The TLDR is: I believe swelling from the surgery is probably putting enough pressure on his urethra to cause his inability to void. When the swelling subsides, he'll start leaking again until they activate the AUS

The longer version is I have not had an AUS implanted. However I've had two different surgeries to address incontinence following a prostatectomy. Of note is that prior to all this I had a neurogenic bladder as the result of a spinal cord injury 16 years ago and have been completely dry but having to do clean intermittent catheterization 4-5 times a day. Prostatectomy left me severely and completely incontinent. The first was a Bone Attached Mesh Sling (BAMS) commonly referred to as sling surgery. This isn't a normal solution for severe incontinence but following urodynamics testing my urologist was advising the goal was to get me back to using intermittent catheterization through the least invasive surgery possible. Following the sling surgery and removal of the foley cath 2 days later I was stunned and thrilled to find my self--dry, using intermittent catheterization to empty my bladder for the first time in nine months. Nine months of changing Depends disposable underwear every 2 hours had been a nightmare. Unfortunately, after a few days I began to start leaking again and after 2 weeks was leaking quite a bit (except at night--thank you gravity). While I had achieved a marked improvement downgrading my incontinence to moderate from severe it turns out the first weeks remarkable continence was due to swelling from the surgery, once all the swelling went away the incontinence increased to moderate.

My second surgery was the implant of Uromedica ProAct dual balloon adjustable continence therapy devices. They are implanted at the neck of the urethra with only a nominal amount of fluid in the balloons to begin with. After 5 weeks I go back to the office and the doc starts adding fluid to the balloons to add pressure to the urethra. This process can go on for a few months as they titrate up the amount of fluid to achieve the desired results. Mine were implanted two weeks ago. Immediately following the surgery I was completely dry for about 5 days and then as swelling started to go down I started leaking again. Still better than just prior to the surgery but I won't be surprised if it gets back to the moderate level prior to balloons being adjusted for the first time. In my case, I'm hoping the balloon volume can be adjusted mimic what I was experiencing immediately post surgery.

Good luck to you and your husband! Your support is so important.