Final answer:
A nurse must check the client's circulation every 10 to 15 minutes when they are in full leather restraints to maintain safety and proper care.
Step-by-step explanation:
When a nurse places a client in full leather restraints, it is critical to check the client's circulation frequently to ensure their safety and maintain appropriate care. According to standard patient care protocols, the nurse must check the client's circulation every 10 to 15 minutes. This monitoring includes assessing skin color and temperature, checking for any signs of impaired circulation such as numbness or tingling, and ensuring that the restraints are not excessively tight. Proper documentation of these checks is also a crucial part of patient care.