Rapid Sequence Induction

In rapid sequence induction, which is the most common site of aspiration of gastric contents when cricoid pressure is inadequately applied?

Regarding rapid sequence induction (RSI) in a 32-year-old female with a full stomach presenting for emergency cesarean section, all of the following are correct EXCEPT:

A 48-year-old male with gastroesophageal reflux disease and obesity (BMI 34 kg/m²) is scheduled for emergency laparoscopic cholecystectomy. Regarding RSI modifications in this patient, all of the following statements are true EXCEPT:

A 32-year-old male with acute appendicitis is brought to the OR for emergency appendectomy. He ate a full meal 2 hours ago. On induction, you plan rapid sequence intubation. After pre-oxygenation and loss of consciousness with propofol and succinylcholine, you notice the patient is difficult to ventilate manually—high airway pressure, reduced breath sounds bilaterally, and oxygen saturation begins to drop. What is the most appropriate immediate next step?

A 32-year-old woman with a full stomach (ate 2 hours ago) presents for emergency cesarean section under general anesthesia. Which feature best distinguishes the use of cricoid pressure (Sellick maneuver) from positive pressure ventilation in preventing aspiration during rapid sequence induction?