Flexible Medical Scissors with Adjustable Shearing Mechanism
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Solution Overview
Problem
Conventional surgical scissors pose a risk during lesion removal due to the presence of important vascular nerves, leading to poor surgical outcomes as they lack the flexibility to effectively navigate and bypass these structures.
Innovation Solution
The development of flexible medical scissors with a lifting mechanism, adjustable shearing mechanism, and a flexible sleeve made of medical silicone rubber, allowing for precise angle adjustments and bending to bypass vital blood vessels and nerves, facilitated by a combination of stainless steel, PP plastic, and silicone components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rigid surgical scissors are used, then the structure is simple and easy to manufacture, but the scissors cannot navigate through natural body tissue gaps and bypass vital blood vessels and nerves
Solution Approach 1:
The scissors are divided into multiple segments including a flexible sleeve with multiple connecting plates, sliding columns, and rotating shafts that can move relative to each other, enabling the instrument to bend and navigate through complex tissue pathways while maintaining structural integrity
Solution Approach 2:
The scissors incorporate dynamic adjustment mechanisms with sliding columns that can move along guide grooves, rotating shafts for angular adjustment, and telescopic pull wires that allow real-time modification of the flexible sleeve's configuration to adapt to different surgical pathways and tissue geometries
2Reliability
If the scissors are made rigid for structural stability, then manufacturing is easier, but the risk of damaging important vascular nerves increases
Solution Approach 1:
A flexible sleeve made of medical silicone rubber covers the adjusting mechanisms and connecting plates, providing a biocompatible, flexible exterior that allows the rigid internal components to move and bend safely through tissue gaps while protecting surrounding structures from damage
Solution Approach 2:
The scissors combine multiple materials including medical silicone rubber for the flexible sleeve, stainless steel for the cutting blades and structural components, and PP plastic for the handle, creating a composite structure that balances flexibility, strength, and manufacturability
3Ease of operation
If the scissors cannot be adjusted to different angles, then the structure is simpler, but the ability to reach lesions through natural tissue gaps is reduced
Solution Approach 1:
Telescopic pull wires act as intermediaries that transmit force from the handle to the connecting plates and rotating shafts, enabling angle adjustments without requiring complex mechanical linkages or motors within the flexible sleeve itself
Solution Approach 2:
The adjusting mechanisms are designed to be operated directly by the surgeon through the handle, with sliding columns that move along guide grooves and rotating shafts that can be manually positioned, allowing real-time adjustment without requiring additional actuators or complex control systems
Data Source
AI summary
The present disclosure provides flexible medical scissors, including a main body, a lifting mechanism, an adjusting mechanism, a flexible sleeve, and a shearing mechanism. The flexible medical scissors provide the lifting mechanism at a top of a handle, the finger sleeve in the lifting mechanism sleeves a ring finger of a user, when using, the finger sleeve is pulled to enable the pull rope to pull the rotating shaft, and the rotating shaft drives the movable cutter to rotate, so that a shearing function is realized. The adjusting mechanism is disposed at a bottom of the handle, three groups of sliding grooves are formed in the adjusting mechanism, and sliding columns are respectively disposed in the sliding grooves.