Seatbelt attachment for surgical patient

A seatbelt attachment comprising:

• a chest section having a chest-section axis on which the chest section is elongated;
• a shoulder section having a shoulder-section axis on which the shoulder section is elongated;
• and
• a joint connecting the chest section and the shoulder section, the joint being flexible relative to the chest section and the shoulder section;
• the joint having a rotational axis that is transverse to the chest-section axis and the shoulder-section axis;
• the shoulder section including a back elongated along the shoulder-section axis, the back including an outer surface and an inner surface opposite the outer surface;
• the shoulder section including two legs elongated along the shoulder-section axis and aligned along the shoulder-section axis with the back, the legs each having a distal end and the legs extending from the back to the distal ends, respectively;
• the distal ends of the legs being spaced from each other defining a cavity along the inner surface of the back;
• and
• the coefficient of friction of the outer surface being less than the coefficient of friction of the inner surface.

A seatbelt assembly comprising:

• webbing including a shoulder belt elongated along an axis;
• and
• a seatbelt attachment releasably engageable with the shoulder belt;
• the seatbelt attachment including a chest section extending along the axis and a shoulder section extending along the axis;
• the seatbelt attachment including a joint connecting the chest section and the shoulder section, the joint being flexible relative to the chest section and the shoulder section;
• the shoulder section including a back elongated along the axis, the back including an outer surface and an inner surface opposite the outer surface;
• the shoulder section including two legs elongated along the axis and aligned along the axis with the back, the legs each having a distal end and the legs extending from the back to the distal ends, respectively;
• the distal ends of the legs being spaced from each other defining a cavity along the inner surface of the back;
• the shoulder belt abutting the outer surface of the back;
• and
• the coefficient of friction of the outer surface being less than the coefficient of friction of the inner surface.