The vibration created by percussion penetrates the lung to approximately what depth?

Which of these statements is false?

A) Increasing the target-image receptor distance reduces penumbra. B) Radiation intensity is directly proportional to the square of the distance from the source. C) A long PID increases image sharpness. D) A recessed tube increases the target-image receptor distance.

The low-pressure and low-tidal volume alarms are sounding on a mechanically ventilated patient. Measurement of the cuff pressure reveals 18 cm H2O. What action should be taken?

a. Replace the endotracheal tube with a larg-er size. b. Add enough air to the cuff to maintain the cuff pressure at 34 cm H2O. c. Increase the set pressure to increase the tidal volume and compensate for the leak. d. Add air until a slight leak is heard while auscultating the larynx, then measure pressure.