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The 4AT – an instrument for delirium detection for older patients in the post‐anaesthesia care unit

Abdallah et al. [6] also reported that the PECS 1 block reduced postoperative morphine consumption compared with a control group. Thus, the PECS 2 block may be more effective than the serratus plane block, because it acts on a wider area. Finally, there are few reports on preventing or reducing chronic post-mastectomy pain using thoracic interfascial blocks. Versyck et al. [7] reported that the PECS 2 block does not reduce chronic postoperative pain. Although this contrasts with our results we believe our research was robust [2]. However, our study was a single-centre trial, which may affect the generalisability of our findings and more research is necessary.