Abstract: Clinically, urinary catheters need to be in contact with body tissue for a long or short term. Each time the catheter is inserted or pulled out, the patient will have a burning sensation of varying degrees, which will easily cause corresponding mucosal damage and even tissue inflammation. This is mainly due to the large friction coefficient between the surface material of the urinary catheter and the body tissue. This article will introduce the use of Labthink blue light friction coefficient instrument for the surface friction coefficient of the catheter detection, further elaborated the importance of the surface friction coefficient of the catheter.

Keywords: catheter, medical catheter, friction coefficient, smoothness

Author: Labthink Technology Co., Ltd.

The medical catheter is a general term for connecting human body internal and external lumen products, and is widely applied in the clinical fields such as administration, perfusion, and drainage through intravenous catheters, intubation catheters, and catheters. Among them, urinary catheters are indispensable medical devices in clinical applications. The emergence of these catheters has led to the discovery of ideal alternatives to some of the more dangerous and complicated traditional methods of medical treatment. This has led to improvements in the medical level and the constitution of patients. Rehabilitation of physiological function. The catheter is a tube made of natural rubber, silicone rubber or polyvinyl chloride ( PVC ). It can be inserted into the bladder through the urethra to drain the urine. After the catheter is inserted into the bladder, there is a balloon near the catheter tip. The fixed catheter stays in the bladder and it is not easy to escape, and the drainage tube connects the urine bag to collect urine.

Clinically, urinary catheters need to be in contact with the body tissue either in a long or short term. Each time the catheter is inserted or pulled out, the patient will have a burning sensation of varying degrees, which can easily cause corresponding mucosal damage and even tissue inflammation. This is mainly due to the larger friction coefficient of the urinary catheter. The friction coefficient is mainly used to guide the friction coefficient generated between the surface material of the urinary catheter and the patient's base tissue. At present, there is no clear standard in the industry how to measure its indicators. Labthink Labsink Labsink , with years of testing experience and strong technical strength, specializes in the detection of the surface friction coefficient of medical catheters by special modification of its own MXD-02 friction coefficient meter. The following describes the test method in detail.

Catheter surface friction coefficient test

Test Location: Languang Packaging Safety Testing Center

Test Instruments: MXD-02 Friction Tester

Test preparation:

Take 36 latex, PVC , PUR catheters each . Latex catheter, for example, a component 12 every 3 groups, the first test group, the second group PVP lubricated, the third group coated with paraffin oil, the water soaked into groups of 6 30s The other 6 were soaked in water for 24h . PVC and PUR catheters were prepared in the same way as the catheters.

Test Methods:

Take 2 samples in the test control group that were immersed in water for 30 s and fix them on the 2 V -type groove plate by 1 sample clamping device , and inject water into the 3 storage tank until the sample is completely immersed therein. Put 200g of 4 standard sliders lightly on the top of the 5 specimens, and drag the slider with 6 sensors to move the slider in the direction indicated by the arrow at a speed of 100mm/min to measure the dynamic friction coefficient. Finally, take 6 tests. The average friction coefficient value. The same method tests the friction coefficient of the other two material samples at different soaking times.

Test Results:

Equipment introduction:

The MXD-02 friction coefficient meter is a professional-grade intelligent friction coefficient meter independently developed by Labthink . The equipment meets GB , ASTM , ISO standards, and can be professionally applied to the measurement of plastic films and sheets, rubber, paper, cardboard, woven bags, fabric styles, communication cables, metal cables for optical cables, conveyor belts, wood, coatings, Brake pads, wipers, shoe materials, tires and other materials sliding static and dynamic friction coefficient. The MXD-02 instrument's integrated PVC operator panel , micro-printer , and LCD screen that can display test data, results, and curves allow users to perform computer-free experiments. The professional test software has an intuitive operation interface, real-time data display and composition functions, supports the export of the test results in the EXCEL format, and can perform scientific statistical analysis processing of single-piece or group test results, historical data comparison and group test curve overlay analysis. The powerful data analysis function can also help the user to perform quantitative discrete analysis of test results and determine the slip-stick state through the preset oscillation coefficient .

Labthink blue light, professional commitment to provide industry advice to the field of customer packaging, food, pharmaceutical, cosmetic, printing, adhesive, automotive, petrochemical, biotechnology, construction and new energy, product sales, service, risk control solutions, is willing to In this way, enterprises and institutions in the industry will increase their technological exchanges and cooperation.

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