Derrick Lemont Johnson

US Patent:

7455689, Nov 25, 2008

Filed:

Aug 25, 2005

Appl. No.:

11/212373

Inventors:

Derrick Johnson - Orange CA, US

Assignee:

Edwards lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 218, 623 214

Abstract:

A prosthetic mitral heart valve having four separate flexible leaflets. The heart valve includes a support frame that may be non-circular, for example elliptical or “D-shaped”. The support frame may have an undulating outflow edge defined by four inflow cusps and four outflow commissures to which each of the flexible leaflets attaches. The support frame may comprise an undulating wireform and a surrounding stent defining a structure having four cantilevered posts projecting in the outflow direction to support the four leaflets. The heart valve is designed to be secured in the annulus and function as a standalone unit without papillary muscle connections to the leaflets. The four leaflets may be arranged in two opposed pairs, one pair being smaller than the other pair. The larger pair of leaflets may be identical, or differently sized. Existing sizes of heart valve leaflets may be utilized with the smaller leaflets being at least two leaflet sizes smaller than the larger leaflets in odd millimeter increments.

US Patent:

7682391, Mar 23, 2010

Filed:

Jul 13, 2005

Appl. No.:

11/181065

Inventors:

Derrick Johnson - Orange CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 241, 623 215

Abstract:

A prosthetic mitral heart valve including a contoured sewing ring that better matches the mitral valve annulus. The sewing ring includes an inflow end and an outflow end, the outflow and having at least one raised portion. There may be two raised portions located approximately 120 apart from each other and designed to register with two anterior trigones of the mitral valve annulus. The sewing ring may be formed by a suture-permeable annular member surrounded by a fabric covering, the annular member desirably being molded of silicone. The raised portion(s) may gently curve upward to a height of about 2 mm above the adjacent portions of the outflow end of the sewing ring. The sewing ring may also be constructed so as to be more flexible around a posterior aspect than around an anterior aspect to accommodate calcified tissue more commonly found around the posterior annulus. The contoured sewing ring can be combined with various types of heart valve including bioprosthetic and mechanical valves. A bioprosthetic heart valve of the present invention may include a support stent having three outflow commissures alternating with three inflow cusps, with two of the commissures being located at the same place as two raised portions of the sewing ring.

US Patent:

7776084, Aug 17, 2010

Filed:

Jul 13, 2005

Appl. No.:

11/181190

Inventors:

Derrick Johnson - Orange CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 219, 623 217, 623 241

Abstract:

A prosthetic mitral heart valve including a contoured sewing ring that better matches the mitral valve annulus. The sewing ring includes an inflow end and an outflow end, the outflow and having at least one raised portion. There may be two raised portions located approximately 120 apart from each other and designed to register with two anterior trigones of the mitral valve annulus. The sewing ring may be formed by a suture-permeable annular member surrounded by a fabric covering, the annular member desirably being molded of silicone. The raised portion(s) may gently curve upward to a height of about 2 mm above the adjacent portions of the outflow end of the sewing ring. The sewing ring may also be constructed so as to be more flexible around a posterior aspect than around an anterior aspect to accommodate calcified tissue more commonly found around the posterior annulus. The contoured sewing ring can be combined with various types of heart valve including bioprosthetic and mechanical valves. A bioprosthetic heart valve of the present invention may include a support stent having three outflow commissures alternating with three inflow cusps, with two of the commissures being located at the same place as two raised portions of the sewing ring.

US Patent:

8366769, Feb 5, 2013

Filed:

Mar 17, 2004

Appl. No.:

10/802314

Inventors:

Van Le Huynh - Irvine CA, US
Michael J. Scott - Lake Forest CA, US
Derrick Johnson - Orange CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 241

Abstract:

A sewing ring for prosthetic heart valves that is connected and configured to pivot outward. A biocompatible fabric covering surrounds at least a portion of the sewing ring, and the ring may be exclusively connected to a stent with the fabric. The sewing ring may be generally planar and of uniform thickness, or may be of varying thickness. The fabric may be used to encompass both the stent and the sewing ring, and may be a single piece. A seam may be provided in the fabric as a discrete pivoting line. The sewing ring may be convertible between bi-stable positions. The ring may extend outward in a frusto-conical shape so as to enable inversion between a position facing the inflow end of the valve and a position facing the outflow end of the valve. The sewing ring may have a compliant insert having a celled construction defined by outer walls and inner ribs. A method of implantation, and a method of assembly of the heart valve is also provided.

US Patent:

8506625, Aug 13, 2013

Filed:

Aug 9, 2010

Appl. No.:

12/852773

Inventors:

Derrick Johnson - Orange CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 241, 623 238, 623 24

Abstract:

A prosthetic mitral heart valve including a contoured sewing ring that better matches the mitral valve annulus. The sewing ring includes an inflow end and an outflow end, the outflow and having at least one raised portion. There may be two raised portions located approximately 120 apart from each other and designed to register with two anterior trigones of the mitral valve annulus. The sewing ring may be formed by a suture-permeable annular member surrounded by a fabric covering, the annular member desirably being molded of silicone. The raised portion(s) may gently curve upward to a height of about 2 mm above the adjacent portions of the outflow end of the sewing ring. The sewing ring may also be constructed so as to be more flexible around a posterior aspect than around an anterior aspect to accommodate calcified tissue more commonly found around the posterior annulus. The contoured sewing ring can be combined with various types of heart valve including bioprosthetic and mechanical valves. A bioprosthetic heart valve of the present invention may include a support stent having three outflow commissures alternating with three inflow cusps, with two of the commissures being located at the same place as two raised portions of the sewing ring.

US Patent:

20080262610, Oct 23, 2008

Filed:

Apr 20, 2007

Appl. No.:

11/738349

Inventors:

Alan Lang - Long Beach CA, US
Troy Miller - Rancho Santa Margarita CA, US
Ned Schneider - Aliso Viejo CA, US
Alexander Vatz - Lake Forest CA, US
Tonya Brooke Icenogle - Newport Beach CA, US
Sylvia Franz - Laguna Beach CA, US
Derrick Johnson - Orange CA, US

International Classification:

A61F 2/14

US Classification:

623 516

Abstract:

Provided herein are intracorneal inlays for correcting vision impairments by altering the shape of the anterior corneal surface. The physical design of the inlay to induce the desired change of the anterior corneal surface includes consideration of the biomechanical response of the corneal tissue to the physical shape of the inlay. This biomechanical response can differ depending on the thickness, diameter, and profile of the inlay. In one embodiment, inlays having diameters smaller than the pupil are provided for correcting presbyopia. To provide near vision, an inlay is implanted centrally in the cornea to induce an “effect” zone on the anterior corneal surface, within which diopter power is increased. Distance vision is provided by a region of the cornea peripheral to the “effect” zone. In another embodiment, small diameter inlays are provided that induce “effect” zones on the anterior corneal surface that are much larger in diameter than the inlays.

US Patent:

20090054973, Feb 26, 2009

Filed:

Oct 31, 2008

Appl. No.:

12/263379

Inventors:

Derrick Johnson - Orange CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 21, 623 238

Abstract:

A prosthetic mitral heart valve having four separate flexible leaflets. The heart valve includes a support frame that may be non-circular, for example elliptical or “D-shaped”. The support frame may have an undulating outflow edge defined by four inflow cusps and four outflow commissures to which each of the flexible leaflets attaches. The support frame may comprise an undulating wireform and a surrounding stent defining a structure having four cantilevered posts projecting in the outflow direction to support the four leaflets. The heart valve is designed to be secured in the annulus and function as a standalone unit without papillary muscle connections to the leaflets. The four leaflets may be arranged in two opposed pairs, one pair being smaller than the other pair. The larger pair of leaflets may be identical, or differently sized. Existing sizes of heart valve leaflets may be utilized with the smaller leaflets being at least two leaflet sizes smaller than the larger leaflets in odd millimeter increments.

US Patent:

20130184814, Jul 18, 2013

Filed:

Jan 23, 2013

Appl. No.:

13/748216

Inventors:

Edwards Lifesciences Corporation - Irvine CA, US
Michael J. Scott - Lake Forest CA, US
Derrick Johnson - Orange CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 236

Abstract:

A sewing ring for prosthetic heart valves that is connected and configured to pivot outward. A biocompatible fabric covering surrounds at least a portion of the sewing ring, and the ring may be exclusively connected to a stent with the fabric. The sewing ring may be generally planar and of uniform thickness, or may be of varying thickness. The fabric may be used to encompass both the stent and the sewing ring, and may be a single piece. A seam may be provided in the fabric as a discrete pivoting line. The sewing ring may be convertible between bi-stable positions. The ring may extend outward in a frusto-conical shape so as to enable inversion between a position facing the inflow end of the valve and a position facing the outflow end of the valve. A method of implantation, and a method of assembly of the heart valve is also provided.