The seat of the chair uses a thick, solid cushion to ensure the patient does not sink into the chair too much. It also benefits the operator because the design decreases the operator's likelihood of feeling exhausted, even after spending a lot of time in a seated position. The triangle-shaped seat helps by reducing the load on the back of the thighs, decreasing the level of discomfort. The broad, curvy backrest is designed to hold the upper waist and support the back. It also allows the operator to keep a position that takes pressure off the waist. The pedal style elevating mechanism ensures raising and lowering the chair is a simple process. This also enables the operator to easily and securely lock the seat rotation. The OC-1A cushioned armrest has a small inward incline that allows a patient's arms to sit in a natural resting position.