Animals in Biomedical Device Testing: Welfare and Alternatives

Medical devices including implants, stents, and surgical instruments are tested in animals before human use, raising welfare concerns and driving demand for alternatives.

Key Facts

Regulatory frameworks in the US, EU, and elsewhere require animal testing for most implantable medical devices
Commonly used species include pigs, sheep, rabbits, and dogs, chosen for anatomical similarity to humans
Orthopaedic, cardiovascular, and neurological devices account for the largest volume of device animal testing
Pigs and sheep used in cardiovascular device testing often undergo open surgical procedures
In vitro tissue models, computational simulations, and cadaveric testing are reducing but not yet replacing animal use
Post-procedural pain management is mandatory in regulated facilities but variable in practice
The 3Rs framework (replace, reduce, refine) is applied in device testing but progress is slower than in drug testing

Welfare Considerations

Animals used in medical device testing undergo invasive surgical procedures that cause acute and sometimes chronic pain, and may experience post-operative complications including infection, implant failure, and mobility restriction. While pain management is required, the adequacy and duration of analgesic coverage varies between facilities. The welfare case for accelerating alternatives development is strong: sophisticated bench-top simulators, computational fluid dynamics modelling, and advanced in vitro tissue platforms are increasingly able to assess device performance without live animal implantation. Industry investment in alternatives is growing but remains insufficient relative to the scale of current animal use.

What You Can Do

Support funding for development and regulatory validation of non-animal device testing methods
Ask medical device companies about their 3Rs commitments and use of alternatives
Advocate for regulatory frameworks to actively incentivise alternatives adoption rather than simply permitting it
Support organisations working to develop validated alternatives to animal testing in the medical device sector