초록 ▼

A magnetic coupling for connecting a cannula to the apex of a ventricle comprising a first member having a first orifice, a first magnetic material attached to the first member, a means for attaching a cannula to the first member, a second member having a second orifice, a second magnetic material a

A magnetic coupling for connecting a cannula to the apex of a ventricle comprising a first member having a first orifice, a first magnetic material attached to the first member, a means for attaching a cannula to the first member, a second member having a second orifice, a second magnetic material attached to the second member, a means for attaching the second member to a ventricle, so that when the first magnet is placed in proximity to the second magnet the first member and second member are held substantially concentric by magnetic force to allow for the communication of fluid between the first and second orifices.

대표청구항 ▼

1. An angularly orientable magnetic connector system for attaching a cannula to a heart for passing blood into or from a chamber within the heart, the magnetic connector system, comprising: a first member having an inflow tip at a proximal end, a distal end and a first orifice;a second member having

1. An angularly orientable magnetic connector system for attaching a cannula to a heart for passing blood into or from a chamber within the heart, the magnetic connector system, comprising: a first member having an inflow tip at a proximal end, a distal end and a first orifice;a second member having a second orifice sized to receive the inflow tip of the first member therethrough;a first magnetic material attached to the first member intermediate the inflow tip and the distal end and having an opening aligned with the first orifice of the first member;a second magnetic material attached to the second member and having an opening, such that the opening of the first magnetic material attached to the first member is aligned with the opening of the second magnetic material attached to the second member and the first magnetic material attached to the first member is magnetically attracted to the second magnetic material attached to the second member upon receiving the inflow tip of the first member through and beyond the second orifice of the second member; anda flexible attachment ring secured at a central opening in the attachment ring to the second member for attaching the second member to an exterior wall of the heart;wherein the inflow tip of the first member is insertable in, and then magnetically securable beyond, the second orifice of the second member using a single hand;wherein insertion of the inflow tip of the first member into the second orifice of the second member guides the first magnetic material attached to the first member to a magnetically coupled position proximal to and aligned with the second magnetic material of the second member;wherein the inflow tip of the first member is angularly orientable relative to the attachment ring of the second member after the attachment ring is attached to the heart by rotation of the first member about an axis through the first orifice; andwherein unwanted twists in a flexible cannula connected to the distal end of the first member can be eliminated by angularly orienting the first member, to which the cannula is connected, relative to the second member. 2. The magnetic connector system of claim 1, wherein the first member comprises: a flange intermediate the inflow tip and the distal end of the first member and extending radially outwardly from the first member. 3. The magnetic connector system of claim 2, wherein the first magnetic material is embedded within the flange on the first member. 4. The magnetic connector system of claim 2, wherein the second member comprises: a flange extending radially outwardly from the second member. 5. The magnetic connector system of claim 1, further comprising: a sealing member between an exterior surface of the first member and the second orifice of the second member. 6. The magnetic connector system of claim 1, wherein the flexible attachment ring for attaching the second member to the exterior wall of the heart comprises a sewing ring. 7. The magnetic connector system of claim 1, further comprising: one or more circumferential grooves in an exterior surface of the distal portion of the first member for sealably attaching the cannula to the distal portion of the first member. 8. The magnetic connector system of claim 1, further comprising: a balloon catheter for passing through the orifice of the second member and into the heart; anda positioner, including a positioner magnet disposed on a portion of the balloon catheter for cooperating with the second magnetic material attached to the second member and for thereby positioning the balloon catheter relative to the second member. 9. The magnetic connector system of claim 1, further comprising: a plug, including a magnetic material that is attracted to the second magnetic material of the second member, and substantially occluding a hole in the heart when the first member is removed from the second member and the plug is received within and magnetically coupled to the second member. 10. The magnetic connector system of claim 1, further comprising: a flux shield to alter a magnetic field produced by the second magnetic material of the second member to reduce the magnetic force imparted to metal objects positioned adjacent to the second magnetic material. 11. An orientable magnetic connector system for attaching a cannula to a heart for passing blood into or from a chamber of the heart, comprising: a hollow tube having an inflow tip at a proximal end and a distal end, a first outer diameter and a raised circumferential abutment intermediate the inflow tip and the distal end and having a second outer diameter that is greater than the first outer diameter of the hollow tube;a first member ring with a first orifice having a diameter that is greater than the first outer diameter of the hollow tube but less than the second outer diameter of the raised circumferential abutment of the hollow tube;a first magnetic material having an opening and attached to the first member ring with the opening aligned with the first orifice of the first member ring and with the opening of the first magnetic material having a diameter that is greater than the first outer diameter of the hollow tube;a second member with a second orifice having, a diameter that is greater than the first outer diameter of the inflow tip of the hollow tube;a second magnetic material having an opening that is larger than the diameter of the inflow tip of the hollow tube and attached to the second member with the opening of the second magnetic material aligned with the second orifice of the second member; andan attachment member for attaching the second member to an exterior wall of the heart;wherein the inflow tip of the hollow tube is insertable in, and then magnetically securable at a position beyond, the second orifice of the second member using a single hand;wherein insertion of the inflow tip of the hollow tube into the second orifice of the second member guides the first magnetic material attached to the first member ring to a magnetically coupled position proximal to and aligned with the second magnetic material of the second member;wherein the inflow tip of the hollow tube is angularly orientable relative to the attachment ring of the second member after the attachment ring is attached to the heart; andwherein unwanted twists in a flexible cannula connected to the distal end of the hollow low tube can be eliminated by angularly orienting the hollow tube to which the cannula is connected relative to the second member. 12. The magnetic connector system of claim 11, further comprising: a seal between the abutment of the hollow tube and the second member. 13. The magnetic connector system of claim 11, further comprising: a balloon catheter insertable into a chamber of the heart and having flow bore through which contrast dye may flow; anda positioner, including a positioner hole, to receive and align the balloon catheter and to provide for translation of the positioner over the balloon catheter, and a positioner magnet for cooperating with the second magnetic material attached to the second member and to retain the balloon catheter in a position aligning the positioner magnet with the second magnetic material. 14. The magnetic connector system of claim 11, wherein the first magnetic material is embedded in the first member ring. 15. The magnetic connector system of claim 11, further comprising: a plug including a magnetic material that is attracted to the second magnetic material of the second member, the plug substantially occluding a hole in the heart when the first member is removed from the second member and the plug is magnetically coupled to the second member. 16. The magnetic connector system of claim 11, further comprising: a flux shield to alter a magnetic field produced by the second magnetic material of the second member to reduce the magnetic force imparted to metal objects positioned adjacent to the second magnetic material. 17. A method of connecting a cannula to a chamber of a heart, the method comprising: providing a first member having a hollow tube with an inflow tip, a distal end, a first orifice and a first flange;providing a second member having a second orifice, an attachment ring and a second flange;attaching a first magnetic material to the first member proximal to the first flange of the first member;attaching a second magnetic material to the second member and proximal to the second flange of the second member such that the first magnetic material proximal to the first flange of the first member is magnetically attracted to the second magnetic material proximal to the second flange of the second member upon alignment of the first magnetic material with the second magnetic material;attaching the attachment ring of the second member to an exterior wall a heart using ligatures;using a single hand to introduce the inflow tip of the first member into the second orifice in the second member to align the first magnetic material attached to the first member with the second magnetic material attached to the second member to cause the first magnetic material of the first member to be magnetically attracted to the second magnetic material of the second member;translating the inflow tip of the first member through the second orifice of the second member to move the first flange of the first member to engage the second flange of the second member and to position the first magnetic material in close proximity to the second magnetic material;connecting a proximal end of a cannula to the distal end of the first member; andflowing a fluid through the cannula, the first orifice of the first member and the inflow tip. 18. The method of claim 17, further comprising: passing an inflatable balloon catheter, having a collapsed configuration and an inflated configuration the size of the portion of the first member intermediate the inflow tip and the first flange, into a chamber of the heart and through the second orifice of the second member and into the heart;providing a positioner including a positioner hole, for receiving the proximal end of the balloon catheter and for providing translation of the positioner over the balloon catheter, and a positioner magnet, for magnetically cooperating with the second magnetic material of the second member and for thereby positioning the second member relative to the balloon catheter;introducing a volume of radiopaque material into the balloon catheter to inflate the balloon catheter from the collapsed configuration to the inflated configuration; andusing a radiation generating device to view the profile of the inflated balloon catheter to detect its position within the chamber of the heart relative to surrounding structures;attaching the second member to the positioner by magnetic cooperation of the positioner magnet and second magnetic material;inserting the proximal end of the balloon catheter into the positioner hole of the positioner; andadvancing the positioner along the balloon catheter until the second member reaches the surface of the heart, thereby aligning the second member with the balloon catheter. 19. The method of claim 18, further comprising: inflating the balloon catheter to a predetermined shape corresponding to the portion of the first member inserted through the second orifice. 20. The method of claim 17, further comprising: providing a plug including a magnetic material that is magnetically attracted to the second magnetic material of the second member;removing the first member from engagement with the second member; andengaging the plug with the second member to occlude the second orifice of the second member to prevent flow through a hole in the heart wall adjacent to the second member.