Heart valve prosthesis

• US 4,078,268 A
• Filed: 09/07/1976
• Issued: 03/14/1978
• Est. Priority Date: 04/24/1975
• Status: Expired due to Term

• Current Assignee: St Jude Medical Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: St Jude Medical Incorporated (Abbott Laboratories Incorporated)
• Inventors: Possis, Zinon C.
• Primary Examiner(s): Frinks, Ronald L.
• Application Number:
  US05/720,776
• Time in Patent Office: 553 Days
• Field of Search: 3/1.5, 3/1, 137/527, 137/527.8, 137/512.1
• US Class Current: 623/2.21
• CPC Class Codes: A61F 2/2403 with pivoting rigid closure members check valves with hinged closure members in general F16K15/03
• CPC Class Codes: Y10T 137/7839 Dividing and recombining in a single flow path
• CPC Class Codes: Y10T 137/7903 Weight biased

Abstract

A heart valve prosthesis having an annular base carrying two pivoting valving members for use in a heart to control the flow of blood. The valving members are pivotally mounted on the annular base for pivotal movement about separate axes spaced from the center of the base. In one form of the prosthesis the base is removably attached to a suturing assembly adapted to be connected to heart tissue.

Claims

1. A heart valve prosthesis comprising:

a base having an inside annular wall surrounding a passage for carrying blood through the base, means for connecting the base to heart tissue, valving means located in the passage for controlling the flow of blood through the passage, said valving means comprising a first valving member having a convex curved leading edge and a transverse trailing edge, and a second valving member having a convex curved leading edge and a transverse trailing edge, first pivot means pivotally connecting the first member to the base for movement about a first axis offset in one direction from the center of the passage, second pivot means pivotally connecting the second member to the base for movement about a second axis offset in the direction opposite the one direction from the center of the passage, a first side member on the base projected in the direction of the flow of blood through the passage, a second side member on the base projected in the direction of the flow of blood through the passage, said second side member being opposite the first side member, each side member having first stop means engageable with the first valving member and second valving member to hold the first valving member and second valving member in inclined closed positions to restrict the flow of blood in one direction through the passage, and second stop means on the base engageable with the first valving member and the second valving member when the valving members are in their open positions.

2. The prosthesis of claim 1 wherein:

the first valving member and second valving member are inclined toward each other when in their closed positions.

3. The prosthesis of claim 2 wherein:

the inclination is about 45°

from the transverse plane of the passage.

4. The prosthesis of claim 1 wherein:

each side member has an inside surface coextensive with the inside annular wall of the base.

5. The prosthesis of claim 1 wherein:

the first stop means comprise inclined and converging lip portions providing seats engageable with parts of the valving members when the valving members are in their closed positions.

6. The prosthesis of claim 1 wherein:

the second stop means comprise projections extended from the base engageable with parts of the valving members when the valving members are in their open positions.

7. The prosthesis of claim 1 wherein:

each side member has a generally triangular shape.

8. The prosthesis of claim 1 wherein:

each valving member has a leading edge having a thickness about twice the thickness of the trailing edge, and generally flat side surfaces between the leading and trailing edges.

9. The prosthesis of claim 1 wherein:

each valving member is substantially balanced on its respective pivot means.

10. The prosthesis of claim 1 wherein:

the side members are located between the first axis and the second axis.

11. The prosthesis of claim 1 wherein:

the transverse trailing edges of the valving members are spaced apart when the valving members are in their closed positions.

12. The prosthesis of claim 1 wherein:

each valving member has outer peripheral edges spaced from the inside wall to allow limited reverse flow of blood between the valving members and the base when the valving members are in the closed positions.

13. The prosthesis of claim 1 wherein:

the means for connecting the base to heart tissue includes a sleeve, and coacting means on the base and sleeve allowing the base to be removed from the sleeve after the means is connected to the heart tissue.

14. The prosthesis of claim 1 wherein:

the first pivot means and the second means each includes pivot axles secured to opposite side edges of the first and second valving members, said pivot axles being located along a transverse pivot axis parallel to the linear trailing edges of the valving members, said transverse pivot axis being spaced from the midportions of the leading edges and trailing edges of the members.

15. The prosthesis of claim 14 wherein:

the distance from the pivot axes to the midpoint of the trailing edge is about twice the distance from the pivot axis to the midpoint of the leading edge.

16. The prosthesis of claim 1 wherein:

the means for connecting the base to heart tissue includes a sleeve having a cylindrical inside wall, an inside threaded section and an inside shoulder between the inside wall and the inside threaded section, said base having an outside wall and an outside threaded section and a shoulder between said outside wall and and outside threaded section, said inside and outside walls, threaded sections and shoulders engaging each other when the base is mounted on the sleeve, said sleeve having an outside annular channel, a suturing collar located in the channel adapted to be secured to heart tissue, and releasable lock means mounted on the sleeve and engageable with the base to fix the position of the base on the sleeve, said lock means having a lock position to fix the location of the base on the sleeve and a release position allowing the base to be mounted on and removed from the suturing means after the suturing means is attached to the heart tissue.

17. The prosthesis of claim 1 wherein:

the means for connecting the base to heart tissue includes a sleeve, coacting means on the base and sleeve allowing the base to be removed from the sleeve after the means is connected to the heart tissue, and lock means for locking the sleeve on the base, said lock means being movable to a release position to allow the base to be removed from the sleeve without removing the sleeve from the heart tissue.

18. The prosthesis of claim 1 wherein:

the first pivot means includes a first pair of pivot members secured to the base and projected into the passage and a second pair of pivot members secured to the base and projected into the passage, each pair of pivot members having one pivot member located adjacent one side of the first valving member and a second pivot member located adjacent the opposite side of the first valving member, and means on the first valving member cooperating with a pivot member of each pair of pivot members to control the the pivotal movement of the first valving member and retain the first valving member in assembled relation with the base, the second pivot means includes a first pair of pivot members secured to the base and projected into the passage and a second pair of pivot members secured to the base and projected into the passage, each pair of the pivot members of the second pivot means having one pivot member located adjacent one side of the second valving member and another pivot member located adjacent the opposite side of the second valving member, and means on the second valving member cooperating with a pivot member of each pair of pivot members of the second pivot means to control the pivotal movement of the second valving member and retain the second valving member in assembled relation with the base.

19. The prosthesis of claim 18 wherein:

the means on the first valving member comprise a pair of ears on opposite side portions of the first valving member, and the means on the second valving member comprise a pair of ears on opposite side portions of the second valving member.

20. The prosthesis of the claim 1 wherein:

the base has first and second semi-circular segments, and annular means holding the segments in a circular arrangement.

21. The prosthesis of claim 20 wherein:

the first pivot means includes a first pivot member on the first segment and a second pivot member on the second segment, and the second pivot means includes a first pivot member on the first segment and a second pivot member on the second segment.

22. A heart valve prosthesis comprising:

a base having an inside annular wall surrounding a passage for carrying blood through the base, valving means located in the passage movable to open and closed positions for controlling the flow of blood through the passage, said valving means comprising a first valving member having a convex curved leading edge and a transverse trailing edge, and a second valving member having a convex curved leading edge and a transverse trailing edge, first pivot means pivotally associating the first member with the base, said first pivot means having fulcrum portions engageable with the first valving member for controlling the movement of the first valving member in a location offset in one direction from the center of the passage, second pivot means pivotally associating the second member with the base, said second pivot means having fulcrum portions engageable with the second valving member for controlling the movement of the second valving member in a location offset in the direction opposite the one direction from the center of the passage, a first side member on the base projected in the direction of the flow of blood through the passage, a second side member on the base projected in the direction of the flow of blood through the passage, said second side member being opposite the first side member, each side member having first stop means engageable with the first valving member and second valving member to hold the first valving member and second valving member in inclined closed positions to restrict the flow of blood in one direction through the passage, and said first and second pivot means having second stop means on the base engageable with the first valving member and the second valving member when the valving members are in their open positions.

23. The prosthesis of claim 22 wherein:

the first valving member and second valving member are inclined toward each other when in their closed positions.

24. The prosthesis of claim 22 wherein:

each side member has an inside surface coextensive with the inside annular wall of the base.

25. The prosthesis of claim 22 wherein:

the first stop means comprise inclined and converging lip portions providing seats engageable with parts of the valving members when the valving members are in their closed positions.

26. The prosthesis of claim 22 wherein:

each valving member has a leading edge having a thickness about twice the thickness of the trailing edge, and generally flat side surfaces between the leading and trailing edges.

27. The prosthesis of claim 22 wherein:

the transverse trailing edges of the valving members are spaced apart when the valving members are in their closed positions.

28. The prosthesis of claim 22 wherein:

each valving member has outer peripheral edges spaced from the inside wall to allow limited reverse flow of blood between the valving members and the base when the valving members are in the closed positions.

29. The prosthesis of claim 22 wherein:

the first pivot means and the second pivot means each includes first and second pairs of pivot members on the base and ears on the valving members associated with the pairs of pivot members cooperating with a pivot member of each pair of pivot members to control the movement of the valving members.

30. The prosthesis of claim 22 wherein:

the base has first and second semi-circular segments, and annular means holding the segments in a circular arrangement, said first pivot and second pivot means each having a first pivot member on the first segment and a second pivot member on the second segment.

31. A heart valve prosthesis comprising:

a base having first and second semi-circular segments defining an inside annular wall surrounding a passage for carrying blood through the base and annular means holding said segments in circular arrangement, valving means movable to open and closed positions for controlling the flow of blood through the passage, said valving means comprising a first valving member and a second valving member, means cooperating with the valving members for controlling the opening and closing movements of the valving members and retaining the valving members in operative assembled relation with the base, said means cooperating with the valving members including first pivot means movably associating the first valving member with the base, said first pivot means having first and second pairs of pivot members secured to the base and engageable with separate portions of the first valving member, said first valving member having means cooperating with the first and second pairs of pivot members to retain the first valving member in assembled relation with the base, second pivot means movably associating the second valving member with the base, said second pivot means having first and second pairs of pivot members secured to the base and engageable with separate portions of the second valving member, said second valving member having means cooperating with the first and second pair of pivot members of the second pivot means to retain the second valving member in assembled relation with the base, said first pairs of pivot members of the pivot means being joined to said first segment and said second pairs of pivot members of said pivot means being joined to said second segment, and side members on the base projected in the direction of flow of blood through the passage, said side members having stop portions engageable with the first and second valving members when said first and second valving members are in their closed positions.

32. The prosthesis of claim 31 wherein:

the first valving member and second valving member are inclined toward each other when in their closed positions.

33. The prosthesis of claim 31 wherein:

the stop portions comprise inclined and converging lip portions providing seats engageable with parts of the valving members when the valving members are in their closed positions.

34. The prosthesis of claim 31 wherein:

each side member has a generally triangular shape.

35. The prosthesis of claim 31 wherein:

each valving member has a leading edge having a thickness about twice the thickness of the trailing edge, and generally flat side surfaces between the leading and trailing edges.

36. The prosthesis of claim 31 wherein:

each valving member is substantially balanced on its respective pivot means.

37. The prosthesis of claim 31 wherein:

each valving member has outer peripheral edges spaced from the inside wall to allow limited reverse flow of blood between the valving members and the base when the valving members are in the closed positions.

38. The prosthesis of claim 31 wherein:

the first valving member pivots about a first location offset from the center of the passage and the second valving member pivots about a second location offset from the center of the axis, said first and second locations being located on opposite sides of the center of the passage and extended generally parallel to each other.

39. The prosthesis of claim 38 wherein:

the side members are located between the first location and the second location.

40. A valving member for a heart valve prosthesis comprising:

a semi-elliptical shaped member having a convex curved leading edge, a transverse linear trailing edge, arcuate side edges connecting the opposite sides of the leading edge to opposite ends of the trailing edge and generally flat side surfaces extended from the leading edge to the trailing edge.

41. The valving member of claim 40 including:

pivot axles secured to opposite side edges of the member, said pivot axles located along a transverse pivot axis parallel to the linear trailing edge, said pivot axis being spaced from the midportions of the leading edge and trailing edge.

42. The valving member of claim 41 wherein:

the distance from the pivot axis to the midportion of the trailing edge is about twice the distance from the pivot axis to the midportion of the leading edge.

43. The valving member of claim 40 wherein:

said side surfaces taper toward each other from the leading edge to the trailing edge of the member.

44. The valving member of claim 40 including:

a pair of ears projected outwardly from separate portions of the side surfaces of the member, said ears being located adjacent opposite portions of the side edges of the member.

45. The valving member of the claim 44 wherein:

each ear has a trailing face extended generally parallel to the transverse linear edge of the member.

46. The valving member of claim 45 wherein:

the trailing faces of the ears are located along a line, said line being located generally a distance from the trailing edge that is twice the distance between the line and the midportion of the leading edge.

47. The valving member of claim 44 wherein:

each ear has an outwardly inclined ramp extended toward the trailing edge of the member.

48. A heart valve prosthesis comprising:

a base having an inside annular wall surrounding a passage for carrying blood through the base, means for connecting the base to heart tissue, said means including first means and second means for connecting the first means to heart tissue, and coacting means on the base and first means operable to permit removal of the base from the first means after the first means is connected to heart tissue, valving means for controlling the flow of blood through the passage, said valving means comprising a first valving member and a second valving member, first pivot means pivotally mounting the first valving member on the base, second pivot means pivotally mounting the second valving member on the base, and side members on the base projected in the direction of flow of blood through the passage, said side members having stop means engageable with the first and second valving members when said first and second valving members are in their closed positions.

49. The prosthesis of claim 48 wherein:

the first valving member and second valving member are inclined toward each other when in their closed positions.

50. The prosthesis of claim 49 wherein:

the inclination is about 45°

from the transverse plane of the passage.

51. The prosthesis of claim 48 wherein:

the stop means includes a pair of side projections located on opposite sides of the base, each projection having portions that are engaged by the members when the members are in their closed positions.

52. The prosthesis of claim 48 wherein:

the stop means comprise inclined and converging lip portions providing seats engageable with parts of the valving members when the valving members are in their closed positions.

53. The prosthesis of claim 48 including:

second stop means comprising projections extended from the base engageable with parts of the valving members when the valving members are in their open positions.

54. The prosthesis of claim 48 wherein:

each side member has a generally triangular shape.

55. The prosthesis of claim 48 wherein:

each valving member has a leading edge having a thickness about twice the thickness of the trailing edge, and generally flat side surfaces between the leading and trailing edges.

56. The prosthesis of claim 48 wherein:

each valving member is substantially balanced on its respective pivot means.

57. The prosthesis of claim 48 wherein:

each valving member has outer peripheral edges spaced from the inside wall to allow limited reverse flow of blood between the valving members and the base when the valving members are in the closed positions.

58. The prosthesis of claim 48 wherein:

the means for connecting the base to heart tissue includes a sleeve, and coacting means on the base and sleeve allowing the base to be removed from the sleeve after the means is connected to the heart tissue.

59. The prosthesis of claim 48 wherein:

the first valving member pivots about a first axis offset from the center of the passage and the second valving member pivots about a second axis offset from the center of the axis, said first and second axes being located on opposite sides of the center of the passage and extended generally parallel to each other.

60. The prosthesis of claim 59 wherein:

the side members are located between the first axis and the second axis.

61. A heart valve prosthesis comprising:

a base having a pair of semi-circular segments located in a circular arrangement, said segments having an inside annular wall forming a passage through the base, annular means surrounding the segments for holding the segments in the circular arrangement, valving means movable to open and closed positions for controlling the flow of blood through said passage, and means secured to the segments cooperating with the valving means to hold the valving means in assembled relation with the base and controlling the opening and closing movements of the valving means.

62. The prosthesis of claim 61 wherein:

the annular means is a circular sleeve having a plurality of holes, and said segments are provided with projections which extend into the holes.

63. The prosthesis of claim 62 wherein:

the valving means includes two valving members and the means secured to the segments are pairs of pivot members cooperating with the valving members to hold the valving member on the base.

64. The prosthesis of claim 62 wherein:

each segment has two pairs of pivot members, one pair cooperating with one valving member and the other pair cooperating with the second valving member whereby each valving member is controlled by two pairs of pivot members.