Segmented Capacitive Return Pad for Nerve Detection and Burn Prevention
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Solution Overview
Problem
Existing electrosurgical systems face challenges in ensuring adequate surface area for return pads to prevent patient burns and inadvertent nerve injury during tissue cutting, particularly when nerve locations are difficult to discern.
Innovation Solution
The system incorporates a return pad with a plurality of conductive members and sensing devices to detect nerve signals and patient movements, enabling precise nerve location and reducing the risk of nerve injury while maintaining safe current density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the return pad surface area is increased to prevent patient burns, then current density is reduced and safety is improved, but the device size and complexity increase
Solution Approach 1:
The return pad is divided into multiple conductive members arranged in an array, where each member can be independently controlled. This segmentation allows the system to distribute current across multiple smaller elements rather than requiring one large pad, thereby maintaining safety while reducing the complexity of ensuring uniform contact across a large surface area.
Solution Approach 2:
The system dynamically selects and activates specific conductive members based on real-time sensing of nerve locations and tissue conditions. This dynamic adaptation allows the return pad to optimize current distribution during surgery, maintaining safety without requiring all conductive members to be simultaneously active or uniformly sized.
2Reliability
If sensing devices are added to detect nerve signals, then nerve protection capability is improved, but device complexity and cost increase
Solution Approach 1:
The conductive members serve dual functions: they act as both electrosurgical electrodes for cutting/coagulation and as sensing electrodes for detecting nerve signals. This multi-functionality eliminates the need for separate sensing devices, reducing overall system complexity while maintaining nerve protection capabilities.
Solution Approach 2:
The sensing and therapy functions are merged into a single integrated system where the same conductive members used for electrosurgery also perform sensing. The system combines nerve signal detection, smoke detection, and electrosurgical energy delivery into one unified platform, reducing the number of separate components needed.
3Measurement precision
If multiple conductive members are used in the return pad, then current distribution and nerve detection are improved, but manufacturing complexity increases
Solution Approach 1:
The return pad is segmented into multiple discrete conductive members that can be manufactured as separate components and then assembled into an array. This segmentation simplifies manufacturing by allowing each member to be produced using standard techniques, then combined into the final configuration, rather than manufacturing one complex integrated structure.
Solution Approach 2:
The system allows for variation in the parameters of individual conductive members (such as size, shape, and position) to optimize performance for different surgical applications. This flexibility enables manufacturers to produce standardized components that can be configured in different arrangements without requiring custom manufacturing for each specific setup.
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
The solution enhances nerve protection and prevents unwanted burns by ensuring proper nerve detection and current distribution, improving surgical safety and efficacy.
Implementation Method 1
a plurality of conductive members configured to receive radio frequency current applied to a patient
Implementation Method 2
a plurality of sensing devices configured to detect at least one of the following: a nerve control signal applied to a patient; and a movement of an anatomical feature of the patient resulting from application of the nerve control signal
Implementation Method 3
Capacitive coupled return path pad with separable array elements
Data Source
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AI summary
A return pad of an electrosurgical system is disclosed. The return pad includes a plurality of conductive members and a plurality of sensing devices. The conductive members are configured to receive radio frequency current applied to a patient. The sensing devices are configured to detect at least one of the following: a nerve control signal applied to the patient; and a movement of an anatomical feature of the patient resulting from application of the nerve control signal.