The blame should be put squarely on the shoulders of tophatter.com. They know the quality of what is being sold and choose to look the other way for the sake of making commission and sales fees on these imitation goods. In my estimation and also the interpretation of the law this is outright FRAUD.
Inverse operations are opposite operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse operations.
If multiple procedures (as defined by distinct objectives) are performed, then multiple codes are assigned. The term anastomosis is not a root operation because it is a means of joining and is an integral part of another procedure such as a bypass or a resection. Therefore, it never stands alone. Incision is not a root term because it is a means of opening and is always an integral part of another procedure.