Catheter of a heart pump shaped for anatomic fit
A heart pump assembly, also referred to as catheter assembly, having a desired anatomical shape is provided. The catheter assembly can include a catheter and a cannula having a bend between a proximal portion and a distal portion. A resting shape of the catheter and the cannula can be selected to allow the distal cannula portion to be positioned at a desired angle relative to an anatomical plane (e.g., a plane of an aortic arch). In some embodiments, a packaging tray can be designed to set the catheter assembly in a desired resting shape. For example, the proximal cannula portion can be positioned at a first angle relative to the catheter, and the proximal cannula portion can be positioned at a second angle out of the plane of the packaging tray via one or more inserts.
1. A catheter assembly of a heart pump comprising:
a catheter including a proximal catheter portion and a distal catheter portion; and
a cannula coupled to the distal catheter portion, the cannula having a proximal cannula portion and a distal cannula portion extending from a pre-formed bend between the proximal cannula portion and the distal cannula portion, the proximal cannula portion including a blood pump outlet and the distal cannula portion including a blood pump inlet;
wherein, the catheter assembly as formed has a predetermined shape when in a resting state,
wherein, the predetermined shape is configured such that, in the resting state:
the catheter has a pre-formed curve encompassing the distal catheter portion and at least a portion of the proximal catheter portion;
the proximal cannula portion and the pre-formed curve of the catheter define a first plane, and
the pre-formed curve of the catheter is configured such that the distal cannula portion extends out of the first plane at an angular offset relative to the first plane, wherein the angular offset is approximately equal to an angle between:
(a) a second plane representative of a plane of an aortic arch defined by an ascending portion of an aorta and a descending portion of the aorta, and
(b) a third plane representative of a plane of the ascending portion of the aorta and an apex of a left ventricle of a patient's heart.
2. The catheter assembly of claim 1 , wherein the angular offset is between 64° and 125°.
3. The catheter assembly of claim 2 , wherein the angular offset is 92°.
4. The catheter assembly of claim 1 , further comprising a stylet inserted into the catheter to adjust a shape of the distal catheter portion.
5. The catheter assembly of claim 1 , further comprising a catheter handle connected to the proximal catheter portion and rotated to adjust a position of the distal catheter portion.
6. The catheter assembly of claim 1 , further comprising a steering mechanism connected to the proximal catheter portion and configured to adjust a position of the distal catheter portion after insertion.
7. The catheter assembly of claim 1 , wherein the catheter assembly includes an inner polyamide layer and an outer polyurethane layer.
8. The catheter assembly of claim 1 , wherein the pre-formed bend between the proximal cannula portion and the distal cannula portion is an apex of the angular offset.
9. The catheter assembly of claim 1 , wherein the pre-formed curve is a plane curve.
10. The catheter assembly of claim 1 , wherein, when the catheter assembly is inserted through the aorta of the patient, the angular offset is configured to bias the distal cannula portion toward the apex of the left ventricle of the patient's heart and away from chordae that actuate a mitral valve of the left ventricle.