Surgical Stapling Device Impedance Sensor Tissue Differentiation
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Solution Overview
Problem
Current surgical stapling devices lack the ability to effectively differentiate between tissue types and detect electrical properties of tissue, which are crucial for precise stapling and preventing injuries to critical organs during procedures like prostate cancer surgery.
Innovation Solution
Incorporating impedance sensors with multiple electrodes in the jaw assembly of surgical stapling devices, allowing for the measurement of tissue impedance between the anvil and cartridge assemblies, enabling tissue differentiation and visualization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surgical stapling devices use traditional mechanical sensing only, then the device structure remains simple, but the ability to detect tissue electrical properties and differentiate tissue types is insufficient
Solution Approach 1:
The patent combines mechanical stapling functionality with electrical impedance sensing by integrating electrodes directly into the jaw assembly. The electrodes are embedded in the anvil and cartridge components, allowing simultaneous mechanical clamping and electrical measurement without requiring separate sensing devices.
Solution Approach 2:
The jaw assembly serves dual functions: mechanical clamping/stapling and electrical impedance measurement. The same physical components (anvil, cartridge) that perform surgical stapling also host the electrodes for tissue characterization, making the device multi-functional.
2Adaptability or versatility
If surgical stapling devices incorporate impedance sensors with multiple electrodes, then tissue differentiation capability is improved, but the device complexity increases
Solution Approach 1:
The electrodes are strategically positioned at specific locations within the jaw assembly where tissue contact occurs during clamping. The anvil electrode and cartridge electrode are placed to ensure direct contact with the tissue being stapled, providing localized measurement capability exactly where needed.
Solution Approach 2:
The electrodes act as intermediaries between the surgical device and the tissue's electrical properties. By placing conductive elements in direct contact with the tissue during normal clamping operation, the system mediates the measurement of impedance without requiring additional invasive probes or separate measurement apparatus.
3Productivity
If the firing speed of the stapler is increased for efficiency, then productivity is improved, but staple formation quality on thick tissue deteriorates
Solution Approach 1:
The impedance measurement provides real-time feedback about tissue properties before and during the stapling process. By measuring tissue impedance during clamping, the system can identify tissue thickness and composition, allowing dynamic adjustment of firing parameters to optimize staple formation while maintaining efficient operation.
Solution Approach 2:
The impedance measurement is performed during the clamping phase, before the actual firing occurs. This preliminary measurement allows the system to assess tissue properties and pre-adjust firing parameters based on the measured impedance, ensuring optimal staple formation is achieved before the stapling action begins.
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
Enables precise tissue type differentiation, improved stapling parameters, detection of cancer margins, and prevention of injuries to critical structures by providing real-time electrical property measurements during surgical procedures.
Implementation Method 1
The first and second electrodes operate in combination to measure the impedance of tissue between the anvil assembly and the cartridge assembly
Data Source
AI summary
A surgical stapling device includes a tool assembly including a jaw assembly and an impedance assembly. The jaw assembly includes an anvil assembly and a cartridge assembly. The tool assembly supports an impedance assembly for measuring the impedance of tissue grasped within the jaw assembly.