Patents Assigned to Salviac Limited
  • Publication number: 20040073198
    Abstract: An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval.
    Type: Application
    Filed: March 26, 2003
    Publication date: April 15, 2004
    Applicant: Salviac Limited
    Inventors: Paul Gilson, Eamon Brady, Padraig Maher, David Vale, Charles Taylor
  • Publication number: 20040073230
    Abstract: A catheter (2) is used in medical applications, for example for the retrieval of a sample from a patient or the insertion or retrieval of medical devices such as filters, stents (3) to and from the patient. The catheter (2) includes an expandable tip (6) at a leading portion of a catheter tube portion (5). This expandable tip (6) can retrieve or deliver samples, medical devices, etc. (3), which are slightly larger than the dimensions of a main catheter tube (5) inserted into the patient. The expandable tip (6) can also include extension members (10) which provide axial support to the expandable tip (6) but which still allow expansion in the radial direction.
    Type: Application
    Filed: March 7, 2003
    Publication date: April 15, 2004
    Applicants: ANSAMED Limited, SALVIAC Limited
    Inventors: Patrick Mulholland, Gerard O'Carroll, Dominic Conlon, David Vale, Eamon Brady
  • Publication number: 20040006365
    Abstract: A retrieval catheter 1 comprises a distal tubular sheath 2 with a reception space 5 into which an embolic protection filter 10 may be retrieved. An elongate connector 10 extends proximally from the sheath 2 to allow a clinician to control movement of the sheath 12. The sheath 2 is backloaded over a procedural catheter such as a balloon catheter 20, for example for post dilitation of a stent 55. The procedure is more efficient and procedure time is reduced because a catheter system is provided which allows a procedural step to be carried out and a filter 50 to be retrieved.
    Type: Application
    Filed: May 13, 2003
    Publication date: January 8, 2004
    Applicant: SALVIAC LIMITED
    Inventors: Eamon Brady, Charles Taylor, Patrick Griffin, Brendan Casey, David Vale
  • Patent number: 6669716
    Abstract: A rapid exchange stent delivery catheter for delivery and deployment of a stent has a catheter shaft having a guidewire lumen defined by a passageway with an entrance and an exit. The stent is of a shape memory metallic alloy and is constrained by a sheath. The sheath has an elongate slot aligned with the guidewire lumen entrance so that a guidewire is not obstructed during movement of the sheath to deploy the stent. The sheath is pulled back linearly by a thumbscrew mechanism to deploy the stent.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: December 30, 2003
    Assignee: Salviac Limited
    Inventors: Paul Gilson, Gary S. Roubin
  • Publication number: 20030236545
    Abstract: A catheter (1) for transvascular deployment of a radially compressible medical device (16) has a tubular outer body (2) within which is slidably mounted an inner tubular sheath (3) which in turn houses a guide wire (4) which is axially movable through the sheath (3). The medical device (6) is mounted on the guide wire (4) and can be collapsed within the sheath (3) and body (2) for deployment. An outer distal end of the sheath (3) is provided with circumferentially spaced-apart axial slits (7) extending proximally from the distal end of the sheath (3) which sub-divide the distal end of the tubular side wall of the sheath (3) into a number of complementary tube sections (8) which are movable apart when the sheath (3) is pushed out of the distal end of the body (2) to engage or deploy the medical device (6).
    Type: Application
    Filed: November 26, 2002
    Publication date: December 25, 2003
    Applicant: Salviac Limited
    Inventor: Paul Gilson
  • Publication number: 20030229374
    Abstract: An embolic protection system comprises an embolic protection filter 1 having a collapsed delivery configuration and an expanded deployed configuration. The filter 1 is housed in the collapsed configuration in a reception space of a delivery catheter 20. The delivery catheter 20 containing the filter 1 is housed in a sealed sterile pouch 35. The filter 1 may be coated with a non-thrombogenic coating and an adhesion preventer 9 such as a silicon gel is used to substantially prevent adhesion of adjacent folds of the filter 1 when the filter is in the collapsed configuration in the delivery catheter 20.
    Type: Application
    Filed: May 12, 2003
    Publication date: December 11, 2003
    Applicant: SALVIAC LIMITED
    Inventors: Eamon Brady, Gary Fahey, Brendan Casey, Ann Marie Cannon, David Vale, Martin Keegan
  • Patent number: 6645224
    Abstract: An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: November 11, 2003
    Assignee: Salviac Limited
    Inventors: Paul Gilson, Eamon Brady, Padraig Maher, David Vale, Charles Taylor
  • Publication number: 20030144687
    Abstract: An embolic protection device comprises a collapsible filter body and a filter support for the filter body. The filter support comprises a support frame defined by at least two wire segments having terminations. The terminations of adjacent segments are fixed relative to one another and extend generally parallel in a bifilar manner for enhanced trackability and flexibility.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 31, 2003
    Applicant: Salviac Limited
    Inventors: Eamon Brady, David Vale, Ronald Kelly, John Neilan, Steven Horan, Gerard Rabitte, Gerry McCaffrey
  • Publication number: 20030144688
    Abstract: An embolic protection device comprises a collapsible filter element for delivery through a vascular system of a patient The filter element comprises a collapsible filter body 2 and a filter support 3 for the filter body. The filter body has an inlet end 4 and an outlet end 5, the inlet end 4 of the filter body has one or more inlet openings 6 sized to allow blood and embolic material enter the filter body 2 and the outlet end 5 of the filter body has a plurality of outlet openings 107 sized to allow through passage of blood but to retain undesired embolic material within the filter body 2. The filter support 3 is movable between a collapsed position for movement through the vascular system, and an extended outwardly projecting position to support the filter body in an expanded position The filter support 3 comprises a generally tubular support frame defined by at least one wire 16.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 31, 2003
    Applicant: Salviac Limited
    Inventors: Eamon Brady, David Vale, Ronald Kelly, John Neilan, Steven Horan, Gerard Rabitte, Gerry McCaffrey
  • Publication number: 20030144689
    Abstract: An embolic protection device has a support frame incorporating tethering features for connecting the support frame distally and/or proximally and/or intermediately to a carrier. Tethers may also be used additionally or alternatively for connecting various elements of a support frame. The tethers may be used to connect a support hoop 503 to a tubular member 504. The tethers provide added safety and stability to the frame without any increase in the length of the device when wrapped down for delivery.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 31, 2003
    Applicant: Salviac Limited
    Inventors: Eamon Brady, David Vale, Ronald Kelly, John Neilan, Steven Horan, Gerard Rabitte, Gerry McCaffrey
  • Patent number: 6565591
    Abstract: A collapsible filter element (40) for a transcatheter embolic protection device (1). The filter element (40) comprises a collapsible filter body (41) which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element (40). A proximal inlet portion of the filter body (41) has two inlet openings (50) sized to allow blood and embolic material enter the filter body (41), and a distal outlet portion of the filter body (41) has a plurality of small outlet openings (51) to allow through-passage of blood, but to retain embolic material within the filter body (41). The filter body (41) is of an oriented polymeric material.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: May 20, 2003
    Assignee: Salviac Limited
    Inventors: Eamon Brady, Ronald Kelly
  • Publication number: 20030032977
    Abstract: A medical guidewire assembly comprises a guidewire having a flexible tip. A medical device such as a collapsible filter for use as an embolic protection device is mounted on the guidewire. The filter is advanced through a body lumen with the guidewire tip extending distally. At a first location the filter is advanced relative to the tip to a location which is distally advanced from the first location. Placement of the filter in an optimal distal location is thereby achieved.
    Type: Application
    Filed: July 3, 2002
    Publication date: February 13, 2003
    Applicant: Salviac Limited
    Inventor: Eamon Brady
  • Patent number: 6514280
    Abstract: A catheter for transvascular deployment of a radially compressible medical device has a tubular outer body within which is slidably mounted an inner tubular sheath which in turn houses a guide wire which is axially movable through the sheath. The medical device is mounted on the guide wire and can be collapsed within the sheath and body for deployment. An outer distal end of the sheath is provided with circumferentially spaced-apart axial slits extending proximally from the distal end of the sheath which sub-divide the distal end of the tubular side wall of the sheath into a number of complementary tube sections which are movable apart when the sheath is pushed out of the distal end of the body to engage or deploy the medical device.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: February 4, 2003
    Assignee: Salviac Limited
    Inventor: Paul Gilson
  • Publication number: 20030009189
    Abstract: An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the fitter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval.
    Type: Application
    Filed: January 30, 2002
    Publication date: January 9, 2003
    Applicant: SALVIAC Limited
    Inventors: Paul Gilson, Eamon Brady, Padraig Maher, David Vale, Charles Taylor
  • Patent number: 6432122
    Abstract: An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: August 13, 2002
    Assignee: Salviac Limited
    Inventors: Paul Gilson, Eamon Brady, Padraig Maher, David Vale, Charles Taylor
  • Publication number: 20020107541
    Abstract: A collapsible filter element for a transcatheter embolic protection device comprises a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element. A proximal inlet portion of the filter body has one or more inlet openings sized to allow blood and embolic material enter the filter body and a distal outlet portion of the filter body has a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body. The filter body is at least partially of laminate construction comprising a membrane coated with a coating which is biocompatible, the thickness of the coating being from 4% to 40% of the thickness of the membrane. The coating may be of hydrophilic material.
    Type: Application
    Filed: November 6, 2001
    Publication date: August 8, 2002
    Applicant: Salviac Limited.
    Inventors: David Vale, Eamon Brady
  • Publication number: 20020072550
    Abstract: A biostable porous polyether or polycarbonate polyurethane implant is manufactured from diphenyl methane diisocyanate, difunctional polytetramethylene ether glycol or a polycarbonate polyol, a trimerisation catalyst, a chain extender, water, a cross-linking agent, a blowing and/or gelling catalyst and a surfactant. The porous biomaterial has isocyanurate linkages and avoid content in excess of 85%. The implant may be used as an occluder or a tissue bridge.
    Type: Application
    Filed: November 6, 2001
    Publication date: June 13, 2002
    Applicant: Salviac Limited
    Inventors: Eamon Brady, Ann Marie Cannon, Fergal Farrell
  • Publication number: 20020072584
    Abstract: A biocompatible polymeric material is prepared by forming a three dimensional cross-linked structure of a biocompatible polymeric material such as a polyether or polycarbonate polyurethane and solvent extracting the material with a swelling solvent such as MEK which swells the material by up to 150%. The solvent swollen polymeric material is then de-swelled with a non solvent such as water which is miscible with the extraction solvent. The process produces polymeric materials which do not produce leachables and thereby have properties that are suitable for implantation.
    Type: Application
    Filed: November 6, 2001
    Publication date: June 13, 2002
    Applicant: Salviac Limited.
    Inventors: Eamon Brady, Ann Marie Cannon, Fergal Farrell
  • Publication number: 20020058963
    Abstract: A retrieval device (1) for retrieval of an embolic filter (2) from the vasculature (3) comprises a guide catheter (42), a retrieval catheter (10) and a centering catheter (11) which is threaded over a guidewire (25). The retrieval catheter (10) comprises an elongate flexible tube (15) including a radially expansible distal tip (19) with an open mouth (40) for retrieval of the embolic filter (2). The centering catheter (11) also comprises an elongate tube (20) which extends through the retrieval catheter tube (15) and terminates in a distal tapered end (21). The centering catheter (11) is used to center the retrieval catheter (10) in the vasculature (3) to enable the retrieval catheter (10) to freely pass through a stenosis and/or stent to retrieve the filter (2). When the retrieval catheter (10) is in position the centering catheter (11) is withdrawn through the retrieval catheter (10).
    Type: Application
    Filed: January 14, 2002
    Publication date: May 16, 2002
    Applicant: Salviac Limited
    Inventors: David Vale, Paul Gilson, Patrick Griffin
  • Publication number: 20020042627
    Abstract: A collapsible filter element (40) for a transcatheter embolic protection device (1). The filter element (40) comprises a collapsible filter body (41) which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element (40). A proximal inlet portion of the filter body (41) has two inlet openings (50) sized to allow blood and embolic material enter the filter body (41), and a distal outlet portion of the filter body (41) has a plurality of small outlet openings (51) to allow through-passage of blood, but to retain embolic material within the filter body (41). The filter body (41) is of an oriented polymeric material.
    Type: Application
    Filed: June 25, 2001
    Publication date: April 11, 2002
    Applicant: Salviac Limited
    Inventors: Eamon Brady, Ronald Kelly