Final answer:
The example of an appropriately written nursing diagnosis is 'Potential for injury related to improper teaching in the use of crutches'.
Step-by-step explanation:
The example of an appropriately written nursing diagnosis is: Potential for injury related to improper teaching in the use of crutches. This statement follows the format of a nursing diagnosis, which includes the problem (potential for injury) and the cause (improper teaching in the use of crutches).