End Effector Tissue Sensing for Accurate RF Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surgical instruments lack the ability to accurately identify and verify the presence of the correct tissue type before applying therapeutic RF energy for sealing or welding, potentially leading to improper tissue treatment.
Innovation Solution
Incorporation of a tissue position sensor in the end effector that applies a non-therapeutic RF waveform to measure tissue impedance, allowing for precise identification and verification of tissue type, ensuring correct tissue is targeted for treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a tissue position sensor is added to the end effector to measure tissue impedance, then tissue identification accuracy is improved, but device complexity increases
Solution Approach 1:
The tissue position sensor is integrated into the end effector structure, combining the sensing function with the existing mechanical components. The sensor is positioned within the jaw assembly, allowing it to measure tissue impedance directly at the treatment site without requiring separate external sensing devices.
Solution Approach 2:
The end effector is designed to perform multiple functions: mechanical compression of tissue, delivery of therapeutic RF energy for sealing/cutting, and measurement of tissue impedance for identification. This multi-functionality eliminates the need for separate dedicated sensing equipment.
2Reliability
If RF energy is applied to seal or weld tissue, then sealing effectiveness is improved, but risk of improper tissue treatment increases without verification
Solution Approach 1:
The tissue position sensor measures tissue impedance before therapeutic RF energy is applied. This preliminary measurement identifies and verifies the correct tissue type is present in the end effector, ensuring that sealing or cutting operations are performed only on appropriate tissue, thereby preventing improper treatment.
Solution Approach 2:
The system uses real-time impedance measurement feedback to control the therapeutic RF energy delivery. The controller monitors the tissue position sensor readings and uses this information to regulate when and how therapeutic energy is applied, ensuring safe and effective treatment based on actual tissue conditions.
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 accurate tissue identification and verification, preventing improper treatment and enhancing the precision of cutting and sealing procedures.
Implementation Method 1
a tissue position sensor in the end effector that applies a non-therapeutic RF waveform to measure tissue impedance
Data Source
AI summary
Systems and methods are described for a surgical instrument. Certain embodiments can comprise an end effector with upper and lower jaws that can compress tissue therebetween. A sensing probe with a sensing electrode can be extended along the surface of the tissue in a track located within one of the jaws. The sensing electrode can be configured to detect location or type of tissue. Once position, size, or other factors are known about the tissue, a knife member can be deployed in the track or a separate track with increased accuracy and precision.