed inside the shafts for the horizontal and vertical arms. The counterbalancing mechanisms have an axis of motion which is parallel to the second axis, pulleys being used to change the direction of the tensioning cables from tangential to the second axis to parallel to the second axis.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: November 15, 1988
    Assignee: Graco Robotics Inc.
    Inventors: Dale A. Wood, Robert J. Todd, Norman N. Fender
  • Patent number: D308213
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: May 29, 1990
    Assignee: Graco Inc.
    Inventors: Gary L. Jones, Robert J. Todd, Norman N. Fender, Dale A. Wood, Alexander Bally
  • Patent number: RE33360
    Abstract: The disposable transducer includes a small housing constructed of lightweight plastic material. The housing is shaped so as to form a transparent chamber within which is situated a very small piezoresistive strain gauge in the form of a resistive bridge network diffused onto a semiconductor substrate. The semiconductor substrate is electrically isolated by means of a nonconductive gel which partially fills the transparent chamber in which the semiconductor substrate is positioned. The resistive bridge network of the semiconductor substrate is also electrically connected to a plurality of calibration resistors which are separately formed on the semiconductor substrate, making the entire apparatus economically disposable after a single use.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: October 2, 1990
    Assignee: Abbott Laboratories
    Inventors: Gordon S. Reynolds, Robert J. Todd, Edward J. Russell
  • Patent number: D335705
    Type: Grant
    Filed: June 4, 1991
    Date of Patent: May 18, 1993
    Assignee: Research Medical, Inc.
    Inventors: Gerald D. Buckberg, Robert J. Todd