WO1988002247A1 - Valve cardiaque artificielle - Google Patents

Valve cardiaque artificielle Download PDF

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Publication number
WO1988002247A1
WO1988002247A1 PCT/JP1986/000501 JP8600501W WO8802247A1 WO 1988002247 A1 WO1988002247 A1 WO 1988002247A1 JP 8600501 W JP8600501 W JP 8600501W WO 8802247 A1 WO8802247 A1 WO 8802247A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve plate
heart valve
holding ring
fully closed
Prior art date
Application number
PCT/JP1986/000501
Other languages
English (en)
Japanese (ja)
Inventor
Akio Suzuki
Original Assignee
Kabushiki Kaisha Tatebe Seishudo
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kabushiki Kaisha Tatebe Seishudo filed Critical Kabushiki Kaisha Tatebe Seishudo
Priority to PCT/JP1986/000501 priority Critical patent/WO1988002247A1/fr
Publication of WO1988002247A1 publication Critical patent/WO1988002247A1/fr

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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

Definitions

  • the present invention relates to a hinge-heart valve applied when a native valve is damaged due to a disease or the like, and particularly includes a multi-leaf valve plate and an annular holding ring for holding the valve plate. Related to artificial heart valves.
  • Prosthetic heart valves have been used in patients whose natural valves have been damaged, such as by congenital malformation or disease.
  • the one-leaf valve provided with the disc-shaped valve plate has a problem that the valve plate does not block the blood flow and can not secure a natural blood flow regardless of the opening and closing method.
  • the heart valve of a living body consists of two or three leaf valves, for example, the mitral valve consists of two leaf valves, the aortic valve, the pulmonary valve and the tricuspid valve consist of three leaf valves.
  • the valve ⁇ f ⁇ has a large: vigorous structure. Therefore, in view of this point, the artificial heart valve is preferably a two-leaf or three-leaf valve, but a two-leaf valve has been developed but a three-leaf valve has not been developed yet.
  • a ring-shaped valve plate is pivotally supported in a two-leaf opening / closing manner on a ring for holding the ring. Is located near the center of the retaining ring. For this reason, the valve plate is configured to rotate around the center of the protection ring as a fulcrum, and the outer circumference of the valve draws a trajectory passing through the circumference of the dependent valve «close to the heart muscle. As a result, the outer edge of the valve plate may interfere with the myocardium or arterial wall, and the left ventricle is particularly likely to be thickened due to the thick myocardium. The disadvantage is that the direction must be carefully selected so that it does not interfere. Also, the valve plate opens.
  • the present invention has been made in view of the above-described circumstances.
  • the S-like process is to use a heart valve with a structure close to the living body to obtain a blood flow close to nature without interfering with the myocardium around the valve at the time of opening and closing, and to increase the central flow of the blood flow.
  • a prosthetic heart valve To provide a prosthetic heart valve.
  • the prosthetic heart valve of the present invention has a holding ring that forms a valve port on the inside, and a position between the fully open position and the fully closed position by using two distant points on the inner peripheral edge of the holding ring as pivot points. It has a plurality of leaf plates that pivot and open and close the valve port.Each valve has an arc-shaped outer edge and a pair of linear side edges that converge toward the apex. However, when the valve is fully closed, the sides of adjacent valve plates are brought into contact with each other to close the valve port. According to the heart valve having the above configuration, the valve is a two-leaf valve, a three-leaf valve or more valves.
  • FIG. 1 is a cross-sectional view of an artificial heart valve according to the present invention
  • FIG. 2 is a plan view of FIG. 1
  • FIG. 3 is an explanatory view of an engagement state between a pivot and a bearing groove
  • FIG. Fig. 5 is a plan view of Fig. 4
  • Fig. 5 is a plan view of Fig. 4
  • Fig. 7 is a cross-sectional view of the protruding embodiment of Fig. 7
  • Fig. 7 is a plan view of Fig. 6
  • Fig. 6 shows a side view of the valve plate in the example shown in Fig. 6.
  • Fig. 9 shows a cross-sectional view of a conventional artificial heart valve.
  • Fig. 10 shows a conventional artificial heart valve when fully opened.
  • TL Doctor is a plan view of the ion.
  • the conventional artificial heart valve has a semi-circular two-leaf pivotable inside an annular holding ring 41.
  • the valve plates 45, 45 are held.
  • the holding ring 41 is formed of a cylindrical body, the inner opening of which forms a valve port 42, and the inner periphery 43 of which forms a sealing surface.
  • two pairs of bearing grooves 44 facing each other in the diametric direction are formed on the inner peripheral edge 43, and each of the bearing grooves 44 is, as is apparent from the plan view of FIG. It is formed near the diameter line d.
  • the valve plate 45 which is pivotally held in the holding ring 41, has an arc-shaped outer surface 46 and a linear side surface 47, and when the valve is fully closed, the arc-shaped outer edge 4 6 and the inner periphery 43 of the retaining ring 41 are brought into contact with each other, and the straight sides ⁇ 47 of the two-leaf valve plate 45 are attached to each other, thereby closing the valve port 42.
  • a pivot shaft 48 is provided near the boundary between the arc-shaped outer edge 46 and the linear side surface 47, and the pivot shaft 48 is formed in the bearing groove 4. The valve plate 45 is pivotally held on the holding ring 41 by being fitted to the hole 4.
  • FIG. 9 and 10 show the state of the heart valve constructed as described above when it is fully closed and when it is fully J3 ⁇ 4.
  • the pressure of the blood on the lower side is higher than the pressure on the upper side across the valve ⁇ 45, and this pressure difference causes the linear side edges 47 of the two-leaf valve plate 45 to abut each other and the arc-shaped outer edge 4 6 And the inner periphery 43 of the retaining ring 41 comes into contact with each other, thereby interrupting blood flow.
  • fully opened 10 is shown in FIG. 10
  • the valve plate 25 is rotated about the pivot shaft 48 by the energy of the fluid flowing downward from above in the figure, and the valve is fully opened. Becomes At this time, as shown by the arrow, the trajectory passing very close to the myocardium surrounding the heart valve is drawn.
  • the above-described conventional heart valve has a disadvantage that the arcuate outer edge 46 of the valve plate 45 may interfere with the myocardium at the time of opening and closing, and the opening and closing operation can be reliably performed.
  • the opening 49 a formed between the valve plate 43 and the valves 45, 45 and the holding ring 41 is formed. Blood flows from the three openings consisting of two openings 49b and 49b. Since the opening 49a formed between the valves 45, 45 is not so wide, the central flow of the so-called blood flow flowing through this opening is not so large as to the left, and is therefore close to the natural blood flow.
  • the disadvantage is that no blood flow can be obtained.
  • the blood flow passes through the valve plate, the blood flow is diverted into three directions. At this time, the blood flow is disturbed and becomes a turbulent flow, and sometimes blood components are damaged.
  • the O ⁇ valve refers to the 3 ⁇ valve, and this heart valve is applied, for example, to the aortic and tricuspid valves.
  • reference numeral 1 is an annular retaining ring, The inner opening of the ring 1 forms a valve port 2 and its inner peripheral edge 3 forms a sealing surface.
  • the bearings 4 are formed at regular intervals so as to protrude inward from the inner circumference ⁇ 3 of ij, and the Sffl grooves 6 are formed on both sides 3 ⁇ 45, 5 of the bearing 4. , 6 are formed respectively.
  • a ring 8 is fitted to the outside of the holding ring 1, and the ring 8 constitutes a mounting flange for mounting to the myocardium.
  • valve plate 10 pivotally held in the holding ring 1 has an arcuate outer edge 11 and a pair of linear side edges 12 and 12 converging toward the apex,
  • the arcuate outer edge 11 and the inner peripheral edge 3 of the retaining ring 1 come into contact with each other, and the linear side edges 12 of the adjacent valve plates 10 are brought into contact with each other to close the valve port 2. It has become.
  • End faces 13 and 13 are provided at both boundaries between the arc-shaped outer edge 11 and the linear side edges 12 and 12 in the valve plate 1 mm, and the end faces 13 and 13 are pivotally connected to the end faces 13 and 13.
  • Reasons 14 and 14 are planted. Then, the pivot plates 14, 14 are engaged with climbing receiving grooves 6, 6 formed on both side surfaces 5, 5 of the bearing portion 4, so that the valve plate] 0
  • the bearing groove 6 is illustrated as an explanatory view of the engagement state between the bearing groove 6 and the pivot shaft 14.
  • the pivot shaft 14 has a substantially elliptical shape, and the side wall 6a of the bearing groove 6 forms a stopper when fully opened, and the side wall 6b forms a stopper when fully closed.
  • the engagement state between the bearing groove 6 and the pivot shaft 14 at the time of opening / closing can be seen.Since the pivot shaft 14 moves in a sliding manner by opening / closing the valve, the S sweeping effect of the thrombus is reduced.
  • the holding ring 1 and the valve element 1 are preferably formed of bi-port light carbon or ceramics.
  • the pressure of the blood on the lower side of the valve ⁇ 10 is higher than the pressure on the upper side of the valve ⁇ ⁇ ⁇ 10, and this pressure difference causes the adjacent linear side edges 12 of the three-leaf valve plate 10 to be adjacent to each other.
  • the circular arc ⁇ and the retaining ring 3 come into contact with each other, closing the valve port 2.
  • the side wall 6 b is in contact with the support shaft 14.
  • the joints of the sides 12 of the valve plate 10 extend in the generatrix direction of the circular surface of the imaginary cone whose bottom is the valve port 2 of the holding ring 1.
  • the apex of the three-leaf valve 1 is on a line passing through the center of the valve port 2.
  • Fig. 4 The fully opened state is shown in Fig. 4.
  • the valve ⁇ 10 is pivoted around the pivot shaft 14 as a center of gravity due to the energy of the fluid flowing from above to below in the figure. And the valve is fully opened.
  • the side ⁇ 1 2 of the valve ⁇ 10 is Draw a trajectory that swings outward from the center of valve port 2.
  • the side wall 6a and the pivot 14 are in contact.
  • the opening 15 is located between the center opening 15a, each ⁇ 10 and the inner peripheral edge 3 of the holding ring 1.
  • the center opening 15a occupies a large area. Therefore, the central flow flowing through the opening 15a can be increased.
  • FIG. 6 Another embodiment of the present invention will be described with reference to FIGS. 6 and 8.
  • FIG. 6 Another embodiment of the present invention will be described with reference to FIGS. 6 and 8.
  • the prosthetic heart valve in FIG. 6 shows a two-leaf valve, and this heart valve is applied, for example, to a mitral valve.
  • reference numeral 21 denotes an annular holding ring formed of a light carbon pipe
  • the holding ring 21 has an elliptical outer shape
  • the inner opening of the holding ring 21 has an inner opening.
  • a valve port 22 is formed, and an inner periphery 23 of the valve port 22 has a substantially elliptical shape and forms a sealing surface.
  • the inner peripheral edge 23 is formed with two pairs of bearing end faces 24 that are opposed to each other in the longitudinal direction, and a bearing groove 26 is formed on this end face.
  • valve ⁇ 30 formed of a light carbon pipe pivotally held in the holding ring 21 has an arc-shaped outer edge 31 and a straight side edge 32.
  • this linear side surface 32 has a pair of linear side edges that converge toward the vertex, assuming that the center of the side edge 32 is a virtual vertex. Will be.
  • pivot shafts 3 4, 3 4 protrude from both end surfaces 3 3, 3 3 of the valve plate 30.
  • the pivots 34, 34 are engaged with the bearing grooves 26, 26, so that the valve shaft 30 is pivotally supported by the holding ring 21.
  • the operation of the heart valve configured as described above is performed in exactly the same manner as the heart valve of FIG. 1, that is, when fully closed, the adjacent linear sides ⁇ 32 of the two-leaf valve plate 30 are connected to each other.
  • the valve plate 30 is pivoted about the pivot shaft 34 to be fully opened. At this time, the side edge 32 of the valve 30 draws a trajectory swinging outward from the core of the valve port 22.
  • the opening 35 at the time of full opening is formed between the center opening 3 ′ 5 a and the inner periphery ⁇ 2 of each valve plate 3 ⁇ waiting ring 21, as shown in FIG. It has an opening 35b and the central opening 35a occupies a large area.
  • the prosthetic heart valve of the present invention comprises a two-leaf valve, a three-leaf valve, or a multi-leaf valve or more, and when the valve plate pivots from the lever position to the fully open position, the valve is closed.
  • the top of the plate draws a trajectory from the center of the valve port to the outer periphery, and when the valve is fully open, the center of the valve port is open.
  • the artificial heart valve according to the present invention is useful when the native heart valve is damaged due to a disease or the like.

Abstract

Valve cardiaque artificielle pourvue d'un anneau de retenue définissant un orifice de valve sur son côté interne, et d'une pluralité d'éléments plats de valve montés sur pivots sur le bord de la circonférence interne de l'anneau de retenue de façon qu'ils puissent ouvrir et fermer l'orifice de la valve, les bords latéraux des éléments plats de valve étant en appui l'un contre l'autre lorsque l'orifice de la valve est complètement fermé. La structure de cette valve cardiaque est très similaire à celle d'un organe naturel. La valve peut s'ouvrir et se fermer sans interférer avec les muscles cardiaques qui l'entourent, ce qui permet d'obtenir un écoulement de sang naturel présentant un grand débit dans la partie centrale.
PCT/JP1986/000501 1986-09-30 1986-09-30 Valve cardiaque artificielle WO1988002247A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1986/000501 WO1988002247A1 (fr) 1986-09-30 1986-09-30 Valve cardiaque artificielle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1986/000501 WO1988002247A1 (fr) 1986-09-30 1986-09-30 Valve cardiaque artificielle

Publications (1)

Publication Number Publication Date
WO1988002247A1 true WO1988002247A1 (fr) 1988-04-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1986/000501 WO1988002247A1 (fr) 1986-09-30 1986-09-30 Valve cardiaque artificielle

Country Status (1)

Country Link
WO (1) WO1988002247A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007148A1 (fr) * 1989-11-14 1991-05-30 John Michael Hasenkam Prothese de valvules cardiaques
GB2239690A (en) * 1989-12-20 1991-07-10 Cardio Carbon Ltd Heart valve prosthesis.
WO1992021305A1 (fr) * 1991-06-06 1992-12-10 Medtronic, Inc. Prothese de valvule cardiaque a deux valves a courbure composite
US5236448A (en) * 1989-01-26 1993-08-17 Cardio Carbon Company Ltd. Heart valve prosthesis
GB2281371A (en) * 1993-08-26 1995-03-01 Nasser Rasmi Hassan Rasmi A prosthetic trileaflet heart valve
US5522886A (en) * 1994-07-29 1996-06-04 Milo; Simcha Heart valve prostheses
US5545216A (en) * 1995-05-16 1996-08-13 Medical Carbon Research Institute, Llc Prosthetic heart valve
US5843183A (en) * 1997-05-13 1998-12-01 Bokros; Jack C. Trileaflet heart valve
WO2001043666A1 (fr) * 1999-12-14 2001-06-21 Jcl Technic Ab Valvule cardiaque
US7445632B2 (en) 2003-05-05 2008-11-04 Rex Medical, L.P Percutaneous aortic valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49110194A (fr) * 1972-02-01 1974-10-19
JPS56161047A (en) * 1980-04-28 1981-12-11 Mitral Med Int Artificial cardiac valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49110194A (fr) * 1972-02-01 1974-10-19
JPS56161047A (en) * 1980-04-28 1981-12-11 Mitral Med Int Artificial cardiac valve

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5236448A (en) * 1989-01-26 1993-08-17 Cardio Carbon Company Ltd. Heart valve prosthesis
WO1991007148A1 (fr) * 1989-11-14 1991-05-30 John Michael Hasenkam Prothese de valvules cardiaques
GB2239690A (en) * 1989-12-20 1991-07-10 Cardio Carbon Ltd Heart valve prosthesis.
WO1992021305A1 (fr) * 1991-06-06 1992-12-10 Medtronic, Inc. Prothese de valvule cardiaque a deux valves a courbure composite
US5314467A (en) * 1991-06-06 1994-05-24 Medtronic, Inc. Composite curvature bileaflet prosthetic heart valve with serpentine curve hinge recesses
GB2281371A (en) * 1993-08-26 1995-03-01 Nasser Rasmi Hassan Rasmi A prosthetic trileaflet heart valve
US5522886A (en) * 1994-07-29 1996-06-04 Milo; Simcha Heart valve prostheses
US5545216A (en) * 1995-05-16 1996-08-13 Medical Carbon Research Institute, Llc Prosthetic heart valve
US5843183A (en) * 1997-05-13 1998-12-01 Bokros; Jack C. Trileaflet heart valve
US6059826A (en) * 1997-05-13 2000-05-09 Medical Carbon Research Institute, Llc Trileaflet heart valve
WO2001043666A1 (fr) * 1999-12-14 2001-06-21 Jcl Technic Ab Valvule cardiaque
US6890352B1 (en) 1999-12-14 2005-05-10 Jcl Technic Ab Vessel valve
US8167935B2 (en) 2000-11-21 2012-05-01 Rex Medical, L.P. Percutaneous aortic valve
US9138313B2 (en) 2000-11-21 2015-09-22 Rex Medical, L.P. Percutaneous aortic valve
US7803184B2 (en) 2001-11-14 2010-09-28 Rex Medical, L.P. Percutaneous aortic valve
US7445632B2 (en) 2003-05-05 2008-11-04 Rex Medical, L.P Percutaneous aortic valve

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