Vascular flowmeter system

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1. YY0285.1-2017 Catheter Power Injection Flow and Pressure Tester for Intravascular Catheter Power YY0285.1-2017 Catheter Power Injection Flow and Pressure Tester (Intravascular Catheter Power Injection Flow and Pressure Tester) YY0285.1-2017 Catheter Power Injection Flow and Pressure Tester is a specialized equipment used to test and evaluate the flow and pressure performance of intravascular catheters during power injection. The following is a detailed analysis of the tester:

1. Compliant with the standard. The tester meets the requirements of Appendix G of YY 0285.1-2017, ensuring the accuracy and reliability of the test results.

2. Testing principle: The testing instrument connects the catheter to an actual or simulated connecting pipeline through the catheter socket or its adjacent end, and then connects it to a constant pressure device filled with injection or simulated injection.

. This device can set the pressure limit of the injector, and the system flow is measured through a mass balance or other suitable methods. The peak pressure at the inlet of the conduit is recorded by an online pressure sensor.

III. Testing Instruments The testing instrument mainly consists of the following parts: constant pressure device: providing simulated injection solution, and maintaining the pressure within ± 5% of the clinical use pressure during the measurement process, and controlling the temperature within ± 2 ℃ of the required temperature.

. Injection or simulated injection: such as a mixture of glycerol and water, with a dynamic viscosity (kinematic viscosity/fluid density) within ± 5% of the required range. Actual or simulated connecting tubes: The inner diameter and length should meet clinical usage requirements. Online pressure sensor and data logger: Connect the analog connecting pipe end and the conduit seat to record pressure data. System flow measurement device: such as mass balance and meter or flow meter, with an accuracy of ± 2%.

4. Test steps: Prepare fluid and temperature: Inject fluid into the pressure device container and bring the liquid to the desired temperature.

. Connecting pipeline: Connect the connecting pipe to the pressure device and connect the pressure sensor to the end of the analog connecting pipe. Prepare the catheter: Follow the instructions in the user manual to prepare the catheter with caution and connect the catheter socket to the online pressure sensor. Limit the end of the catheter: for safe collection of injection solution. Exhaust air: Exhaust all air from the system. Adjust pressure: Adjust the pressure generating device to the required pressure for the test. Start testing: Let the fluid pass through the system and give the bridge enough time for the pressure and flow to reach a steady state. Record data: During injection, record the steady-state pressure at the catheter inlet and the achieved flow rate.

Fifth, the content of the testing report should include the following: a description of the injection and its dynamic viscosity (mPa · s) and density (kg/m ³).

. Test liquid temperature (℃). The pressure of the pressure source (Pa). Length and inner diameter of the connecting pipe (mm). The steady-state flow rate achieved in the system (mL/s). Pressure at the inlet of the conduit (Pa). 6、 Technical parameter testing pressure: adjustable from 2MPa to 8MPa, with an error not exceeding ± 2%. Test flow rate: 0-500ml, with an error not exceeding ± 2%. Water t

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