Grasping Jaw Thermal Conduction Segmentation for Tissue Cutting and Coagulation
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Solution Overview
Problem
Existing grasping treatment instruments face challenges in efficiently cutting and coagulating biological tissues of varying diameters and types due to limitations in heat transfer and pressure distribution between jaws, leading to incomplete cutting and potential bleeding.
Innovation Solution
A grasping treatment unit with a first jaw featuring a projection portion and thermal conduction portions of different thermal conductivities, where the first thermal conduction portion is used for cutting and the second thermal conduction portion for coagulation, allowing for precise heat transfer and pressure application to cut and seal tissues effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single heating portion is used in the jaw, then the structure is simple, but the ability to perform both cutting and coagulation efficiently is insufficient
Solution Approach 1:
The heating portion is divided into multiple independent heating sections (first heating portion and second heating portion) with different thermal conductivities. The first heating portion has high thermal conductivity for efficient cutting, while the second heating portion has low thermal conductivity for effective coagulation. This segmentation allows the single jaw structure to perform multiple treatment functions simultaneously.
Solution Approach 2:
Different regions of the heating portion are assigned different thermal conductivity properties to perform different functions. The first heating portion (with higher thermal conductivity) is positioned for cutting operations, while the second heating portion (with lower thermal conductivity) is positioned for coagulation operations. This local differentiation of thermal properties enables versatile treatment capabilities within a unified structure.
2Device complexity
If uniform heat distribution is applied across the grasping surface, then the structure is simple, but the precision of cutting and coagulation treatment is insufficient
Solution Approach 1:
The grasping surface incorporates multiple heating portions with spatially varying thermal conductivities. The first heating portion (high thermal conductivity) provides concentrated heat for precise cutting at the contact point, while the second heating portion (low thermal conductivity) provides controlled heat diffusion for precise coagulation at adjacent areas. This local differentiation of thermal properties enables precise control over treatment zones.
3Device complexity
If pressure is distributed evenly across the jaw surface, then the structure is simple, but the efficiency of heat transfer to the tissue is insufficient
Solution Approach 1:
The jaw structure integrates multiple heating portions with different thermal conductivities that correspond to different pressure application zones. The high thermal conductivity first heating portion is positioned where focused pressure is applied for cutting, maximizing heat transfer efficiency at the cut site. The low thermal conductivity second heating portion is positioned where distributed pressure is applied for coagulation, ensuring adequate heat transfer while preventing excessive heat loss to surrounding tissues.
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 solution enables efficient cutting and coagulation of tissues by varying thermal conductivity along the projection portion, ensuring complete cutting and minimizing bleeding by forming effective seal margins, regardless of tissue diameter or type.
Implementation Method 1
a first thermal conduction portion provided in the projection portion; and a second thermal conduction portion being continuous with a distal portion side of the first thermal conduction portion in the projection portion, and configured such that heat is directly conductible between the second thermal conduction portion and the first thermal conduction portion, the second thermal conduction portion having a thermal conductivity which is different from a thermal conductivity of the first thermal conduction portion
Data Source
AI summary
A grasping surface opposed to a second jaw is provided on an outer surface in a first jaw of the grasping treatment unit, and a heat applying portion applying heat to a treated target is provided in a grasping-surface-side part in the first jaw. The heat applying portion includes a projection portion in which the grasping surface projects toward the second jaw, and the projection portion includes a first thermal conduction portion, and a second thermal conduction portion with a thermal conductivity which is different from that of the first thermal conduction portion. The second thermal conduction portion is continuous with the first thermal conduction portion in a longitudinal direction of the first jaw.