PTFE safety coating on the surface of medical guidewire

PTFE coating has an extremely low friction coefficient, good biocompatibility, and a relatively smooth product surface. Applying PTFE coating on the surface of medical guidewires can make the guidewires move more smoothly in human blood vessels, cavities and other tissues. This not only helps doctors to manipulate the guidewires more easily and accurately guide them to the lesion site, but also reduces damage to tissues, reduces patients' pain during surgery and the risk of postoperative complications.

The need for PTFE (polytetrafluoroethylene) coating on medical guidewires is mainly based on its excellent performance, which can significantly improve the safety, effectiveness and applicability of guidewires in medical applications.

Spraying PTFE (polytetrafluoroethylene) solution coating on the surface of medical guidewire can play the following roles:

● Reduce friction coefficient: PTFE has an extremely low friction coefficient, which can make the guidewire move more smoothly in human tissues such as blood vessels, reduce damage to tissues, reduce operation difficulty and patient discomfort.

● Good biocompatibility: PTFE has excellent biocompatibility and does not cause immune response or other adverse reactions in the human body, which can ensure the safety of guidewires in the human body.

● Chemical stability: It can resist the erosion of chemical substances such as secretions and blood in the human body, ensuring the stable performance of the guidewire during use.

● Corrosion resistance: It can prevent the guidewire from being corroded by body fluids, etc., extend the service life of the guidewire, and ensure its reliability in the body.

There are several main ways to prepare PTFE solution coatings:

● Dip coating: immerse the guide wire in PTFE solution, make the solution evenly adhere to the surface of the guide wire, and then evaporate the solvent by heating and other means to form a PTFE coating. This method is simple to operate and suitable for large-scale production, but the control of coating thickness is relatively difficult, and uneven coating thickness may occur.

● Spray gun method: Use a spray gun to spray PTFE solution on the surface of the guide wire. Due to the value of medical solutions, excessive spray gun pressure will result in excessive waste of solution, causing pollution around the equipment and making it difficult to clean and maintain.

● Ultrasonic spraying technology uses the high-frequency vibration of the ultrasonic nozzle to atomize the PTFE solution into tiny particles, and then spray the atomized particles onto the surface of the guide wire through drainage. Compared with traditional spraying technology, it can achieve high-precision coating, save solution, reduce pollution to the environment, and the prepared coating is dense and has good bonding force.