Ukrainian Medical Association of North America (https://umana.org/) are working with the Illinois chapter (https://www.facebook.com/UMANAIllinois) to build out a medical supply pipeline from Chicago O'hare to Ukraine via Lublin, Poland. 2 cargo flights of up to 100 tons have already gone over
They are now running a parallel operation here in Wisconsin through a donated warehouse outside Milwaukee (https://www.facebook.com/UMANA.Wisconsin)
There's a list of high need medications and supplies here, but basically anything you would need in a trauma suite and in trauma aftercare are the highest needs:
http://umanawisconsin.org/
The Milwaukee Rotary is helping to organize. People can sign up to volunteer for this drive and/or future ones here
http://milwaukeerotary.com/bigdreamslocally/ukraine-support/
You can also directly donate to UMANA (https://umana.org/UkraineDonation.php