CA1239503A - Artificial cardiac valve with active opening - Google Patents
Artificial cardiac valve with active openingInfo
- Publication number
- CA1239503A CA1239503A CA000450858A CA450858A CA1239503A CA 1239503 A CA1239503 A CA 1239503A CA 000450858 A CA000450858 A CA 000450858A CA 450858 A CA450858 A CA 450858A CA 1239503 A CA1239503 A CA 1239503A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- check
- ring
- rotation
- swell
- 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
- 210000003709 heart valve Anatomy 0.000 title claims abstract description 26
- 230000036772 blood pressure Effects 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000017531 blood circulation Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 description 5
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002296 pyrolytic carbon Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000001435 haemodynamic effect Effects 0.000 description 1
- 210000004115 mitral valve Anatomy 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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
- A61F2/2403—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 pivoting rigid closure members
-
- 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
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/009—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof magnetic
Abstract
ARTIFICIAL CARDIAC VALVE WITH ACTIVE OPENING
ABSTRACT OF THE DISCLOSURE
The present invention relates to a cardiac valve comprising a seat and at least one mobile element ensuring opening and closure of the valve, characterized in that said seat and/or said mobile element comprises at least one device, known per se, which ensures controlled opening of said valve when the blood pressure is balanced on both sides of said mobile element.
ABSTRACT OF THE DISCLOSURE
The present invention relates to a cardiac valve comprising a seat and at least one mobile element ensuring opening and closure of the valve, characterized in that said seat and/or said mobile element comprises at least one device, known per se, which ensures controlled opening of said valve when the blood pressure is balanced on both sides of said mobile element.
Description
~LZ395~3 --I
The present invention relates to an artificial cardiac valve adapted to be implanted in humans.
It is known to replace human cardiac valves by prostheses which all present a cheat< valve device allowing the blood to flow in 5 one direction and preventing it from Slowing back in the other. These valves comprise either a plastic ball playing in a cage (Starr-Edwards valve) and alternately clearing and obstructing a metal seat fixed to the heart, a disc moving parallel in a cage according to the same mode-titles as above (Bell valve), or an oscillating disc held by two claws 10 (Bjork valve).
These prostheses risk provoking coagulation of the blood, which may block the mechanism of the prosthesis and/or produce embolisms. This risk is principally associated with the very configuration of these prostheses which produce turbulences around the ball or the 15 disc occluding the valve.
Another mechanism, called "butterfly valve", constituted by an elastomers disc fixed to a central spindle (colt) is also known. This disc rests during closure time on radially disposed speckles implanted on the valve body. By reason of the existence of a fixed central spindle 20 and of speckles creating turbulences, the risks of coagulation are also considerable and this prosthesis has been abandoned.
French Patent Application No. 75 36074 (published under No. 2 331 997) discloses an artificial valve comprising:
a) a substantially circular ring comprising suture means of type known 25 per so, b) two mobile, semi-circular check valves resting on an inner ramp of this ring, c) a hinge system with double displacement allowing said check valves to male movements of rotation then of translation clearing the hinge 30 system, which device, by the "washing" that it occasions, makes it possible to reduce the risks of coagulation.
whatever the qualities of the various artificial valves known at present, they present two major drawbacks:
I) These are valves with passive opening, opening solely under 35 mechanical stresses (pressure gradients) and not valves with active so
The present invention relates to an artificial cardiac valve adapted to be implanted in humans.
It is known to replace human cardiac valves by prostheses which all present a cheat< valve device allowing the blood to flow in 5 one direction and preventing it from Slowing back in the other. These valves comprise either a plastic ball playing in a cage (Starr-Edwards valve) and alternately clearing and obstructing a metal seat fixed to the heart, a disc moving parallel in a cage according to the same mode-titles as above (Bell valve), or an oscillating disc held by two claws 10 (Bjork valve).
These prostheses risk provoking coagulation of the blood, which may block the mechanism of the prosthesis and/or produce embolisms. This risk is principally associated with the very configuration of these prostheses which produce turbulences around the ball or the 15 disc occluding the valve.
Another mechanism, called "butterfly valve", constituted by an elastomers disc fixed to a central spindle (colt) is also known. This disc rests during closure time on radially disposed speckles implanted on the valve body. By reason of the existence of a fixed central spindle 20 and of speckles creating turbulences, the risks of coagulation are also considerable and this prosthesis has been abandoned.
French Patent Application No. 75 36074 (published under No. 2 331 997) discloses an artificial valve comprising:
a) a substantially circular ring comprising suture means of type known 25 per so, b) two mobile, semi-circular check valves resting on an inner ramp of this ring, c) a hinge system with double displacement allowing said check valves to male movements of rotation then of translation clearing the hinge 30 system, which device, by the "washing" that it occasions, makes it possible to reduce the risks of coagulation.
whatever the qualities of the various artificial valves known at present, they present two major drawbacks:
I) These are valves with passive opening, opening solely under 35 mechanical stresses (pressure gradients) and not valves with active so
2 ~L23~3 opening, which open by themselves like the natural, suckled mitral valves, at the appropriate time in the absence of any pressure gradient, thus allowing better filling of the ventricles;
2) these valves are noisy, producing during closure time a metallic sound which is audible both to the patient and to any one in the vicinity.
Various aspects of this invention are as follows:
A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together forming a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof.
A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together fornling a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof including a pair of magnets, with one pa 3 magnet being carried by the check unit and the other magnet being carried by the fixed seat, wherein the magnets are disposed with the poles of the same polarity facing opposite each other.
A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together forming a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof including a spring carried by the fixed seat for engagement by the check unit.
According to an aspect of the invention in a cardiac valve comprising a seat and at least one mobile element ensuring opening and closure of the valve, said seat and/or said mobile element comprise a device, known per so, which ensures controlled opening of said valve when the blood pressure is balanced on both sides of said mobile element.
This valve with active opening further enables a haemodynamic yield to be obtained which is about 25%
greater than the yield of the valves available at present and consequently makes it possible to reduce the risks of coagulation of the blood and to improve the cardiac work. Finally, wear of the valve will be improved.
The cardiac valve with active ox nine according to the invention is composed of a seat (or fixing ring) and at least one mobile element (check valve) and is characterized in that at least said seat or said check valve comprises a device, known per so, which ensures 2b Do controlled opening of the valve when it is at rest, i.e.
when the blood pressure on both sides of the valve is balanced.
Sail known device may be of mechanical or magnetic S type, this not being limiting. In the mechanical devices, a spring blade fixed on the seat will, for example, be used, which will ensure a certain thrust which, at balance, will therefore provoke a certain opening of the valve. In the magnetic systems, there will be at least one small permanent magnet on the edgy of a check valve and at least one small permanent magnet in the seat, for example, these two magnets being so positioned as to exert a controlled repellent effect one on the other.
The device ensuring controlled opening of the valve when the latter is at rest may be used more particularly in the valves described in French Patent No. 75 36074.
Moreover, said valves may include the following substantial improvements over what is described in said Patent.
These improvements which may be implemented individually or in combination are as follows:
- In Patent No. 75 36074, the check valves pivot about two parallel axes constituted by two cylindrical rods (parallel, fast with the ring); it may be desirable to replace these two material spindles by two protuberances each fixed on the ring and together forming a fictitious axis positioned in the same way as the parallel cylindrical rods of the previous design.
In Patent No. 75 36074, the outer face of the check valve 10 is provided with barbs which surround the cylindrical rod forming axis and guide the displacement of the check valve in translation; it may be desirable to avoid the presence of these barbs and to arrange the upper face of the check valve so that this face presents, in that part thereof which will be in contact with the material spindle or the pro-15 tuberances according to the invention, a swell forming a groove in which said material spindle or said protuberances are inserted for said check valve to pivot.
The invention will be more readily understood on reading the following description with reference to the accompanying drawings, 20 in which:
Fig. I is a plan view of one of the symmetrical halves of the circular cardiac valve.
Fig. 2 is a view in section through a diametrical plane of the prosthesis, this view also showing a symmetrical half of the pros-25 thesis.
Fig. 3 shows a magnetic device for active opening.
Figs. PA and 4B show a transverse section through a check valve at two levels (central section PA and on the edge, at the level of the swell of the check valve, section I
Fig. 5 shows a mechanical device for active opening, in partial section.
Referring now to the drawings, the cardiac valve according to the invention essentially comprises two parts: a fixed part I and at least one mobile part 2.
The fixed part I is composed of a circular ring for example made of metal or pyrolytic carbon whose inner face presents a swell
2) these valves are noisy, producing during closure time a metallic sound which is audible both to the patient and to any one in the vicinity.
Various aspects of this invention are as follows:
A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together forming a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof.
A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together fornling a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof including a pair of magnets, with one pa 3 magnet being carried by the check unit and the other magnet being carried by the fixed seat, wherein the magnets are disposed with the poles of the same polarity facing opposite each other.
A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together forming a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof including a spring carried by the fixed seat for engagement by the check unit.
According to an aspect of the invention in a cardiac valve comprising a seat and at least one mobile element ensuring opening and closure of the valve, said seat and/or said mobile element comprise a device, known per so, which ensures controlled opening of said valve when the blood pressure is balanced on both sides of said mobile element.
This valve with active opening further enables a haemodynamic yield to be obtained which is about 25%
greater than the yield of the valves available at present and consequently makes it possible to reduce the risks of coagulation of the blood and to improve the cardiac work. Finally, wear of the valve will be improved.
The cardiac valve with active ox nine according to the invention is composed of a seat (or fixing ring) and at least one mobile element (check valve) and is characterized in that at least said seat or said check valve comprises a device, known per so, which ensures 2b Do controlled opening of the valve when it is at rest, i.e.
when the blood pressure on both sides of the valve is balanced.
Sail known device may be of mechanical or magnetic S type, this not being limiting. In the mechanical devices, a spring blade fixed on the seat will, for example, be used, which will ensure a certain thrust which, at balance, will therefore provoke a certain opening of the valve. In the magnetic systems, there will be at least one small permanent magnet on the edgy of a check valve and at least one small permanent magnet in the seat, for example, these two magnets being so positioned as to exert a controlled repellent effect one on the other.
The device ensuring controlled opening of the valve when the latter is at rest may be used more particularly in the valves described in French Patent No. 75 36074.
Moreover, said valves may include the following substantial improvements over what is described in said Patent.
These improvements which may be implemented individually or in combination are as follows:
- In Patent No. 75 36074, the check valves pivot about two parallel axes constituted by two cylindrical rods (parallel, fast with the ring); it may be desirable to replace these two material spindles by two protuberances each fixed on the ring and together forming a fictitious axis positioned in the same way as the parallel cylindrical rods of the previous design.
In Patent No. 75 36074, the outer face of the check valve 10 is provided with barbs which surround the cylindrical rod forming axis and guide the displacement of the check valve in translation; it may be desirable to avoid the presence of these barbs and to arrange the upper face of the check valve so that this face presents, in that part thereof which will be in contact with the material spindle or the pro-15 tuberances according to the invention, a swell forming a groove in which said material spindle or said protuberances are inserted for said check valve to pivot.
The invention will be more readily understood on reading the following description with reference to the accompanying drawings, 20 in which:
Fig. I is a plan view of one of the symmetrical halves of the circular cardiac valve.
Fig. 2 is a view in section through a diametrical plane of the prosthesis, this view also showing a symmetrical half of the pros-25 thesis.
Fig. 3 shows a magnetic device for active opening.
Figs. PA and 4B show a transverse section through a check valve at two levels (central section PA and on the edge, at the level of the swell of the check valve, section I
Fig. 5 shows a mechanical device for active opening, in partial section.
Referring now to the drawings, the cardiac valve according to the invention essentially comprises two parts: a fixed part I and at least one mobile part 2.
The fixed part I is composed of a circular ring for example made of metal or pyrolytic carbon whose inner face presents a swell
3 on which the edges of the check valve or valves abut to close the cardiac valve Said swell 3 is suitably interrupted to allow the check valves to pivot. This fixed part also comprises suitably disposed protuberances 5 4; these protuberances (two for each check valve) constitute the axis about which the check valve will pivot. Finally, the fixed part further presents two diametrically opposite swells 5 which constitute a stop rail to limit rearward displacement of the check valves and on which rail the rear part of the check valves abuts during rotation of said 10 valves.
The mobile part 2 is constituted by two generally flat, thin, semi-circular check valves which are preferably made of pyrolytic carbon or plastics material.
The upper taco of each check valve presents, at the spot 15 where the check valve will be in contact with the protuberances 4, two swells 6 of which each comprises a groove 7. During opening of the check valve, each protuberance 4 is inserted in said groove 7 in order subsequently to ensure pivoting of the check valve about the axis formed by the protuberances 4-4. During closure of the check 20 valve, the circulating blood will ensure washing of the hinge zone con-stituted by the protuberances 4 and the groove 7. The check valves comprise a notch 8 at the ends of their linear part which corresponds to the stop rail 5, thus controlling the displacement of the check valves in translation and in rotation. The cardiac valve as described hereinabove 25 comprises the improvements made to the cardiac valves described in French Patent No. 75 36074. However, according to the invention, said cardiac valve must also comprise at least one device which ensures active opening therefore The device shown in Fig. 3 is constituted by two magnets disposed opposite each other, the poles of the same 30 sign facing each other, one of these magnets 9 being fast with the ring I forming the fixed part of the cardiac valve and the other magnet 10 being fast with the check valve 2 of the cardiac valve; in Fig. 3, these two magnets are embedded in each of the parts constituting the cardiac valve. There may, of course, be several pairs of magnets 35 over the periphery of the cardiac valve.
Magnets 9 and/or 10 llnay be housed in a suitable excess thick-news of the fixed part and of the mobile check valve; they may also be glued on the surface of these two pieces or finely disposed (case of microscopic or ultramicroscopic magnets) in the material which constitutes the fixed part and/or the mobile part of the cardiac valve.
The various magnets disposed on the periphery of the check valve may be replaced by a single magnet which is semi-circular in shape or whose general form is that of a portion of circle.
It is also possible to replace the permanent magnets by electromagnets; in particular, the combination may be used of a light 10 magnetic piece located in the mobile part (check valve) of the cardiac valve with an electromagnet disposed in the fixed part of the valve.
The device shown in lug. 5 is constituted essentially by a spring 11 made of a resilient metal, which is fixed to the fixed part of the cardiac valve and which, at rest, maintains the check valve 15 in slightly open position.
The mobile part 2 is constituted by two generally flat, thin, semi-circular check valves which are preferably made of pyrolytic carbon or plastics material.
The upper taco of each check valve presents, at the spot 15 where the check valve will be in contact with the protuberances 4, two swells 6 of which each comprises a groove 7. During opening of the check valve, each protuberance 4 is inserted in said groove 7 in order subsequently to ensure pivoting of the check valve about the axis formed by the protuberances 4-4. During closure of the check 20 valve, the circulating blood will ensure washing of the hinge zone con-stituted by the protuberances 4 and the groove 7. The check valves comprise a notch 8 at the ends of their linear part which corresponds to the stop rail 5, thus controlling the displacement of the check valves in translation and in rotation. The cardiac valve as described hereinabove 25 comprises the improvements made to the cardiac valves described in French Patent No. 75 36074. However, according to the invention, said cardiac valve must also comprise at least one device which ensures active opening therefore The device shown in Fig. 3 is constituted by two magnets disposed opposite each other, the poles of the same 30 sign facing each other, one of these magnets 9 being fast with the ring I forming the fixed part of the cardiac valve and the other magnet 10 being fast with the check valve 2 of the cardiac valve; in Fig. 3, these two magnets are embedded in each of the parts constituting the cardiac valve. There may, of course, be several pairs of magnets 35 over the periphery of the cardiac valve.
Magnets 9 and/or 10 llnay be housed in a suitable excess thick-news of the fixed part and of the mobile check valve; they may also be glued on the surface of these two pieces or finely disposed (case of microscopic or ultramicroscopic magnets) in the material which constitutes the fixed part and/or the mobile part of the cardiac valve.
The various magnets disposed on the periphery of the check valve may be replaced by a single magnet which is semi-circular in shape or whose general form is that of a portion of circle.
It is also possible to replace the permanent magnets by electromagnets; in particular, the combination may be used of a light 10 magnetic piece located in the mobile part (check valve) of the cardiac valve with an electromagnet disposed in the fixed part of the valve.
The device shown in lug. 5 is constituted essentially by a spring 11 made of a resilient metal, which is fixed to the fixed part of the cardiac valve and which, at rest, maintains the check valve 15 in slightly open position.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together forming a common axis, said protuberances cooperating with grooves made in the two swells of each reck valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof.
2. A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each fixed on the ring and together forming a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof including a pair of magnets, with one magnet being carried by the check unit and the other magnet being carried by the fixed seat, wherein the magnets are disposed with the poles of the same polarity facing opposite each other.
3. A cardiac valve comprising a fixed seat having a passage for blood flow there through including a circular ring comprising suture means and a swell, a mobile check unit for opening and closing the passage including two substantially semi-circular check valves, each check valve including two swells and whose edges rest on the swell on said ring when the valve is closed, said check valves effecting in their displacements a movement of translation and a movement of rotation, wherein the axes of rotation of each valve are constituted by two protuberances each mixed on the ring and together forming a common axis, said protuberances cooperating with grooves made in the two swells of each check valve, and means for maintaining the check unit in a controlled opened position when blood pressure is balanced on both sides thereof including a spring carried by the fixed seat for engagement by the check unit.
4. The valve of claim 1, 2 or 3 wherein the ring comprises on its inner face two stop rails which control the displacement of the check valves in translation and in rotation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR83.05274 | 1983-03-30 | ||
| FR8305274A FR2543429B1 (en) | 1983-03-30 | 1983-03-30 | ARTIFICIAL HEART VALVE WITH ACTIVE OPENING |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1239503A true CA1239503A (en) | 1988-07-26 |
Family
ID=9287400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000450858A Expired CA1239503A (en) | 1983-03-30 | 1984-03-29 | Artificial cardiac valve with active opening |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4605408A (en) |
| EP (1) | EP0121473B1 (en) |
| JP (1) | JPS59230552A (en) |
| KR (1) | KR940002010B1 (en) |
| AT (1) | ATE35898T1 (en) |
| CA (1) | CA1239503A (en) |
| DE (1) | DE3472889D1 (en) |
| FR (1) | FR2543429B1 (en) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4935030A (en) * | 1985-06-17 | 1990-06-19 | Medtronic, Inc. | Mechanical heart valve prosthesis |
| US4851001A (en) * | 1987-09-17 | 1989-07-25 | Taheri Syde A | Prosthetic valve for a blood vein and an associated method of implantation of the valve |
| US4863459A (en) * | 1988-01-06 | 1989-09-05 | Olin Christian L | Bi-leaflet heart valve |
| US4979955A (en) * | 1988-06-06 | 1990-12-25 | Smith Robert M | Power assisted prosthetic heart valve |
| DE3828781A1 (en) * | 1988-08-25 | 1990-03-08 | Braun Melsungen Ag | HEART VALVE PROSTHESIS |
| EP0403649B1 (en) * | 1988-12-14 | 1995-02-15 | Aleksandr Petrovich Melnikov | Heart valve prosthesis |
| US4872875A (en) * | 1989-01-28 | 1989-10-10 | Carbon Implants, Inc. | Prosthetic heart valve |
| US5135538A (en) * | 1989-09-29 | 1992-08-04 | General Motors Corporation | Electromagnetically controlled heart valve |
| ES2092647T3 (en) * | 1991-10-31 | 1996-12-01 | Ats Med Inc | CARDIAC VALVE PROSTHESIS. |
| US5354330A (en) * | 1991-10-31 | 1994-10-11 | Ats Medical Inc. | Heart valve prosthesis |
| US5178632A (en) * | 1992-06-09 | 1993-01-12 | Hanson Richard D | Bi-leaflet heart valve prosthesis |
| US5554186A (en) * | 1994-12-22 | 1996-09-10 | Baxter International Inc. | Bileaflet mechanical heart valve having cropped slot pivot configuration and method for preventing blood stagnation therein |
| EP0844854A1 (en) * | 1995-08-07 | 1998-06-03 | Baxter International Inc. | Bileaflet mechanical heart valve having arrowhead slot hinge configuration |
| FR2744909B1 (en) * | 1996-02-20 | 1998-05-07 | Combustible Nucleaire Sicn Soc | HEART VALVE ACTIVATION SYSTEM |
| US6039759A (en) * | 1996-02-20 | 2000-03-21 | Baxter International Inc. | Mechanical prosthetic valve with coupled leaflets |
| DE19633346C1 (en) * | 1996-08-08 | 1998-04-23 | Sievers Hans Hinrich Prof Dr M | Heart valve prosthesis |
| EP0923353B1 (en) * | 1996-08-09 | 2005-01-19 | Edwards Lifesciences Corporation | Mechanical prosthetic valve with magnet |
| US5970801A (en) * | 1997-12-30 | 1999-10-26 | Bear Medical Systems, Inc. | Variable orifice flow sensor |
| US6638303B1 (en) | 1998-03-13 | 2003-10-28 | Carbomedics, Inc. | Heart valve prosthesis |
| US6432719B1 (en) * | 1999-02-16 | 2002-08-13 | Pe Corporation (Ny) | Matrix storage and dispensing system |
| US7101510B2 (en) * | 1999-02-16 | 2006-09-05 | Applera Corporation | Matrix storage and dispensing system |
| US6206918B1 (en) | 1999-05-12 | 2001-03-27 | Sulzer Carbomedics Inc. | Heart valve prosthesis having a pivot design for improving flow characteristics |
| US6558364B1 (en) * | 2000-08-30 | 2003-05-06 | Cathy D. Santa Cruz | Sanitary undergarment |
| US20050182483A1 (en) * | 2004-02-11 | 2005-08-18 | Cook Incorporated | Percutaneously placed prosthesis with thromboresistant valve portion |
| US8038708B2 (en) | 2001-02-05 | 2011-10-18 | Cook Medical Technologies Llc | Implantable device with remodelable material and covering material |
| US7449027B2 (en) * | 2004-03-29 | 2008-11-11 | Cook Incorporated | Modifying fluid flow in a body vessel lumen to promote intraluminal flow-sensitive processes |
| JP2006316840A (en) * | 2005-05-11 | 2006-11-24 | Wako Denshi Kk | Convection preventing valve device |
| US20070258862A1 (en) * | 2006-05-02 | 2007-11-08 | Applera Corporation | Variable volume dispenser and method |
| CN105200373A (en) * | 2015-09-14 | 2015-12-30 | 京东方科技集团股份有限公司 | Filling device and filling method for evaporation system of organic light emitting diode (OLED) |
| WO2022153300A1 (en) * | 2021-01-13 | 2022-07-21 | Michael Cohen | Mechanical valve systems with improved properties |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1095469B (en) * | 1958-02-28 | 1960-12-22 | Draegerwerk Ag | Control of the switching mechanism of devices for artificial ventilation with the help of magnets |
| US3370305A (en) * | 1965-05-28 | 1968-02-27 | Goott Bernard | Heart valve with magnetic hinge means |
| US3859668A (en) * | 1972-08-11 | 1975-01-14 | Medical Inc | Rotatable suturing member |
| GB1444614A (en) * | 1972-09-07 | 1976-08-04 | Kurpanek W H | Permanently implantable artificial heart |
| FR2331997A1 (en) * | 1975-11-19 | 1977-06-17 | Rhone Poulenc Ind | HEART VALVULAR PROSTHESIS |
| US4417360A (en) * | 1981-07-31 | 1983-11-29 | Manoutchehr Moasser | Nontraumatic prosthetic valve with magnetic closure |
-
1983
- 1983-03-30 FR FR8305274A patent/FR2543429B1/en not_active Expired
-
1984
- 1984-03-29 KR KR1019840001626A patent/KR940002010B1/en not_active IP Right Cessation
- 1984-03-29 AT AT84400631T patent/ATE35898T1/en not_active IP Right Cessation
- 1984-03-29 DE DE8484400631T patent/DE3472889D1/en not_active Expired
- 1984-03-29 US US06/594,736 patent/US4605408A/en not_active Expired - Fee Related
- 1984-03-29 EP EP84400631A patent/EP0121473B1/en not_active Expired
- 1984-03-29 CA CA000450858A patent/CA1239503A/en not_active Expired
- 1984-03-30 JP JP59063093A patent/JPS59230552A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59230552A (en) | 1984-12-25 |
| ATE35898T1 (en) | 1988-08-15 |
| EP0121473B1 (en) | 1988-07-27 |
| KR940002010B1 (en) | 1994-03-14 |
| US4605408A (en) | 1986-08-12 |
| KR840008128A (en) | 1984-12-13 |
| FR2543429A1 (en) | 1984-10-05 |
| FR2543429B1 (en) | 1986-09-26 |
| EP0121473A1 (en) | 1984-10-10 |
| DE3472889D1 (en) | 1988-09-01 |
| JPH0311229B2 (en) | 1991-02-15 |
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