A frequently recommended treatment for hiccups is to hold one’s breathe. The resulting condition, hypoventilation, causes buildup of carbon dioxide in the lungs. Predict the effect on the pH of blood.

A frequently recommended treatment for hiccups is to hold one’s breathe. The resulting condition, hypoventilation, causes buildup of carbon dioxide in the lungs. Predict the effect on the pH of blood.

Basic Clinical Lab Competencies for Respiratory Care: An Integrated Approach

5th Edition

ISBN:9781285244662

Author:White

Publisher:White

Chapter15: Humidity And Aerosol Therapy

Section: Chapter Questions

Problem 10SEPT

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(a) The partial pressure of CO2 in the lungs can be varied rapidly by the rate and depth of breathing. For example, a common remedy to alleviate hiccups is to increase the concentration of CO2 in the lungs. This can be achieved by holding one’s breath, by very slow and shallow breathing (hypoventilation), or by breathing in and out of a paper bag.Under such conditions, pCO2 in the air space of the lungs rises above normal. Qualitatively explain the effect of these procedures on the blood pH.(b) A common practice of competitive short-distance runners is to breathe rapidly and deeply (hyperventilate) for about half a minute to remove CO2from their lungs just before the race begins. Blood pH may rise to 7.60. Explain why the blood pH increases.(c) During a short-distance run, the muscles produce a large amount of lactic acid (CH2CH(OH)COOH; K2 = 1.38 × 10 –4 M) from their glucose stores. Why might hyperventilation before a dash be useful?
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You have seen how breathing patterns can affect blood CO2 and blood pH to cause respiratory acidosis or respiratory alkalosis. Factors other than breating patterns can cause changes in blood pH. When blood pH gets out of line due to a non-respiratory problem it is referred to metabolic acidosis or metabolic alkalosis. In this case the respiratory system is called upon to try to fix the problem by adjusting breathing patterns accordingly. Use this information as you consider the next two questions. A patient comes to the emergency room having overdosed on aspirin (acetlysalicylic acid) and is in metabolic acidosis. The patient is breathing a a rate and depth of breathing that differs from normal. Predict the breathing pattern you likely would see in this patient as her respiratory system tries to help with the problem. Explain your reasoning.