The exercise challenge test is used to diagnose which of the following?

Which of the following best describes the role of rapid sequence intubation (RSI) in the prehospital management of patients with traumatic brain injury?

A) It is beneficial and should be used for all patients with traumatic brain injury who are experiencing trismus or who have an intact gag reflex. B) It is supported by anecdotal evidence, but no studies have been done to determine its feasibility or usefulness. C) It is controversial because of conflicting study results. D) It is detrimental, resulting in poorer neurological outcomes than in patients who received standard airway management.

________ is used to determine the age, growth rate, and position of the fetus, as well as obvious birth defects. It is generally performed at 16 to 20 weeks and is generally painless.

A. Ultrasound B. Cardiogram C. X-ray D. Amniocentesis