Final answer:
The incorrect statement indicating a need for further teaching is that the adolescent must stay on strict bed rest for 3 days after cardiac catheterization, as this is not a typical requirement.
Step-by-step explanation:
The statement by the adolescent indicating a need for further teaching is, "I have to stay on strict bed rest for 3 days." After a cardiac catheterization, patients are generally advised to limit physical activity for a short period, but strict bed rest for three days is not typically required. Normal recommendations include avoiding heavy lifting and strenuous exercise for a few days, as well as keeping the insertion site dry and clean — hence showering instead of tub baths is advisable and the pressure dressing usually needs to remain in place for at least a day to prevent bleeding. Attending school without engaging in physical exercise for several days post-procedure is also a common recommendation.