1. Consult relevant regulations and standards: You can consult national and regional medical device regulations and relevant standards to determine whether there are requirements for service life, for example, you can refer to the regulations on registration and marketing license of medical devices formulated by various countries, or refer to technical specifications issued by industry organizations.
2. Reference to similar devices: If there is no clear service life requirement, you can refer to the service life of similar medical devices, for example, you can check the statistical data of the service life of similar devices in practical application, or consult professional institutions or manufacturers.