Shape-Memory Staple Delivery Device with Striking Mechanism
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Solution Overview
Problem
Existing medical stapling devices are not optimal for all surgical situations, particularly in securing grafts to other tissues or grafts, as they may not effectively penetrate dense or hardened substances.
Innovation Solution
A device for delivering shape-memory staples, featuring a striking mechanism to protrude staples, spiral release apertures, and a domed portion that moves between positions to facilitate staple deployment, allowing for effective penetration and secure attachment of grafts to tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional stapling devices are used, then the device structure is simple, but the staples cannot effectively penetrate dense or hardened substances
Solution Approach 1:
The staples are pre-formed with a compressed, low-profile configuration that allows them to be stored and delivered efficiently. Upon deployment, they automatically expand to their final shape, providing the necessary penetration force without requiring complex delivery mechanisms. This preliminary preparation resolves the contradiction by enabling high penetration force while maintaining simple device structure.
Solution Approach 2:
The staples transition from a static, compressed state during delivery to a dynamic, expanded state during deployment. This dynamic transformation allows the staples to adapt their shape and force characteristics based on operational requirements, achieving effective penetration of dense substances while keeping the delivery device structure simple.
2Force
If staples are designed to protrude for penetration, then penetration capability improves, but control over staple deployment becomes more difficult
Solution Approach 1:
The staple deployment occurs in distinct periodic stages: initially compressed for delivery, then expanded upon release to provide penetration force, and finally secured in the deployed position. This periodic transformation sequence provides controlled deployment while maintaining the necessary penetration capability at the appropriate stage.
Solution Approach 2:
A controlled release mechanism acts as an intermediary between the compressed staple storage state and the expanded penetration state. This intermediary component regulates the transformation timing and force application, ensuring that staples protrude with sufficient force while maintaining ease of operation through controlled deployment.
3Force
If shape-memory staples are used, then penetration of dense substances is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The staples utilize shape-memory alloy properties that allow them to be manufactured in a compressed state and then transformed to an expanded state through temperature or stress-induced parameter changes. This parameter transformation capability enables penetration of dense substances while the manufacturing process remains relatively simple, as it leverages inherent material properties rather than complex fabrication techniques.
Solution Approach 2:
The staples are made from shape-memory alloy materials that combine multiple functional properties (elasticity, memory, transformation capability) into a single material system. This composite material approach achieves high penetration force while simplifying the overall manufacturing process by eliminating the need for complex assembly of multiple components.
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 enables efficient and secure attachment of grafts to tissues by allowing staples to protrude and penetrate dense substances, improving the quality of medical stapling by ensuring proper deployment and secure fixation.
Implementation Method 1
shape-memory staples
Implementation Method 2
The striking may cause the one end of each staple to further protrude
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
Some embodiments relate to a device for delivering shape-memory staples. The device comprises a grippable portion comprising a first actuator; and a delivery portion coupled to the grippable portion. The delivery portion comprises retention walls for retaining the staples within the delivery portion in an elastically deformed configuration and release apertures for releasing the staples to adopt a deployed configuration based on their shape memory. The delivery portion is configured to cause one end of each staple to protrude from the delivery portion in response to actuation of the first actuator. In some embodiments a striking mechanism is coupled to the grippable portion and configured to communicate a striking blow to the delivery portion.