A peak flow meter requires a patient to: Obreathe into a mouthpiece and connecting tube while a nose clip prevents nasal breathing Owear a device on his fingertip to measure the amount of oxygen in the arterial blood Obreathe into a portable instrument to measure how fast air can be pushed out of the lungs Obreathe into a device that records the volume of inhaled and exhaled air
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A peak flow meter is a device used to measure the speed of air being exhaled from the lungs. Show more…
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T. L.
PART I - A spirometer is used to measure air flow and volume, as well as the oxygen and carbon dioxide content, into and out of the mouthpiece. The subjects are instructed to hold their breath after breathing in and out. Occasionally, the subject is asked to perform an inspiration or expiration (apnea) during the experiment. Towards the end of the experiment, the subject is instructed to rapidly breathe in and out (like a panting dog). Please answer the following questions using the data: Flow Shallow Rapid Respiration Inspiration Apnea Expiration Apnea Volume 1.) Describe the relationship between %O2 and %CO2 in the graph. What does this have to do with gas exchange in the alveoli, and how can we use these two graphs to determine when inspiration and expiration is occurring?
Sri K.
1. Describe the relationship between intrapulmonary pressure, atmospheric pressure, and air flow during normal inspiration and expiration, referring to Boyle's law. (1 point) 2. Resistance varies in Mike's conducting airways. Using your understanding of respiratory anatomy, explain where in his airway the resistance is highest and why. (1 point) 3. Several physical factors that influence the efficiency of pulmonary ventilation are compliance, alveolar surface tension, and airway resistance. Briefly describe each factor and identify the one that is affecting Mike's efficiency of breathing. (2 point) 4. What must happen to Mike's intrapulmonary pressure in order for him to maintain normal air flow during inhalation and exhalation when he is having one of his asthma attacks? (1 point) 5. How does Mike's body make the necessary changes in intrapulmonary pressure to maintain normal air flow when he is experiencing cold-induced asthma? (1 point) 6. When Mike is experiencing an asthmatic attack, his forced vital capacity (FVC) is 65%, and his FEV1 is 65%. Are these values normal? Knowing how one performs FVC tests, explain these test results in Mike's case. List all the lung volumes and lung capacities, and explain each one. (3 point) (Assume that Mike and the doctor have performed an accurate test.) 7. Albuterol is a selective beta-2 adrenergic agonist, which means it specifically activates beta-2 adrenergic receptors on smooth muscle in the airways. How does this improve Mike's asthma? (1 point)
Josee P.
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