Disposable medical catheter/guide wire products are widely used in clinical medicine. In medical clinical nursing, when the interventional diagnosis and treatment catheter enters the body, it will produce a series of reflections, such as blood coagulation performance, germ absorption performance, and Mechanism damage caused by friction.
Low friction on the surface of the catheter is very necessary. It not only protects the tissue from damage, but also reduces the damage to the surface of the catheter itself. It also greatly assists in increasing the life of the catheter. Excessive friction not only makes the patient suffer unbearable pain during the entire process of catheter insertion or withdrawal, but also makes it impossible for the beauty seeker to accurately manipulate the catheter during the actual operation of the catheter, which increases the difficulty of catheter placement, and even makes it very difficult. It may cause the unsuccessful whole process of intubation.
Therefore, in order to reduce the sliding friction when the catheter enters the body, reduce the patient’s pain, and achieve the effects of moisturizing, anti-infectives, anesthetics, etc., a coating is generally applied to the surface of the catheter. After the coating is resolved, the catheter generally has Different performance, the most extensive is the "super slippery" performance. Then, how to treat the rolling performance (namely surface sliding friction) of disposable medical catheter/guide wire coating is the key performance index that the catheter/guide wire manufacturing enterprise must be concerned about.
Testing standards and experimental equipment At this stage, the rolling performance testing of medical catheters can be tested with a testing instrument that meets the specifications of "YY/T 1536-2017 Non-capillary intravascular catheter surface rolling performance evaluation standard experimental entity model"; and disposable The inspection of hydrophilic coated guidewire can be carried out with reference to the experimental method required in the specification "T CAMDI 021—2019 Disposable Use of Hydrophilic Coated Guidewire". The larger sliding friction force of the hydrophilic coated guidewire should be low.于0.5N.
The experimental instrument can be the C610B catheter guide wire friction performance tester developed and manufactured by Labthink products. The machine equipment is a special tester developed by Labthink for customized product development for customers in the medical device industry. The technical expertise is suitable for urinary catheters. , Guide wire, balloon catheter, tracheal catheter, and other disposable non-capillary intravascular catheter guide wire surface friction and rolling performance testing. To comment on the "super-smooth" surface rolling performance of a disposable non-capillary intravascular catheter.
The C610B equipment complies with the YY/T 1536-2017 specification and supports the average sliding friction test of the frictional rolling characteristics of the catheter. At the same time, it will automatically statistically analyze the maximum value, minimum value, mean value, and standard deviation of several data information; High-precision intelligent PID temperature technology, completes the thermostatic water bath temperature control equipment that simulates the body temperature, and at the same time can carry out the detection under different temperature standards; selects the unique catheter clip support force system software, the force value is adjustable, Meet the test and inspection requirements; provide catheter clips (silicone gaskets and surgical pulse dampers) that meet the specified strength and specifications to ensure the reliability and accuracy of the test data; support the reciprocating friction of the raw material development process and return Tests to obtain test data under different fitness exercise orientation standards; in addition, it also supports dual tension and compression test methods, which can carry out diastolic pressure tests such as rubber stopper puncture and ampoule breaking force, and the test rate can be set at will.