The Trendelenburg is a position in which a patient lies down with the head lower than the feet. This position is used in surgery and intensive care to improve blood circulation to the brain and abdominal organs.

For example, it is used for patients who are undergoing surgery in the pelvic or abdominal area, as it helps reduce the amount of bleeding during surgery.

The Trendelenburg position is achieved by placing a board under the bottom of the patient's bed so that the head is lower than the feet. The inclination is usually around 20-30 degrees. This position can help improve blood flow to the brain, as gravity helps increase pressure in the veins of the neck, which in turn helps increase venous return.

Additionally, in patients with heart failure, the Trendelenburg position may help improve blood flow to the heart and abdominal organs, which may be beneficial for organ oxygenation and cardiovascular function.

However, this position is not suitable for all patients, in some cases it can cause problems such as decreased blood flow to the heart, decreased pulmonary oxygenation, or even intraocular or ocular pressure. Therefore, it is necessary to evaluate each particular case and the needs of the patient before making the decision to use the Trendelenburg position.