Tube placement apparatus
A tracheostomy instrument ( 1 ) used for inserting a tracheostomy tube has a needle ( 10 ) with colored bands ( 13 ) along its length and connected with a syringe ( 14 ) at its machine end. The syringe ( 14 ) is used to detect when the trachea ( 3 ) has been penetrated; the depth of penetration is indicated by observing which colored band ( 13 ) aligns with the skin surface ( 5 ). The machine end of the tracheostomy tube shaft ( 20 ) has a number of colored bands ( 26 ) corresponding to the bands ( 13 ) on the needle ( 10 ). A flange ( 24 ) is movable along the tube ( 2 ) and is locked in position against the colored band ( 26 ) corresponding to the band ( 13 ) on the needle ( 10 ) aligned with the skin surface ( 5 ).
1. A method of placing a tube in a body cavity comprising the steps of:
penetrating body tissue with an instrument, detecting when the instrument has penetrated the body cavity, observing markings along the instrument to determine which marking is aligned with a skin surface, displacing a flange along a tube until the flange is aligned with a marking on the tube corresponding to the marking on the instrument, retaining the flange in position on the tube and subsequently inserting the tube along a passage established by the instrument until the flange on the tube comes into contact with the skin surface.
2. Method according to claim 1 , wherein the markings along the instrument comprise bands of different colors, and wherein observing markings along the instrument comprises observing the bands of different colors to determine which band of color is aligned with the skin surface when the instrument has penetrated the body.
3. Method of claim 2 , wherein the markings along the tube comprises bands of different colors that correspond to the bands of colors along the instrument, and wherein the flange is displaced along the tube to align with the color band that corresponds to the band of color along the instrument determined to be aligned with the skin surface.