There is a US patent for a micro needle device administered through the nose

Microneedle nasal delivery device

Abstract

The invention is directed to a nasal delivery device comprising one or more microneedles, and to methods of nasally administering a composition with a nasal delivery device comprising one or more microneedles

https://patents.google.com/patent/US20130085472A1/en

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“ Microneedle-mediated nose-to-brain drug delivery for improved Alzheimer’s disease treatment.”

https://matilda.science/work/91e59c97-582f-4e90-bca2-642643723dd6?l=fr

h/t A Deplorable Neanderthal