Anchored Guidewire Textured Surface Anchoring
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Solution Overview
Problem
Existing guide wire devices face challenges such as migration during catheter insertion, lack of precise positioning, and inability to handle small bodily cavities due to slippage and complexity, especially with the smooth surface of inflatable balloons used for anchoring, which complicates sterilization and imaging feedback.
Innovation Solution
A guide wire with an expansion apparatus featuring a textured surface for secure anchoring, an integrated imaging device for precise positioning, and a pump system with sensors for controlled inflation, allowing for minimally traumatic insertion and removal of medical devices, including a check valve for maintaining inflation and a flexible design for navigating small diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a smooth-surfaced inflatable balloon is used for anchoring the guide wire, then the guide wire can be positioned in the body cavity, but the balloon tends to slip during catheter insertion and is difficult to sterilize
Solution Approach 1:
The patent applies a porous material coating on the outer surface of the expansion apparatus. This porous structure provides anchoring stability through tissue interlocking while the coating material itself can be sterilized, solving both the reliability and ease of manufacture contradictions.
Solution Approach 2:
The patent uses a composite structure combining the inflatable balloon material with a porous coating layer. This composite material approach maintains the inflatable anchoring mechanism while adding a sterilizable porous surface that prevents slippage during catheter insertion.
2Device complexity
If a traditional guide wire is used, then the device structure is simple, but the guide wire migrates during catheter insertion and cannot provide precise positioning
Solution Approach 1:
The patent inflates the expansion apparatus at the distal end of the guide wire before catheter insertion to pre-secure the guide wire in position. This preliminary anchoring action prevents migration during subsequent catheter manipulation while maintaining relative structural simplicity.
Solution Approach 2:
The patent divides the guide wire into functional segments: the elongated wire body for navigation and the separate expansion apparatus for anchoring. This segmentation allows the anchoring function to be activated only when needed, maintaining simplicity during navigation while providing stability during insertion.
3Ease of operation
If the guide wire is made stiff for precise manipulation, then the distal end can be controlled externally, but the guide wire cannot navigate convoluted passages through small vessels
Solution Approach 1:
The patent makes the guide wire dynamically adjustable in stiffness through the expansion apparatus. The wire remains flexible during navigation to follow convoluted passages, then becomes effectively stiff when the expansion apparatus is inflated to provide manipulation control during the insertion procedure.
Solution Approach 2:
The patent changes the physical parameters of the guide wire system by inflating the expansion apparatus. This parameter change (from deflated to inflated state) transitions the wire from a flexible navigation mode to a stabilized control mode, resolving the contradiction between flexibility and controllability.
4Reliability
If the expansion apparatus is inflated to prevent slippage, then anchoring stability improves, but the guide wire cannot be removed or adjusted
Solution Approach 1:
The patent uses periodic action by inflating the expansion apparatus only during the insertion phase when stability is needed, then deflating it for removal. This temporary, periodic inflation provides anchoring stability when required while maintaining ease of operation for removal and adjustment when needed.
Solution Approach 2:
The patent makes the anchoring state dynamic rather than permanent. The expansion apparatus can be inflated to create stable anchoring, then deflated to enable removal or adjustment, allowing the system to transition between stable and mobile states as needed during the procedure.
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 guide wire provides stable and precise placement of medical devices within bodily cavities, minimizing tissue damage and improving navigation through small vessels, with enhanced imaging feedback and adjustable pressure for secure anchoring, addressing the limitations of previous devices.
Implementation Method 1
a pump that supplies fluid to the lumen to inflate the at least one expansion apparatus
Implementation Method 2
The outer surface of the expansion apparatus comprises a textured surface for preventing slippage of said outer surface on the surrounding tissue
Implementation Method 3
a check valve positioned at a proximal end of the elongated guide wire for maintaining the at least one expansion apparatus in an inflated position
Data Source
AI summary
An anchored guide wire is described including at least one expansion apparatus having an outer surface for contacting surrounding tissue, an elongated guide wire with at least one lumen for supplying fluid to the expansion apparatus, and a pump that supplies fluid to the lumen to inflate the expansion apparatus, wherein the outer surface of the expansion apparatus has a textured surface for preventing slippage on surrounding tissue. A method of securing a guide wire in a bodily cavity is also described including inserting an elongated guide wire with an expansion apparatus having a textured outer surface and a lumen for supplying fluid to the expansion apparatus, into the bodily cavity, supplying fluid to the lumen with a pump until the expansion apparatus is inflated, moving a medical device along the elongated guide wire, deflating the expansion apparatus, and withdrawing the guide wire from the bodily cavity.