Magnetic Cannula Identification for Robotic Surgical Compatibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surgical cannulas lack effective systems for automatic identification, particularly in teleoperated surgical systems, leading to challenges in distinguishing varying configurations and types during surgical procedures.
Innovation Solution
Incorporation of a magnet-based identification device within the cannula, which provides unique identification information through the presence and polarity of magnets, sensed by a reader system on the patient side cart, allowing automatic detection and recognition of cannula configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual identification methods are used for surgical cannulas, then the system complexity is reduced, but the productivity and accuracy of cannula identification deteriorate
Solution Approach 1:
The patent replaces manual mechanical identification methods with an automated magnetic sensing system. Magnets embedded in the cannula interact with magnetic sensors on the robotic arm, enabling automatic identification of cannula type, orientation, and position without manual intervention. This substitution dramatically improves identification speed while the modular sensor design keeps system complexity manageable.
Solution Approach 2:
The cannula itself carries identification information through embedded magnets, allowing the system to identify the cannula automatically when it is attached to the robotic arm. The cannula essentially identifies itself through its magnetic signature, eliminating the need for external identification procedures or complex manual verification processes.
2Measurement precision
If magnets are embedded in the cannula for identification, then the measurement precision of cannula configuration is improved, but the device complexity increases
Solution Approach 1:
Rather than making the entire cannula complex, the patent embeds magnets only in specific strategic locations along the cannula. The number, position, and orientation of these localized magnetic elements encode information about cannula type, length, and configuration. This localized approach provides high measurement precision while adding minimal complexity only where needed for identification.
Solution Approach 2:
The patent uses variations in magnetic parameters (number of magnets, their positions, orientations, and polarities) to encode different cannula configurations. By changing these magnetic parameters rather than the physical dimensions or material properties of the entire cannula, the system achieves precise differentiation between cannula types with minimal structural modification.
3Loss of information
If multiple magnets with different polarities are used for identification, then the loss of information about cannula types is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The magnets are pre-configured with specific polarities and positions during the cannula manufacturing process. This preliminary encoding of identification information ensures that when the cannula is later attached to the robotic arm, the magnetic sensors can immediately read the pre-established magnetic signature without requiring real-time adjustment or complex interpretation algorithms.
Solution Approach 2:
The identification system is segmented into discrete magnetic elements rather than using a continuous or complex magnetic pattern. Each magnet serves as an independent information carrier, and the system can identify cannula types by detecting the presence, position, and polarity of individual magnets. This segmentation simplifies both manufacturing (each magnet can be placed independently) and reading (each sensor detects individual magnets).
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 accurate and efficient identification of cannula types, ensuring proper instrument compatibility and system integration, enhancing surgical procedure efficiency and reliability.
Implementation Method 1
a magnet located in a position to be sensed by the surgical system in a mounted position of the cannula to the surgical system. At least one of a presence of the magnet and a polarity of the magnet is sensed in the mounted position of the cannula
Data Source
AI summary
A medical system includes a manipulating system comprising a manipulator arm; a cannula mount comprising a receptacle, and one or more magnet sensors configured to sense a magnetic field. The system further includes a cannula for insertion of a medical instrument mounted at the manipulator arm. The cannula includes an attachment portion insertable into the receptacle of the cannula mount to mount the cannula in a position to permit removable insertion of the medical instrument through the tube portion, and one or more magnets arranged at the attachment portion to encode information relating to the cannula. The system further includes a controller to receive output from the one or more magnet sensors and to control the manipulator arm based on the output.