AST Surgical Technologist Exam Practice 2025 – Complete Study Resource

The most common position utilized for a mitral valve replacement is the supine position. This position allows for optimal access to the chest cavity, which is essential during open-heart surgeries. In the supine position, the patient is lying flat on their back, providing surgeons with a clear and direct view of the heart.

Surgical teams prefer this position because it facilitates the use of standard surgical approaches for the heart, including median sternotomy, which involves cutting through the sternum to access the thoracic cavity. The supine position also aids in ensuring proper anesthesia management and facilitates the monitoring of vital signs throughout the procedure.

Other positions, such as Trendelenburg, which involves tilting the patient’s body so the legs are higher than the head, are not standard for this type of surgery, as they can complicate access and may not provide the most effective workspace for the surgical team. Prone and Fowler's positions are also not suitable for mitral valve replacement because they do not offer the necessary access to the thoracic cavity needed for such a procedure.