How does a nonrebreathing mask work? A one-way valve located between the reservoir bag and the base of the mask allows gas from the reservoir bag to enter the mask on inhalation but prevents gas in the mask from flowing back into the reservoir bag during exhalation. It has a reservoir bag that must remain inflated during both inspiration and expiration. The nurse adjusts the oxygen flow to ensure that the bag does not collapse during inhalation. The mask is constructed in a way that allows a constant flow of room air blended with a fixed flow of oxygen. Excess gas leaves the mask through the two exhalation ports, carrying with it the exhaled carbon dioxide.

If a patient is receiving an FIO2 of 0.60 on a day when the barometric pressure is 725 mm Hg, and if the Paco2 is 50 mm Hg, what is the patients alveolar oxygen tension (PAo2)? A. 177 mm Hg B. 233 mm Hg C. 344 mm Hg D. 415 mm Hg

Gas exchange occurs at the _______. a. two bronchi b. pleural sacs c. alveoli d. both b and c

If an individual fully inhales to a total lung capacity of 4.5 L at sea level (760 mm Hg) and dives to a depth of 66 feet, the lungs will be compressed to about A. 1.0 L B. 1.5 L C. 2.0 L D. 2.5 L

Which of the following forced expiratory measurements reflects the status of medium-sized to small-sized airways? A. FEF200-1200 B. PEFR C. MVV D. FEF25%-75%

Suppression of the peripheral chemoreceptors begins when the Po2 falls below A. 50 mm Hg B. 40 mm Hg C. 30 mm Hg D. 20 mm Hg

Most of the lung function indices reach their maximum levels betwee A. 5-10 years of age B. 10-15 years of age C. 15-20 years of age D. 20-25 years of age

what is the vital capacity of the person whose lung volume is shown? what is the residual volume of the patient, and why is it important?

To initiate inhalation, the diaphragm contracts, making the pressure inside the lungs __________. the same as the pressure outside the body zero lower than the pressure outside the body higher than the pressure outside the body None of the above

You place an NPA and start assisting ventilation with a BVM. While waiting for more advanced resources, you notice the patient's pupils are very small (pinpoint) and there is a syringe with a needle attached to it lying near the patient. Your treatment for this patient should include? Administration of charcoal orally Intravenous administration of naloxone Intranasal administration of naloxone Radio to the advanced providers enroute to bring charcoal when they come