Abstract: Multi layer endotracheal tube apparatus (800) comprising an outer flexible elongated tube layer (802) having a proximal end (816) and a distal end (818), defining an inner surface (820) therebetween, at least one flexible elongated inner tube layer (804) having a proximal end (822) and a distal end (824), defining an inner surface (828), the distal end (824) of the inner tube layer (804) defining a distal port section (830), the inner tube layer (804) extending along inner length of the outer tube layer (802), the distal end (824) of the inner tube layer (804) detachably coupled along a closed circumference of the inner surface (820) of the outer tube layer (802), and at least one closure mechanism (806) operative to close the distal port section (830), and detach the distal end (824) of the inner tube layer (804) from the inner surface (820) of the outer tube layer.