Patents Assigned to Shiley Incorporated
  • Patent number: 5358689
    Abstract: A hollow fiber blood oxygenator is provided having an plurality of enclosed, coaxial heat exchanger coils, having a common header to insure uniform temperature in the coils. An enclosed fiber bundle is concentrically positioned inside the heat exchanger coils to define a flow path around the coils and through the fiber bundle. The heat exchanger coils and the outside of the fiber bundle are tapered to provide a close fit. Gas manifolds direct gas flow to and from the hollow fibers.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: October 25, 1994
    Assignee: Shiley Incorporated
    Inventors: Kenneth A. Jones, Francis M. Servas, Timothy C. Ryan, Gregory G. Ulrich
  • Patent number: 5124127
    Abstract: A hollow fiber blood oxygenator is provided having a plurality of enclosed, coaxial heat exchanger coils, having a common header to insure uniform temperature in the coils. An enclosed fiber bundle is concentrically positioned inside the heat exchanger coils to define a flow path around the coils and through the fiber bundle. The heat exchanger coils and the outside of the fiber bundle are tapered to provide a close fit. Gas manifolds direct gas flow to and from the hollow fibers.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: June 23, 1992
    Assignee: Shiley, Incorporated
    Inventors: Kenneth A. Jones, Francis M. Servas, Timothy C. Ryan, Gregory G. Ulrich
  • Patent number: 5067496
    Abstract: The specification discloses a tracheostomy tube which includes an outer cannula which has a tubular wall, a distal end for placement within the trachea of a patient and a proximal end for placement outside of the trachea. The outer cannula has an inflatable cuff attached near the distal end thereof for forming a seal with the tracheal wall. A flexible inflation tube extends from within the cuff and has a portion fixedly secured along the wall of the outer cannula to a point that is near, but not at, the proximal end of the outer cannula and further extends unsecured. An annular retaining collar, has a flange with an aperture in longitudinal alignment with the secured portion and which is adapted to receive the inflation tube, and is attached to the proximal end of the outer cannula.
    Type: Grant
    Filed: April 7, 1988
    Date of Patent: November 26, 1991
    Assignee: Shiley Incorporated
    Inventor: Robert F. Eisele
  • Patent number: 4927222
    Abstract: A device for transmitting electromagnetic radiation to a radiation sensitive component and receiving output radiation from said component comprising a radiation-transmissible junction formed by contacting the tip of a first optical fiber with an intermediate portion of a second optical fiber, said junction being encased in an opaque, radiation reflective jacket. A method for determining a desired parameter using such device is also disclosed.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: May 22, 1990
    Assignee: Shiley Incorporated
    Inventors: Tadao Kamiya, Matthew J. Leader
  • Patent number: 4833091
    Abstract: A method of measuring the concentration of carbon dioxide in a medium by determining the water content in a pH-independent sensor system comprising an optical fiber having attached thereto a fluorescence indicator embedded in a carrier matrix containing a miscible mixture of water and non-aqueous solvent in predetermined proportions and being separated from said medium by a gas-permeable, water-impermeable diffusion membrane, said indicator, when excited by excitation radiation of a predetermined wavelength, emitting fluorescent emission whose intensity is dependent upon the ratio of water to non-aqueous solvent present in the system such that the ratio of intensities of emitted radiation is therefore proportional to the amount of water present and diffusion of carbon dioxide through said gas-permeable membrane and subsequent reaction with water to deplete the water content of the system induces a change in the intensities of said emissions, which method comprises transmitting excitation radiation through sai
    Type: Grant
    Filed: February 6, 1987
    Date of Patent: May 23, 1989
    Assignee: Shiley Incorporated
    Inventors: Matthew J. Leader, Tadao Kamiya
  • Patent number: 4822127
    Abstract: A multi-channel electromagnetic radiation transmission system comprising a plurality of first cladded optical fibers coupled to at least one second cladded optical fiber through a series of radiation-transmissible junctions each of which is encased in an opaque, radiation reflective jacket, and including means for attachment to radiation sensitive components whose emission signals are adapted to be received without substantial attenuation by a radiation measuring, transducing, recording or retransmitting component. A method for determining a plurality of parameters using such a system is also disclosed.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: April 18, 1989
    Assignee: Shiley Incorporated
    Inventors: Tadao Kamiya, Matthew J. Leader
  • Patent number: 4647416
    Abstract: A ribbed, porous tube suitable for use as a vascular graft prosthesis is prepared by scoring a stretched or unstretched tube of PTFE, stretching the tube at 200.degree.-320.degree. C. to develop the desired porosity, and heat setting the scored, stretched tube at 327.degree.-450.degree. C. while restraining the tube from axial shrinkage.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: March 3, 1987
    Assignee: Shiley Incorporated
    Inventors: Louis Seiler, Jr., Robert F. Rosenbluth
  • Patent number: 4626240
    Abstract: A dual lumen subclavian cannula is disclosed for use in hemodialysis where the lumens are formed by a septum dividing an essentially circular tube longitudinally. The blood return lumen is closed at its distal end by a blunt point and has openings in its side wall proximal to the point. The blood inlet lumen has an open distal end plus openings in the side wall which are proximal to the analogous openings in the blood return lumen. A manifold at the proximal end of the tube separately distributes blood into the return lumen and collects blood from the inlet lumen.
    Type: Grant
    Filed: September 8, 1983
    Date of Patent: December 2, 1986
    Assignee: Shiley Incorporated
    Inventors: William Edelman, Michael Baranowski
  • Patent number: 4588399
    Abstract: A cannula for insertion into a body cavity, duct, or vessel of a patient includes a parent cannula member and an integral radiopaque tip. The tip is configured so as to be distinguishable from internal body parts in an X ray or flouroscopic image, thus serving to precisely locate the position of the cannula within the patient without substantially obstructing the physician's view of such body parts. The cannula tip and parent member are separately pre-formed from a non-toxic polymeric material and can be constructed so as to have different hardnesses. In one embodiment, the tip is softer than the parent member in order to prevent internal injury to the patient, while in a second embodiment the tip is harder than the parent member for facilitating certain catheterization applications. The pre-formed tip and parent member are then dielectrically heated and welded securely together to form a unitary, integral cannula.
    Type: Grant
    Filed: April 3, 1984
    Date of Patent: May 13, 1986
    Assignee: Shiley Incorporated
    Inventors: Perry A. Nebergall, Robert C. French
  • Patent number: 4585453
    Abstract: A disposable heart valve holder is correctly prepositioned on a prosthetic heart valve and is provided with a pair of resilient fingers in snapping engagement with the interior surface of an annular prosthesis. Each finger of the holder is provided with a detent for retention of the heart valve ring and with a grip for manual manipulation of the holder. The holder is rotatably removed or reattached to the heart valve in order to reduce trauma to the patient and decrease the time required for replacement surgery. One of the fingers of the holder is relatively more flexible than the other and is provided with a tapered leading edge in order to facilitate the removal or reattachment of the holder.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: April 29, 1986
    Assignee: Shiley, Incorporated
    Inventors: Richard L. Martin, Michael B. Baranowski
  • Patent number: 4568367
    Abstract: A blood defoamer for use in surgical procedures is disclosed comprising a porous defoaming element, a non-porous end piece in contact with a surface of the defoaming element, and a layer of fabric affixed to the end piece adjacent to said surface. Bypass of blood flow around the layer of fabric, which is situated downstream of the defoaming element, and accumulation of bubbles in the defoamed blood reservoir are prevented by bonding a suitably configured retaining ring to the end piece with a portion of the layer of fabric held in a fluid-tight seal between the end piece and the retaining ring.
    Type: Grant
    Filed: November 15, 1982
    Date of Patent: February 4, 1986
    Assignee: Shiley Incorporated
    Inventors: Robert F. Gremel, Kenneth M. Galt
  • Patent number: 4556489
    Abstract: A novel device for mass transfer across a membrane is disclosed, which is particularly suitable for use as a blood oxygenator. The novel device is of the type having a pleated, selectively permeable membrane defining first and second sets of alternating pockets for the flow of a fluid to be treated (e.g. blood) and a treating fluid (e.g. oxygen), and a discrete support screen disposed within each of the pockets of said first and second sets. Of considerable importance is the feature that the support screens are designed to be substantially interdigitated when the assembly of membrane and support screens is held as a compressed stack within the housing of the device. The novel mass transfer apparatus may be utilized as a compact blood oxygenator with excellent gas transfer rates, low pressure drops and negligible trauma to blood components.
    Type: Grant
    Filed: March 9, 1983
    Date of Patent: December 3, 1985
    Assignee: Shiley Incorporated
    Inventors: Lambert J. Diettrich, Jr., Francis M. Servas
  • Patent number: 4550447
    Abstract: A porous tube suitable for use as a vascular graft prosthesis is disclosed. It is reinforced by external ribs, integral with the tube wall. These ribs are generally transverse to the tube axis and less porous than the wall. Suitable tubing can be made from polymers exhibiting a significant degree of crystallinity, preferably polytetrafluoroethylene. Methods for making these ribbed, porous tubes are also disclosed.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: November 5, 1985
    Assignee: Shiley Incorporated
    Inventors: Louis Seiler, Jr., Robert F. Rosenbluth
  • Patent number: 4502159
    Abstract: Novel tubular prostheses, e.g. vascular or ureteral prostheses, prepared by sewing the opposed edges of a sheet of pericardial tissue together with a thread to form a longitudinal seam are disclosed. By disposing the thread in a suitable configuration along the seam, for example in a plurality of stitches each of which is secured with a knot, a tubular prosthesis results that can be cut transversely between its ends without unravelling the thread and substantially damaging the same. Use of bovine pericardial tissue is preferred since the range of compliances of tubular prostheses made therefrom is approximately comparable to the range in human arteries and veins, whereas tubular prostheses made from porcine pericardial tissue tend to be too compliant.
    Type: Grant
    Filed: August 12, 1982
    Date of Patent: March 5, 1985
    Assignee: Shiley Incorporated
    Inventors: E. Aubrey Woodroof, Philip S. Yang
  • Patent number: 4411783
    Abstract: A novel liquid filter of the "outside-in" type is disclosed, comprising a hollow tubular housing, a concentrically disposed perforated tubular core surrounded by a cylindrical filter element and communicating with a liquid outlet in the bottom wall of the housing, and a filter element cap covering the upper ends of the perforated core and filter element. A gas vent is located at the highest point in the top wall of the housing, which is at the center of the top wall. The liquid inlet and filter element cap are designed to provide for establishment of a stable swirling flow outside the filter element and above the filter element cap. An improved means of bonding upper and lower cup-like portions together to form a hollow tubular housing with high resistance to rupture under pressure is also disclosed. The filter of the invention is particularly suited for use in extracorporeal blood flow circuits, most particularly as an arterial blood filter located downstream from a blood oxygenator.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: October 25, 1983
    Assignee: Shiley Incorporated
    Inventors: Duane D. Dickens, Francis M. Servas
  • Patent number: 4403983
    Abstract: A dual lumen subclavian cannula is disclosed for use in hemodialysis where the lumens are formed by a septum dividing an essentially circular tube longitudinally. The blood return lumen is closed at its distal end by a blunt point and has openings in its side wall proximal to the point. The blood inlet lumen has an open distal end plus openings in the side wall which are proximal to the analogous openings in the blood return lumen. A manifold at the proximal end of the tube separately distributes blood into the return lumen and collects blood from the inlet lumen.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: September 13, 1983
    Assignee: Shiley Incorporated
    Inventors: William Edelman, Michael Baranowski
  • Patent number: 4323072
    Abstract: A cannula used in the distention and irrigation of a saphenous vein which is being tested prior to use as a coronary or peripheral bypass graft includes a tapered and beveled tip which allows easy insertion into the vein, and a sloping shoulder just proximal to the tip which provides a convenient site for firmly securing the vein to the cannula with a ligature. The cannula can be utilized in a distention and irrigation apparatus which includes a pressure limiting device having a resilient membrane reservoir which limits static pressure delivered to the vein to a predetermined level. The device is connected between the cannula of the present invention and a syringe filled with irrigation fluid.
    Type: Grant
    Filed: May 8, 1980
    Date of Patent: April 6, 1982
    Assignee: Shiley, Incorporated
    Inventors: Robert F. Rosenbluth, Lawrence I. Bonchek
  • Patent number: 4276132
    Abstract: This invention relates to the electrochemical machining of integrally formed prosthetic heart valve structures in which both the structural integrity of the valve and the blood flow through the valve is improved as a result of the integral formation of the valve structure. In particular, such heart valves comprise a ring and a pendant structure, such as a strut, for supporting the opening and closing of a discoid valve occluder. Integral formation of the strut with the ring permits the cross-sectional shape of the strut to be machined without overheating and distortion to conform to a teardrop shape having favorable fluid-dynamic characteristics thereby improving the flow of blood through the valve across the strut. The integral formation of the strut with the ring further results in the elimination of the weld fillet between the strut and the ring, thereby permitting the height of the ring to be reduced, which further improves the fluid dynamic characteristics of the valve.
    Type: Grant
    Filed: March 8, 1979
    Date of Patent: June 30, 1981
    Assignee: Shiley Incorporated
    Inventors: Bruce E. Fettel, Paul E. Morris, Leo J. Lichte
  • Patent number: D281717
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: December 10, 1985
    Assignee: Shiley Incorporated
    Inventors: Todor Pavlov, Badri Gupta
  • Patent number: D320445
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: October 1, 1991
    Assignee: Shiley Incorporated
    Inventors: Kenneth A. Jones, Francis M. Servas, Ned M. Santos