High-Density Cardiac Electrode Layout for Precise Lesion Mapping
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Solution Overview
Problem
Conventional transducer-based intra-bodily-cavity devices have limited transducer density, complicating lesion formation and anatomical feature mapping during intravascular or percutaneous surgeries, particularly in treating atrial fibrillation, due to difficulties in creating accurate lesions and mapping electrical signals.
Innovation Solution
A high-density arrangement of transducers within a medical device system, including elongate members with electrodes positioned in a bodily cavity, allowing for enhanced tissue discrimination, lesion formation, and anatomical feature mapping, with configurations enabling percutaneous or intravascular deployment and expansion for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional transducer-based devices are used, then device simplicity is maintained, but transducer density is limited which complicates lesion formation and anatomical mapping
Solution Approach 1:
The device structure is divided into multiple elongate members, each carrying multiple transducers. This segmentation allows the device to achieve high transducer density while maintaining a manageable overall structure that can be delivered through catheter systems.
Solution Approach 2:
The elongate members with high-density transducer arrays are designed to be nested within a delivery catheter system. This nesting approach enables the complex high-density structure to be compressed into a deliverable form while maintaining the transducer density required for precise lesion formation and anatomical mapping.
2Reliability
If intravascular or percutaneous techniques are used, then patient recovery time is reduced, but direct visual contact with devices is lost making lesion placement difficult
Solution Approach 1:
The device incorporates multiple transducers that provide real-time feedback on tissue contact, electrical signal detection, and lesion formation status. This feedback mechanism compensates for the lack of direct visual contact by giving operators tactile and electrical feedback about device-tissue interaction and lesion placement accuracy.
Solution Approach 2:
The device replaces visual monitoring with electrical and tactile sensing capabilities. Multiple transducers detect electrical signals from cardiac tissue and provide feedback about contact force and tissue properties, substituting the need for direct visual observation with electronic sensing and feedback systems.
3Manufacturing precision
If high-density transducer arrangement is implemented, then lesion precision is improved, but device deployment complexity increases
Solution Approach 1:
The device incorporates expandable or reconfigurable elongate members that can transition from a compressed delivery state to an expanded operational state. This dynamic transformation allows the high-density transducer array to be delivered in a compact form and then deployed into a configuration optimized for precise lesion formation and anatomical mapping.
Data Source
AI summary
A medical device system is disclosed including a high-density arrangement of transducers, which may be configured to ablate, stimulate, or sense characteristics of tissue inside a bodily cavity, such as an intra-cardiac cavity. High-density arrangements of transducers may be achieved, at least in part, by overlapping elongate members on which the transducers are located, and varying sizes, shapes, or both of the transducers, especially in view of the overlapping of the elongate members. Also, the high-density arrangements of transducers may be achieved, at least in part, by including one or more recessed portions in an elongate member in order to expose one or more transducers on an underlying elongate member in a region adjacent an elongate-member-overlap region.