Surgical Robotic Arm Virtual Barriers for Safe Anatomical Access
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Solution Overview
Problem
Surgeons using robotic assistance in surgery may inadvertently move robotic arms into patients due to fatigue or lack of dexterity, potentially causing injury, and existing systems fail to adequately prevent such accidents.
Innovation Solution
A virtual barrier system is implemented in a robotic arm system that restricts movement of the slave apparatus based on predefined barriers, requiring surgeons to perform specific gestures or voice commands to unlock access to anatomical areas, ensuring safe surgical procedures by testing their skill and tool appropriateness before proceeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a robotic arm system is used to assist surgery, then surgical precision and control are improved, but the risk of accidental movement into the patient increases due to surgeon fatigue and reduced dexterity
Solution Approach 1:
A virtual barrier system acts as an intermediary between the surgeon's control inputs and the robotic arm movements. The system monitors tool positions relative to predefined safety boundaries and automatically prevents movements that would breach these barriers, thereby eliminating the risk of accidental movements caused by surgeon fatigue while preserving surgical precision within safe zones.
Solution Approach 2:
The system pre-establishes virtual barriers around critical anatomical structures before surgery begins. These barriers create preliminary protective constraints that automatically counteract any potential harmful movements, preventing accidents before they can occur rather than reacting after fatigue causes errors.
2Reliability
If virtual barriers are implemented to restrict robotic arm movement, then patient safety is improved, but surgeon flexibility and access to anatomical areas are reduced
Solution Approach 1:
The virtual barriers are designed to be dynamic rather than static constraints. The system continuously monitors surgical progress and can adaptively adjust barrier configurations based on the current surgical step, allowing surgeons to access anatomical areas when appropriate while maintaining safety constraints. This dynamic approach preserves surgeon flexibility while ensuring patient safety.
Solution Approach 2:
The system provides real-time feedback to surgeons about their proximity to virtual barriers and the status of safety constraints. This feedback mechanism allows surgeons to understand when and why movements are restricted, enabling them to plan their actions accordingly and maintain flexibility within the safety framework rather than experiencing arbitrary limitations.
3Measurement precision
If gesture recognition and voice commands are required to unlock virtual barriers, then control accuracy is improved, but operation time and complexity increase
Solution Approach 1:
The system performs preliminary recognition and validation of surgeon intentions before executing barrier-unlocking actions. By continuously monitoring gestures and voice commands in advance and pre-validating them against surgical context, the system reduces the time penalty associated with these additional control steps, as much of the processing occurs proactively rather than reactively during critical moments.
Solution Approach 2:
The system automatically recognizes and interprets surgeon gestures and voice commands without requiring explicit confirmation steps or complex interaction sequences. The gesture recognition and voice processing systems work autonomously to understand intent and execute appropriate actions, minimizing the time burden on surgeons while maintaining high control accuracy through multiple validation layers.
Data Source
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AI summary
A robotic arm system for surgery is described. The method includes: processing circuitry configured to: apply a virtual barrier preventing a human controlled surgical device from entering an area within a surgical scene; and release the virtual barrier in response to a gesture.