Ultrasonic Surgical Probe Force Feedback Control
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Solution Overview
Problem
Ultrasonic surgical instruments face challenges in maintaining an optimal pressing force during tissue treatment, as existing systems lack effective feedback mechanisms to ensure the force is within a desired range, affecting treatment efficiency and tissue excision quality.
Innovation Solution
An ultrasonic surgical instrument with a detector to measure pressing force, a memory to store predetermined force values, and a comparison section to notify the operator of deviations, allowing for real-time adjustments to maintain appropriate force levels, differentiated for cortical bone, cancellous bone, and cartilage excision modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultrasonic vibration is applied to treat living tissue, then tissue excision efficiency is improved, but pressing force control becomes difficult affecting treatment quality
Solution Approach 1:
The patent implements a feedback control system where a detector measures the pressing force between the probe and living tissue, compares it with a predetermined appropriate pressing force value, and provides notification to the operator. This closed-loop feedback mechanism enables real-time monitoring and adjustment of pressing force, ensuring it remains within the appropriate range for optimal tissue excision while preventing excessive force that could cause damage.
2Productivity
If pressing force is increased to improve tissue excision, then treatment speed increases, but heat invasion to surrounding tissue increases
Solution Approach 1:
The feedback control system continuously monitors pressing force and notifies the operator when it deviates from the appropriate range. This enables maintenance of optimal pressing force that maximizes tissue excision efficiency while preventing excessive force that would generate harmful heat in surrounding tissues.
3Device complexity
If pressing force is not monitored, then device complexity is reduced, but treatment quality and safety deteriorate
Solution Approach 1:
The patent incorporates a detector, comparison section, and notification section to create a feedback control system. The detector measures pressing force, the comparison section compares it with predetermined appropriate values, and the notification section alerts the operator to deviations. This relatively simple feedback mechanism significantly improves treatment quality and safety by ensuring consistent appropriate pressing force without requiring complex control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures efficient tissue excision by maintaining appropriate pressing forces, reducing heat invasion and improving treatment outcomes by providing real-time feedback and control of ultrasonic vibration amplitude based on detected forces.
Implementation Method 1
an ultrasonic transducer configured to vibrate ultrasonically; a probe configured to treat a living tissue by the ultrasonic vibration
Implementation Method 2
a detector configured to detect a pressing force of the probe against the living tissue
Data Source
AI summary
An ultrasonic surgical instrument includes an ultrasonic transducer configured to vibrate ultrasonically, a probe configured to treat a living tissue by the ultrasonic vibration, a detector configured to detect a pressing force of the probe against the living tissue, a memory configured to store a predetermined value related to a pressing force in accordance with the living tissue, a comparing section configured to compare the pressing force detected by the detector with the predetermined value stored in the memory, and a notification section configured to perform a notification in response to a comparison result obtained by the comparing section.