MEDICAL DILATOR WITH ECHOGENETIC MARKER

Creating a dissected tissue space in a human subject by using ultrasonic guidance includes inserting a distal end of a. dilator assembly into a tissue space of a. subject, causing and regulating distal movement of the dilator assembly, and subsequent to cessation of the distal movement, deploying an inter-tissue or inter- organ spacer in the tissue space so as to separate a. first tissue from a second tissue, or a. first organ from a second organ. In one example, the dissected tissue space is between a prostate and a rectal wall of a human subject. A medical dilator kit for an ultrasound-guided tissue dissection includes a beveled-tip medical dilator and a dilator-sheath having an internal diameter greater than or equal to an external diameter of the dilator.