Steep Trendelenburg Positioning

The steep Trendelenburg patient positioning, while utilized in certain surgical procedures, poses several significant risks to patients. It can compromise hemodynamics and oxygenation, while also restricting access to the intraoperative airway. Postoperative respiratory distress may arise due to swelling in the upper chest, neck, and face as a consequence of the Trendelenburg position. Additionally, the potential for nerve injury is notably high. It is crucial to consider the length of the surgery and any pre-existing risk factors of the patient, as the positioning can lead to significant cardiorespiratory compromise, particularly in individuals with notable preoperative cardiopulmonary dysfunction. Furthermore, this position can elevate intraocular pressure and has been linked to ischemic optic neuropathy in some cases. It also increases intracranial pressure, affecting cerebral blood flow. Although cerebral blood flow is typically auto-regulated under normal conditions, its institution in the steep Trendelenburg position can initially increase cerebral perfusion pressure. However, this may decrease over the duration of a robotic procedure, especially as central venous pressure (CVP) rises due to the head-down positioning. This situation is exacerbated by hypercarbia, which leads to cerebral vasodilation and subsequent increases in intracranial pressures.