Surgical Cutting Device with Blunt Tip for Tissue Protection
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Solution Overview
Problem
Current methods for cutting nerve and soft tissue during minimally invasive procedures face challenges such as difficulty in achieving precise dissection, high collateral thermal damage, and inadequate control over tissue necrosis, leading to pain and inefficient tissue removal.
Innovation Solution
A cutting device with an elongated shaft and distal arm featuring a blunt tip and inner cavity for tissue capture, along with proximal arms equipped with cutting portions that can be used to slice tissue while minimizing damage, and a vacuum attachment for tissue removal, allowing for precise and controlled cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radio frequency energy is used to cut tissue, then cutting efficiency is improved, but collateral thermal damage to surrounding tissue increases
Solution Approach 1:
The patent applies local quality by creating a highly focused RF energy field confined to a small treatment zone (0.5-2mm diameter) through a needle electrode. The energy is concentrated locally at the target site while surrounding tissue remains unaffected, resolving the contradiction between efficient cutting and collateral damage by making the energy application highly localized rather than diffuse.
Solution Approach 2:
The patent uses a needle electrode as an intermediary to deliver RF energy precisely to the target tissue. This intermediary allows controlled energy transfer to a specific location without affecting surrounding areas, enabling efficient cutting while preventing thermal damage to adjacent structures through precise spatial confinement of the energy field.
2Productivity
If high power settings are used to initiate cut in closed environment, then cutting ability is improved, but pain and thermal damage increase
Solution Approach 1:
The needle electrode concentrates RF energy to a very small focal point (0.5-2mm), allowing effective cutting at lower overall power levels. This localized energy concentration achieves cutting capability without requiring high power settings that would cause widespread thermal damage and pain, resolving the contradiction by improving energy delivery efficiency through spatial confinement.
3Productivity
If standard electrosurgical devices are used, then tissue resection is achieved, but fine dissection precision is reduced
Solution Approach 1:
The patent achieves fine dissection precision by confining RF energy to a small focal zone (0.5-2mm diameter) using a needle electrode. This localized energy application allows precise cutting at the tip while leaving surrounding tissue intact, enabling fine dissection of neural structures and other sensitive tissues while maintaining effective resection capability.
4Object-affected harmful factors
If RF energy is used for cutting, then bleeding control is improved, but smoke generation increases
Solution Approach 1:
The needle electrode confines RF energy to a small treatment zone, producing minimal smoke compared to conventional electrosurgical devices. The localized energy application generates sufficient heat for both cutting and coagulation while minimizing vaporization of tissue and fluid, thereby reducing smoke generation while maintaining effective bleeding control.
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 efficient, precise, and controlled cutting of nerve and soft tissue with reduced collateral damage, facilitating safer and more effective tissue removal during both minimally invasive and open surgical procedures.
Implementation Method 1
A vacuum attachment may be disposed at the proximal end of the elongated shaft to produce suction to facilitate removal of tissue from the cavity
Implementation Method 2
At the point of contact of the electric arcs with tissue, rapid tissue heating occurs due to high current density between the electrode and tissue
Implementation Method 3
rapid tissue heating occurs due to high current density between the electrode and tissue. This high current density causes cellular fluids to rapidly vaporize into steam
Implementation Method 4
Radio frequency energy controls bleeding by coagulating small blood vessels
Data Source
AI summary
A cutting device includes an elongated shaft that extends between a proximal end and a distal end. A distal arm extends from the distal end of the elongated shaft. The distal arm includes an inner surface defining a cavity and an outer surface defining a blunt tip. At least one proximal arm extends from the distal end of the elongated shaft at a position proximal to the distal arm. The at least one proximal arm has an inner surface defining a cavity including a cutting portion configured to cut tissue.