Views:2 Author:Site Editor Publish Time: 2021-04-30 Origin:Site
Since the 1940s, central venous catheterization has been widely used clinically. The main uses of central venous catheter (Central Venous catheter, CVC) are:
1. Measure the central venous pressure to evaluate the physiological parameters of the circulation and estimate the amount of body fluid.
2. During surgery or emergency where the blood loss may be large, CVC can be used to infuse a large amount of rapid intravenous fluids to maintain blood pressure.
3. Long-term parenteral nutrition, long-term antibiotic injection, and long-term analgesic injection.
4. For more irritating drugs in peripheral veins (small veins), inject them from the central venous catheter. For example: Amiodarone and so on.
5. Tubes for hemodialysis, such as plasma exchange or dialysis.
6. Tumor chemotherapy to prevent the occurrence of chemical phlebitis and prevent the extravasation of liquid medicine.
7. Establish a good infusion channel for patients with repeated infusions to avoid the pain of repeated puncture.
CVC specification models have single cavity, double cavity, three cavity, even four cavity, different length, different diameter, etc. According to the length of stay in the body, there are peripheral central venous catheters, tunnel-type central venous catheters, implanted drug delivery devices (infusion ports) and so on. There are many options according to your needs. Among them, double-lumen central venous catheters are the most commonly used. The main reason is that when one lumen is used to measure central venous pressure, the other lumen can be used to replenish fluid or medication. If the drug has contraindications, there are also options for 3 or more cavities, but they are relatively rare.
It is worth mentioning that most of the central venous catheter tube materials are polyurethane (PU), which has excellent high-tension, high-tension, toughness and aging resistance. It is also resistant to oil, water, and mold, which is a mature environmental protection. material. However, this material is not resistant to tinctures, ketones, and ether organic solvents such as absolute ethanol and methanol. Some chemotherapeutics are insoluble in water and can only be dissolved in such organic solvents before adding glucose or saline. Diluted and infused into the patient's body, if such drugs are injected into the patient's body through an intravenous drip, this process often lasts for several hours, corroding the catheter and destroying its integrity. Pay special attention when using it. Also do not wrap the joints with alcohol gauze, so as not to damage the conduits at the joints.