Ronald H Devries

US Patent:

6447484, Sep 10, 2002

Filed:

Jan 23, 1998

Appl. No.:

09/012520

Inventors:

Roderick E. Briscoe - Rockford MI
Paul F. Rom - Kentwood MI
Karyl L. Stapert - Grand Rapids MI
David B. DeWindt - Grand Rapids MI
Ronald A. Devries - Zeeland MI
Steven R. Gundry - Redlands CA
William F. Sidor - Rockford MI

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61M 5178

US Classification:

60416402, 604 9601, 604264, 60416701

Abstract:

An obturator for a cannula includes an elongate member and a flexible disc. The cannula has proximal and distal ends and a lumen extending therebetween. The distal end of the cannula has a circular cross-section. The cannula also includes a first portion having a non-circular cross-section and at least one fluid aperture formed adjacent the distal end. The flexible disc of the obturator is coupled to a distal end of the elongate member, both of which are adapted to be telescopically received in the lumen of the cannula. The flexible disc is configured to restrict the flow of fluid, entering the at least one fluid aperture, through the lumen.

US Patent:

6645194, Nov 11, 2003

Filed:

Dec 21, 2001

Appl. No.:

10/026234

Inventors:

Roderick E. Briscoe - Rockford MI
Paul F. Rom - Kentwood MI
Karyl L. Stapert - Grand Rapids MI
David B. DeWindt - Grand Rapids MI
Ronald A. Devries - Zeeland MI
Steven R. Gundry - Redlands CA
William E. Sidor - Rockford MI

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61M 3100

US Classification:

604506, 604508

Abstract:

An obturator for a cannula includes an elongate member and a flexible disc. The cannula has proximal and distal ends and a lumen extending therebetween. The distal end of the cannula has a circular cross-section. The cannula also includes a first portion having a non-circular cross-section and at least one fluid aperture formed adjacent the distal end. The flexible disc of the obturator is coupled to a distal end of the elongate member, both of which are adapted to be telescopically received in the lumen of the cannula. The flexible disc is configured to restrict the flow of fluid, entering the at least one fluid aperture, through the lumen.

US Patent:

7276055, Oct 2, 2007

Filed:

Apr 3, 2003

Appl. No.:

10/407094

Inventors:

David B. DeWindt - Grand Rapids MI, US
Ronald A. Devries - Zeeland MI, US
Steven R. Gundry - Redlands CA, US
William E. Sidor - Rockford MI, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61M 31/00

US Classification:

604506, 604206, 604264

Abstract:

A method of performing minimally invasive cardiac surgery includes the step of creating an access aperture into a patient's chest cavity, the access aperture being considerably smaller than a traditional cardiac surgery incision. A cannula is provided that has an oval portion with a longer major axis and a shorter minor axis and the cannula is inserted into the chest cavity through the access aperture.

US Patent:

8167867, May 1, 2012

Filed:

Aug 16, 2007

Appl. No.:

11/893393

Inventors:

Roderick E. Briscoe - Rockford MI, US
Paul F. Rom - Kentwood MI, US
Karyl L. Stapert - Grand Rapids MI, US
David B. DeWindt - Grand Rapids MI, US
Ronald A. Devries - Zeeland MI, US
Steven R Gundry - Redlands CA, US
William F Sidor - Rockford MI, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61M 25/00

US Classification:

604526, 604275

Abstract:

A method of performing minimally invasive cardiac surgery includes the step of creating an access aperture into a patient's chest cavity, the access aperture being considerably smaller than a traditional cardiac surgery incision. A cannula is provided that has an oval portion with a longer major axis and a shorter minor axis and the cannula is inserted into the chest cavity through the access aperture.

US Patent:

20070083161, Apr 12, 2007

Filed:

Sep 1, 2006

Appl. No.:

11/469736

Inventors:

Roderick Briscoe - Rockford MI, US
Paul Rom - Kentwood MI, US
Karyl Stapert - Grand Rapids MI, US
David DeWindt - Grand Rapids MI, US
Ronald Devries - Zeeland MI, US
Steven Gundry - Redlands CA, US
William Sidor - Rockford MI, US

International Classification:

A61M 5/178

US Classification:

604164020, 604164110, 604093010

Abstract:

A method of performing minimally invasive cardiac surgery includes the step of creating an access aperture into a patient's chest cavity, the access aperture being considerably smaller than a traditional cardiac surgery incision. A cannula is provided that has an oval portion with a longer major axis and a shorter minor axis and the cannula is inserted into the chest cavity through the access aperture.

US Patent:

6146371, Nov 14, 2000

Filed:

Aug 10, 1998

Appl. No.:

9/131579

Inventors:

David B. DeWindt - Grand Rapids MI
Ronald A. DeVries - Zeeland MI
Steven M. Gundry - Redlands CA
William E. Sidor - Rockford MI

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61M 3100

US Classification:

604506

Abstract:

A cannula comprises a proximal end, a distal end, and a lumen extending between the proximal and distal ends, wherein at least a portion of the cannula body is non-circular in cross section, preferably oval. A cannula wherein a portion of the cannula body is oval in cross section is ideally suited in surgical procedures wherein the cannula extends through a percutaneous aperture. The oval portion of the cannula body utilizes the space of the percutaneous aperture efficiently, thereby minimizing the necessary size of the access aperture.

US Patent:

48468045, Jul 11, 1989

Filed:

Mar 24, 1988

Appl. No.:

7/172477

Inventors:

Richard E. Davis - Wyoming MI
Ronald A. DeVries - Zeeland MI

Assignee:

DLP Inc. - Grand Rapids MI

International Classification:

A61M 500

US Classification:

604164

Abstract:

A combined percutaneous needle, stylet and needle guard. The guard has a friction fit with the distal end of the needle and stylet to retain the guard. When in use, the guard is transferred to the hub end of the needle to interfit with a proximal end of the needle and serve as a guide for a guidewire to be projected through the needle.

US Patent:

50820257, Jan 21, 1992

Filed:

Nov 23, 1990

Appl. No.:

7/617167

Inventors:

James H. DeVries - Grand Rapids MI
Michael R. DeVries - Grand Rapids MI
William E. Sidor - Rockford MI
Ronald A. DeVries - Zeeland MI
Stuart J. Marcadis - Wyoming MI

Assignee:

DLP, Inc. - Grand Rapids MI

International Classification:

F16K 702

US Classification:

137863

Abstract:

An apparatus and system for administering cardioplegic solution to a heart during open heart surgery. A source of solution is delivered to a control switch from a single tube source and the tube is divided at a "Y" connector into two tubes, one for antegrade delivery and one for retrograde delivery. The control switch has a prime position with both divided tubes open. Movement from prime position to an operative position is irreversible. In the operative position, there is an "off" position with both tubes closed, an antegrade position with the antegrade tube open and the retrograde tube closed, and a retrograde position with the retrograde tube open and the antegrade tube closed. Movement from one position to the other requires movement through the "off" position so there can be no cross-flow from antegrade to retrograde. Pressure monitoring tubes are incorporated into the switch to be opened and closed with the respective tubes.