Drugdu.com expert's response:

The R&D of in vitro diagnostic kits is a rigorous and standardized full-process system, with 5 core key stages that ultimately produce safe and effective products complying with regulatory requirements.

Stage 1: Project Initiation and Preparation

Clarify the target analyte to be tested, intended use and application scenarios, and complete research on market capacity, competing products and clinical demands.
Confirm technical feasibility through literature review, form the project team, and prepare the project initiation assessment document for review and approval.
Define core indicators such as product performance parameters and intended use, complete design input, and form the product summary materials required for registration.

Stage 2: Product Development

Raw material screening: Select no less than 3 qualified suppliers to ensure the quality of core raw materials (antigens, antibodies, primers, probes, etc.) is stable and traceable.
Process and system optimization: Determine key parameters such as reagent formulation ratio, reaction temperature and working duration, and form a practical GMP production process.
Comprehensive verification study: Complete analytical performance evaluation and stability study with 3 batches of GMP-produced kits, determine the cut-off value or reference interval through the ROC curve, and cover full-scenario stability tests including transportation, shelf life, opened storage and repeated freeze-thaw cycles.

Stage 3: Registration Testing

Submit 3 consecutive batches of kits produced in the GMP workshop to the officially designated institution for registration verification, and finally obtain the registration test report, which serves as the legal basis for subsequent clinical trials.

Stage 4: Clinical Trial

After completing ethical review and clinical trial filing, conduct trials at compliant clinical institutions, verify the clinical performance of the product through a large number of clinical samples, and finally form a complete clinical trial protocol and clinical trial report.

Stage 5: Registration and Review

Organize all R&D documents and submit them to the drug regulatory authority, pass the quality system assessment, complete the response to supplementary questions as required, and obtain the medical device registration certificate after the review is approved, so that the product is officially launched on the market.