| 600 / | HD | SURGERY |
| 300 | DF | DIAGNOSTIC TESTING {38} |
| 407 | DF | .~ Detecting nuclear, electromagnetic, or ultrasonic radiation {11} |
| 437 | DF | .~.~ Ultrasonic {10} |
| 459 | DF | .~.~.~ Structure of transducer or probe assembly {3} |
| 462 | DF | .~.~.~.~ Probe placed in vascular system or body orifice {4} |
| 466 | | .~.~.~.~.~ Catheter {2} |
| 467 | DF | .~.~.~.~.~.~> Intravascular {2} |
| 471 | DF | .~.~.~.~.~.~> Tool (e.g., ablation, abrasion, cutting) |