Electroconductive polymer active medical catheter and preparation method thereof

Abstract

The invention discloses a preparation method for an electroconductive polymer active medical catheter. The method comprises the following steps: preparing an electroconductive polymer / carbon nanotubecomposite electrode film from a mixed dispersion liquid including an electroconductive polymer, carbon nanotubes, a first ionic liquid and water; preparing a hollow column from a polymer carrying an ionic liquid, and performing thermal swelling on the hollow column to absorb a second ionic liquid to obtain a hollow column-shaped electrolyte layer; and placing the obtained hollow column-shaped electrolyte layer between at least two electroconductive polymer / carbon nanotube composite electrode films to form a sandwich structure, and performing hot pressing on the sandwich structure to form the electroconductive polymer active medical catheter. The method realizes reversible driving response deformation by relying on reversible de-intercalation of active ions in an electrode material under the action of an external low voltage, so that the electroconductive polymer active medical catheter has an active bending and guiding function, and the preparation method of the electroconductive polymer active medical catheter is simple, and lower in costs, and has broad application prospects in the field of medical catheter materials.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a conductive polymer active medical catheter and a preparation method thereof. Background technique [0002] Interventional catheter, as an active and continuous surgical tool, can be accurately positioned during the operation and is less affected by blood flow, which means it has high stability. It has become the most basic and important device in the interventional diagnosis and treatment of cardiovascular and cerebrovascular diseases. Traditional interventional catheters are usually slender and flexible catheters, but because the shapes of human lumens such as heart chambers, blood vessels and digestive tracts are varied and even have many forks, the operator needs long-term training to control them to reach the target surgical area more freely; Catheters often cause serious damage to the inner wall of the lumen when they pass through the lumen with variable bends, and the small...

AI Technical Summary

Problems solved by technology

For example, catheters using rope-driven technology can provide greater energy, but due to the more complex structure, the size is often larger

The traditional rope-driven technology is complicated to operate, and it depends more on the doctor's proficiency in operation, so it is difficult to popularize it.

As the currently widely researched shape memory alloy driving technology, its main problems are hysteresis and time delay, which will prolong the operation time of interventional diagnosis and treatment; at the same time, the heat generated when the shape memory alloy deforms may cause discomfort to the patient

Another reason that limits the clinical application of shape memory alloy-driven catheters is that the research on shape memory alloy-driven catheter-guided robots generally lacks specific theoretical support, and the calculation of the relationship between bending stiffness and the size of catheter-guided robot parts is very complicated, which is difficult to apply to actual operations.

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