CA1176802A - Heart valve protector - Google Patents
Heart valve protectorInfo
- Publication number
- CA1176802A CA1176802A CA000408100A CA408100A CA1176802A CA 1176802 A CA1176802 A CA 1176802A CA 000408100 A CA000408100 A CA 000408100A CA 408100 A CA408100 A CA 408100A CA 1176802 A CA1176802 A CA 1176802A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- band
- strip
- suture
- protective band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2409—Support rings therefor, e.g. for connecting valves to tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/0095—Packages or dispensers for prostheses or other implants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0059—Additional features; Implant or prostheses properties not otherwise provided for temporary
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S623/00—Prosthesis, i.e. artificial body members, parts thereof, or aids and accessories therefor
- Y10S623/90—Stent for heart valve
Abstract
HEART VALVE PROTECTOR
ABSTRACT
A plastic band is secured around the outside of a prosthetic heart valve adjacent the sewing cushion to protect the valve leaflet material against inadvertent needle punctures and tears while sutures are being placed through the sewing cushion. The band is held in place by a single retention suture which passes through the band and sewing cushion of the valve and extends across the valve orifice. The protector is especially desirable for use with pericardial tissue valves having the tissue mounted on the outside of the valve stent where the tissue is particularly exposed and susceptible to needle damage.
ABSTRACT
A plastic band is secured around the outside of a prosthetic heart valve adjacent the sewing cushion to protect the valve leaflet material against inadvertent needle punctures and tears while sutures are being placed through the sewing cushion. The band is held in place by a single retention suture which passes through the band and sewing cushion of the valve and extends across the valve orifice. The protector is especially desirable for use with pericardial tissue valves having the tissue mounted on the outside of the valve stent where the tissue is particularly exposed and susceptible to needle damage.
Description
( ~76~30Z
~EART VALVE PROTECTOR
-BACKGROUND OF INVENTION
Field of the Invention This invention relates to prosthetic heart valves and, more particularly, to an apparatus and method for protect-ing valve cusp material against inadvertent needle punc-ture or tear during the implantation of the valve in thepatient.
Description of Prior Art Prosthetic tissue heart valves constructed of autologous or hemologous fascia lata, dura matter or heterologous pericardium are described in U. S. Patent Nos. 4,084,268 and 4,172,295. Typically, such valves are constructed by securing the tissue around the outside of a valve stent or framework having a circular base at one end and three axially-extending commissure posts interconnected by valleys at the other end. The tissue is supported at three points by the stent posts while the tissue interme-diate the stent posts extends through the valleys and into the center of the stent to form three valve cusps.
The valve stent also includes a sewing cushion around the circular base portion as illustrated in the above-re~erenced patents. The sewing cushion provides a means - 30 for attaching the valve to the patient by suturing through the sewing cushion. In one method of implanting the valve, a plurality of sutures are placed through the sewing cushion and the mounting site in the patient using an interrupted mattress stitch while holding the valve several inches away from the mounting site. When all the ~768~Z
sutures are in place, the valve is guided down the suture lines into the mounting position and the sutures are tied off.
In the case of valves constructed of pericardium or other natural tissues, the tissue is positioned outside the stent as illustrated in the above-referenced patents. The tissue is thusly exposed and subject to needle damage as the mounting sutures are placed through the sewing ring.
Since the operating area is cramped and vision may be limited, especially in the case of mitral valve replace-ment where the cusps of the valve are directed away from the surgeon and shielded from view by the sewing ring, great care must be taken when passing the mounting sutures through the sewing ring to avoid accidentally piercing or tearing the valve tissue. Because of the delicate nature of the tissue, a single needle hole can seriously compro-mise the long-term performance and durability of the valve.
It is accordingly an object of the present invention to provide a method and device for protecting the cusp material of a prosthetic heart valve against needle damage during the installation procedure. It is a further object ~5 of the present invention to provide a protective device which is easily removed from the heart valve after all the mounting sutures are in place. These and other objects of the present invention will be apparent from the ensuing description and claims.
Summary of the Invention Pericardial and other prosthetic tissue heart valves susceptible to needle damage during installation are protected from such damage by uroviding a protective band to surround and cover the valve tissue VC~ ~^5 ~768(~;~
immediately adjacent the sewing cushion. The protector may consist of a strip of plastic material which is formed into a cylinder and secured to the valve by a single retention suture. The suture is attached to the protec-S tive band at each end and at one or more points betweenthe ends, traversing the valve by passing through the sewing ring and across the valve orifice.
The retention suture traversing the orifice of the valve 0 i5 highly visible and assures that the valve will not be inadvertently be installed with the protector in place.
Once all the mounting sutures have been positioned through the sewing ring, the protector is removed by cutting the retention suture in the area of the valve orifice and pulling it free of the valve and pro-ective band. Once the retention suture has been removed, the protector is readily withdrawn from between the mounting sutures.
To facilitate suturing through the protector, the plastic strip is provided with a plurality of dimples and/or channels having a thin base-thickness at its ends and midpoint. ~ultiple rows of dimples or channels across the width of the strip are provided at either end to permit the length of the strip to be adjusted to the circumfer-ence of the valve by cutting off excess strip material.
Description of Drawings Figure 1 is a plan view of a protective band.
30Figure 2 is a cross-sectional view of the protective band through line 2-2 of Figure 1.
Figure 3 is a cross-sectional view of the protective band through line 3-3 of Figure 1.
VC~-5 1~7~8~Z
Figure 4 is a view in perspective of a mitral valve with the protective band in position.
Figure 5 is a partial view showing the suture placement at a point between the ends of the protective band.
Figure 6 is a partial view showing the suture placement at the ends of the protective band.
Description Referring now to Figure 1 there is i~lustrated at 10 a side plan view of a protective band of the present invention comprising a strip of plastic sheet material, suitably polypropylene, having a length corresponding to the ou~side circul~ference of the prosthetic tissue heart valve. The width of the strip is preferably at least about 0.25 inches, and the thickness is about 0.02 inches.
On one side at each end of the band are located suture guide means in the form of a double row of circular depressions 11 centrally disposed about the major axis of said strip and extending inward from the ends in a spaced relationship over a distance of at least about 0.5 inches.
Between the ends of the band and aligned with one row of circular depressions are elongated depressions 12 which are preferably about 0.25 inches long. Each depression has a base thickness of less than about 0.01 inches as illustrated in Figures 2 and 3 which are cross-sectional views at lines 2-2 and 3-3 respectively of Figure 1.
The protective band is affixed to the heart valve as illustrated in Figure 4 which is a view in perspective of a mitral heart valve with the protective band in place.
Referring to Figure 4, retention suture 20 passes through both ends of the protective band and through the sewing vcRr ."S
~1768(~Z
ring 16 of the valve and across the valve orifice. The intermediate portion of the band, hidden from view in Figure 4, is secured at two points by the suture as illustrated in Figure 5, the suture passing through the thin-base portion of elongated depressions 12 and thence returning through the sewing cushion. At the ends of the protective band, the suture passes through the outer most circular depressions in a figure X as illustrated in Figure 6. The suture is always placed through the outermost row of depressions at the end of the protective band, and multiple depressions are provided to enable the band to be shortened if necessary to fit smaller size valves by cutting off appropriate end sections at one or both ends of the protective strip.
The circular and elongated depressions in the band facili-tate the suture attachment of the band to the valve since the thin areas in the base of the depressions are easily pierced by a surgical needle.
The preferred material for band construction is polypro-pylene which is soft and flexible, easily molded and easily stitched. Other suitable materials include poly-ethylene, nylon, polyvinylchloride and other nontoxic polymeric compositions which possess the desirable combination of physical properties.
The protective band is intended primarily for use on heart valves constructed of natural or synthetic sheet materials such as pericardium, fascia lata, dura matter or polyur-ethane, and where the construction of the valve places the sheet material on the outside of the valve stent where it is particularly exposed and susceptible to needle damage.
The band may, of course, also be used in conjunction with porcine heart valve~ where, although the valve tissue is contained within th~ confines of the stent, the needles of VCR-~
-6- 1~768~Z
the mounting sutures may catch in the fabric of the stent cover and interfere with suture placement.
When attaching the protective band to the valve, the ends of the band are butted together and secured with a double armed suture. The band is then positioned on the valve and both ends of the suture passed through the sewing ring and over the valve annulus. One end of the suture pro-ceeds through the sewing ring and intermediate depressions 12 as illustrated in Figure 4. The two ends of the suture are finally tied so the knot is located over the valve orifice.
The protective band is removed by cutting one strand of the retention suture at a point over the valve orifice.
When an interrupted mattress stitch is used for a valve installation, the band is not removed until all the sutures have been placed through the sewing ring. When a continuous or semicontinuous suturing technique is used to sew the valve directly in place, the band is removed before the valve is positioned for suturing.
While the foregoing description has been directed to a preferred embodiment of the protective band of the present invention, it will be appreciated that certain variations thereof which are functionally equivalent are also included within the scope of the invention. For example, the circular depressions illustrated in the Figures as suture guide means may be converted to openings extending through the band, and the suture threaded through these openings rather than being sewn through the band material.
In another alternative embodiment, the double row of circular depressions at the ends of the strip may be replaced by a plurality of single, elongated depressions extending across the width of the band, or by a pair of elongated channels extending lengthwise along either side VC~-~5 ~l76saz of the central axis of the band. A singular elongated depression 12 located at the midpoint of the protective strip may also be used rather than the pair of depressions as illustrated in Figure 1. These and other variations will be apparent to those skilled in the art in view of the disclosure contained herein.
C~;
~EART VALVE PROTECTOR
-BACKGROUND OF INVENTION
Field of the Invention This invention relates to prosthetic heart valves and, more particularly, to an apparatus and method for protect-ing valve cusp material against inadvertent needle punc-ture or tear during the implantation of the valve in thepatient.
Description of Prior Art Prosthetic tissue heart valves constructed of autologous or hemologous fascia lata, dura matter or heterologous pericardium are described in U. S. Patent Nos. 4,084,268 and 4,172,295. Typically, such valves are constructed by securing the tissue around the outside of a valve stent or framework having a circular base at one end and three axially-extending commissure posts interconnected by valleys at the other end. The tissue is supported at three points by the stent posts while the tissue interme-diate the stent posts extends through the valleys and into the center of the stent to form three valve cusps.
The valve stent also includes a sewing cushion around the circular base portion as illustrated in the above-re~erenced patents. The sewing cushion provides a means - 30 for attaching the valve to the patient by suturing through the sewing cushion. In one method of implanting the valve, a plurality of sutures are placed through the sewing cushion and the mounting site in the patient using an interrupted mattress stitch while holding the valve several inches away from the mounting site. When all the ~768~Z
sutures are in place, the valve is guided down the suture lines into the mounting position and the sutures are tied off.
In the case of valves constructed of pericardium or other natural tissues, the tissue is positioned outside the stent as illustrated in the above-referenced patents. The tissue is thusly exposed and subject to needle damage as the mounting sutures are placed through the sewing ring.
Since the operating area is cramped and vision may be limited, especially in the case of mitral valve replace-ment where the cusps of the valve are directed away from the surgeon and shielded from view by the sewing ring, great care must be taken when passing the mounting sutures through the sewing ring to avoid accidentally piercing or tearing the valve tissue. Because of the delicate nature of the tissue, a single needle hole can seriously compro-mise the long-term performance and durability of the valve.
It is accordingly an object of the present invention to provide a method and device for protecting the cusp material of a prosthetic heart valve against needle damage during the installation procedure. It is a further object ~5 of the present invention to provide a protective device which is easily removed from the heart valve after all the mounting sutures are in place. These and other objects of the present invention will be apparent from the ensuing description and claims.
Summary of the Invention Pericardial and other prosthetic tissue heart valves susceptible to needle damage during installation are protected from such damage by uroviding a protective band to surround and cover the valve tissue VC~ ~^5 ~768(~;~
immediately adjacent the sewing cushion. The protector may consist of a strip of plastic material which is formed into a cylinder and secured to the valve by a single retention suture. The suture is attached to the protec-S tive band at each end and at one or more points betweenthe ends, traversing the valve by passing through the sewing ring and across the valve orifice.
The retention suture traversing the orifice of the valve 0 i5 highly visible and assures that the valve will not be inadvertently be installed with the protector in place.
Once all the mounting sutures have been positioned through the sewing ring, the protector is removed by cutting the retention suture in the area of the valve orifice and pulling it free of the valve and pro-ective band. Once the retention suture has been removed, the protector is readily withdrawn from between the mounting sutures.
To facilitate suturing through the protector, the plastic strip is provided with a plurality of dimples and/or channels having a thin base-thickness at its ends and midpoint. ~ultiple rows of dimples or channels across the width of the strip are provided at either end to permit the length of the strip to be adjusted to the circumfer-ence of the valve by cutting off excess strip material.
Description of Drawings Figure 1 is a plan view of a protective band.
30Figure 2 is a cross-sectional view of the protective band through line 2-2 of Figure 1.
Figure 3 is a cross-sectional view of the protective band through line 3-3 of Figure 1.
VC~-5 1~7~8~Z
Figure 4 is a view in perspective of a mitral valve with the protective band in position.
Figure 5 is a partial view showing the suture placement at a point between the ends of the protective band.
Figure 6 is a partial view showing the suture placement at the ends of the protective band.
Description Referring now to Figure 1 there is i~lustrated at 10 a side plan view of a protective band of the present invention comprising a strip of plastic sheet material, suitably polypropylene, having a length corresponding to the ou~side circul~ference of the prosthetic tissue heart valve. The width of the strip is preferably at least about 0.25 inches, and the thickness is about 0.02 inches.
On one side at each end of the band are located suture guide means in the form of a double row of circular depressions 11 centrally disposed about the major axis of said strip and extending inward from the ends in a spaced relationship over a distance of at least about 0.5 inches.
Between the ends of the band and aligned with one row of circular depressions are elongated depressions 12 which are preferably about 0.25 inches long. Each depression has a base thickness of less than about 0.01 inches as illustrated in Figures 2 and 3 which are cross-sectional views at lines 2-2 and 3-3 respectively of Figure 1.
The protective band is affixed to the heart valve as illustrated in Figure 4 which is a view in perspective of a mitral heart valve with the protective band in place.
Referring to Figure 4, retention suture 20 passes through both ends of the protective band and through the sewing vcRr ."S
~1768(~Z
ring 16 of the valve and across the valve orifice. The intermediate portion of the band, hidden from view in Figure 4, is secured at two points by the suture as illustrated in Figure 5, the suture passing through the thin-base portion of elongated depressions 12 and thence returning through the sewing cushion. At the ends of the protective band, the suture passes through the outer most circular depressions in a figure X as illustrated in Figure 6. The suture is always placed through the outermost row of depressions at the end of the protective band, and multiple depressions are provided to enable the band to be shortened if necessary to fit smaller size valves by cutting off appropriate end sections at one or both ends of the protective strip.
The circular and elongated depressions in the band facili-tate the suture attachment of the band to the valve since the thin areas in the base of the depressions are easily pierced by a surgical needle.
The preferred material for band construction is polypro-pylene which is soft and flexible, easily molded and easily stitched. Other suitable materials include poly-ethylene, nylon, polyvinylchloride and other nontoxic polymeric compositions which possess the desirable combination of physical properties.
The protective band is intended primarily for use on heart valves constructed of natural or synthetic sheet materials such as pericardium, fascia lata, dura matter or polyur-ethane, and where the construction of the valve places the sheet material on the outside of the valve stent where it is particularly exposed and susceptible to needle damage.
The band may, of course, also be used in conjunction with porcine heart valve~ where, although the valve tissue is contained within th~ confines of the stent, the needles of VCR-~
-6- 1~768~Z
the mounting sutures may catch in the fabric of the stent cover and interfere with suture placement.
When attaching the protective band to the valve, the ends of the band are butted together and secured with a double armed suture. The band is then positioned on the valve and both ends of the suture passed through the sewing ring and over the valve annulus. One end of the suture pro-ceeds through the sewing ring and intermediate depressions 12 as illustrated in Figure 4. The two ends of the suture are finally tied so the knot is located over the valve orifice.
The protective band is removed by cutting one strand of the retention suture at a point over the valve orifice.
When an interrupted mattress stitch is used for a valve installation, the band is not removed until all the sutures have been placed through the sewing ring. When a continuous or semicontinuous suturing technique is used to sew the valve directly in place, the band is removed before the valve is positioned for suturing.
While the foregoing description has been directed to a preferred embodiment of the protective band of the present invention, it will be appreciated that certain variations thereof which are functionally equivalent are also included within the scope of the invention. For example, the circular depressions illustrated in the Figures as suture guide means may be converted to openings extending through the band, and the suture threaded through these openings rather than being sewn through the band material.
In another alternative embodiment, the double row of circular depressions at the ends of the strip may be replaced by a plurality of single, elongated depressions extending across the width of the band, or by a pair of elongated channels extending lengthwise along either side VC~-~5 ~l76saz of the central axis of the band. A singular elongated depression 12 located at the midpoint of the protective strip may also be used rather than the pair of depressions as illustrated in Figure 1. These and other variations will be apparent to those skilled in the art in view of the disclosure contained herein.
C~;
Claims (18)
1. In a prosthetic heart valve comprising a cylindrical stent, sheet material overlying the stent and extending inwardly to form a closure within the confines of said stent, and a sewing cushion encircling the stent at one end thereof, the improvement comprising a removable protective band circumscribing the stent and overlying the sheet material immediately adjacent said sewing cushion.
2. The valve of Claim 1 wherein said protective band is secured to said valve by means of a single retention suture passing through the band and sewing cushion and traversing the orifice of the valve.
3. The valve of Claim 1 wherein the band is fabricated of a polymeric material.
4. The valve of Claim 3 wherein said protective band is molded of polypropylene.
5. The valve of Claim 2 wherein said protective band includes depressions at locations where the suture is passed through the band.
6. The valve of Claim 2 wherein said band includes openings at locations where the suture is passed through the band.
7. The valve of Claim 2 wherein the protective band comprises an elongated strip formed into a cylinder with the ends secured by said retention suture.
8. The valve of Claim 1 wherein said protective band is at least about 0.25 inches wide.
9. The valve of Claim 1 wherein said sheet material is a natural tissue material.
10. The valve of Claim 8 wherein said natural tissue material is selected from the group consisting of pericardium, fascia lata and dura matter.
11. The valve of Claim 1 wherein said sheet material is polyurethane.
12. A protective band adapted to circumscribe a prosthetic heart valve constructed of natural or synthetic sheet material and comprising a flat, elongated strip having a length corresponding to the circumference of said valve a width of at least about 0.25 inches, said band having a plurality of suture guide means at each end thereof and at least one suture guide means intermediate said ends.
13. A protective band of Claim 12 wherein said strip is fabricated of a nontoxic polymeric material.
14. The protective band of Claim 13 wherein said protective band is molded of polypropylene.
15. The protective band of Claim 12 wherein said suture guide means comprise openings through said strip.
16. The protective band of Claim 12 wherein said suture guide means comprise depressions in one surface of said strip.
17. The protective band of Claim 16 wherein the thickness of said strip is about 0.02 inches, and the thickness at the base of said depressions is less than about 0.01 inches.
18. The protective strip of Claim 12 wherein said strip includes a double row of suture guide means centrally disposed about the major axis of said strip at each end thereof and a pair of elongated suture guide means aligned with one of said rows and equidistantly spaced between the ends of said strip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US287,606 | 1981-07-28 | ||
| US06/287,606 US4364126A (en) | 1981-07-28 | 1981-07-28 | Heart valve with removable cusp protector band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1176802A true CA1176802A (en) | 1984-10-30 |
Family
ID=23103624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000408100A Expired CA1176802A (en) | 1981-07-28 | 1982-07-26 | Heart valve protector |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4364126A (en) |
| JP (1) | JPS5827556A (en) |
| BR (1) | BR8204387A (en) |
| CA (1) | CA1176802A (en) |
| CH (1) | CH657039A5 (en) |
| DE (1) | DE3227829A1 (en) |
| ES (1) | ES278712Y (en) |
| FR (1) | FR2510396B1 (en) |
| GB (1) | GB2102545B (en) |
| NL (1) | NL8202900A (en) |
Families Citing this family (91)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4510628A (en) * | 1982-05-03 | 1985-04-16 | University Of Utah | Artificial heart valve made by vacuum forming technique |
| US4473423A (en) * | 1982-05-03 | 1984-09-25 | University Of Utah | Artificial heart valve made by vacuum forming technique |
| US4680031A (en) * | 1982-11-29 | 1987-07-14 | Tascon Medical Technology Corporation | Heart valve prosthesis |
| US4629459A (en) * | 1983-12-28 | 1986-12-16 | Shiley Inc. | Alternate stent covering for tissue valves |
| US4759758A (en) * | 1984-12-07 | 1988-07-26 | Shlomo Gabbay | Prosthetic heart valve |
| US4725274A (en) * | 1986-10-24 | 1988-02-16 | Baxter Travenol Laboratories, Inc. | Prosthetic heart valve |
| JPS63273199A (en) * | 1987-04-30 | 1988-11-10 | Omron Tateisi Electronics Co | Ultrasonic vehicle detector |
| WO1989000841A1 (en) * | 1987-07-27 | 1989-02-09 | St. Jude Medical, Inc. | Protective shield for prosthetic heart valves |
| US4851000A (en) * | 1987-07-31 | 1989-07-25 | Pacific Biomedical Holdings, Ltd. | Bioprosthetic valve stent |
| US5350420A (en) * | 1989-07-31 | 1994-09-27 | Baxter International Inc. | Flexible annuloplasty ring and holder |
| US5290300A (en) | 1989-07-31 | 1994-03-01 | Baxter International Inc. | Flexible suture guide and holder |
| AU6271196A (en) * | 1995-06-07 | 1996-12-30 | St. Jude Medical Inc. | Direct suture orifice for mechanical heart valve |
| CA2265754C (en) * | 1996-09-13 | 2006-10-24 | Medtronic, Inc. | Prosthetic heart valve with suturing member having non-uniform radial width |
| US5766240A (en) * | 1996-10-28 | 1998-06-16 | Medtronic, Inc. | Rotatable suturing ring for prosthetic heart valve |
| US5928281A (en) * | 1997-03-27 | 1999-07-27 | Baxter International Inc. | Tissue heart valves |
| US7722667B1 (en) | 1998-04-20 | 2010-05-25 | St. Jude Medical, Inc. | Two piece bioprosthetic heart valve with matching outer frame and inner valve |
| US6176877B1 (en) | 1998-04-20 | 2001-01-23 | St. Jude Medical, Inc. | Two piece prosthetic heart valve |
| US6074418A (en) | 1998-04-20 | 2000-06-13 | St. Jude Medical, Inc. | Driver tool for heart valve prosthesis fasteners |
| US6602289B1 (en) | 1999-06-08 | 2003-08-05 | S&A Rings, Llc | Annuloplasty rings of particular use in surgery for the mitral valve |
| JP2001309969A (en) * | 2000-04-28 | 2001-11-06 | Gunze Ltd | Artificial dura mater |
| US6468305B1 (en) | 2000-05-16 | 2002-10-22 | St. Jude Medical, Inc. | Two piece valve |
| US8366769B2 (en) | 2000-06-01 | 2013-02-05 | Edwards Lifesciences Corporation | Low-profile, pivotable heart valve sewing ring |
| US6409758B2 (en) | 2000-07-27 | 2002-06-25 | Edwards Lifesciences Corporation | Heart valve holder for constricting the valve commissures and methods of use |
| US6846325B2 (en) | 2000-09-07 | 2005-01-25 | Viacor, Inc. | Fixation band for affixing a prosthetic heart valve to tissue |
| US7374571B2 (en) * | 2001-03-23 | 2008-05-20 | Edwards Lifesciences Corporation | Rolled minimally-invasive heart valves and methods of manufacture |
| US7097659B2 (en) | 2001-09-07 | 2006-08-29 | Medtronic, Inc. | Fixation band for affixing a prosthetic heart valve to tissue |
| US6755857B2 (en) | 2001-12-12 | 2004-06-29 | Sulzer Carbomedics Inc. | Polymer heart valve with perforated stent and sewing cuff |
| US7201771B2 (en) | 2001-12-27 | 2007-04-10 | Arbor Surgical Technologies, Inc. | Bioprosthetic heart valve |
| US6719786B2 (en) | 2002-03-18 | 2004-04-13 | Medtronic, Inc. | Flexible annuloplasty prosthesis and holder |
| US7959674B2 (en) | 2002-07-16 | 2011-06-14 | Medtronic, Inc. | Suture locking assembly and method of use |
| US7172625B2 (en) * | 2002-07-16 | 2007-02-06 | Medtronic, Inc. | Suturing rings for implantable heart valve prostheses |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099016A (en) * | 1960-08-11 | 1963-07-30 | Edwards Miles Lowell | Heart valve |
| CH428089A (en) * | 1963-06-10 | 1967-01-15 | Presna Mechanika Narodni Podni | Artificial heart valve |
| US3551913A (en) * | 1968-04-02 | 1971-01-05 | Donald P Shiley | Heart valve prosthesis with guard structure |
| US3589392A (en) * | 1969-05-05 | 1971-06-29 | Louis C Meyer | Split leaflet check valve for cardiac surgery and the like |
| US3755823A (en) * | 1971-04-23 | 1973-09-04 | Hancock Laboratories Inc | Flexible stent for heart valve |
| CA1069652A (en) * | 1976-01-09 | 1980-01-15 | Alain F. Carpentier | Supported bioprosthetic heart valve with compliant orifice ring |
| US4084268A (en) * | 1976-04-22 | 1978-04-18 | Shiley Laboratories, Incorporated | Prosthetic tissue heart valve |
| US4172295A (en) * | 1978-01-27 | 1979-10-30 | Shiley Scientific, Inc. | Tri-cuspid three-tissue prosthetic heart valve |
| US4222126A (en) * | 1978-12-14 | 1980-09-16 | The United States Of America As Represented By The Secretary Of The Department Of Health, Education & Welfare | Unitized three leaflet heart valve |
| US4211325A (en) * | 1979-06-07 | 1980-07-08 | Hancock Laboratories, Inc. | Heart valve holder |
-
1981
- 1981-07-28 US US06/287,606 patent/US4364126A/en not_active Expired - Fee Related
-
1982
- 1982-07-19 NL NL8202900A patent/NL8202900A/en not_active Application Discontinuation
- 1982-07-21 CH CH4456/82A patent/CH657039A5/en not_active IP Right Cessation
- 1982-07-26 DE DE19823227829 patent/DE3227829A1/en not_active Withdrawn
- 1982-07-26 FR FR8212984A patent/FR2510396B1/en not_active Expired
- 1982-07-26 CA CA000408100A patent/CA1176802A/en not_active Expired
- 1982-07-27 ES ES1982278712U patent/ES278712Y/en not_active Expired
- 1982-07-27 GB GB08221738A patent/GB2102545B/en not_active Expired
- 1982-07-27 JP JP57129757A patent/JPS5827556A/en active Pending
- 1982-07-27 BR BR8204387A patent/BR8204387A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH657039A5 (en) | 1986-08-15 |
| ES278712Y (en) | 1985-04-16 |
| DE3227829A1 (en) | 1983-02-17 |
| US4364126A (en) | 1982-12-21 |
| FR2510396B1 (en) | 1986-05-09 |
| GB2102545B (en) | 1985-01-09 |
| FR2510396A1 (en) | 1983-02-04 |
| BR8204387A (en) | 1983-07-19 |
| NL8202900A (en) | 1983-02-16 |
| GB2102545A (en) | 1983-02-02 |
| JPS5827556A (en) | 1983-02-18 |
| ES278712U (en) | 1984-10-16 |
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