Arthroscopic Cutting Probe With Probe ID and Short-Circuit Control
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Solution Overview
Problem
Existing arthroscopic surgical systems face challenges in accommodating flexibility for multiple functionalities, requiring accurate identification and control of interchangeable tool probes, especially in procedures involving bone and soft tissue cutting and removal.
Innovation Solution
The system includes a motor-driven tissue cutting probe with a burr and electrode on its distal end, capable of high-speed rotation, and a controller that senses current flow to prevent electrode shorting, along with a handpiece using magnets and sensors for probe identification and control, ensuring precise operation and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single tool system is used to accommodate multiple functionalities (bone cutting, soft tissue removal, ablation, coagulation), then versatility is improved, but device complexity increases due to the need for accurate tool probe identification and control
Solution Approach 1:
The surgical system employs a universal handpiece that can accommodate multiple interchangeable tool probes, each capable of performing different surgical functions such as bone cutting, soft tissue removal, ablation, and coagulation. The handpiece integrates multiple control modes and identification mechanisms to support diverse functionalities within a single device platform.
Solution Approach 2:
The system incorporates automatic tool probe identification through sensors that detect the attached probe type and retrieve stored operational parameters. This feedback mechanism ensures the control unit receives correct information about the attached probe's identity and parameters, enabling appropriate control settings without manual intervention and reducing system complexity.
2Adaptability or versatility
If interchangeable tool probes are used to provide flexibility, then adaptability is improved, but measurement precision is required to accurately identify and control the attached probe
Solution Approach 1:
The system replaces manual identification methods with automated sensor-based detection. Sensors in the handpiece automatically detect the attached tool probe's identity through magnetic, optical, or RFID signals, eliminating the need for manual configuration and ensuring high precision in probe identification and parameter retrieval.
3Productivity
If high-speed rotation is used for efficient tissue cutting, then productivity is improved, but the risk of electrode shorting increases
Solution Approach 1:
The system implements periodic monitoring of electrode positions during high-speed rotation. The control unit continuously checks the spatial relationship between electrodes at regular intervals, temporarily suspending electrosurgical current delivery when shorting risk is detected and resuming when safe conditions are restored, thereby maintaining productivity while ensuring safety.
Solution Approach 2:
The control unit receives real-time feedback on electrode positions and rotational status, dynamically adjusting current delivery based on the detected risk of shorting. This feedback loop enables the system to maintain high-speed rotation for efficient cutting while preventing electrode shorting through automated safety control.
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
Enables efficient cutting and removal of bone and soft tissue with reduced risk of electrode shorting, while providing accurate identification and control of interchangeable probes, enhancing surgical efficiency and safety.
Implementation Method 1
motor-driven tubular cutter or arthroscopic shavers that are configured for both mechanical cutting and electrosurgical cutting
Implementation Method 2
electrosurgical cutting, ablation and coagulation procedures
Data Source
AI summary
A tissue cutting probe includes an outer sleeve assembly, an inner sleeve assembly, a burr and an electrode. Each of the inner and outer sleeves has a proximal end, a distal end, and central passage extending therebetween. The inner sleeve assembly is coaxially and rotatably received in the central passage of the outer sleeve assembly, and the burr has a plurality of metal cutting edges carried on a first side of the distal end of the inner sleeve assembly. The electrode is carried a second side of the distal end of the inner sleeve assembly.