Device (100) for protection and non-traumatic support of a surgical cavity (101), characterized in that comprising: - a radial wall (150), composed of a set of elements (121), (122), (123), etc., aligned along the longitudinal axis and connected each other, or by a single element wrapping up the same longitudinal axis as a spiral or a double spiral, and having a previously defined shape so that it can be adapted to a surgical working space created inside the body of a patient； the same radial wall (150) including an inner air chamber, and means able to push air (125) from outside and keeping the same air inside, so that the stiffness of the same radial wall (150) can be increased, and a previously defined pressure can be achieved, pushing tissues and inner anatomical parts of the same patient, and so that a protected surgical space (101) can be achieved in order to insert surgical instruments.
