Final answer:
The recommended initial airway management technique for an unresponsive and unconscious patient in respiratory arrest is the Jaw thrust maneuver.
Step-by-step explanation:
The recommended initial airway management technique for an unresponsive and unconscious patient in respiratory arrest is the Jaw thrust maneuver.
The Head tilt-chin lift maneuver is not recommended in this case because it may cause further injury or obstruction if there is any suspicion of cervical spine injury.
Oral and nasopharyngeal airway insertions are not appropriate as the first step since the patient is unresponsive and may have an intact gag reflex, which could lead to airway obstruction.