<prompt> What is the instrument shown below?Urethral dilatorTracheal dilatorAneurysm needleUrethral dilator  <response>: Ans. b Tracheal dilator Used during tracheostomy Smooth and round tip Not sharp Tips bent at right angles to rest of the instrument No lock or clasp This is known as Trousseaus Tracheal dilator Helps to widen trachea while inserting tube 