Disposable Hemostatic Clip With Memory Strip for Fatigue Resistance
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Solution Overview
Problem
Hemostatic clips made of plastic suffer from fatigue and structural defects, leading to improper fitting or detachment during repeated use, which can cause operational failures in laparoscopic surgery.
Innovation Solution
A disposable hemostatic clip with a recovery device comprising a mounting groove and a recovery strip made of memory metal or non-metal material, integrated with a polytetrafluoroethylene body, featuring an arc-shaped groove and occluding protrusions for enhanced resilience and secure clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the curved root of the hemostatic clip is made of plastic, then the hemostatic clip can be manufactured with simple material, but the curved root will be prone to yield fatigue when continuously closed and opened
Solution Approach 1:
The patent applies composite materials by combining plastic for the hemostatic clip body with a recovery strip made of shape memory alloy or elastic alloy inserted into the curved root. This composite structure leverages the manufacturing simplicity of plastic while incorporating the fatigue resistance and elastic recovery properties of specialized alloys, thereby resolving the contradiction between ease of manufacture and resistance to yield fatigue.
Solution Approach 2:
The patent changes the material parameters of the curved root by introducing a recovery strip with specific elastic modulus and shape memory characteristics. This parameter change enables the curved root to maintain its geometric integrity and elastic force over repeated operations, improving reliability without compromising the overall manufacturability of the device.
2Ease of manufacture
If plastic materials are used for the hemostatic clip, then manufacturing is simplified, but tissue defects occur leading to improper fitting or detachment
Solution Approach 1:
The patent uses composite materials by integrating a recovery strip made of shape memory alloy or elastic alloy into the plastic hemostatic clip structure. This combination maintains the manufacturing simplicity of plastic while adding the precision and consistency of alloy materials, ensuring proper fitting and preventing detachment.
Solution Approach 2:
The patent modifies the physical parameters of the curved root region by inserting a recovery strip with controlled elastic properties and shape memory characteristics. This parameter change ensures consistent elastic force and precise geometric recovery, thereby improving fitting accuracy and preventing manufacturing defects related to improper fitting or detachment.
3Device complexity
If the curved root is made of plastic, then the overall structure remains simple, but the elastic force deteriorates during repeated operations
Solution Approach 1:
The patent applies composite materials by combining the simple plastic structure of the hemostatic clip with a specialized recovery strip made of shape memory alloy or elastic alloy. This composite approach maintains structural simplicity while significantly improving elastic force consistency through the superior mechanical properties of the alloy recovery strip.
Solution Approach 2:
The patent extracts the elastic recovery function from the plastic material and assigns it to a dedicated recovery strip component. This extraction allows the main plastic structure to remain simple while the specialized recovery strip provides consistent elastic force, resolving the contradiction between structural simplicity and force consistency.
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 use of memory metal or non-metal recovery strips ensures consistent elastic force and secure clamping, preventing structural defects and ensuring reliable operation of the hemostatic clip.
Implementation Method 1
The recovery strip of memory metal or non-metal material has a strong yield memory, which can ensure that the elastic force between the upper clamping arm and the lower clamping arm remains unchanged when the hemostatic clip body is continuously closed and opened
Implementation Method 2
The recovery strip is made of memory metal or non-metal material. The recovery strip of memory metal or non-metal material has a strong yield memory
Data Source
AI summary
The invention discloses a new disposable hemostatic clip, comprising a hemostatic clip, wherein the hemostatic clip is composed of a fixing hook, an upper clamping arm, a curved root, a lower clamping arm, a limiting block and a fixing cylindrical block; the hemostatic clip body is provided with a recovery device inside. In the invention, a recovery strip of memory metal or non-metal material is inserted into the upper clamping arm, the curved root and the lower clamping arm to replace the yielding part in the curved root of the original hemostatic clip. The recovery strip of memory metal or non-metal material has a strong yield memory, which can ensure that the elastic force between the upper clamping arm and the lower clamping arm remains unchanged when the hemostatic clip body is continuously closed and opened.