Final answer:
The anesthetic management for a 6-week-old infant with subglottic stenosis undergoing a dilation via tracheostomy does not include suctioning of the airway, placement of a small-diameter tube beyond the obstruction, shortened expiratory times, or inhalational induction.
Step-by-step explanation:
When an infant with subglottic stenosis requires a dilation via tracheostomy, the anesthetic management is least likely to include certain procedures. These include suctioning of the airway and assisted ventilation, placement of a small-diameter tube beyond the obstruction, shortened expiratory times, and inhalational induction. These procedures are not typically performed during a tracheostomy dilation.