Haven't tried any type of clamp. Sounds painful. I probably would use some kind of diapers and plastic pants combo. So far it works well for my bedwetting.
I have used them and other clamp devices as well. Can make you sore so you move it to a diferent spot during the day and learn the amount of squeeze you need to set it to.
While I have not tried a clamp, I would suggest the doctor try it first and let me know how it works out.
(I should not assume a male doctor, but this suggestion would not work for a female doctor)
Forget the torture clamp.Go with inview clear condom catheters.Get the larger leg bag.You feel comfortable,able to wear your drawers and can discreetly empty the bag .It gives me a little freedom.Get a sizing guide before you buy any.Good Luck