Pneumatic infusion devices may atomize, spray or propel liquid toward the skin. Marketing often calls them “needle-free” or “non-invasive,” but the absence of a needle does not prove that the skin barrier remains unchanged or determine regulatory status.
1. Surface spray versus barrier crossing
Low-pressure mist may mainly wet and distribute material on the surface. High pressure, short distance and a concentrated jet may interact very differently with the skin. Structure, pressure, particle size, speed and experimental evidence should explain the real effect.
2. Key technical parameters
- Operating pressure and range for every level.
- Nozzle diameter, geometry and distance from skin.
- Droplet size, jet speed or suitable alternative measures.
- Volume per shot, frequency and duration.
- Area, repetitions and operating angle.
- Pressure limitation, safety valve and abnormal-state protection.
3. Skin and substance
Verify whether the skin remains intact, whether micro-injury occurs, and where the liquid actually remains or travels. Identify whether the material is a cosmetic, disinfectant, medicine or another product. Drug delivery, anaesthesia or treatment cannot be assessed as ordinary cosmetic spraying.
4. High-risk claims
“Needle-free injection,” “reaches the dermis,” “replaces skin boosters,” “delivers drugs” or “treats inflammation” directly change the understood purpose. Filing and marketing must describe the same mechanism.
5. R&D decision
For general beauty care, create clear limits through pressure, nozzle, substance, distance and instructions, and verify them. If the core value is trans-barrier delivery, assess the medical or other regulatory route directly rather than merely changing the product name.
Pneumatic needle-free devices differ greatly and must be assessed using the actual sample and companion liquid.