Christopher J Davey

US Patent:

6358230, Mar 19, 2002

Filed:

Sep 29, 1998

Appl. No.:

09/163153

Inventors:

Christopher T. Davey - Boston MA

Assignee:

Scimed Life Systems, Inc. - Maple Grove MN

International Classification:

A61M 532

US Classification:

604177

Abstract:

A âslipâ hub design is used with catheters to reduce flexure motion at the hub to catheter shaft connection. The design includes a hub having a section of reduced diameter and having a longitudinal axis extending along the length of the hub. The reduced diameter section has a first length. The design also includes a suture wing component having a first portion with a lumen. Wings extend from the first portion, and in use are sutured to the skin of a patient, or to an anchoring device that is secured to the skin of a patient. The lumen has a second length that is less than the first length. The reduced diameter section of the hub is disposed within the lumen such that the axis extends through the lumen and such that the hub and the suture wing component are movable relative to each other both axially along the axis and rotationally about the axis.

US Patent:

6432091, Aug 13, 2002

Filed:

Dec 16, 1999

Appl. No.:

09/465153

Inventors:

Christopher T. Davey - Boston MA

Assignee:

Sci Med Life Systems, Inc. - Maple Grove MN

International Classification:

A61M 531

US Classification:

604246, 604249

Abstract:

An over-the-wire catheter with a sealable distal end is provided. The distal end is capable for forming a fluid tight seal by action of a hydrophilicly expandable valve. The valve is also a lubricous composition to provide for a guidewire that slidably moves through the distal end of the catheter.

US Patent:

6436077, Aug 20, 2002

Filed:

Aug 7, 2000

Appl. No.:

09/633543

Inventors:

Christopher T. Davey - Boston MA
Matthew N. McCarthy - Randolph MA

Assignee:

Boston Scientific Corporation - Natick MA

International Classification:

A61M 2500

US Classification:

604247, 604 30, 604236, 137848

Abstract:

In an embodiment, a slit valve catheter has a generally tubular catheter body with an exterior surface exposed to an environment and an interior surface defining a lumen. The catheter further includes a valve which has a protuberance projecting radially from the catheter body.

US Patent:

6595966, Jul 22, 2003

Filed:

May 16, 2001

Appl. No.:

09/859090

Inventors:

Christopher T. Davey - Boston MA
Michael R. Sansoucy - Ayer MA
Matthew N. McCarthy - Waltham MA

Assignee:

Scimed Life Systems, Inc. - Maple Grove MN

International Classification:

A61M 500

US Classification:

604264, 604 43, 604525

Abstract:

High flow rate catheters, and related methods, are useful in dialysis and other procedures. A catheter according to the invention comprises a hub and a generally elongated conduit. The conduit has a substantially continuous and smooth wall. The conduit also defines at least one lumen and has a length extending from a proximal end to a distal end of the conduit. The proximal end is coupled to a hub and the distal end has an opening in communication with the lumen. The conduit has a conical shape which tapers along the length.

US Patent:

6723075, Apr 20, 2004

Filed:

Jul 1, 2002

Appl. No.:

10/186834

Inventors:

Christopher T. Davey - Boston MA 02130
Matthew N. McCarthy - Randolph MA 02368

International Classification:

A61M 2500

US Classification:

604247, 604 30, 604236, 137848

Abstract:

In an embodiment, a slit valve catheter has a generally tubular catheter body with an exterior surface exposed to an environment and an interior surface defining a lumen. The catheter further includes a valve which has a protuberance projecting radially from the catheter body.

US Patent:

6808509, Oct 26, 2004

Filed:

Apr 21, 2000

Appl. No.:

09/556102

Inventors:

Christopher T. Davey - Boston MA

Assignee:

SciMed Life Systems, Inc. - Maple Grove MN

International Classification:

A61M 5178

US Classification:

60416704, 60416405

Abstract:

A valved introducer sheath is used to facilitate the insertion of a flexible medical device into a body. The elongated valve of the valved introducer sheath is constructed of a foam material that is injected into the sheath and sliced longitudinally to create one or more self-sealing slits through which flexible medical devices can be passed. As a medial device is passed through the self-sealing slit(s) at a proximal end, the self-sealing slits seal around the medical device before opening at a distal end. The elongated valve is also affixed to at least some of the inner surface of the sheath. The valve will tear into halves along at least one of the self-sealing slits when the sheath is peeled.

US Patent:

6913596, Jul 5, 2005

Filed:

Aug 9, 2002

Appl. No.:

10/215909

Inventors:

Christopher T. Davey - Boston MA, US

Assignee:

SciMed Life Systems, Inc. - Maple Grove MN

International Classification:

A61M005/31

US Classification:

604246, 604249

Abstract:

A catheter with a distal end having a member formed from a hydrophilic composition is provided. The hydrophilic composition expands upon contact with an aqueous fluid to move the member from a quiescent state to an expanded state. The member may provide an open passageway in the quiescent state and be capable for forming a fluid tight seal by action of expansion of the hydrophilic composition. In such a case the member acts as a valve for permitting or preventing fluid flow through the catheter.

US Patent:

7294296, Nov 13, 2007

Filed:

Aug 30, 2004

Appl. No.:

10/929302

Inventors:

Christopher T. Davey - Boston MA, US

Assignee:

Boston Scientific Scimed, Inc. - Maple Grove MN

International Classification:

B29C 44/06

US Classification:

264 466, 264154, 264267

Abstract:

A valved introducer sheath is used to facilitate the insertion of a flexible medical device into a body. The elongated valve of the valved introducer sheath is constructed of a foam material that is injected into the sheath and sliced longitudinally to create one or more self-sealing slits through which flexible medical devices can be passed. As a medial device is passed through the self-sealing slit(s) at a proximal end, the self-sealing slits seal around the medical device before opening at a distal end. The elongated valve is also affixed to at least some of the inner surface of the sheath. The valve will tear into halves along at least one of the self-sealing slits when the sheath is peeled.