Automatic adjusting method for thrombectomy pump operation

By acquiring the scalar product of the real-time stator voltage and current vectors, a frequency-selective filtering mechanism for dynamic speed feedback is established to eliminate steady-state power consumption components, monitor the first-order differential gradient change of the micro-elastic recoil energy product, and actively output a negative gradient pulse width modulation signal. This solves the control blind zone problem of thrombus aspiration equipment under transient conditions, realizes pre-intervention and precise arbitration of thrombus detachment, and ensures the safety of the blood vessel wall and aspiration efficiency.

CN122140325AInactive Publication Date: 2026-06-05HUNAN RUIKANTONG TECH DEV CO LTD
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Patent Information

Application Number
CN202610621447.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-08
Publication Date
2026-06-05
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

When faced with transient conditions such as dense thrombus embedding or catheter adhesion to the vessel wall, the control system of existing thrombus aspiration equipment cannot capture changes in load status in time, resulting in a step drop in mechanical impedance, speed overshoot and negative pressure surge. Furthermore, it is difficult to distinguish the load attributes, posing a risk of accidentally aspirating the vessel wall.

Method used

By acquiring the scalar product of the real-time stator voltage vector and current vector, a frequency-selective filtering mechanism for dynamic speed feedback is established to eliminate steady-state power consumption components, monitor the first-order differential gradient change of the micro-elastic recoil energy product, actively output a negative gradient pulse width modulation signal, compensate for the blind zone of the integral response characteristics of the pressure sensor, and realize pre-intervention and precise arbitration of thrombus detachment.

Benefits of technology

Eliminating fluid dynamic transmission hysteresis enables pre-intervention in thrombus detachment, avoids speed overshoot and negative pressure surge, ensures the safety of the blood vessel wall and aspiration efficiency, and enhances load identification accuracy under complex working conditions.

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Abstract

The invention relates to the technical field of general control or regulation systems, and discloses an automatic regulation method for thrombectomy pump operation, which comprises the following steps: synchronously acquiring a voltage vector and a current vector of a controlled execution unit; calculating the scalar product of the voltage vector and the current vector to generate transient active power; removing a steady-state power consumption component in the transient active power and extracting an energy recoil pulse; a micro-elastic recoil energy product representing load yield information is generated through integration; according to the method, a vector power analysis mechanism is used for capturing a load fragmentation signal, hydraulic hysteresis of a control loop is eliminated, it is ensured that the negative pressure release rate of a pipeline is matched with the load displacement increment, and the control precision of the pipeline is improved. And the adjustment accuracy under the load impedance step working condition is improved.
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