In the Trendelenburg position the body is laid flat on the back (supine position) with the feet higher than the head by 15-30 degrees, in contrast to the reverse Trendelenburg position, where the body is tilted in the opposite direction. This is a standard position used in abdominal and gynecological surgery.

Physiologic Mechanisms Associated with
Trendelenburg Position for the Hypotensive Patient: Friend or Foe?
Trendelenburg position
Influence of steep Trendelenburg position and CO(2) pneumoperitoneum on cardiovascular, cerebrovascular, and respiratory homeostasis...
Cardiac function during steep Trendelenburg position and CO2 pneumoperitoneum for robotic-assisted prostatectomy: a trans-oesophagea...
The effect of pneumoperitoneum in the steep Trendelenburg position on cerebral oxygenation
Anaesthesia for robotic-assisted radical prostatectomy: considerations for laparoscopy in the Trendelenburg position
The Trendelenburg position: hemodynamic effects in hypotensive and normotensive patients.
editor's choice: Influence of steep Trendelenburg position and CO2 pneumoperitoneum on cardiovascular, cerebrovascular, and respira...
Hemodynamic perturbations during robot-assisted laparoscopic radical prostatectomy in 45° Trendelenburg position