US 12,465,382 B1
Mechanical thrombectomy assemblies with relief features, and associated devices, systems, and methods
Brian Edward Merritt, San Clemente, CA (US); Jakub Marek Truty, San Clemente, CA (US); Aaron Dederich, San Clemente, CA (US); Anna Kristine Kratochvil, Huntington Beach, CA (US); and Nicole Marissa Morris, Santa Rosa, CA (US)
Assigned to Inari Medical, Inc., Irvine, CA (US)
Filed by Inari Medical, Inc., Irvine, CA (US)
Filed on Jul. 11, 2024, as Appl. No. 18/770,109.
Claims priority of provisional application 63/645,585, filed on May 10, 2024.
Int. Cl. A61B 17/22 (2006.01); A61B 17/221 (2006.01)
CPC A61B 17/22032 (2013.01) [A61B 2017/22079 (2013.01); A61B 2017/2212 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A clot treatment device for treating clot material within a blood vessel of a patient, the clot treatment device comprising:
a unitary structure including a plurality of interconnected struts, wherein the unitary structure defines a central axis, and wherein the unitary structure is expandable from a compressed position within a delivery catheter to an expanded position within the blood vessel, and wherein, in the expanded position, the unitary structure includes—
a first region defining a coupling portion configured to couple the unitary structure to a shaft;
a second region distal of the first region and defining a proximal mouth configured to capture at least a portion of the clot material when the shaft is retracted proximally;
a third region distal of the second region and defining one or more relief features angled inwardly toward the central axis, wherein the one or more relief features are configured to, when the shaft is retracted proximally:
retain the captured portion of the clot material between the proximal mouth and the one or more relief features when a force from the captured portion of the clot material on the one or more relief features is below a threshold, and
rotate away from the central axis to release the captured portion of the clot material when the force from the captured portion of the clot material equals or exceeds the threshold to reduce an overall force on the clot treatment device to inhibit mechanical failure of the clot treatment device; and
a fourth region distal of the second region and defining a distal terminus of the unitary structure.