Central venous catheter and manufacturing method thereof

Abstract

The invention belongs to the technical field of medical instruments, and discloses a central venous catheter and a manufacturing method thereof. The central venous catheter comprises an inner layer and an outer layer which are formed in a double-layer co-extrusion mode, the inner layer is a polyurethane layer containing barium sulfate, the outer layer is a transparent polyurethane layer, and scalemarks are printed on the inner layer through laser marking. The manufacturing method comprises the steps: putting raw materials of the inner layer and the outer layer into different screw extruders respectively, manufacturing a polyurethane catheter of a double-layer structure through a double-layer co-extrusion process, and then subjecting the double-layer polyurethane catheter to laser markingprinting to obtain the central venous catheter. The bonding strength of the inner layer and the outer layer of the venous catheter is high, barium sulfate can be effectively prevented from being separated out, and the catheter has higher biocompatibility and medical safety. Meanwhile, the manufactured marks are finer and clearer and are easy to identify. Ink is not needed during printing, harm oftoxic substances to human bodies is reduced, and the risk that protrusions on the surface of the catheter are uneven and ink falls off is avoided.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a central venous catheter and a manufacturing method thereof. Background technique [0002] As a common medical device, the central venous catheter has been widely used in the diagnosis and treatment of diseases such as central venous pressure monitoring, blood volume maintenance, total parenteral nutrition, rescue drugs and therapeutic drug injection. Because it is generally inserted into the patient's vein by puncture technology, in order to ensure the accuracy of insertion, it is often necessary to monitor the shape and position of the venous catheter at any time during use. The current clinical monitoring method is usually to add a certain amount of contrast agent to the catheter manufacturing material. After the catheter is inserted into the human body, it relies on external auxiliary equipment to display the catheter image in real time to determine the c...

AI Technical Summary

Problems solved by technology

[0003] Looking at the existing single-layer or double-layer central venous catheters on the market, most of the scale markings are printed with ink. Although the process is simple, the resolution is low and it is difficult to identify. In addition, the adhesion is limited, and there is a risk of ink falling off. At the same time, when printing ink, the surface of the venous catheter is easy to form protrusions, which not only greatly reduces the smoothness of the catheter itself, is not conducive to the smooth insertion of the catheter, but also makes it easier for blood cells to adhere to the catheter and increase the probability of thrombosis; , the raw ink often contains a small amount of toxic substances, and in emergency treatment, some rescue medicines and therapeutic medicines take a long time to inject, and the catheter insertion time is as long as half a month. Hazard to human health, which can seriously affect the biocompatibility of the catheter

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