Andrew K Hoffa

US Patent:

7036510, May 2, 2006

Filed:

Apr 28, 2004

Appl. No.:

10/833872

Inventors:

Michael A. Zgoda - Lexington KY, US
Andrew K. Hoffa - Bloomington IN, US
Laura Rice - Westfield IN, US

Assignee:

Cook Critical Care Incorporated - Bloomington IN

International Classification:

A61M 16/00
A61M 29/00

US Classification:

12820729, 12820714, 604 6901

Abstract:

An apparatus and method for performing a percutaneous tracheostomy procedure utilizing dilatation means that do not require entry into the trachea by downward pressure, in order to minimize the risk of posterior tracheal trauma. In addition, the apparatus is structured to facilitate entry of the tracheostomy tube into the dilated entry site without permitting any significant shrinkage or reduction in diameter of the dilated opening.

US Patent:

7128759, Oct 31, 2006

Filed:

May 19, 2004

Appl. No.:

10/849639

Inventors:

Thomas A. Osborne - Bloomington IN, US
Brian C. Case - Bloomington IN, US
Jacob A. Flagle - Bloomington IN, US
Andrew K. Hoffa - Bloomington IN, US
Michael L. Garrison - Indianapolis IN, US

Assignee:

Cook Incorporated - Bloomington IN

International Classification:

A61F 2/06

US Classification:

623 124

Abstract:

Medical devices for implantation in a body vessel are provided. A medical device according to the invention comprises a support structure and one or more graft members comprising a valve portion and a constraining portion. The support structure has a first, unexpanded configuration and a second, expanded configuration. The constraining portion is adapted to substantially prevent the support structure from achieving the second, expanded configuration. The valve portion is adapted to permit fluid flow through a body vessel in a first direction and substantially prevent fluid flow through the vessel in a second, opposite direction.

US Patent:

7452371, Nov 18, 2008

Filed:

Feb 5, 2001

Appl. No.:

09/777091

Inventors:

Dusan Pavcnik - Portland OR, US
Frederick S. Keller - Portland OR, US
Josef Rosch - Portland OR, US
Thomas A. Osborne - Bloomington IN, US
Brian L. Bates - Bloomington IN, US
Christopher G. Dixon - Bloomington IN, US
Andrew K. Hoffa - Bloomington IN, US
Joseph F. Obermiller - Bloomington IN, US
John A. DeFord - Cleveland OH, US
Joseph W. Roberts - St. Paul MN, US

Assignee:

Cook Incorporated - Bloomington IN
Oregon Health & Science University - Portland OR
Cook Biotech, Inc. - West Lafayette IN

International Classification:

A61F 2/06
A61F 2/24

US Classification:

623 124, 623 212, 623 214, 623 217

Abstract:

A multiple-sided medical device comprises a frame comprising wire or other resilient material and having a series of bends and interconnecting sides. The device has both a flat configuration and a second, folded configuration which a generally serpentine shape. The device is pushed from a delivery catheter into the lumen of a duct or vessel and may include one or more barbs for anchoring purposes. A full or partial covering of fabric or other flexible material such as DACRON, PTFE, or a collagen-based material such as small intestinal submucosa (SIS), may be sutured or attached to the frame to form an occlusion device, a stent graft, or an implantable, intraluminal valve such as for correcting incompetent veins in the lower legs and feet.

US Patent:

7520894, Apr 21, 2009

Filed:

Jun 22, 2005

Appl. No.:

11/165600

Inventors:

Dusan Pavcnik - Portland OR, US
Frederick S. Keller - Portland OR, US
Josef Rosch - Portland OR, US
Thomas A. Osborne - Bloomington IN, US
Brian L. Bates - Bloomington IN, US
Christopher G. Dixon - Bloomington IN, US
Andrew K. Hoffa - Bloomington IN, US
Joseph F. Obermiller - Bloomington IN, US
John A. DeFord - Cleveland OH, US
Joseph W. Roberts - St. Paul MN, US

Assignee:

Cook Incorporated - Bloomington IN
Cook Biotech Incorporated - West Lafayette IN
Oregon Health & Science University - Portland OR

International Classification:

A61F 2/24
A61F 2/06

US Classification:

623 126, 623 212

Abstract:

A multiple-sided medical device comprises a frame comprising wire or other resilient material and having a series of bends and interconnecting sides. The device has both a flat configuration and a second, folded configuration which a generally serpentine shape. The device is pushed from a delivery catheter into the lumen of a duct or vessel and may include one or more barbs for anchoring purposes. A full or partial covering of fabric or other flexible material such as DACRON, PTFE, or a collagen-based material such as small intestinal submucosa (SIS), may be sutured or attached to the frame using heat or pressure welding crimping, adhesive, or other techniques to form an occlusion device, a stent graft, or an implantable, intraluminal valve such as for correcting incompetent veins in the lower legs and feet.

US Patent:

7604618, Oct 20, 2009

Filed:

Jun 23, 2005

Appl. No.:

11/166915

Inventors:

Christopher G. Dixon - Bloomington IN, US
Jacob A. Flagle - Indianapolis IN, US
Andrew K. Hoffa - Bloomington IN, US
Joseph P. Lane - Methuen MA, US

Assignee:

Cook Incorporated - Bloomington IN
Sabin Corporation - Bloomington IN

International Classification:

A61M 5/315

US Classification:

604222, 604122

Abstract:

A pressure injection syringe with an actuator that includes a plunger for pressurizing viscous fluid material within a chamber. The plunger distal tip includes a high pressure seal defined by a seal member within a seal seat. The high pressure seal is viscoselective to permit air passage therepast for aspiration, and to prohibit viscous material passage therepast during actuation of the actuator wherein high pressure is applied to the material within the chamber. The viscoselective seal may be defined for example by small axial openings in the seal seat that permit aspiration of air therepast during initial plunger insertion into the chamber, but fluid escape is prohibited by the seal member when the seal member is pressed firmly against a collar of the plunger proximally adjacent the seal seat by initial engagement of the seal member with the viscous material, thus completely sealing the chamber at the proximal end thereof.

US Patent:

7604661, Oct 20, 2009

Filed:

Oct 31, 2007

Appl. No.:

11/931182

Inventors:

Dusan Pavcnik - Portland OR, US
Thomas A. Osborne - Bloomington IN, US
Brian C. Case - Lake Villa IL, US
Jacob A. Flagle - Indianapolis IN, US
Michael L. Garrison - Indianapolis IN, US
Andrew K. Hoffa - Bloomington IN, US
Darin G. Schaeffer - Bloomington IN, US
Richard B. Sisken - West Lafayette IN, US

Assignee:

Cook Incorporated - Bloomington IN
William Cook Europe ApS - Bjaeverskov
MED Institute - West Lafayette IN
Oregon Health Sciences University - Portland IN

International Classification:

A61F 2/06
A61F 2/24

US Classification:

623 124, 623 214, 623 217

Abstract:

An valve prosthesis, such as an artificial venous valve, having a support frame and leaf structure comprising one or more leaflets in which the outer edge of each leaflet engages the inner circumference of the bodily passageway along a serpentine path urged against the passageway by an expandable frame, while the inner edges move in response to fluid to restrict retrograde flow. Optionally, one or more elements can extend from the support frame/leaf structure to provide centering support and/or protection from the leaflet adhering to the vessel wall. In one embodiment, the centering support structure comprises a second or third expandable frames attached to and extending from the proximal and/or distal ends of main valve structure and support frame. In another embodiment, one or more support elements extend outward from the valve support frame to engage the vessel wall to provide greater longitudinal stability.

US Patent:

7618447, Nov 17, 2009

Filed:

Aug 30, 2004

Appl. No.:

10/828716

Inventors:

Brian C. Case - Bloomington IN, US
Jacob A. Flagle - Bloomington IN, US
Andrew K. Hoffa - Bloomington IN, US
Darin G. Schaeffer - Bloomington IN, US
Michael L. Garrison - Indianapolis IN, US

Assignee:

Cook Incorporated - Bloomington IN

International Classification:

A61F 2/06
A61F 2/24

US Classification:

623 126, 623 124, 623 214, 623 218

Abstract:

An expandable venous valve having a support structure that configured to enlarge the area adjacent to the valve structure such that the flow patterns of retrograde flow are modified in a way that facilitates the flushing of the pockets at the base of the valve area to prevent stagnation of bodily fluid, which in the venous system, can lead to thrombus formation. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame section or the support frame can comprise an expanded-diameter intermediate or proximal section that forms an artificial sinus adjacent the valve structure. In another group of embodiments, the attachment pathway between opposing leaflets and the support frame and/or vessel wall comprises a proximal portion that places the leaflets in extended contact with one another and a distal portion forms a large angle with respect to the adjacent walls such that a large pocket is created at the base of the leaflets. In one embodiment, the attachment pathway extends distally along a pair of substantially parallel longitudinal attachment struts to create an extended leaflet contact area, then angles circumferentially and distally from the former along distal attachment struts to define the bottom edge of the leaflets.

US Patent:

7628803, Dec 8, 2009

Filed:

Aug 15, 2003

Appl. No.:

10/642372

Inventors:

Dusan Pavcnik - Portland OR, US
Thomas A. Osborne - Bloomington IN, US
Brian C. Case - Bloomington IN, US
Jacob A. Flagle - Bloomington IN, US
Michael L. Garrison - Bloomington IN, US
Andrew K. Hoffa - Bloomington IN, US
Darin G. Schaeffer - Bloomington IN, US
Richard B. Sisken - West Lafayette IN, US

Assignee:

Cook Incorporated - Bloomington IN
Oregon Health Science University - Portland OR

International Classification:

A61F 2/06
A61F 2/24

US Classification:

623 124, 623 214, 623 216

Abstract:

An valve prosthesis, such as an artificial venous valve, having a support frame and leaf structure comprising one or more leaflets in which the outer edge of each leaflet engages the inner circumference of the bodily passageway along a serpentine path urged against the passageway by an expandable frame, while the inner edges move in response to fluid to restrict retrograde flow. Optionally, one or more elements can extend from the support frame/leaf structure to provide centering support and/or protection from the leaflet adhering to the vessel wall. In one embodiment, the centering support structure comprises a second or third expandable frames attached to and extending from the proximal and/or distal ends of main valve structure and support frame. In another embodiment, one or more support elements extend outward from the valve support frame to engage the vessel wall to provide greater longitudinal stability.