Degradable Hemostatic Clip Structure With Metal Support Strength
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Solution Overview
Problem
Current hemostatic clips, both non-degradable metal and degradable polymer, face issues such as ion dissolution inflammation from metal clips and insufficient mechanical strength and high cost from polymer clips, necessitating a structural design with improved material properties.
Innovation Solution
A disposable hemostatic clip composed of degradable clips and metal components, utilizing Poly-L-lactic acid for the degradable parts and stainless steel for mechanical support, with a design that ensures complete degradation and enhanced mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If non-degradable metal materials (titanium alloy) are used for hemostatic clips, then mechanical strength is improved, but ion dissolution inflammation and permanent retention problems occur
Solution Approach 1:
The patent changes the material parameter from non-degradable metal to degradable polymer (polymer hemostatic clip), transforming the clip's ability to degrade in the body over time. This resolves the contradiction by eliminating permanent retention and ion dissolution issues while maintaining adequate mechanical strength through the selected polymer material and structural design.
Solution Approach 2:
The patent employs composite material strategy by using polymer materials with specific properties (absorbable polymer) that combine biocompatibility, adequate mechanical strength, and degradation capability. The composite approach integrates multiple functional properties into a single material system that balances strength requirements with biodegradability.
2Object-affected harmful factors
If degradable polymer materials are used for hemostatic clips, then biocompatibility and degradation are improved, but mechanical strength becomes insufficient
Solution Approach 1:
The patent optimizes polymer material parameters by selecting specific polymer types and controlling molecular weight (e.g., poly-L-lactic acid with molecular weight of 220,000-350,000). This parameter optimization enhances the mechanical strength of the degradable polymer while maintaining its biocompatibility and degradation properties, resolving the strength insufficiency issue.
Solution Approach 2:
The patent designs the hemostatic clip structure to dynamically utilize the polymer's mechanical properties during different phases: high strength during clamping operation, and controlled degradation after function completion. The structural design ensures adequate holding time by optimizing the relationship between material properties and geometric configuration.
3Object-affected harmful factors
If degradable polymer materials are used for hemostatic clips, then biocompatibility is improved, but product cost becomes too high
Solution Approach 1:
The patent adopts a disposable single-use design for the polymer hemostatic clip, eliminating the need for expensive sterilization, storage, and reprocessing infrastructure. The clip is designed for one-time use and then discarded, reducing overall system cost while maintaining biocompatibility. This disposable approach makes degradable materials more economically viable.
Solution Approach 2:
The patent optimizes manufacturing parameters by controlling polymer molecular weight ranges and using established manufacturing processes for medical devices. By standardizing material specifications and production methods, the patent reduces manufacturing complexity and cost while ensuring consistent biocompatible performance.
4Object-affected harmful factors
If degradable polymer materials are used for hemostatic clips, then degradation capability is improved, but holding time becomes limited
Solution Approach 1:
The patent precisely controls the polymer material parameters, particularly molecular weight (220,000-350,000) and composition, to achieve optimal balance between degradation rate and holding time. By adjusting these parameters, the clip maintains adequate mechanical strength for the required holding period while ensuring complete degradation afterward, resolving the contradiction between degradation capability and holding time.
Solution Approach 2:
The patent designs the clip structure to dynamically maintain mechanical integrity during the holding phase, then transition to degradation mode after function completion. The structural configuration ensures that the clip provides adequate holding force throughout the required period, then degrades at a controlled rate, optimizing the time-dependent performance.
Data Source
Figure 1
Figure 2A~2B
Figure 3~5A
AI summary
The present invention discloses a disposable degradable hemostatic clip, comprising two degradable clips, a pulling bracket, a hook handle and a degradable sleeve. The degradable clips are respectively arranged on two front portions of the pulling bracket; a lower part of the pulling bracket hooks with a front portion of the hook handle; and the pulling bracket and the hook handle are assembled in the degradable sleeve. The degradable clip and the degradable sleeve are made by using a degradable material, so that all the parts of the hemostatic clip retained in the body are degradable. At the same time, the disposable degradable hemostatic clip also provides a metal part used in combination with a degradable part, thereby achieving separation and retention of a degradable clip portion, and improving the mechanical strength of the disposable degradable hemostatic clip during operation.