Tube Pinch Fixation for Implantable Device Migration
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Solution Overview
Problem
Implantable medical devices face migration issues due to internal forces, which can lead to their displacement from the intended implantation location, necessitating effective fixation mechanisms to secure them within the patient's body.
Innovation Solution
The use of a fixation member attached to an implantable medical device via a tube that is plastically deformed to pinch the fixation member within a hollow space, providing a secure anchoring mechanism to prevent device migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixation members are attached to implantable medical devices, then device stability and prevention of migration is improved, but device complexity and manufacturing difficulty increases
Solution Approach 1:
The fixation member is inserted into a hollow space within the tube, creating a nested configuration where the fixation member is contained within the tube structure. This nesting approach provides secure attachment while maintaining a compact overall device form factor.
Solution Approach 2:
The tube is pre-formed with a hollow space configured to receive the fixation member before implantation. The plastic deformation mechanism is pre-designed into the tube structure, allowing the fixation member to be secured through a straightforward insertion and deformation process rather than requiring complex assembly steps.
2Strength
If a tube is plastically deformed to pinch the fixation member, then secure anchoring is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The tube undergoes plastic deformation to change its physical parameters, transitioning from a flexible state during insertion to a rigid pinched state that secures the fixation member. This parameter change allows the tube to adapt its properties based on the operational requirements at different stages.
Solution Approach 2:
The tube exhibits dynamic behavior, being flexible and deformable during the insertion phase to accommodate the fixation member, then becoming rigid and stable after plastic deformation to provide secure anchoring. This dynamic transition allows the same component to fulfill multiple functional requirements.
3Duration of action of stationary object
If fixation members are used to prevent migration, then long-term stability is improved, but device complexity increases
Solution Approach 1:
The fixation member and tube are combined into an integrated attachment mechanism where the tube serves dual purposes: as a delivery vehicle for the fixation member and as the anchoring structure itself after deformation. This merging reduces the number of separate components and simplifies the overall device architecture.
Solution Approach 2:
The tube performs self-service by using its own material properties and plastic deformation capability to create the anchoring function. The tube deforms itself to pinch and secure the fixation member without requiring external fastening mechanisms or additional securing components, thereby reducing overall device complexity.
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
This solution effectively secures implantable medical devices, such as sensors and pacemakers, by preventing migration and ensuring stable positioning within the patient's body, thereby maintaining the device's functionality and therapeutic effectiveness.
Implementation Method 1
The tube is connected to the body and plastically deformed to pinch the fixation member within a hollow space of the tube
Data Source
AI summary
A fixation member configured to anchor an implantable medical device within a patient is attached to an implantable medical device by introducing at least a portion of the fixation member in a tube mechanically connected to the medical device, and plastically deforming the tube in order to pinch the fixation member within a hollow space of the tube.