Geschlossene rückkopplungsregelung der motordrehzahl eines chirurgischen klammer- und schneidinstruments auf der basis von drehzahlgrössen-geschwindigkeitsfehlermessungen

AT1917767TActive Publication Date: 2026-05-15ETHICON INC
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Patent Information

Application Number
AT2024168504T
Authority / Receiving Office
AT · AT
Patent Type
Patents
Current Assignee / Owner
Priority Date
2017-06-20
Filing Date
2017-12-21
Publication Date
2026-05-15
Estimated Expiration
2037-12-21

AI Technical Summary

Technical Problem

Motorized surgical stapling and cutting instruments face challenges in accurately controlling the velocity of cutting members and articulating end effectors due to velocity control system errors between commanded and actual speeds, necessitating a closed-loop feedback system to adjust velocities based on error terms.

Method used

A surgical instrument with a displacement member, motor, position sensor, and timer circuit, where a control circuit determines the position and zone of the displacement member to set directed velocity, compare actual to directed velocity, and adjust the velocity based on errors, ensuring precise control through a closed-loop feedback mechanism.

Benefits of technology

This solution enables precise control of the surgical instrument's cutting and articulation processes, improving tissue handling by adjusting velocities in real-time to match tissue conditions, thereby enhancing the accuracy and efficiency of surgical procedures.

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Abstract

A motorized surgical instrument is disclosed. The surgical instrument includes a displacement member. A motor is coupled to the displacement member and a control circuit. A position sensor is coupled to the control circuit and a timer circuit to measure elapsed time. The control circuit is configured to determine a position of the displacement member, determine an error between directed and actual velocity and adjust the directed velocity based on the error in comparison to one or more thresholds. The control circuit also is configured to adjust the rate of change of the directed velocity based on the one or more thresholds. The control circuit also is configured to determine a zone in which the displacement member is located and set the directed velocity based on the zone in which the displacement member is located.
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