Arterial access from lower extremity. The common femoral artery is the only access site used in the lower extremity. Catheters used for performing coronary angiography via the femoral artery were developed by Melvin Judkins, MD; thus, the method often is referred to as the Judkins technique. This widely used method requires separate preformed catheters for the right and left coronary arteries (see the images below).
Urethral sounds/play, sometimes called sounding, is basically inserting objects (often steel sounds and catheters) into the urethra for erotic purposes. Sounds painful and unpleasant to most, but some people get a kick out of this.
It does sound like you could be leaking amniotic fluid. It doesn't smell like urine. It would be like a pale straw color and be nearly odorless. I hope you went and had a labor check even if it turns out to have been your plug and the fluid build-up behind the plug leaking and not amniotic fluid. Good luck.