Interventional systems and associated devices and methods
According to some embodiments, the present technology includes device for removing obstructive material from a blood vessel lumen. For example, the device can comprise an elongated member, a cutting portion carried by a distal region of the elongated member, and a capture portion carried by the distal region of the elongated member. The cutting portion can comprise a blade configured to separate at least a portion of the obstructive material from the blood vessel wall, and the capture portion can comprise a mesh structure configured to enmesh and/or capture at least a portion of the obstructive material.
1. A device for modifying and/or removing obstructive material from a lumen of a blood vessel, the device comprising:
an elongated member having a proximal portion and a distal portion configured to be intravascularly positioned at a treatment site in a blood vessel adjacent obstructive material;
a cutting portion disposed at the distal portion of the elongated member, the cutting portion including a cutting element, wherein the cutting portion has a collapsed, low-profile state for delivery to the treatment site and a deployed state for cutting obstructive material at the treatment site, and wherein the cutting element extends radially away from a longitudinal axis of the elongated member in the deployed state; and
a capturing portion disposed at the distal portion of the elongated member, wherein the capturing portion is configured to collect obstructive material that has been dislodged by the cutting portion,
wherein the elongated member comprises a first elongated member and a second elongated member, and wherein the cutting portion is disposed at a distal portion of the first elongated member and the capturing portion is disposed at a distal portion of the second elongated member, and
wherein the second elongated member is configured to be slidably disposed within a lumen of the first elongated member.
2. The device of claim 1 , wherein the capturing portion is positioned distal of the cutting portion along the elongated member.
3. The device of claim 1 , wherein the capturing portion is self-expandable.
4. The device of claim 1 , wherein the first and second elongated members are configured to rotate and/or translate relative to one another.
5. The device of claim 1 , wherein the cutting portion comprises a blade disposed along a portion of the cutting element.
6. The device of claim 5 , wherein the blade is disposed along only a proximally facing surface of the cutting element.
7. The device of claim 1 , wherein a cutting edge of the cutting element is substantially linear.
8. The device of claim 1 , wherein the cutting element wraps around the longitudinal axis of the shaft elongated member.
9. The device of claim 1 , wherein the cutting element is a first cutting element and the device further comprises a second cutting element that is configured to extend radially away from the longitudinal axis of the elongated member in the deployed state.
10. The device of claim 9 , wherein an angle between the first and second cutting elements in the deployed state is less than 180 degrees.
11. The device of claim 9 , wherein an angle between the first and second cutting elements in the deployed state is from about 135 degrees to about 180 degrees.
12. The device of claim 1 , wherein the capturing portion and the cutting portion are independently deployable.
13. The device of claim 1 , wherein the capturing portion comprises has a closed distal end portion and an open proximal end portion.
14. The device of claim 1 , wherein the capturing portion comprises a mesh.
15. The device of claim 1 , wherein the capturing portion has a first region comprising a braid and a second region comprises a stent.
16. The device of claim 1 , wherein, in the deployed state, the cutting element has a proximally facing portion and a distally facing portion, and wherein a sharpened edge of the cutting element is disposed along only the proximally facing portion.
17. The device of claim 1 , wherein, in the deployed state, the cutting element has a proximally facing portion and a distally facing portion, and wherein a sharpened edge of the cutting element is disposed along only the distally facing portion.