Guide wire spring introduction

Guide wire, also known as guide wire or guide wire, is one of the main tools for percutaneous puncture catheters. The guide wire plays a guiding and auxiliary role in the catheter, helping the catheter to enter the blood vessels and other cavities and guiding the catheter to reach the lesion smoothly. It's just as important as the catheter in catheterization.

I. Guide wire structure

The guide wire is composed of an inner and an outer part, and the outer part is wound with high quality stainless steel wire on the spring rotating bed. Steel wire needs to be smooth, tough, elastic, winding must be uniform and tight, arranged neatly, loose consistent. The spring should be able to withstand repeated bending and not break under a certain amount of force. The cavity in the center of the spring, that is, the interior of the guide wire, is equipped with a rigid steel core, the front end of which is gradually thinning. The tip of the very thin steel core is welded to the end of the spring, and then the tail of the core is welded to the end of the spring to make it polished and smooth, making it the simplest guide wire.

The so-called safety guide wire (SafetyGuideWire) spring center wire core in the spring shrink a few centimeters, not welded with the spring, so that the spring front more soft. Another safety wire with a diameter below 0. 1mm, parallel to the wire core, welded to the spring at one end to ensure that a section is not lost in the vessel due to the spring breaking. The guide wire is divided into two types: a fixed wire core, which is welded at the end of the spring, and a movable wire core, whose end is welded to the handle. It can be moved back and forth to change the hardness and shape of the front end of the guide wire. Some guides are coated with a very thin film of teflon to make the guides smoother and reduce the friction coefficient of the catheter. The Teflon sheath, which uses heparin to treat high-quality guide wire, has the ability to prevent both clotting and blood clotting.