Patents by Inventor David B. DeWindt
David B. DeWindt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8257323Abstract: Embodiments of the invention provide a cannula having a body with a first outer diameter, a proximal end, a distal end, a lumen extending between the proximal and distal ends, and a portion outward of the first outer diameter having a second outer diameter greater than the first outer diameter that is adapted to space tissue from the fluid inlet to maintain fluid flow. Such a cannula is particularly useful for cardiopulmonary bypass procedures using a kinetically assisted venous drainage system.Type: GrantFiled: August 3, 2005Date of Patent: September 4, 2012Assignee: Medtronic, Inc.Inventors: Katherine Rose Joseph, David B. DeWindt, Rebecca L. Engel, Donald R. Sandmore, David E. Weston, John Mrachek
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Patent number: 8167867Abstract: 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.Type: GrantFiled: August 16, 2007Date of Patent: May 1, 2012Assignee: Medtronic, Inc.Inventors: Roderick E. Briscoe, Paul F. Rom, Karyl L. Stapert, David B. DeWindt, Ronald A. Devries, Steven R Gundry, William F Sidor
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Patent number: 7276055Abstract: 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.Type: GrantFiled: April 3, 2003Date of Patent: October 2, 2007Assignee: Medtronic, Inc.Inventors: David B. DeWindt, Ronald A. Devries, Steven R. Gundry, William E. Sidor
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Patent number: 6645194Abstract: 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.Type: GrantFiled: December 21, 2001Date of Patent: November 11, 2003Assignee: Medtronic, Inc.Inventors: Roderick E. Briscoe, Paul F. Rom, Karyl L. Stapert, David B. DeWindt, Ronald A. Devries, Steven R. Gundry, William E. Sidor
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Publication number: 20030191447Abstract: 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.Type: ApplicationFiled: April 3, 2003Publication date: October 9, 2003Applicant: Medtronic, Inc.Inventors: David B. DeWindt, Ronald A. Devries, Steven R. Gundry, William E. Sidor
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Patent number: 6447484Abstract: 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.Type: GrantFiled: January 23, 1998Date of Patent: September 10, 2002Assignee: Medtronic, Inc.Inventors: Roderick E. Briscoe, Paul F. Rom, Karyl L. Stapert, David B. DeWindt, Ronald A. Devries, Steven R. Gundry, William F. Sidor
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Publication number: 20020045862Abstract: 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.Type: ApplicationFiled: December 21, 2001Publication date: April 18, 2002Applicant: Medtronic, Inc.Inventors: Roderick E. Briscoe, Paul F. Rom, Karyl L. Stapert, David B. DeWindt, Ronald A. Devries, Steven R. Gundry, William E. Sidor
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Patent number: 6146371Abstract: 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.Type: GrantFiled: August 10, 1998Date of Patent: November 14, 2000Assignee: Medtronic, Inc.Inventors: David B. DeWindt, Ronald A. DeVries, Steven M. Gundry, William E. Sidor
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Patent number: 5817071Abstract: 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.Type: GrantFiled: January 9, 1997Date of Patent: October 6, 1998Assignee: Medtronic, Inc.Inventors: David B. Dewindt, Ronald A. Devries, Steven M. Gundry, William E. Sidor