Helicoidal Member Insertion Guide With Cryoadhesive Tissue Fixation
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Solution Overview
Problem
Existing surgical procedures face challenges in inserting helicoidal members into tissue with their longitudinal axis parallel to the tissue surface, particularly in minimally invasive procedures like transcatheter interventions, due to difficulties in immobilizing the instrument during insertion.
Innovation Solution
A system and method utilizing a guide with a cooled peripheral surface that adheres to the tissue, allowing a helicoidal member to be inserted while remaining fixed relative to the tissue, using a driver to rotate and advance the member along the guide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a helicoidal member is inserted with its longitudinal axis parallel to the tissue surface in minimally invasive procedures, then the surgical access and trauma reduction are improved, but the instrument immobilization becomes very difficult due to forces and torques during insertion
Solution Approach 1:
A guide element is introduced as an intermediary component between the insertion instrument and the helicoidal member. The guide element is first fixed to the tissue surface, providing a stable reference frame. The helicoidal member is then inserted along this guide, which constrains its path and orientation. This mediator allows precise control of the helicoidal member's insertion trajectory without requiring the main instrument to remain fixed against significant forces and torques.
Solution Approach 2:
The guide element is preliminarily fixed to the tissue surface before the helicoidal member insertion begins. This preliminary action establishes a stable foundation and predetermined path for the subsequent insertion process. By preparing the guide element in advance at the desired insertion location, the system enables accurate placement of the helicoidal member without requiring complex real-time instrument stabilization.
2Stability of the object's composition
If the guide peripheral surface is cooled to cause adhesion to the tissue, then the guide fixation stability is improved, but the tissue may suffer thermal damage
Solution Approach 1:
The cooling of the guide peripheral surface is applied periodically or in controlled pulses rather than continuously. The cooling subsystem activates to create adhesion when needed for stable fixation during insertion, then deactivates or reduces cooling to prevent excessive thermal accumulation in the tissue. This periodic thermal action allows the guide to achieve secure attachment while limiting the duration of thermal exposure to safe levels.
Solution Approach 2:
The temperature parameter of the guide peripheral surface is dynamically adjusted during the procedure. The cooling subsystem modulates the temperature to achieve the optimal balance between adhesion strength for stable fixation and thermal safety for the tissue. By controlling the temperature parameter within a specific range, the system ensures sufficient adhesion while preventing tissue damage.
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
Enables secure and controlled insertion of helicoidal members into biological tissues, facilitating minimally invasive surgeries by maintaining the guide's fixation to the tissue, thereby improving procedural accuracy and reducing trauma.
Implementation Method 1
a cooling subsystem operatively coupled to the guide for selectively cooling the peripheral surface cooled portion to a temperature sufficiently low to cause adhesion between the guide and the target biological tissue
Data Source
AI summary
A system using a guide to assist in insertion of a helicoidal member in a target biological tissue. The system adheres to tissues using suction to allow insertion of the helicoidal member.