Every year more than 3.4 million people die worldwide [1]. Gastrointestinal cancer is one of the most frequent causes of cancer deaths in Europe. Non-standard extended and combined interventions performed on several organs using the latest technologies and performing cytoreduction have become everyday surgical practices [2].Besides, severe postoperative pain also contributes to the complications associated with immobility, such as, for example, deep vein thrombosis, and this further leads to a delay in discharge of a patient from the hospital [3].The effect of a single dose of morphine in the epidural space lasts for about a day, often with minor
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