I did form a stricture after surgery but it took a bit longer than 4 weeks. I did have an issue with surgical clips migrating into the urethra and bladder,but that is "supposedly" a 1 in 500 chance if happening. The above caused a flow to very slow flow. The surgeon may be reluctant to put a camera into the bladder so soon after surgery.
I did go into full retention after a minor procedure to stretch the scar tissue and had to have a catheter fitted, but following removal I was able to urinate.
He may need some medication to help the problem.
Thanks Chris