Bioabsorbable Septal Occluder Locking Structure for Catheter Delivery
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Solution Overview
Problem
Existing medical materials for catheterization to treat atrial septal defects lack ease of operation and stability post-treatment, with a need for improved transition between locked and unlocked states.
Innovation Solution
A medical material with a tubular body and connecting parts that can reversibly or irreversibly transition between locked and unlocked states, featuring a bioabsorbable mesh structure, expandable connecting parts, and a mechanism to securely engage and disengage with a delivery cable, allowing easy and reliable placement at a treatment site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the medical material uses a complex locking mechanism to ensure stable locked and unlocked states, then the reliability of state transition is improved, but the device complexity increases
Solution Approach 1:
The connecting part is divided into distinct functional segments: an expansion section with radial expansion capability and a locking section with locking grooves. This segmentation allows each part to perform its specific function independently, achieving reliable state transitions without requiring a complex integrated mechanism.
Solution Approach 2:
The connecting part incorporates dynamic expansion and contraction capability through the expansion section, which can radially expand to engage locking grooves and contract to disengage them. This dynamic behavior enables reliable transitions between locked and unlocked states using simple structural changes rather than complex mechanical mechanisms.
2Ease of operation
If the medical material structure is simplified to improve ease of operation, then the ease of operation is improved, but the reliability of maintaining locked and unlocked states may worsen
Solution Approach 1:
The dynamic expansion and contraction of the connecting part provides inherently stable locked and unlocked states through geometric interlocking. The locking grooves and expansion section work together to create self-locking positions that maintain stability without requiring complex mechanical elements, thus preserving both ease of operation and reliability.
Solution Approach 2:
The connecting part automatically maintains its locked or unlocked state through the geometric configuration of the locking grooves and expansion section. Once expanded or contracted, the structure self-locks into position without requiring additional mechanisms or complex control systems, ensuring reliability while keeping the operation simple.
3Ease of operation
If the tube diameter of the middle portion is reduced to allow passage through the catheter, then the ease of insertion is improved, but the strength of the medical material may worsen
Solution Approach 1:
The tubular body is segmented into a middle portion for catheter passage and two tubular portions for functional performance. This segmentation allows the middle portion to be optimized for small diameter (ease of insertion) while the tubular portions maintain full structural strength for their intended functions.
Solution Approach 2:
Different sections of the tubular body have different diameter characteristics optimized for their specific functions. The middle portion has a reduced diameter for easy catheter passage, while the tubular portions have adequate diameter to maintain structural strength. This local quality differentiation resolves the contradiction between ease of insertion and structural strength.
Data Source
AI summary
A medical material makes it possible to perform less invasive treatment of atrial septal defect and is unlikely to cause problems in the late post-treatment period. A medical material includes a substantially middle portion and two tubular portions (first tubular portion, second tubular portion) having a mesh structure formed of a bioabsorbable linear material and includes a proximal connecting part connected to a first end and a distal connecting part connected to a second end and threaded to a delivery cable. The proximal connecting part and the distal connecting part are configured to reversibly or irreversibly achieve a locked state and an unlocked state, the locked state being a state in which the proximal connecting part and the distal connecting part remain united, the unlocked state being a state in which the proximal connecting part and the distal connecting part do not remain united. When the distal connecting part is inserted into the proximal connecting part, the engaging portion of the distal connecting part engages with the engaged portion of the proximal connecting part to cause the medical material to transition from the unlocked state to the locked state.