General Discussion

hands (veins) heal? They obviously can't use his feet, given how swollen and probably want to preserve his median cubital vein (top of the arm at the elbow) for blood draws.

A PICC line (peripherally inserted central catheter) would have a visible tube, though hidden under long sleeves. But, given what appears to be advancing dementia, he might well catch the PICC line on something and pull it out).

So, that (primarily) leaves a port--tunneled under the skin at the chest, with the least infection risk, non-visible--requiring only monthly checks and flushes when not in regular use. It COULD be placed in the White House clinic, despite requiring some light sedation and local anesthetic-- and about 60 minutes of time to place. Or, of course another trip to Walter Reed if they feel it necessary for the placement. It can remain in place for years if necessary.

If, as I suspect he is getting regular fluids administered--delivering an experimental dementia medication (likely immune therapy), I doubt this regimen is going to stop any time soon, so a port might be advisable.

There are couple of other options, but I just don't see continuing the use the veins of his hands, given how readily they bruise, extravasate (blow up), and never seemingly get a chance to heal.