Electrosurgical System Real-Time Gap Control
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Solution Overview
Problem
Existing electrosurgical instruments often fail to create a consistent and effective tissue seal due to inadequate control over mechanical and electrical parameters such as clamping pressure, gap distance, and energy application, leading to incomplete or unreliable vessel sealing.
Innovation Solution
An electrosurgical system with movable jaw members and sensors that adjust the output of electrosurgical energy based on real-time measurements of the gap distance between the sealing plates, ensuring a controlled rate of tissue thickness reduction for optimal sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrosurgical instruments apply high RF electrical current to seal tissue, then tissue sealing is achieved, but cell rupture occurs and tissue thickness decreases precipitously
Solution Approach 1:
The system dynamically adjusts the RF energy output in real-time based on the measured tissue thickness and gap distance. The electrosurgical generator modifies energy delivery parameters during the sealing process to maintain optimal conditions, preventing excessive energy application that would cause cell rupture while ensuring adequate sealing.
Solution Approach 2:
The system incorporates sensors that continuously measure gap distance and tissue thickness, providing real-time feedback to the control system. This feedback loop enables the generator to adjust energy delivery based on actual tissue conditions, preventing harmful over-application of energy while ensuring effective sealing.
2Reliability
If clamping pressure is increased to improve sealing, then tissue compression improves, but gap distance control becomes more difficult
Solution Approach 1:
Sensors continuously measure the gap distance between opposing jaw members and provide real-time feedback to the control system. This enables dynamic adjustment of energy delivery to compensate for variations in tissue thickness and clamping pressure, maintaining consistent sealing quality despite mechanical variations.
Solution Approach 2:
The system changes energy delivery parameters based on measured gap distance and tissue conditions. By adjusting RF energy output in response to mechanical parameters, the system compensates for variations in clamping pressure and gap distance to achieve consistent sealing results.
3Productivity
If energy output is increased to seal tissue faster, then productivity improves, but tissue thickness decreases too rapidly causing cell rupture
Solution Approach 1:
The system dynamically adjusts energy output based on real-time measurements of tissue thickness and gap distance. Rather than using fixed high power settings, the generator modulates energy delivery to match actual tissue conditions, enabling fast sealing when appropriate while preventing harmful rapid thinning.
Solution Approach 2:
Continuous measurement of tissue thickness and gap distance provides feedback that enables the control system to regulate energy delivery rate. This feedback mechanism prevents excessive energy application that would cause uncontrolled tissue thinning and cell rupture while maintaining efficient sealing speed.
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 approach ensures a consistent and effective tissue seal by controlling the rate of tissue thickness decrease, maintaining the optimal amount of tissue between the sealing plates and enhancing the strength and reliability of the sealing process.
Implementation Method 1
application of high radio frequency electrical current to a surgical site to cut, ablate, coagulate, cauterize, desiccate or seal tissue
Implementation Method 2
Tissue or vessel sealing is a process of liquefying the collagen, elastin and ground substances in the tissue so that they reform into a fused mass
Data Source
AI summary
An electrosurgical system for sealing tissue is disclosed which includes an electrosurgical forceps having a shaft member and a jaw member disposed at a distal end thereof. The jaw members are movable from a first position in spaced relation relative to one another to at least one subsequent position wherein the jaw members cooperate to grasp tissue therebetween. Each of the jaw members including a sealing plate which communicates electrosurgical energy through tissue held therebetween. The jaw members are adapted to connect to an electrosurgical generator. The system also includes one or more sensors which determine a gap distance between the sealing plates of the jaw members and a microprocessor which is adapted to communicate with the sensor and measure an initial gap distance between the sealing plates as well as to generate a desired gap distance trajectory based on the initial gap distance. The microprocessor is further adapted to communicate with the at least one sensor in real time to adjust output level of the electrosurgical generator as a function of the measured gap distance during the sealing process.