Catheter Navigation System Using Stored Shape Data
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Solution Overview
Problem
The navigation of catheters or guidewires during transarterial chemoembolization interventions is often inaccurate, making it difficult to consistently target the same location, which can decrease the effectiveness and efficiency of the intervention.
Innovation Solution
A navigation system that determines and stores the position and shape of an interventional device during a first procedure and uses this information to navigate the device along the same path during subsequent procedures, utilizing optical shape sensing and display technologies to ensure precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual navigation of the catheter is performed without historical path data, then the procedure can be performed quickly, but the navigation accuracy and consistency across different sessions deteriorates
Solution Approach 1:
The system performs preliminary action by capturing and storing the catheter's position and shape during the first interventional procedure before the second procedure begins. This historical data is prepared in advance and made available for use during subsequent procedures, enabling accurate path reproduction without requiring time-consuming real-time exploration.
Solution Approach 2:
The system creates a copy of the successful navigation path from the first procedure by storing the catheter's position and shape data. This copied path information is then used as a reference template during the second procedure, allowing the catheter to be navigated along the same proven trajectory without manual re-exploration.
2Reliability
If the catheter navigation path is not standardized across procedures, then each procedure can be adapted to current patient conditions, but the consistency and reliability of treatment deteriorates
Solution Approach 1:
The system applies dynamics by allowing the stored position and shape data to be dynamically adjusted and registered to current anatomical conditions. The navigation device can adapt the historical path to account for changes in patient anatomy, device characteristics, or procedural variations while maintaining overall path consistency, thus balancing reliability with adaptability.
3Measurement precision
If optical shape sensing is used to determine position and shape, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The system applies universality by implementing a multi-functional navigation device that integrates position determination, shape determination, data storage, and navigation guidance capabilities into a single unified system. This consolidates multiple functions that could otherwise require separate devices, reducing overall system complexity while maintaining high measurement precision through optical shape sensing.
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
This approach improves the accuracy and efficiency of interventional procedures by allowing the interventional device to be navigated along the same path in subsequent sessions, reducing the time required for interventions and enhancing the consistency of treatment.
Implementation Method 1
The position and shape determining unit is adapted to determine a second position and shape of an interventional device within the living being during a subsequent second interventional procedure
Data Source
AI summary
The invention relates to a navigation system for navigating an interventional device (11) like a catheter and an interventional system comprising the navigation system. A position and shape determining unit (13) determines and stores a first position and shape of the interventional device within a living being (9) during a first interventional procedure like a first chemoembolization session and determines a second position and shape of an interventional device within the living being during a subsequent second interventional procedure like a second chemoembolization session. During the second interventional procedure the interventional device is navigated based on the stored first position and shape and based on the second position and shape. This allows considering during the second interventional procedure the path of the interventional device used during the first interventional procedure. In particular, this allows navigating the interventional device along the same path during the first and second interventional procedures.