Authorization for Invasive Medical Procedures for a Child

In a custody decree, if both parents are required to consent to invasive medical procedures for their children, under Texas law what tests or treatments are considered invasive?

I don't see that Texas has a statute or case law that defines the term "invasive" for custody matters, which would normally mean that you would look to the dictionary definition. In broad terms, the meaning of "invasive" suggests that it would apply to any procedure that involved entry into the body by cutting or inserting an implement. I suggest consulting a local lawyer to determine how the courts in the county at issue interpret the term "invasive", and whether it would extend (for example) to routine vaccinations or similar procedures.