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.
Figuring out how to insert sounds into the urethra is something that should be left up to the trained professionals. Inserting anything into your urethra just isn't a good idea gentleman. Sounds were created to open up any blockages from the penis through the urethra. Without the usage of these sounds probing their ways to the urethra, the afflicted guy would find it painful if not completely impossible to urinate.