Intractable Hiccups in the Emergency Department

What is the recent evidence suggesting a highly effective maneuver for relieving hiccups?

Which maneuver involves simultaneous phrenic and vagus nerve stimulation by inducing diaphragmatic contraction and epiglottic closure?

What is the reported self-reported efficacy of the FISS method for stopping hiccups?

Which maneuver is thought to break cyclic reflex arc activation in persistent hiccups but is usually ineffective according to the literature?

What is the success rate of stopping hiccups reported in the ED using a simple makeshift system consisting of a coffee straw and water cup?

Which intervention for intractable hiccups is thought to be ineffective according to the literature?