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Publication Number
US-12201506-B2
Publication Date
2025-01-21
Expiration Date
Abstract
A thrombus engagement tool having a flexible shaft, a clot engagement tip, and a handle. The engagement tip may include one or more radially outwardly extending structures such as a helical thread. The helical thread can be advanced through a catheter to engage a clot. The handle may be configured to be rotated by hand. When the handle is rotated, the helical thread of the engagement tip can rotate in the same direction thereby allowing the helical threat to engage the clot. The helical thread can wrap around the flexible shaft at least about one, two, or four or more full revolutions, but in some cases no more than about ten or no more than about six revolutions.
Core Innovation
The disclosure describes a thrombus engagement tool configured to be advanced through a catheter and to engage thrombus. The thrombus engagement tool includes a rotatable core with a distal portion and a thrombus engagement tip secured to the distal portion of the rotatable core, where the thrombus engagement tip comprises a helical thread supported by and wrapped around the rotatable core, including an advance segment on a distal side of the helical thread and a trailing segment on a proximal side of the helical thread.
Manual rotation causes the helical thread to engage clots, and the helical-thread tip is configured for multiple revolutions and is advanced relative to the catheter. The helical thread provides aspiration via annular and helical flow paths by maintaining a thread outer diameter smaller than the catheter lumen, and includes options such as an atraumatic tapered advance segment, radiopaque markers, and a position indicator/limit features to control distal extension relative to the catheter.
The disclosure also describes clot capture and aspiration flow-control modules that include a transparent window and a filter, and an aspiration control valve having a normally closed vent and vacuum control to improve aspiration response and allow visualization of captured thrombus. A clot capture chamber is housed in a housing and includes incoming and outgoing flow paths, with a vent valve and a vacuum canister/pump arrangement used for aspiration control while permitting visualization through the transparent window.
Claims Coverage
The independent claims cover a family of thrombus engagement tools advanced through a catheter to engage thrombus, with three principal inventive feature sets: a rotatable helical-thread tip with advance and trailing segments and a distal projection limiting handle; a rotatable helical-thread tip with a position indicator carried by the rotatable core; and a rotatable helical-thread tip with both a position indicator and radiopaque markers under the advance and trailing segments.
Rotatable helical-thread thrombus engagement tip with trailing and advance segments and distal projection limiting handle
A thrombus engagement tool configured to be advanced through a catheter and to engage thrombus, comprising a rotatable core having a distal portion; a thrombus engagement tip secured to the distal portion of the rotatable core; the thrombus engagement tip comprising a helical thread supported by and wrapped around the rotatable core, an advance segment on a distal side of the helical thread, and a trailing segment on a proximal side of the helical thread; a handle on the proximal end of the rotatable core; and a limit bearing surface on the handle configured to limit projection of the thrombus engagement tip in a distal direction relative to a distal end of the catheter.
Position indicator carried by the rotatable core for a helical-thread thrombus engagement tip
A thrombus engagement tool configured to be advanced through a catheter and to engage thrombus, comprising a rotatable core having distal portion; a thrombus engagement tip secured to the distal portion of the rotatable core, the thrombus engagement tip comprising a helical thread supported by and wrapped around the rotatable core, an advance segment on a distal side of the helical thread, and a trailing segment on a proximal side of the helical thread; and a position indicator carried by the rotatable core.
Position indicator and radiopaque markers under advance and trailing segments
A thrombus engagement tool configured to be advanced through a catheter and to engage thrombus, comprising a rotatable core having a proximal end and a distal end; a thrombus engagement tip on the distal end of the rotatable core, the thrombus engagement tip comprising a helical thread, an advance segment on a distal side of the helical thread, and a trailing segment on a proximal side of the helical thread; a position indicator carried by the rotatable core; a first radiopaque marker under the advance segment; and a second radiopaque marker under the trailing segment.
Across the independent claims, the core claim coverage centers on a rotatable core with a distal helical thrombus engagement tip having an advance segment and a trailing segment, and the independent claim set distinguishes tools by adding a handle limit bearing surface to limit distal projection, a position indicator carried by the rotatable core, and both a position indicator and radiopaque markers positioned under the advance and trailing segments.
Stated Advantages
Improves aspiration response.
Allows visualization of captured thrombus through a transparent window.
Documented Applications
Used as a thrombus engagement tool configured to be advanced through a catheter to engage thrombus.
Used with clot capture/aspiration flow-control modules for clot capture and aspiration response with visualization of captured thrombus.
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