Endovascular valve formation system with imaging capability
Endovascular valve formation systems with imaging capabilities and associated devices and methods are disclosed herein. In some embodiments, a valve formation and imaging system can include, for example, (i) a valve formation device configured to access a vessel wall and dissect a portion of the vessel wall to form an autologous valve leaflet and (ii) an imaging device configured to image the vessel wall and components of the valve formation device during a valve formation procedure. In some embodiments, the imaging device is integrated into a distal end portion of the valve formation device. In some embodiments, the imaging device is a separate catheter device positionally coupled to the valve formation device and/or components thereof.
1. A tissue manipulation and imaging device, comprising:
a handle assembly having a first state and a second state;
a catheter shaft having a proximal end portion coupled to the handle assembly and a distal end portion;
an end effector assembly at the distal end portion of the catheter shaft, wherein the end effector assembly comprises:
a tissue access component configured to manipulate tissue within a vessel wall, and
a tissue dissection component configured to slide over the tissue access component;
an imaging transducer at the distal end portion of the catheter shaft and movable along a length of the distal end portion of the catheter shaft independent of the tissue access component, wherein:
while in the first state, the imaging transducer is positioned coupled to the tissue access component at the handle assembly such that the imaging transducer moves together with the tissue access component, and
while in the second state, the imaging transducer is positionally coupled to the tissue dissection component such that the imaging transducer moves together with the tissue dissection; and
one or more position sensors coupled to the handle assembly and configured to determine positions of a distal end portion of the tissue access component relative to the end effector assembly.
2. The tissue manipulation and imaging device of claim 1 wherein the end effector assembly is a valve formation assembly configured to access the vessel wall and dissect a portion of the vessel wall to form an autologous valve leaflet.
3. The tissue manipulation and imaging device of claim 1 wherein:
the end effector assembly comprises a trough section; and
the imaging transducer is embedded in the trough section.
4. The tissue manipulation and imaging device of any of claim 1 wherein the imaging transducer comprises a moveable transducer shaft and a transducer positioned at a distal end of the transducer shaft, and wherein the transducer shaft is configured to translate the transducer along a length of the distal end portion.
5. The tissue manipulation and imaging device of claim 4 , further comprising a position sensor coupled to the transducer shaft and positioned in the handle assembly, wherein the position sensor is configured to detect location data of the transducer relative to the end effector assembly.
6. The tissue manipulation and imaging device of claim 1 wherein:
the end effector assembly further comprises a trough section having a plurality of windows;
the imaging transducer comprises a plurality of transducer chips embedded in the corresponding plurality of windows and configured to be selectively activated depending upon stages in valve formation procedure and positions of components of the end effector assembly.
7. The tissue manipulation and imaging device of claim 1 wherein
the tissue dissection component is configured to slide over the tissue access component.
8. The tissue manipulation and imaging device of claim 1 wherein:
the end effector assembly further comprises a tissue dissection component configured to slide over the tissue access component, the tissue dissection component having an outer member, an inner member slideably received and coupled to the outer member, and a plurality of expandable arms on the outer member, wherein the plurality of expandable arms are configured to project radially outwardly from the inner member when the inner member moves proximally relative to the outer member;
the imaging transducer is a first imaging transducer; and
the tissue manipulation and imaging device further comprises a second transducer
integrated into the inner member of the tissue dissection component.
9. The tissue manipulation and imaging device of claim 1 wherein:
the end effector assembly further comprises a tissue dissection component configured to slide over the tissue access component, the tissue dissection component having an outer member, an inner member slideably received and coupled to the outer member, and a plurality of expandable arms on the outer member, wherein the plurality of expandable arms are configured to project radially outwardly from the inner member when the inner member moves proximally relative to the outer member;
the imaging transducer is a first imaging transducer; and
the tissue manipulation and imaging device further comprises a plurality of second transducers coupled to the corresponding plurality of expandable arms on the tissue dissection component.
10. The tissue manipulation and imaging device of claim 1 wherein:
the end effector assembly further comprises a tissue dissection component configured to slide over the tissue access component, the tissue dissection component comprising a shaft and an expandable balloon at a distal end of the shaft;
the imaging transducer is a first imaging transducer; and
the tissue manipulation and imaging device further comprises a second imaging transducer integrated into the shaft of the tissue dissection component.