Multi-lumen cannula
First Claim
1. An improved multi-lumen cannula for conducting fluid to and from a body comprising a first lumen having a proximal end, a distal end, and a first and second fluid apertures spaced from one another, and a second lumen having a proximal end, a distal end and first and second fluid apertures spaced from one another, the improvement comprising:
- septum separating the first and second lumens wherein the septum is wire reinforced to resist deflection of the septum.
1 Assignment
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Accused Products
Abstract
The multi-lumen cannula according to the invention is preferably formed from two separate sub-cannulas, a portion of which are adhered to one another. Preferably, the adhered portions of the sub-cannulas are deformed such that the assembled multi-lumen cannula is substantially circular in cross section throughout the adhered portions of the sub-cannulas. In addition, the septum separating the multiple lumens of the cannula is preferably reinforced so that the multi-lumen cannula can accommodate dramatically different fluid pressure within the cannula without deformation of the septum. This cannula is ideally suited for use in a variety of left-heart and right-heart assist cardiac surgical procedures, especially minimally invasive procedures.
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Citations
82 Claims
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1. An improved multi-lumen cannula for conducting fluid to and from a body comprising a first lumen having a proximal end, a distal end, and a first and second fluid apertures spaced from one another, and a second lumen having a proximal end, a distal end and first and second fluid apertures spaced from one another, the improvement comprising:
septum separating the first and second lumens wherein the septum is wire reinforced to resist deflection of the septum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multi-lumen cannula assembly comprising:
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a first sub-cannula comprising a proximal end, a distal end, a lumen extending between the proximal and distal ends, proximal and distal fluid apertures formed in the lumen, and reinforcement to resist radial deflection of the lumen; a second sub-cannula comprising a proximal end, a distal end, a lumen extending between the proximal and distal ends, and proximal and distal fluid apertures formed in the lumen, a portion of the first sub-cannula being adhered to a portion of the second sub-cannula to create a septum separating the lumens of the first and second sub-cannulas, wherein the reinforcement of the lumen of the first sub-cannula resists deflection of the septum as a result of differing fluid pressure levels inside the lumens. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A multi-lumen cannula assembly comprising:
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a first sub-cannula comprising a proximal end, a distal end, a lumen extending between the proximal and distal ends, proximal and distal fluid apertures formed in the lumen, a portion of the first sub-cannula being circular in cross section and another portion being non-circular; a second sub-cannula comprising a proximal end, a distal end, a lumen extending between the proximal and distal ends, and proximal and distal fluid apertures formed in the lumen, a portion of the second sub-cannula being circular in cross section and another portion being non-circular, the non-circular portion of the first sub-cannula being adhered to the non-circular portion of the second sub-cannula wherein the cross section of the adhered portions of the first and second sub-cannulas is substantially circular. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of assisting fluid flow in the cardiovascular system comprising the steps of:
providing a multi-lumen cannula comprising; a first sub-cannula comprising a proximal end, a distal end, a lumen extending between the proximal and distal ends, and proximal and distal fluid apertures formed in the lumen, a portion of the first sub-cannula being circular in cross section and another portion being non-circular; and a second sub-cannula comprising a proximal end, a distal end, a lumen extending between the proximal and distal ends, and proximal and distal fluid apertures formed in the lumen, a portion of the second sub-cannula being circular in cross section and another portion being non-circular, wherein the distal fluid apertures of the two lumens are spaced from one another along the axial length of the multi-lumen cannula and the non-circular portion of the first sub-cannula is adhered to the non-circular portion of the second sub-cannula so that the cross section of the adhered portions of the first and second sub-cannulas is substantially circular; inserting the cannula into the vasculature system of a patient so that the distal fluid aperture of the lumen of the first sub-cannula is received in one of a first chamber of the heart or vessel fluidly communicating with the heart and the distal fluid aperture of the lumen of the second sub-cannula is received in one of a second chamber of the heart or vessel fluidly communicating with the heart; and fluidly connecting the proximal fluid apertures of the first and second sub-cannulas to a fluid conducting pump for moving fluid through the two sub-cannulas. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method of forming a multi-lumen cannula comprising the steps of:
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providing a first sub-cannula having a proximal end, a distal end, a lumen extending between the proximal and distal ends, and proximal and distal fluid apertures formed in the lumen, the first sub-cannula being substantially circular in cross section; providing a second sub-cannula having a proximal end, a distal end, a lumen extending between the proximal and distal ends, and proximal and distal fluid apertures formed in the lumen, the second sub-cannula being substantially circular in cross section deforming a portion of the first sub-cannula to create a non-circular portion; deforming a portion of the second sub-cannula to create a non-circular portion; adhering the non-circular portions of the first and second sub-cannulas to one another.
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43. An improved multi-lumen cannula for conducting fluid to and from a body comprising a first lumen having a proximal end, a distal end, and a first and second fluid apertures spaced from one another, and a second lumen having a proximal end, a distal end and first and second fluid apertures spaced from one another, the improvement comprising:
a septum separating the first and second lumens wherein the septum is reinforced to resist deflection of the septum, wherein both the first and second lumens are reinforced so that the septum separating the two lumens has greater reinforcement and resistance to deflection as compared to either of the lumens. - View Dependent Claims (44, 45, 46, 47, 49, 50, 51, 52)
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48. An improved multi-lumen cannula according to clam 43 wherein one of said two fluid apertures for each of the first and second lumens are spaced from one another along the axial length of the multi-lumen cannula.
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53. An improved multi-lumen cannula for conducting fluid to and from a body comprising a first lumen having a proximal end, a distal end, and a first and second fluid apertures spaced from one another, and a second lumen having a proximal end, a distal end and first and second fluid apertures spaced from one another, the improvement comprising:
a septum separating the first and second lumens wherein the septum is reinforced to resist deflection of the septum, wherein one of said two fluid apertures for each of the first and second lumens are positioned adjacent one another along the axial length of the multi-lumen cannula. - View Dependent Claims (54, 55, 56, 57, 59, 60, 61, 62)
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58. An improved multi-lumen cannula according to clam 53 wherein one of said two fluid apertures for each of the first and second lumens are spaced from one another along the axial length of the multi-lumen cannula.
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63. An improved multi-lumen cannula for conducting fluid to and from a body comprising a first lumen having a proximal end, a distal end, and a first and second fluid apertures spaced from one another, and a second lumen having a proximal end, a distal end and first and second fluid apertures spaced from one another, the improvement comprising:
a septum separating the first and second lumens wherein the septum is reinforced to resist deflection of the septum, wherein one of said two fluid apertures for each of the first and second lumens are spaced from one another along the axial length of the multi-lumen cannula. - View Dependent Claims (64, 65, 66, 67, 68, 69, 70, 71, 72)
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73. An improved multi-lumen cannula for conducting fluid to and from a body comprising a first lumen having a proximal end, a distal end, and a first and second fluid apertures spaced from one another, and a second lumen having a proximal end, a distal end and first and second fluid apertures spaced from one another, the improvement comprising:
a septum separating the first and second lumens wherein the septum is reinforced to resist deflection of the septum, wherein only a portion of the first and second lumens are adhered to one another and the remainder of the first and second lumens are free relative to one another. - View Dependent Claims (74, 75, 76, 77, 78, 80, 81, 82)
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79. An improved multi-lumen cannula according to clam 73 wherein one of said two fluid apertures for each of the first and second lumens are spaced from one another along the axial length of the multi-lumen cannula.
Specification