Catheter tubular support
A clot retrieval catheter can have a tailored, highly flexible body section capable of navigating tortuous routes and an expandable tip for local flow restriction/arrest. The body can be a support tube of struts with a plurality of ribs and one or more axial spines. The support tube can also be a tubular section with a pattern of radial slots to increase flexibility while inhibiting kinking and binding. The ribs and spines can have strut widths which vary along the length of the support tube or can have curves with a non-planar cross section. The ribs can be formed such that they can move when subjected to the loads of a thrombectomy procedure. The structure of the support tube can also be a braided or woven pattern of strands. The support tube can also have a polymer jacket or membrane disposed around at least a portion of the structure.
1. A tube forming the body of a catheter assembly, the tube comprising:
a tubular support framework comprising a proximal end, a distal end, and a longitudinal axis, the support framework comprising:
one or more spines each being formed as a continuous spine disposed in a configuration parallel to the longitudinal axis and extending longitudinally between the proximal end and the distal end;
a plurality of interlocking ribs disposed along a length of the one or more spines defining a lumen of the support framework extending therethrough;
at least one radial slot adjacent each of the plurality of interlocking ribs; and
a polymeric cover disposed around at least a portion of the support framework.
2. The tube of claim 1 , wherein at least one of the one or more spines has a proximal spine width different from a distal spine width between the proximal end and the distal end of the support framework.
3. The tube of claim 1 , wherein the widths of the radial slots vary between the proximal end and the distal end of the support framework.
4. The tube of claim 1 , wherein ends of the radial slots are aligned along the length of the one or more spines.
5. The tube of claim 1 , wherein at least one of the plurality of interlocking ribs has a first rib width different than a second rib width of another rib of the plurality of interlocking ribs.
6. The tube of claim 1 , wherein the radial slots are configured for bending of the support framework.
7. The tube of claim 1 , wherein the support framework is configured to bend or torque in multiple planes.
8. The tube of claim 1 , wherein the radial slots form a puzzle-cut pattern.
9. A tube forming the body of a catheter assembly, the tube comprising:
a tubular support framework comprising a proximal end, a distal end, an internal lumen, and a plurality of interlocking rings defining a pattern of radial slots configured around a longitudinal axis;
one or more spines each being formed as a continuous spine disposed in a configuration parallel to the longitudinal axis and extending longitudinally between the proximal end and the distal end; and
a polymeric cover disposed around at least a portion of the support framework.
10. The tube of claim 9 , wherein the radial slots form a puzzle-cut pattern.
11. The tube of claim 9 , wherein the interlocking rings are configured for bending of the support framework.