David S Quinn

US Patent:

6461321, Oct 8, 2002

Filed:

May 11, 2001

Appl. No.:

09/853511

Inventors:

David G. Quinn - Grayslake IL

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M 300

US Classification:

604 43, 604 616, 604266

Abstract:

A hemodialysis catheter comprising a dual lumen tube with a bullet nose bolus at its distal end. A venous port is formed in one side of the bolus adjacent the bullet nose of the bolus. An arterial port is formed in the bolus circumferentially displaced 180Â around the catheter from the venous port. The bolus contains a venous passage which transitions from a smaller diameter D-shaped cross-section to a larger diameter circular cross-section. The bullet nose is thinner than the tube but is inclined on an angle to the axis of the tube so that a portion of its outer periphery is substantially tangent to a hypothetical cylinder containing the trailing edge of the venous port.

US Patent:

6517529, Feb 11, 2003

Filed:

Aug 30, 2000

Appl. No.:

09/651763

Inventors:

David G. Quinn - Grayslake IL

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M 2501

US Classification:

604528, 604 616, 604541

Abstract:

A hemodialysis catheter comprising a lumen tube with a bolus at its distal end. A main venous port is formed in one side of the bolus adjacent the bullet nose of the bolus. Second and third venous ports are formed in either the bolus or the tube. The second port is circumferentially displaced 180Â around the catheter from the main venous port. An arterial port is formed in either the bolus or the tube, in axial alignment with the main venous port and circumferentially displaced 180Â around the catheter from the second venous port.

US Patent:

6540714, Apr 1, 2003

Filed:

Aug 30, 2000

Appl. No.:

09/651455

Inventors:

David G. Quinn - Grayslake IL

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M 300

US Classification:

604 43, 604 616, 604524, 138177

Abstract:

A hemodialysis catheter including a catheter tube and a bolus tip, the bolus having a radially extending main side port. The catheter also has second and third side ports axially spaced from said main side port. The second and third side ports are each axially elongated, with an edge which is semi-circular in cross-section. The second side port is displaced 180Â from the main side port. The third side port is axially aligned with the main port. The catheter is thickened in an arch opposite each of the second and third side ports.

US Patent:

6702776, Mar 9, 2004

Filed:

Jan 11, 2001

Appl. No.:

09/759582

Inventors:

David G. Quinn - Grayslake IL

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M 300

US Classification:

604 43, 604 616, 604524, 138177

Abstract:

A catheter including a catheter tube and a bolus tip, the bolus having a radially extending main side port. In one embodiment the catheter also has second and third side ports axially spaced from said main side port. The second and third side ports are each axially elongated, with an edge which is semi-circular in cross-section. The second side port is displaced 180Â from the main side port. The third side port is axially aligned with the main port. The catheter is thickened in a dimple opposite each of the second and third side ports. Another catheter embodiment specifically for hemodialysis includes a dual lumen tube with a bolus at its distal end. A main venous port is formed in one side of the bolus adjacent the bullet nose of the bolus. Variations of this embodiment utilize a bolus with a 13. 5 French tube connector section and a 10 French nose section, with the venous port formed in the nose section.

US Patent:

6942653, Sep 13, 2005

Filed:

May 11, 2001

Appl. No.:

09/853916

Inventors:

David G. Quinn - Grayslake IL, US

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M025/00

US Classification:

604523

Abstract:

A blood vessel catheter including a catheter tube and a bolus having a bullet nose. The bolus includes a passage section with a side opening port. A nose section with a bullet nose has a smaller cross-section than the rest of the bolus and is offset from the axis of the passage section in the radial direction of the port. The bullet nose is rounded and unperforated.

US Patent:

7048722, May 23, 2006

Filed:

Nov 15, 2002

Appl. No.:

10/295097

Inventors:

David G. Quinn - Grayslake IL, US

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M 25/00

US Classification:

604270, 604523

Abstract:

An enteral feeding catheter that provides access to both the stomach and the jejunum for feeding, aspiration and decompression. The catheter includes a dual lumen “D” tube that joins to an external “Y” connector at the proximal end of the tube. The connector serves both lumens as a source for fluid or aspiration. The gastric lumen and the jejunal lumen of the “D” tube both connect to a transitional connector bolus in the stomach. The gastric lumen of the “D” tube joins with a lumen in the transitional bolus that communicates with a gastric port. The gastric port is recessed to the level of its full internal lumen, thereby providing maximum protection against occlusion and maximum area for outflow. The “D” jejunal lumen connects in the bolus with a lumen that transitions from a “D” shape to a full circle shape. The latter provides for the attachment of a smaller, round, single lumen tube that extends into the jejunum.

US Patent:

7419479, Sep 2, 2008

Filed:

Nov 13, 2003

Appl. No.:

10/529646

Inventors:

David G. Quinn - Grayslake IL, US

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M 25/00

US Classification:

604270, 604523

Abstract:

An enteral feeding catheter () that provides access to both the stomach and the jejunum for feeding, aspiration and decompression. The catheter includes a dual lumen “D” tube () that joins to an external “Y” connector () at the proximal end of the tube. The connector serves both lumens as a source for fluid or aspiration. The gastric lumen () and the jejunal lumen () of the “D” tube both connect to a transitional connector bolus in the stomach. The gastric lumen of the “D” tube joins with a lumen in the transitional bolus that communicates with a gastric port (). The gastric port is recessed to the level of its full internal lumen, thereby providing maximum protection against occlusion and maximum area for outflow. The “D” jejunal lumen connects in the bolus with a lumen that transitions from a “D” shape to a full circle shape. The latter provides for the attachment of a smaller, round, single lumen tube that extends into the jejunum.

US Patent:

7914497, Mar 29, 2011

Filed:

Jan 25, 2006

Appl. No.:

11/339660

Inventors:

David G. Quinn - Grayslake IL, US

Assignee:

Radius International Limited Partnership - Grayslake IL

International Classification:

A61M 29/00

US Classification:

604174, 604175, 604910

Abstract:

A catheter includes a catheter tube, internal and external retention bolsters and a retractable catheter tip. The retractable tip is in the form of a bolus which is extended to axial alignment with the tube for insertion. After insertion with a stylet or the like, removal of the stylet permits the tip to retract automatically and assume a position perpendicular to the axis with minimal protrusion into the corporeal space involved.