WO2001056511A1 - Gerüstfreie (stentlose) herzklappenbioprothese - Google Patents
Gerüstfreie (stentlose) herzklappenbioprothese Download PDFInfo
- Publication number
- WO2001056511A1 WO2001056511A1 PCT/DE2001/000466 DE0100466W WO0156511A1 WO 2001056511 A1 WO2001056511 A1 WO 2001056511A1 DE 0100466 W DE0100466 W DE 0100466W WO 0156511 A1 WO0156511 A1 WO 0156511A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coronary
- aortic root
- valve
- outlets
- outlet
- Prior art date
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
- A61F2/2412—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 with soft flexible valve members, e.g. tissue valves shaped like natural valves
-
- 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
- A61F2/2412—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 with soft flexible valve members, e.g. tissue valves shaped like natural valves
- A61F2/2415—Manufacturing methods
Definitions
- the present invention relates to the field of cardiac medicine and, more particularly, to a bioprosthesis for use in the treatment of a heart valve dysfunction in humans.
- the human heart for pumping blood through the body comprises two chambers (the left and the right heart chamber), each of which is provided with two valves to regulate the flow of blood into and out of them.
- the right ventricle these are the tricuspid and pulmonary valves, in the left the mitral and aortic valves.
- the aortic valve and the pulmonary valve in humans are both three-leaf valves that are similar in size and anatomy.
- valves Due to illness, one or more valves may no longer function normally (as a result of valve damage, degeneration or a congenital defect). Often, especially in the case of the aortic valve, a malfunction results from a narrowing of the valve opening (stenosis) or from a valve insufficiency in which the valve is not fully opened or closed. For some time now, these life-threatening heart valve malfunctions have been treated by replacing the valve with a prosthesis, with a distinction being made between so-called mechanical valves (in which the blood flow is regulated by one or more closures by means of a valve), which consist of rigid bodies, and so-called biological ones Valves, consisting of chemically pretreated biological tissue, in which the blood flow is regulated by natural valve leaflets. Bioprostheses are characterized by a lower thrombembolic risk compared to mechanical valves.
- Xeno-bioprosthesis 35 years ago, the first implantation of a Xeno bioprosthesis in the aortic position, which was implanted from bovine (bovine) chemically pretreated pericardium. Xeno-bioprosthesis has been on the rise since the introduction of glutaraldehyde for the chemical fixation of the collagen structure (through an intermolecular cross-linking of the collagen fibrils) of porcine (pig-derived) valves.
- prostheses available for replacing the aortic valve: artificial valves (mechanical double-wing prostheses made of pyrolytic carbon), xentografts (consisting of porcine aortic valves or bovine pericardium, with or without a scaffold (stent)), homologous grafts (obtained from the human aorta; scaffold-free) and autologous grafts (either the patient's own pericardium, mounted intraoperatively on a given scaffold, or the pulmonary valve removed from the patient and implanted in the aortic position).
- artificial valves mechanical double-wing prostheses made of pyrolytic carbon
- xentografts consisting of porcine aortic valves or bovine pericardium, with or without a scaffold (stent)
- homologous grafts obtained from the human aorta; scaffold-free
- autologous grafts either the patient's own pericardium, mounted intraoperatively on a given
- the mechanical stress on the xenoprostheses is particularly pronounced in the area of the valve commissures, while in the case of one's own aortic valve, part of the closing force is absorbed by the elasticity of the aortic wall.
- the valve-holding device of stented xenograft has a significantly lower elasticity than the aorta. The force is absorbed by the commissures when the flap closes.
- prostheses do not have a fixed holding device. Like all prostheses, they are fixed to the aortic annulus and their commissures are also sewn directly onto the aortic wall, which in turn absorbs some of the mechanical stress. The disadvantage of such scaffold-free valves is in particular a possible distortion of the valve geometry, which can result in prosthesis insufficiency.
- Bioprostheses xenoprostheses
- xenoprostheses are now offered by various manufacturers, for example the Hancock bioprosthesis (later Xenomedica (R) bioprosthesis) and the Carpentier-Edwards (R) valve. Both are procine, glutaralehyde-prepared aortic valves that are attached to a support ring.
- the Hancock bioprosthesis is attached to a flexible, dacron-coated circular polypropylene support ring of semi-flexible nature.
- the Dacron-coated ring supports are anatomically contoured and have a low profile.
- the flat, flexible support ring of the Carpentier-Edwards (R) bioprosthesis is made of a cobalt-nickel alloy that is coated with Teflon and has an asymmetrical base.
- bioprostheses that are free of supporting materials
- glutaraldehyde without ring support
- the implantation of bioprostheses treated with glutaraldehyde without ring support promises better clinical durability of these valves, since the functional unit between the aortic valve and the aortic root is preserved. This means that the flap pockets are not subjected to physiological stress, and the flap pockets are stressed physiologically, and the physiological hemodynamics with divergent flow without the formation of dead water are retained.
- Examples of commercially available stent-free bioprostheses without ring support are the Edwards Prima (R) bioprosthesis (manufacturer: Baxter Edwards AG, CH-6848 Switzerland), the Medtronic Freestyle (R) aortic root bioprosthesis (Medtronic, Inc. Minneapolis, Minn. 55432 -3576) and St. Jude Toronto (R) SPV Bioprosthesis (St. Jude Medical, Inc., St. Paul, Minn 55117).
- the present invention therefore relates to a heart valve bioprosthesis according to claim 1, preferably a biological heart valve prosthesis without ring support (frame-free or stentless bioprosthesis), consisting of a xenogenic aortic root reserved for implant purposes in a manner known per se, for example with glutaraldehyde Donor mammal, preferably the pig, the aortic root at a distance of approximately 120 degrees to each of the two originally existing coronary outlets, an opening is placed as an additional coronary outlet at a surgically or hemodynamically suitable location, generally in the valve sine without an original coronary outlet, and one of the two original coronary outlets in has been closed in a manner which is suitable for surgery and is known per se.
- a biological heart valve prosthesis without ring support frame-free or stentless bioprosthesis
- Fig. 1 The schematic top view of a glutaraldehyde-fixed porcine aortic valve cylinder with its two conor ports 1 and 2 and with the three sail flaps 4, 5 and 6.
- Fig. 2 The schematic plan view of the aortic valve cylinder rotated by 120 degrees compared to Fig. 1, on which, according to the invention, a coronary outlet, here the right coronary outlet 2, has been closed and a new coronary outlet opening, here the opening 3, has been produced.
- a coronary outlet here the right coronary outlet 2
- a new coronary outlet opening here the opening 3
- the numbers 4, 5 and 6 identify the three sail flaps.
- FIG. 3 The schematic side view of the aortic valve cylinder according to the invention with the openings 7a and 7b for receiving the coronary ostia, the coronary branches 1 and 3 of the Fig. 2 correspond.
- the marking line 8 marks the area of the aortic root in which modifications can be made intraoperatively without the function of the heart valve prosthesis being impaired.
- Numeral 9 indicates reinforcement with fabric.
- Fig.4 The original procine, glutaraldehyde-treated aortic root with the corona branches 1 (left coronary) and 2 (right coronary) as well as with the marking line 8 (see also Fig. 3) and the reinforcement with tissue (see also Fig. 3).
- Fig. 5 The top view of a porcine aortic root modified according to the invention with the coronary branches 1 (original), 2 (original, now closed) and 3 (new). The three sail flaps are visible in the positions marked with the numbers 4, 5 and 6.
- Fig. 6 The side view of a porcine aortic root modified according to the invention with the closed right coronary outlet 2 and the new outlet 3 as well as the marking line 8 and the reinforcement with tissue 9.
- the number 10 denotes the area of the aortic root below the right coronary outlet 2 (now closed ), the original usually with
- Muscle tissue that is usually removed this area can then advantageously be reinforced with fabric material, as has been done here.
- Fig. 7 The illustration corresponds to the side view of Fig. 6, whereby by rotating the aortic root modified according to the invention by 180 degrees, the original coronary outlet 1 is in the foreground and the closed coronary outlet 2 is on the left side of the image.
- Fig. 8 In this figure, the aortic root according to the invention has been rotated by 90 degrees compared to Fig. 7, so that the coronary branches 1 (old) and 3 (new) can be seen, while the closed branch 2 is not visible.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU40459/01A AU4045901A (en) | 2000-02-03 | 2001-02-05 | Stentless heart valve bioprosthesis |
DE10190290A DE10190290B4 (de) | 2000-02-03 | 2001-02-05 | Gerüstfreie (stentlose) Herzklappenbioprothese |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000104775 DE10004775A1 (de) | 2000-02-03 | 2000-02-03 | Gerüstfreie Herzklappenbioprothese |
DE10004775.0 | 2000-02-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001056511A1 true WO2001056511A1 (de) | 2001-08-09 |
Family
ID=7629729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/000466 WO2001056511A1 (de) | 2000-02-03 | 2001-02-05 | Gerüstfreie (stentlose) herzklappenbioprothese |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU4045901A (de) |
DE (1) | DE10004775A1 (de) |
WO (1) | WO2001056511A1 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992003990A1 (en) * | 1990-09-07 | 1992-03-19 | Baxter International Inc. | Stentless heart valve and holder |
WO1999033412A1 (en) * | 1997-12-24 | 1999-07-08 | Edwards Lifesciences Corporation | Stentless bioprosthetic heart valve with coronary protuberances |
-
2000
- 2000-02-03 DE DE2000104775 patent/DE10004775A1/de not_active Withdrawn
-
2001
- 2001-02-05 WO PCT/DE2001/000466 patent/WO2001056511A1/de active Application Filing
- 2001-02-05 AU AU40459/01A patent/AU4045901A/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992003990A1 (en) * | 1990-09-07 | 1992-03-19 | Baxter International Inc. | Stentless heart valve and holder |
WO1999033412A1 (en) * | 1997-12-24 | 1999-07-08 | Edwards Lifesciences Corporation | Stentless bioprosthetic heart valve with coronary protuberances |
Also Published As
Publication number | Publication date |
---|---|
DE10004775A1 (de) | 2001-08-23 |
AU4045901A (en) | 2001-08-14 |
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