How often should a plateau pressure be measured in ARDS patients?

A pediatric patient enters the ER with a small, plastic object stuck in her esophagus. PA and lateral chest radiographs fail to demonstrate the foreign body. Which of the following procedures would be most effective in demonstrating the location of the object?

A patient enters the ER with blunt trauma to the sternum. The patient is in great pain and cannot lie prone on the table or stand erect. Which of the following routines would be best for the sternum exam in this situation?

Which of the following reagents will convert 1 mole of 3-methylpent-1-yne into 3-methylpentane?

Which of the following statements concerning benzene is correct? I.   Benzene adds Br2 to retain the cyclic conjugation II.  All the carbon atoms are sp2 hybridized III. The heat of hydrogenation is more negative than we might expect for a conjugated cyclic  triene

The dipole moment of the C-Cl bond is 1.67 and the dipole moment of the C-F bond is 1.65. This is best explained by:  

A radiograph of an AP axial projection of the clavicle demonstrates that the clavicle is within the mid-aspect of the lung apices. What should the technologist do to correct this error?

Patient enters the ER having sustained trauma to the pelvis. The patient’s main complaint is about her left hip. Which of the following projections should be taken first to rule out fracture or dislocation?

During fluoroscopy, the radiologist detects a possible polyp in the ascending colon. He asks the technologist to produce a radiograph that will best demonstrate this region of the large intestine. Which one of the following positions will accomplish this goal?

A radiograph taken during an upper GI series demonstrates poor visibility of the gastric mucosa. The following factors were used: 80 kV, 30 mAs, 1/40-second exposure time, high-speed image receptors. Barium sulfate was used during the procedure. Which of the following factors needs to be modified during the repeat exposure?