METHODS OF ASPIRATING THROMBI

摘要

Methods of providing suction may include providing suction patterns having varying intensity levels, such as a “crescendo suction” pattern. Cycles of crescendo suction patterns may comprise variable intensities of negative suction in a crescendo pattern (such as a small intensity negative suction pressure, a medium intensity negative suction pressure, and a large intensity negative suction pressure). The suction patterns may include pauses or temporary stops to the negative suction pressure.

主权项

1. A method of aspirating thrombi using a varying suction pattern, comprising:
inserting a distal end of a microcatheter within vasculature and advancing the distal end of the microcatheter to a location proximal to a thrombus; inserting a thrombectomy device to at least partially span the thrombus, applying suction to a proximal end of the microcatheter to aspirate the thrombus, wherein the suction applied comprises a repetitive pattern of varying suction intensity levels each applied for a particular time duration, wherein the repetitive pattern comprises three different suction intensity levels and at least one pause for a pause time duration, wherein applying suction to the proximal end of the microcatheter comprises causing an automated control unit to apply negative suction having the repetitive pattern, and wherein the at least one pause is at the end of the repetitive pattern such that there is a pause between each repetition of the repetitive pattern.