Surgical Instrument Tip Calibration for Accurate Virtual Tracking
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Solution Overview
Problem
Current methods for instrument calibration in surgical instruments, particularly those with curved distal tips, fail to accurately account for distortions or bending that occur over time, leading to inaccurate virtual representations and potential safety risks during computer and robotic-assisted surgery.
Innovation Solution
A calibration system comprising a surgical instrument with a curved distal tip, a calibration instrument with a pivot point and a predefined geometric structure, and a monitoring system that records and calculates deviations from an ideal configuration to update the virtual representation, ensuring accurate tracking and representation of the instrument's geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current calibration methods are used for surgical instruments with curved distal tips, then initial calibration can be performed, but distortions or bending that occur over time lead to inaccurate virtual representations
Solution Approach 1:
The system performs preliminary calibration by recording the relative position of the orientation element to the calibration reference element before surgical use. This establishes a baseline virtual representation that can be updated later, allowing the system to proactively address potential geometric deviations before they affect surgical accuracy
Solution Approach 2:
The monitoring system continuously tracks the orientation element and compares its recorded movement against the predefined ideal instrument axis and distal-most tip. This feedback mechanism detects deviations from the ideal geometry and enables updates to the virtual representation, ensuring ongoing accuracy despite physical changes to the instrument
2Measurement precision
If frequent recalibration is performed to maintain accuracy, then virtual representation precision is improved, but surgical time and productivity are reduced
Solution Approach 1:
The system performs comprehensive calibration data collection and virtual representation updates in advance, before the surgical procedure begins. By completing the calibration process beforehand, the system eliminates the need for frequent interruptions during surgery, thus maintaining high measurement precision without compromising surgical productivity
Solution Approach 2:
The monitoring system automatically tracks the orientation element and calculates deviations from the ideal configuration without requiring manual intervention. The system self-updates the virtual representation based on recorded data, reducing the time and effort needed for recalibration while maintaining continuous accuracy
3Adaptability or versatility
If instruments with curved distal tips are used to achieve complex surgical access, then adaptability is improved, but accurate modeling and tracking become more difficult
Solution Approach 1:
The system divides the curved distal tip into manageable segments by defining a predefined ideal instrument axis and a predefined ideal distal-most tip. The orientation element's movement is tracked and compared against these segmented reference points, breaking down the complex curved geometry into measurable components that can be accurately monitored
Solution Approach 2:
The orientation element serves as an intermediary between the curved distal tip and the monitoring system. By attaching the orientation element to the proximal end of the instrument and tracking its movement, the system indirectly measures the position and orientation of the difficult-to-access curved distal tip, simplifying the detection and measurement process
Data Source
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AI summary
Surgical instrument calibration methods, systems, and devices are provided that allow a virtual representation of a surgical instrument to be modified to adjust for any variations in a distal tip of a surgical instrument. For example, an instrument calibration system is provided that can have a surgical instrument, a calibration instrument, and a monitoring system. The surgical instrument can have a distal tip and an orientation element thereon, and the calibration instrument can have a pivot point thereon and a calibration reference element attached thereto. The monitoring system can be configured to record movement of the surgical instrument with respect to the calibration instrument when the tip of the surgical instrument is inserted into the pivot point of the calibration instrument, and to calculate a deviation of the tip of the surgical instrument from a predefined ideal tip based on the recorded movement.