RF Tissue Sealer Mode Selection Assembly
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Solution Overview
Problem
Conventional electrosurgical devices lack the functionality to address multiple surgical scenarios efficiently, as they often fail to differentiate between cutting tissue with or without applying electrosurgical energy, or applying energy without cutting, leading to safety and usability issues.
Innovation Solution
A surgical instrument with a mode selection assembly that includes a knob to rotate between different modes, enabling or disabling energy delivery and cutting element functionality based on the surgical need, utilizing mechanisms such as electric motors, solenoids, nitinol wires, and mechanical switches to lock or unlock the cutting element, ensuring safe and intended use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional electrosurgical devices are used without mode selection, then the device structure remains simple, but the device cannot address multiple surgical scenarios (cutting with energy, cutting without energy, sealing only) leading to safety and usability issues
Solution Approach 1:
The device implements dynamic functionality through a mode selection assembly with a rotatable knob that allows the operator to switch between different operational modes (cutting with energy, cutting without energy, sealing only). This dynamic reconfiguration enables the same device to adapt to multiple surgical scenarios without requiring multiple separate devices, thereby improving versatility while maintaining reasonable structural complexity through a unified design.
2Reliability
If energy delivery and cutting functionality are always enabled, then the device is highly versatile, but unintended activation may occur leading to safety issues
Solution Approach 1:
The mode selection assembly requires the operator to deliberately rotate the knob to select and activate a specific mode before energy delivery or cutting functionality becomes available. This preliminary action of mode selection ensures intentional activation, preventing unintended operation while maintaining ease of use through a straightforward rotational interface. The system does not allow energy or cutting functions to be active without explicit mode selection.
3Productivity
If automated energy application is implemented, then productivity is improved, but the device complexity increases
Solution Approach 1:
The automated energy application feature is activated only after the operator has deliberately selected the appropriate mode by rotating the mode selection knob. This preliminary manual action serves as a safety gate, ensuring that automated functionality is only engaged when intentionally selected. The automation then proceeds without further intervention, improving productivity while the initial selection step prevents unintended activation, balancing complexity and safety.
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 mode selection assembly allows for safe and precise activation or deactivation of cutting and sealing functionalities, enhancing user safety by preventing unintended activation and enabling automated application of electrosurgical energy and cutting functionality, thus improving the device's versatility and safety.
Implementation Method 1
an electric motor coupled to the mode selection assembly; and a mechanical switch coupled to the electric motor
Implementation Method 2
a solenoid coupled to the mode selection assembly; and a pin coupled to the solenoid
Implementation Method 3
a wire comprising shape memory and elasticity characteristics and coupled to the control circuit, the wire configured to change shape by a current is applied to it
Implementation Method 4
the wire configured to change shape by a current is applied to it
Data Source
AI summary
Aspects of the present disclosure are presented for a surgical instrument for cutting and sealing tissue with a mode selection assembly. The mode selection assembly allows for a user to safely activate or disable a cutting functionality and a sealing functionality through use of electrosurgical energy. In some embodiments, the mode selection assembly allows for a more automated application of the electrosurgical energy and the cutting functionality when applied to a surgical site. The mode selection assembly may also include a knob configured to switch between the aforementioned settings. Various control mechanisms are also disclosed to lock and unlock the cutting element, such as a motorized locking mechanism, a solenoid locking mechanism, a mechanical mechanism and use of a nitinol wire. The inclusion of the mode selection assembly allows for a user to more safely utilize the surgical instrument by intentionally disabling functionality that may otherwise be inadvertently activated.