Final answer:
The statement is generally false as RNs must document skin condition both before and after tourniquet use for patient care and legal documentation.
Step-by-step explanation:
The statement 'True or False: The RN must document skin condition under the tourniquet only after use,' is, in general, false. Registered nurses (RNs) are responsible for assessing and documenting the skin condition before and after the use of a tourniquet. It is important to assess the skin prior to application to note any existing conditions or potential risk factors for damage, and after removal to identify any immediate changes or complications resulting from the tourniquet application. Proper documentation of skin condition is crucial for patient care and to monitor for possible issues such as bruising, skin breakdown, or circulation issues. Moreover, documentation serves as a legal record of the care provided.