Ideas for Medical Themed "Alone Time"

I don't currently have a partner that I can enjoy medical play with so until I find someone to join me in my medical fantasies, I'm stuck with self love, my imagination, and porn. I'm looking for some ways to tie a medical "prop" into my masturbation to spice things up. I'm a student who has roomates, so large or expensive medical toys aren't feasible. However, basic clinical tools like stethoscopes or sphygmomanometers are something a student like myself could feasibly possess. I also have to be able to get it without being a physician or having some kind of medical license. Anyone have any ideas or suggestions?

I think it's fairly easy to buy basic medical equipment from suppliers in line and you can certainly buy specula, thermometers, sounds, stethoscopes, wartenberg wheels etc on sex toy/fetish websites (I've bought specula myself that way). Have fun!

I enjoy catheters of ALL kinds.

I find one enjoyable varriation is to insert a large diameter (F30) Foley retention catheter (with urinary bag) up my penis, and masterbate with a WAHL "Powersurge" vibrator wrapped around my engorged penis, while simultaniously filling my stomach with very cold wine via a feeding tube catheter run up my nose, down my throat, and into my stomach, while simultaniously taking a large volume (6+ quart) hot soapsuds rentenetion enema, using a double baloon retention catheter held firmly in place in my rectum. YES indeed, that can be a "MAX-CATH" experience!

I often incorporate speculums into my masturbation routine, it's very satisfying

You could pick up a few basic medical tools (stethoscope, blood pressure cuff, thermometer, even otoscope) at a Walgreens or Rite Aid. I've done exactly that and have used them on play patients and even myself.