Fixable degassing trocar

A trocar, comprising:

• a drill shaft (7) having a first end portion and a second end portion, wherein the drill shaft (7) comprises a pointed end (8) at a tip of the first end portion of the drill shaft (7), an indent cavity (9) placed between the first end portion of the drill shaft (7) and the second end portion of the drill shaft (7) and a male thread adjacent to the indent cavity (9);
• an inner tube (1) having a first end and a second end, the inner tube (1) comprises a female thread (5) at the first end of the inner tube (1), an indent (3) placed adjacent to the female thread (5) and a front hole (4) located at the second end of the inner tube (1), wherein,
• the inner tube (1) is detachably coupled to the drill shaft (7) through the female thread of the inner tube (1) and the male thread (6) of the drill shaft (7), and the pointed end (8) of the drill shaft (7) for perforating a skin of an animal by extruding through the front hole (4) of the inner tube (1),
• the indent (3) placed adjacent to the female thread (5) of the inner tube (1) moves over the inner tube (1), and the indent cavity (9) of the drill shaft (7) allows a movement of the indent (3);
• and
• a flexible outer tube (10), wherein the flexible outer tube (10) having a first end and a second end, the flexible outer tube (10) is placed on the drill shaft (7) and the inner tube (1) combined, the flexible outer tube (10) comprises a plurality of slit flaps (11,12) placed on a surface of the flexible outer tube (10) adjacent to each other, a first slit flap (11) of the plurality of slit flaps placed on the first end of the flexible outer tube (10) is configured to inflates inside a stomach of the animal and a second slit flap (12) of the plurality of slit flaps placed on the second end of the flexible outer tube (10) is configured to inflates on the skin of the animal, when the drill shaft (7) is pulled out from the outer tube (10), and the indent (3) placed on the inner tube (1) remains seated in a position defined by the indent cavity (9) and configured to hold the flexible outer tube (10) in place relative to the inner tube (1) and retains the first slit flap (11) configured to retain inside the stomach and the second slit flap (12) configured to retain on a skin side of the animal.