Microwave Tissue Dissection and Coagulation Instrument
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Solution Overview
Problem
Current surgical procedures face challenges in controlling bleeding during tissue dissection, leading to increased operative times and suboptimal outcomes due to the need to manage bleeding, which diverts attention from the primary surgical objective.
Innovation Solution
A handheld surgical device utilizing a directional microwave radiating assembly with a blade and coaxial feed line for simultaneous tissue coagulation and dissection, enabling targeted delivery of microwave energy to control bleeding while dissecting highly perfused organs like the liver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cutting instrument is used to resect tumors and necrotic lesions, then tissue dissection is achieved, but bleeding occurs that obscures the surgical view and increases operative time
Solution Approach 1:
The patent combines a microwave antenna assembly with a cutting blade into a single integrated instrument. The microwave radiating assembly delivers coagulation energy to tissue while the blade performs dissection, allowing simultaneous cutting and bleeding control in one surgical action, thereby reducing the need for separate coagulation steps and decreasing operative time
Solution Approach 2:
The microwave antenna assembly is positioned to deliver coagulation energy to tissue ahead of or concurrent with the blade's cutting path. This preliminary coagulation seals blood vessels before the blade severs them, preventing bleeding that would otherwise obscure the surgical view and require additional time to manage
2Use of energy by moving object
If conventional microwave antenna assemblies are used for tissue ablation, then energy delivery is achieved, but the antenna structure is complex and requires precise positioning
Solution Approach 1:
The microwave antenna assembly is segmented into modular components including a radiating element, dielectric material, and ground plane that can be independently designed and positioned. This segmentation allows each component to be optimized for its specific function while simplifying the overall construction and assembly process
Solution Approach 2:
The microwave antenna assembly is designed to perform multiple functions: it delivers coagulation energy to control bleeding, provides tissue ablation, and can be integrated with various cutting blade configurations. This multi-functionality reduces the need for separate specialized instruments, simplifying the surgical toolkit while maintaining effective energy delivery
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 allows for rapid coagulation and dissection, reducing operative times, decreasing risk factors, and improving patient outcomes by enabling concurrent tissue coagulation and dissection.
Implementation Method 1
A handheld surgical device utilizing a directional microwave radiating assembly
Implementation Method 2
microwave energy for simultaneous coagulation and dissection of tissue
Data Source
AI summary
A surgical instrument is configured to concurrently dissect and coagulate tissue. The surgical instrument includes a handle and a shaft extending distally from the handle. The shaft includes an outer hypotube, a lumen coaxially-disposed within the hypotube and extending beyond a distal end thereof, a coaxial feedline coaxially-disposed within the lumen, and having an inner conductor and an outer conductor disposed coaxially about the inner conductor, and a coolant tube coaxially-disposed between the lumen and the coaxial feedline to form an inflow conduit and an outflow conduit. The instrument further includes a dissecting head assembly coupled to a distal end of the shaft. The dissecting head assembly includes a dielectric core having a substantially planar radiating surface and at least one non-radiating surface, a reflective coating disposed on the at least one non-radiating surface of the dielectric core, and a blade extending from the radiating surface.