a. Ordinary catheter
Ordinary catheter for a certain length of plastic tube, the front end of the thinning to facilitate the insertion of blood vessels; tail and the end of the needle the same end of the syringe in order to facilitate the connection with the syringe. The anterior portion of the common catheter has various shapes, such as single arc, reverse arc, double arc, reinforced double arc, hepatic arc frontal view, hepatic arc lateral view, triple arc, etc., to facilitate the insertion of blood vessels in different parts of the body. The specification of the catheter is often used to express the F number, such as 6F or 7F, etc. The F number is equal to the number of millimeters of the outer circumference of the catheter.
b. Special catheters
Special catheters are relatively complex in character and structure, and the medical functions they fulfill are also diverse. They include balloon catheters and other catheters. Balloon catheter is the most widely used type of catheter, including ordinary double-lumen single balloon catheter, double-lumen bilobed balloon catheter, double-lumen trilobed balloon catheter, double-lumen single balloon catheter, four-lumen double balloon catheter (carotid artery angioplasty balloon catheter), detachable balloon catheter, balloon catheter with holes, coronary artery angioplasty balloon catheter, fast exchange balloon catheter, balloon catheter, the guidewire balloon catheter, the tip of the segment with fixed guide wire Balloon catheters, combined tandem balloon catheters (triple-lumen double-balloon), perfusion balloon catheters, laser balloon catheters), radiofrequency thermal balloon catheters (triple-lumen single-balloon catheters), and so on.
c. Sheaths
Sheaths, also known as catheter sheaths, are used to guide catheters, balloon catheters, or other endovascular devices into the vasculature smoothly. The sheath consists of an outer sheath, a dilator, and a short guidewire. There are four types of sheaths: ordinary sheaths, leak-proof sheaths, stripped catheter insertion sheaths, and long sheaths.
d. Commonly used precision medical catheters
Central venous catheters
Central venous catheters are generally made of medical-grade polyurethane, which has excellent biocompatibility. The catheter is clearly visible on X-ray and is fitted with a special flexible tip to minimize vascular damage. The central venous catheter is shown below
Uses of central venous catheters:
Continuous and intermittent intravenous infusions
Blood and blood product transfusions
Central venous pressure monitoring
Collection of blood specimens
Total parenteral intravenous nutrition
Dialysis catheter
A dialysis catheter is a catheter specifically designed for hemodialysis. Dialysis catheter is a kind of catheter specially used for hemodialysis, which provides a safe and effective channel for the connection between central venous catheter and dialyzer. Dialysis catheters are mostly made of medical grade polyurethane, which has high elasticity and excellent biocompatibility. The scientific design of lumen makes the catheters have good rigidity and small resistance to fluid flow; meanwhile, they are equipped with various types of catheters such as straight head, variable epithelial tubing, and curved tubing body for choice.
Hemodialysis tubing
Arterial catheter sheaths
Arterial catheter sheaths are mainly used to provide a safe and effective channel for catheter insertion into the human body
Multilumen drainage and electrode catheters
A variety of single-lumen and multilumen tubing is used in large quantities for drainage in clinical treatments, as well as the electrode sleeves for a wide range of high-frequency and low-frequency therapeutic equipment
.