I know butt in air would be great but I can't knell or even reach "there" if I did! I am too obese and quite arthritic. I seem to have no problem retaining the enema for the night - tiny bit may leak out on way to bed but it is only a few steps. Only real problem is being sure the air if out of the container when using it in that position.
I don't plan on reusing the enemas - I only have to pay a co-pay of $3 a month so not worth it.
They just said any infection could go directly to knee so I would be tested to be sure - urine, blood, etc. - nothing unusual I guess. I had to postpone last year when I started bleeding as surgeon wanted to be sure of what I had, etc.
ElaineNY