My Dad had his gall bladder removed a couple of years ago. He was nearly 80 when he had it done and it was done using keyhole surgery. He too, was terrified at the thought, but he was fine afterwards.
So good luck to your other half - they will be fine!
↲↲↲↲seemingly hers are to big to zapI thought they used lazers to zap the stones?
Tell her not to worry she will be sound, I have got to have an op on my prostate gland, they get to it by inserting a camera and a tiny pair of snippers up my willy to snip away a bit of tissue to ease the pressure.