Tissue Puncture Closure Device Automatic Tamping Mechanism
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Solution Overview
Problem
Existing tissue puncture closure devices require manual tamping of sealing plugs after sheath removal, which can lead to partial seals and bleeding due to potential retraction of the plug, necessitating an improvement in deployment mechanisms.
Innovation Solution
A tissue puncture closure device with an automatic driving mechanism that includes a transducer, such as a spool and gear system or motor, to tamp the sealing plug upon withdrawal, ensuring consistent and complete sealing without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual tamping is used after sheath removal, then the sealing plug can be placed at the tissue puncture site, but the sealing plug may be retracted causing partial seal and bleeding
Solution Approach 1:
The automatic tamping mechanism performs the tamping action immediately upon sheath removal while the sealing plug is still in position, eliminating the time delay and manual intervention that could allow plug retraction. The system automatically activates the tamping force through the transducer as soon as the sheath is removed, ensuring the plug is secured before any retraction can occur.
Solution Approach 2:
The device performs self-tamping through an automatic driving mechanism that activates upon sheath removal. The transducer automatically generates tamping force without requiring manual intervention, making the system self-sufficient and eliminating the reliability issues associated with manual operation timing.
2Reliability
If automatic tamping mechanism is added, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical tamping mechanisms with a transducer-based system that can be activated electronically or mechanically upon sheath removal. This substitution simplifies the overall device architecture while maintaining automatic tamping functionality, reducing the complexity of mechanical linkages and moving parts.
Solution Approach 2:
The transducer serves multiple functions: it stores energy, generates tamping force, and can be integrated with the deployment mechanism. This multi-functionality reduces the need for separate components, thereby reducing overall device complexity while maintaining the automatic tamping capability that improves sealing reliability.
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 automatic tamping mechanism ensures immediate and effective hemostasis by maintaining contact between the sealing plug and anchor, reducing gaps and bleeding, and providing a reliable seal during tissue puncture closure.
Implementation Method 1
a gear engaged with the spool, and a tamping tube driver directly or indirectly driven by the gear. The spool rotates and drives the gear, and the gear drives the tamping tube driver
Implementation Method 2
A torque-limiting clutch may be disposed between the spool and the gear according to some embodiments
Implementation Method 3
an electronic switch at the proximal end of the closure device and a motor operatively connected to the electronic switch. Retraction of the closure device from the tissue puncture trips the electronic switch and activates the motor to generate the tamping force on the seal plug. The motor may include, for example, a servo or solenoid that actuates a linear tamping force on the seal plug
Data Source
AI summary
A method and apparatus for sealing a puncture or incision formed percutaneously in tissue separating two internal portions of the body of a living being with an anchor, a sealing plug and a filament connecting the anchor and sealing plug. The method and apparatus provide for automatic tamping and/or cinching of the sealing plug when the apparatus is withdrawn from the puncture site. The automatic tamping and/or cinching is facilitated by transducing a motive force generated by the withdrawal of the apparatus into a tamping and/or cinching force.