Evidence and sources
How we decide what to publish.
Where our information comes from
- Manufacturer catalogues, instructions for use and technical documents
- Regulatory databases (FDA, EU, national registers)
- Peer-reviewed clinical studies and systematic reviews
- Published price surveys and clinic price lists (for cost guides)
How to read our specifications
Figures are typical ranges. Not every diameter is available in every length. Where we could not confirm a detail, we say so rather than guess.
Read our full methodology.