a) an access port comprising a first tube ending in a proximal entry port and a distal endotracheal tube connector, the proximal entry port configured to receive at least medical instrument and the distal endotracheal tube connector configured to couple to a proximal end of the endotracheal tube;

b) a selectively pressurized balloon-valve seal positioned within an inner surface of the first tube distal to the proximal entry port, the balloon-valve seal comprising at least two balloons attached to at least a portion of the inner surface of the first tube, wherein the balloon-valve seal assumes a sealed configuration when the at least two balloons are inflated and the balloon-valve seal assumes an open configuration when the at least two balloons are deflated; and

c) a ventilation system connector comprising a second tube comprising a distal end operatively coupled to the first tube between the balloon-valve seal and the distal endotracheal tube connector and a proximal end ending in a ventilation system connector, the ventilation system connector configured to couple to a ventilation device.