<prompt> A 6 year old patient, who was admitted for a dog bite on the face, unexpectedly developed anaphylaxis to a test dose of Augmentin. He developed stridor which needs immediate intubation. You are the only available doctor at the time. You have a No.3 curved blade laryngoscope ready and you have asked for an Endotracheal Tube ET to the nurse. What should be the appropriate internal diameter of the tube?3.5mm4.5mm5.5mm6.5mm  <response>: Internal diameter of an ET tube in children age in years4 4.0 mm 64 4.0 mm 5.5 mm 3-3.5 is the internal diameter for a neonate For an adult male - 8.5 mm For an adult female - 7.5 mm Ref: Oxford Handbook of Clinical Specialities, Page 627 