Which approach describes a procedure performed via a natural or artificial opening endoscopic?

The cystoscopic approach is defined as a procedure that is performed through a natural or artificial opening using an endoscope specifically designed for the bladder and urethra. This method allows for direct visualization of the internal structures and is minimally invasive, making it particularly suitable for various diagnostic and therapeutic procedures within the urinary tract.

The other approaches mentioned do not fit this definition. A surgical approach typically refers to traditional invasive surgery involving larger incisions, rather than utilizing natural openings. The transperitoneal approach involves accessing the abdominal cavity through the peritoneum, which does not align with the endoscopic concept. Lastly, the open approach signifies a fully invasive method where the relevant area is directly accessed with significant incisions, again contrasting with the endoscopic technique that seeks to minimize physical trauma through natural openings.