Absorbable Screw Fixing Device for Soft Tissue
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Solution Overview
Problem
Conventional fixing devices for soft tissue in laparoscopic hernia repair are complex, costly, and can cause tissue injury due to their structure and material, leading to increased risk of adhesion and infection.
Innovation Solution
A fixing device comprising an absorbable screw or titanium screw with a lubricant coating and a mechanism involving a handle, extension spring, trigger, helical gears, and a screw tube, allowing for smooth and reliable operation with reduced tissue friction and infection risk, utilizing degradable materials and titanium alloys for enhanced biocompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fixing devices are used for soft tissue in laparoscopic hernia repair, then the fixing function is achieved, but the device structure becomes complex and costly
Solution Approach 1:
The patent extracts the essential fixing function from complex conventional devices by using a simple absorbable screw mechanism. The screw is inserted through a needle-like catheter, eliminating the need for complex stapling or nailing mechanisms while achieving reliable fixing of the mesh to the abdominal wall.
Solution Approach 2:
The patent employs disposable absorbable screws made from biodegradable materials that dissolve after performing their fixing function. This eliminates the need for complex reusable mechanisms, reducing device complexity and cost while maintaining reliable fixing during the healing period.
2Strength
If conventional fixing devices with metal structures are used, then strong fixing capability is achieved, but tissue injury and adhesion risk increase
Solution Approach 1:
The patent changes the material parameter from permanent metal to absorbable biodegradable materials. The absorbable screws maintain sufficient strength during the healing period to provide reliable fixing, then gradually dissolve without causing tissue injury or adhesion, eliminating the harmful effects of permanent metal implants.
Solution Approach 2:
The patent uses composite absorbable materials that combine the necessary mechanical strength for fixing with biocompatibility and degradability. The absorbable screws are made from materials like poly(lactic-co-glycolic acid) that provide temporary structural support and then safely dissolve, avoiding the tissue injury associated with conventional metal fixtures.
3Object-affected harmful factors
If absorbable screws are used, then biocompatibility and reduced tissue injury are achieved, but the screw material must be degradable
Solution Approach 1:
The patent carefully controls the degradation parameters of the absorbable screw materials. The material is designed to degrade at an appropriate rate during the healing process, maintaining structural integrity when needed and safely dissolving afterward. This balances biocompatibility with controlled material stability.
4Ease of operation
If a lubricant coating is applied to the catheter, then tissue friction is reduced and operation becomes smoother, but the coating adds manufacturing complexity
Solution Approach 1:
The patent applies a lubricant coating to the catheter surface to reduce friction during insertion and operation. This simple coating approach, rather than complex mechanical modifications, enables smoother operation while the coating itself is a straightforward manufacturing step that can be applied through standard surface treatment processes.
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 device provides anti-adhesion properties, facilitates convenient and reliable operation, and reduces the risk of infection and tissue injury, making it suitable for laparoscopic hernia repair with potential for repeated use and improved patient recovery.
Implementation Method 1
an extension spring, a trigger, a driving gear, a large helical gear, a small helical gear, a screw tube and a driving rod; wherein a first end of the extension spring is mounted on a fixing column on an internal wall of the handle
Implementation Method 2
A fixing device comprising an absorbable screw or titanium screw with a lubricant coating and a mechanism involving a handle, extension spring, trigger, helical gears, and a screw tube, allowing for smooth and reliable operation with reduced tissue friction
Data Source
AI summary
A fixing device for soft tissue includes: a driving device, screw tube and a drive rod. A catheter is connected with the screw tube by screw thread, and a plurality of absorbable screws or titanium screws are provided in the catheter. A screw thread structure is formed on a nailed beam of each of the absorbable screws, and a lead spring is provided on each of the absorbable screws. The plurality of absorbable screws or titanium screws are connected in series and provided in the catheter with a spiral groove in a head-to-nail sequence. When used, by pulling the trigger, the driving rod is rotated driven by the driving device, in such a manner that the absorbable screw or the titanium screw can be shot out of the catheter one by one. The fixing device of the present invention has characteristics of anti-adhesion, convenient and reliable operation.