TNF and delirium: Similar findings were found in the study of Ding et al[26] that TEAS at Shenting, Baihui, bilateral Neiguan, and Hegu points, could reduce the occurrence of postoperative delirium in elderly patients, the main mechanism may be related to the inhibition of inflammation and the alleviation of brain injury by reducing the plasma concentrations of neuron-specific enolization (NSE), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β).