John T Nash

US Patent:

6350280, Feb 26, 2002

Filed:

Feb 3, 2000

Appl. No.:

09/497274

Inventors:

John E. Nash - Chester Springs PA
Douglas G. Evans - Downington PA
David M. Hoganson - West Chester PA

Assignee:

Kensey Nash Corporation - Exton PA

International Classification:

A61F 200

US Classification:

623 136, 606153

Abstract:

A system and method of use for effecting the bypass or other anastomosis of a portion of a native blood vessel, duct, lumen or other tubular organ within the body of a living being. The system includes a connector assembly and a deployment instrument for carrying the device to the desired position within the vessel, duct, lumen or tubular organ. The system includes a piercer-dilator instrument to form an opening in the wall of the vessel, duct, lumen or tubular organ into which the connector assembly is deployed by the deployment instrument. The connector assembly is at least partially formed of a resorbable material and includes movable members for securing it to the tissue of the vessel, duct, lumen or tubular organ contiguous with the opening. Other components may be included in the device for expediting the anastomosis procedure, with or without the use of sutures.

US Patent:

6402767, Jun 11, 2002

Filed:

Mar 6, 2000

Appl. No.:

09/519191

Inventors:

John E. Nash - Chester Springs PA
Douglas G. Evans - Downingtown PA

Assignee:

Kensey Nash Corporation - Exton PA

International Classification:

A61B 1704

US Classification:

606153

Abstract:

A system and method of use for effecting the bypass or other anastomosis of a portion of a native blood vessel, duct, lumen or other tubular organ within the body of a living being. The system includes an anastomosis connector device and a deployment instrument for carrying the device to the desired position within the vessel, duct, lumen or tubular organ. The deployment device may include a dilator to facilitate the placement of the anastomosis device within the interior of the vessel, duct, lumen or other tubular organ. The anastomosis device is preferably formed of a resorbable material and is configured to minimize blood or other fluid turbulence therethrough. The device may include snap-connectors or other components for securing it to the tissue of the vessel, duct, lumen or tubular organ and hemostasis-inducing sealing rings to prevent blood leakage. Other components may be included in the device for expediting the anastomosis procedure, with or without the use of sutures.

US Patent:

6428488, Aug 6, 2002

Filed:

Jul 12, 2000

Appl. No.:

09/615340

Inventors:

Kenneth Kensey - Malvern PA 19355
William N. Hogenauer - Gilbertsville PA 19525
John E. Nash - Chester Springs PA 19425
Harold E. Clupper - West Chester PA 19382
Sangho Kim - Philadelphia PA 19104
Young Cho - Cherry Hill NJ 08003
Peter Randolph Hazard Stark - Andover MA 01810
Robert O. Pellizzari - Groton MA 01450
Sergey Kruss - Millis MA 02054

International Classification:

A61B 500

US Classification:

600573, 73 173, 73 54

Abstract:

An apparatus and method for measuring the viscosity of Newtonian and non-Newtonian fluids over a range of shear rates, especially low shear rates, by monitoring two rising columns of fluid (Newtonian or non-Newtonian) that pass through respective capillaries having different lengths. Furthermore, a specialized column monitor is provided that uses multiple interrogation sources (e. g. , lasers) and a single detector (e. g. , a charge-coupled device (CCD) array) to continuously monitor both columns of fluid substantially simultaneously. In particular, the system includes a Y-connector to form two flow paths and wherein each flow path includes a tube that includes a riser tube, a capillary tube of predetermined dimensions and a valve in each for controlling the fluid flow in each path. The specialized column monitor monitors the movement of the fluid columns in each of the riser tubes and an associated microprocessor analyzes these movements, along with the predetermined dimensions of the capillary tubes and riser tubes to determine the viscosity of the fluid.

US Patent:

6443911, Sep 3, 2002

Filed:

Jul 31, 2000

Appl. No.:

09/629216

Inventors:

Kenneth Kensey - Chester Springs PA
John E. Nash - Chester Springs PA

Assignee:

Visco Technologies, Inc. - Exton PA

International Classification:

A61B 500

US Classification:

600573

Abstract:

A blood viscosity measuring system and method that monitors the rising head of a column of fluid representing a living beings blood in-vivo to determine the blood viscosity over a range of shears. The system includes a capillary tube, at least a portion of which is located within the vascular system of the being, and a riser tube, having a liquid therein coupled to the capillary tube. A sensor and associated microprocessor are provided to determine the change in the height of the liquid in the riser tube at plural points along the length of the tube from which the viscosity is calculated.

US Patent:

6514271, Feb 4, 2003

Filed:

Feb 1, 2001

Appl. No.:

09/773855

Inventors:

Douglas G. Evans - Downingtown PA
John E. Nash - Chester Springs PA

Assignee:

Kensey Nash Corporation - Exton PA

International Classification:

A61B 1734

US Classification:

606185, 606220

Abstract:

A transmyocardial revascularization system including a plurality of inserts formed of a material to elicit a healing response in tissue of the myocardium and deployment instruments and associated components for deploying the inserts into the wall of the myocardium. The inserts are arranged to be disposed within respective lumens or channels in the wall of the myocardium. The inserts can take various forms, e. g. , be solid members, tubular members, or porous members, and may be resorbable, partially resorbable or non-resorbable. In some embodiments the inserts are arranged to be left in place within the channels in the wall of the myocardium to result in plural lumens which enable blood to flow therethrough and into contiguous capillaries. The deployment instruments are arranged to pierce the tissue of the myocardium from either the endocardium or the epicardium to insert the inserts into the myocardium, depending on the particular deployment instrument used. The deployment instruments may make use of a stabilizing device to stabilize them during the procedure of inserting the inserts into the myocardium.

US Patent:

6517518, Feb 11, 2003

Filed:

May 21, 2001

Appl. No.:

09/861728

Inventors:

John E. Nash - Chester Springs PA
Gregory Walters - Malvern PA
Douglas G. Evans - Downingtown PA
David Szabo - Trappe PA
Michael Paris - Hatfield PA

Assignee:

Kensey Nash Corporation - Exton PA

International Classification:

A61M 5178

US Classification:

60416402, 604158

Abstract:

An attachment tool to facilitate the attachment of a catheter or similar elongated instrument to a guide-wire or other elongated guide member, without requiring access to either end of said wire or member. Said tool providing repeatable and reliable alignment of components to be attached, while being operated with a single hand. The tool further facilitates the attachment of a plurality of catheters or instruments to a single wire or member.

US Patent:

6524323, Feb 25, 2003

Filed:

Jun 14, 2000

Appl. No.:

09/594131

Inventors:

John E. Nash - Chester Springs PA
William T. Fisher - Schwenksville PA

Assignee:

Kensey Nash Corporation - Exton PA

International Classification:

A61B 1722

US Classification:

606159, 606198

Abstract:

A system and method for opening a lumen in an occluded blood vessel, e. g. , a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e. g. , a rotary impacting impeller, and a debris extraction sub-system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e. g. , impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the beings body. The introduction of the infusate liquid may also be used to establish an unbalanced flow adjacent the working head to enable the atherectomy catheter to be steered hydrodynamically. A guide wire having an inflatable balloon on its distal end may be used with the atherectomy catheter to block the flow of debris distally, while enabling distal tissues to be perfused with an oxygenating liquid.

US Patent:

6569147, May 27, 2003

Filed:

Sep 22, 2000

Appl. No.:

09/667744

Inventors:

Douglas G. Evans - Downingtown PA
John E. Nash - Chester Springs PA

Assignee:

Kensey Nash Corporation - Exton PA

International Classification:

A61M 3100

US Classification:

604509, 606200

Abstract:

A system and method for opening a lumen in an occluded blood vessel, e. g. , a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e. g. , a rotary impacting impeller, and a debris extraction sub-system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e. g. , impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the beings body. A guide wire having an inflatable balloon on its distal end may be used with the atherectomy catheter to block the flow of debris distally, while enabling distal tissues to be perfused with an oxygenating liquid.