Electrosurgery pen

That's a good point. Capacitive coupling in the cable.

Big Clive

You could rebrand it as a DIY circumcision kit and sell it to (communities who routinely do that)

Raven Luni

There is another reason for having all the cable conductors at roughly the same potential: drive current. When you're up at MHz, it matters. Even current to the operator's hand has to be considered.

Mike Page

There are options for the tips! https://www.ebay.com/itm/254751274182?hash=item3b505bf4c6:g:7k0AAOSwemRfiqL4

We are glad you could dig into it!

Michael Thompson

Earlier this year I had a fair,y aggressive skin cancer removed and the surgeon kept deploying this tool on me. I was fascinated

Rik Kershaw-Moore

I would be good to get hold of a "power supply" unit. even if it's a broken one just to see how it works.

Dr Andy Hill

Using the tip as switch common simplifies clearances. The dome contacts can be detected via isolating pulse transformers. Fluke use a similar thing on their "split jacks". The tips might be autoclavable; or as you say just select what you want. The collar colour would indicate tip type. Why not have two Patient return pads (or two contacts on one adhesive panel) and regularly test impedance between them to prove good contact?

Mike Page

My employer re-designed a smaller thing for "epilation" (it zaps the follicles), which ran at about 4MHz and some tens of volts from memory. Du-Lac I think. The job was to replace an earlier unit designed by a local valve nut who used a ruddy great air core as part of the oscillator. Trading Standards pounced on that; ours was solid state. Chicken breast was recommended for testing. We made do with used teabags.

Mike Page

The downside being that it replaces a cut with a burn.

Big Clive

Better than Band-Aids to stop a bleeding. 😁 On the other hand, imagine the fun meat carving in the kitchen.. 😁

The question is, would you WANT to make a flesh cutting device?

Big Clive

What kind of circuitry does a machine like that have, i wonder. Could it be diy'd for cheap(er)?

Is this good for eye surgery?

Sounds very plausible to me. Just like when the dentist changes drill bits during the treatment and only clean/disinfect the equipment between patients (I hope)

Zeedijk Mike

Tips can probably be changed while working on one patient, and then the entire pen and connector is disposed of.

Mike & Marilyn Warren

Neurosurgeons scream for more At paranoia's poison door

Aaron Nadler

Or make one.

Bas

Very interesting video. I wish you'd been sent the power supply so you could demonstrate it on a pork chop or something :)

Charles

I checked that. The close pins fit the cheap meters and the wider pin spacing may fit the higher profile ones, but the third pin blocks it from going in.

Big Clive

Almost looks like the lead could be repurposed. Might connect to 3 of the 4 jacks on some multimeters.

Scott Miller

Yep. Have had one of these used on me. It was ok. And it was pretty stinky.

Nani Isobel