Shape Sensing Guide Device for Interventional Instrument Navigation
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Solution Overview
Problem
Minimally invasive procedures face challenges in accurately guiding interventional instruments to internal targets without damaging surrounding tissues, and existing solutions often require modifications to the instruments or rely on extensive x-ray imaging, which can be costly and harmful.
Innovation Solution
A system comprising a guide device with a holder and shape sensing device that provides navigational guidance by determining the position and orientation of the interventional instrument using shape sensing data, allowing for precise entry trajectory alignment without the need for extensive imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are integrated directly into the interventional instrument, then navigational guidance accuracy is improved, but device complexity and manufacturing difficulty increase due to geometry constraints and instrument portfolio diversity
Solution Approach 1:
The system divides the guidance functionality into separate components: a guide device with shape sensing capabilities and the interventional instrument itself. The shape sensing device is detached from the instrument and instead attached to the guide device, allowing the instrument to remain simple while still enabling precise navigation through collaborative sensing between the guide device and instrument.
Solution Approach 2:
The guide device acts as an intermediary between the shape sensing device and the interventional instrument. It provides a stable mounting platform for the shape sensing device and establishes the entry trajectory, while the instrument follows this predefined path, eliminating the need to integrate sensors directly into the instrument.
2Measurement precision
If extensive x-ray imaging is used during the procedure, then real-time position verification is improved, but patient radiation exposure and procedure cost increase
Solution Approach 1:
The system replaces x-ray imaging with optical shape sensing to track the position and orientation of the guide device and instrument. Shape sensing devices use optical fibers and light reflection principles to determine spatial coordinates, providing real-time navigation data without ionizing radiation exposure to the patient.
Solution Approach 2:
The shape sensing device attached to the guide device provides self-contained position verification capabilities. The guide device's position and orientation are determined autonomously through shape sensing data, eliminating the need for external x-ray imaging systems to verify placement.
3Measurement precision
If the guide device position is determined using shape sensing data, then navigational guidance precision is improved, but the need for additional attachment components increases device complexity
Solution Approach 1:
The fastener mechanism allows dynamic attachment and detachment of the shape sensing device to the guide device. This reversible connection enables flexible setup and adjustment while maintaining a stable, reproducible geometric relationship during the procedure, balancing attachment security with operational flexibility.
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 solution enhances the accuracy and efficiency of interventional procedures by reducing the need for real-time imaging, minimizing tissue damage, and providing precise navigational guidance for interventional instruments.
Implementation Method 1
a shape sensing device secured to the guide device by the fastener such that at least a portion of the shape sensing device secured to the guide device has the fixed shape with the at least one identifiable shape feature, the shape sensing device being arranged to provide shape sensing data relating to the fixed shape of the at least a portion of the shape sensing device secured to the guide device by the fastener
Data Source
AI summary
A system is provided for guiding an interventional instrument (150) to an internal target in a subject. The system includes a guide device (100) configured to rest on an outer surface of the subject and a shape sensing device (140). The guide device includes a holder (120) configured to receive the interventional instrument (150) and to provide an entry trajectory of the interventional instrument (150) for guiding the interventional instrument (150) to the target; and a fastener (130) attached to a portion of the guide device (100). The shape sensing device (140) provides shape sensing data indicating a shape of at least a portion of the shape sensing device (140) secured to the guide device (100) by the fastener (130). The shape sensing data enables determination of a position and orientation of the guide device (100) on the outer surface of the subject.