Direct manual cardiac compression device

Claims

What we claim is:

1. An apparatus for intra-thoracic direct substernal heart massage comprising:

(a) a heart-contacting member having a surface which is at least partially concave and cushioning means on substantially said entire surface, the member being adapted for insertion into a thoracic cavity for directly contacting the heart, the partially concave surface allowing the member to conform to the shape of the heart's surface, the cushioning means being of a deformable material and having a portion which generally conforms to the shape of the heart's surface, and

(b) a handle attached to the heart-contacting member for manually manipulating the apparatus, the heart-contacting member having a plane tangential to the member's surface in a region where the handle is attached to the heart-contacting member, the handle being substantially upright with respect to the plane, the handle thereby adapted to impart downward forces to the heart-contacting member, wherein the handle comprises first and second telescoping tubes.

2. An apparatus for substernal heart massage according to claim 1, wherein said handle further comprises means for limiting axial movement of said first and second tubes relative to each other.

3. An apparatus for substernal heart massage according to claim 1, wherein said handle further comprises a shock absorber disposed in one of said tubes.

4. An apparatus for substernal heart massage according to claim 1, wherein said handle further comprises means for releasably engaging said first and second tubes to allow unison movement thereof.

5. An apparatus for substernal heart massage according to claim 4, wherein said means for releasably engaging said first and second tubes further comprises resilient biasing means for releasing the engagement of said first and second tubes when the force applied to said tubes exceeds a predetermined limit.

6. An apparatus for substernal heart massage according to claim 5, wherein said handle further comprises means for indicating that said predetermined limit is exceeded.

7. An apparatus for intra-thoracic direct substernal heart massage comprising:

(a) a heart-contacting member having a surface which is at least partially concave and cushioning means on substantially said entire surface, the member being adapted for insertion into a thoracic cavity for directly contacting the heart, the partially concave surface allowing the member to conform to the shape of the heart's surface, the cushioning means being of a deformable material and having a portion which generally conforms to the shape of the heart's surface, and

(b) a handle attached to the heart-contacting member for manually manipulating the apparatus, the heart-contacting member having a plane tangential to the member's surface in a region where the handle is attached to the heart-contacting member, the handle being substantially upright with respect to the plane, the handle thereby adapted to impart downward forces to the heart-contacting member, wherein said handle is a hollow cylinder.

8. An apparatus for substernal heart massage according to claim 7, wherein said heart-contacting member comprises a generally curved plate.

9. An apparatus for substernal heart massage according to claim 7, further comprising a rough-surfaced pad covering the cushioning means for inhibiting the heart-contacting member from slipping on the heart's surface when the cushioning means contacts the heart's surface.

10. An apparatus for substernal heart massage according to claim 7, wherein one dimension of said heart-contacting member is defined by two opposed edges, the distance between the two edges not exceeding about three inches.

11. An apparatus for substernal heart massage according to claim 7, further comprising at least one electrode disposed on the heart-contacting member for contacting the heart.

12. An apparatus for substernal heart massage according to claim 7, further comprising at least one sensor disposed on the heart-contacting member for contacting the heart.

13. An apparatus for substernal heart massage according to claim 7, wherein the concavity of the heart contacting member's surface is of a degree that allows the entire concave surface, including its edges, to contact the heart.

14. An apparatus for intra-thoracic direct substernal heart massage, comprising:

(a) a heart-contacting member having a solid surface which is at least partially concave and cushioning means on said surface, the member being adapted for insertion into a thoracic cavity for directly contacting the heart, the partially concave surface allowing the member to conform to the shape of the heart's surface, the cushioning means being of a deformable material and having a portion which generally conforms to the shape of the heart's surface, and

(b) a handle attached to the heart-contacting member for manually manipulating the apparatus, the heart-contacting member having a plane tangential to the member's surface in a region where the handle is attached to the heart-contacting member, the handle being substantially upright with respect to the plane, the handle thereby adapted to impart downward forces to the heart-contacting member wherein the handle further comprises first and second telescoping tubes.

15. An apparatus for substernal heart massage according to claim 14, wherein the handle comprises an elongated rod attached at one end thereof to the heart-contacting member.

16. An apparatus for substernal heart massage according to claim 15, further comprising grip means at an end of the rod opposite the end attached to the heart-contacting member.

17. An apparatus for substernal heart massage according to claim 14, wherein said handle further comprises means for limiting axial movement of said first and second tubes relative to each other.

18. An apparatus for substernal heart massage according to claim 14, wherein said handle further comprises a shock absorber disposed in one of said tubes.

19. An apparatus for substernal heart massage according to claim 14, wherein said handle further comprises means for releasably engaging said first and second tubes to allow unison movement thereof.

20. An apparatus for substernal heart massage according to claim 19, wherein said means for releasably engaging said first and second tubes further comprises resilient biasing means for releasing the engagement of said first and second tubes when the force applied to said tubes exceeds a predetermined limit.

21. An apparatus for substernal heart massage according to claim 20, wherein said handle further comprises means for indicating that said predetermined limit is exceeded.

22. An apparatus for intra-thoracic direct substernal heart massage comprising:

(a) a heart-contacting member having a solid surface which is at least partially concave and cushioning means on said surface, the member being adapted for insertion into a thoracic cavity for directly contacting the heart, the partially concave surface allowing the member to conform to the shape of the heart's surface, the cushioning means being of a deformable material and having a portion which generally conforms to the shape of the heart's surface, and

(b) a handle attached to the heart-contacting member for manually manipulating the apparatus, the heart-contacting member having a plane tangential to the member's surface in a region where the handle is attached to the heart-contacting member, the handle being substantially upright with respect to the plane, the handle thereby adapted to impart downward forces to the heart-contacting member wherein said handle is a hollow cylinder.

23. An apparatus for substernal hear massage according to claim 14, wherein said heart-contacting member comprises a generally curved plate.

24. An apparatus for substernal heart massage according to claim 14, further comprising a rough-surfaced pad covering the cushioning means for inhibiting the heart-contacting member from slipping on the heart's surface when the cushioning means contacts the heart's surface.

25. An apparatus for substernal heart massage according to claim 14, wherein one dimension of said heart-contacting member is defined by two opposed edges, the distance between the two edges not exceeding about three inches.

26. An apparatus for substernal heart massage according to claim 14, further comprising at least one electrode disposed on the heart-contacting member for contacting the heart.

27. An apparatus for substernal heart massage according to claim 14, further comprising at least one sensor disposed on the heart-contacting member for contacting the heart.

28. An apparatus for substernal heart massage according to claim 14, wherein the concavity of the heart contacting member's surface is of a degree that allows the entire concave surface, including its edges, to contact the heart.

29. An apparatus for intra-thoracic direct substernal heart massage, comprising:

(a) a heart-contacting member having a surface which is at least partially concave and cushioning means on said surface, the member being adapted for insertion into a thoracic cavity for directly contacting the heart, the partially concave surface allowing the member to conform to the shape of the heart's surface, the cushioning means being of a deformable material and having a portion which generally conforms to the shape of the heart's surface, and

(b) a handle attached to the heart-contacting member for manually manipulating the apparatus, the heart-contacting member having a plane tangential to the member's surface in a region where the handle is attached to the heart-contacting member, the handle being substantially upright with respect to the plane, the handle thereby adapted to impart downward forces to the heart-contacting member, the region where the handle attaches to the heart-contacting member being significantly offset from a central portion of the heart-contacting member wherein the handle comprises first and second telescoping tubes.

30. An apparatus for substernal heart massage according to claim 29, wherein the handle comprises an elongated rod attached at one end thereof to the heart-contacting member.

31. An apparatus for substernal heart massage according to claim 30, further comprising grip means at an end of the rod opposite the end attached to the heart-contacting member.

32. An apparatus for substernal heart massage according to claim 29, wherein said handle further comprises means for limiting axial movement of said first and second tubes relative to each other.

33. An apparatus for substernal heart massage according to claim 29, wherein said handle further comprises a shock absorber disposed in one of said tubes.

34. An apparatus for substernal heart massage according to claim 29, wherein said handle further comprises means for releasably engaging said first and second tubes to allow unison movement thereof.

35. An apparatus for substernal heart massage according to claim 34, wherein said means for releasably engaging said first and second tubes further comprises resilient biasing means for releasing the engagement of said first and second tubes when the force applied to said tubes exceeds a predetermined limit.

36. An apparatus for substernal heart massage according to claim 35, wherein said handle further comprises means for indicating that said predetermined limit is exceeded.

37. An apparatus for intra-thoracic direct substernal heart massage comprising:

a) a heart-contacting member having a surface which is at least partially concave and cushioning means on said surface, the member being adapted for insertion into a thoracic cavity for directly contacting the heart, the partially concave surface allowing the member to conform to the shape of the heart's surface, the cushioning means being of a deformable material and having a portion which generally conforms to the shape of the heart's surface, and

(b) a handle attached to the heart-contacting member for manually manipulating the apparatus, the heart-contacting member having a plane tangential to the member's surface in a region where the handle is attached to the heart-contacting member, the handle being substantially upright with respect to the plane, the handle thereby adapted to impart downward forces to the heart-contacting member, the region where the handle attaches to the heart-contacting member being significantly offset from a central portion of the heart-contacting member, wherein said handle is a hollow cylinder.

38. An apparatus for substernal heart massage according to claim 37, wherein said heart-contacting member comprises a generally curved plate.

39. An apparatus for substernal heart massage according to claim 37, further comprising a rough-surfaced pad covering the cushioning means for inhibiting the heart-contacting member from slipping on the heart's surface when the cushioning means contacts the heart's surface.

40. An apparatus for substernal heart massage according to claim 37, wherein one dimension of said heart-contacting member is defined by two opposed edges, the distance between the two edges not exceeding about three inches.

41. An apparatus for substernal heart massage according to claim 37, further comprising at least one electrode disposed on the heart-contacting member for contacting the heart.

42. An apparatus for substernal heart massage according to claim 37, further comprising at least one sensor disposed on the heart-contacting member for contacting the heart.

43. An apparatus for substernal heart massage according to claim 37, wherein the concavity of the heart contacting member's surface is of a degree that allows the entire concave surface, including its edges, to contact the heart.