A 22-year-old man was in a motorcycle accident with resultant neck injuries that

Question

A 22-year-old man was in a motorcycle accident with resultant neck injuries that led to partial paralysis of the upper and lower limbs. Almost immediately his chest felt heavy and he became dyspneic. His pulmonary function values were as Vital capacity (supine) 650 mL Minute ventilation (supine) 6 L/min Respiratory rate (supine) 30 b/min PaO2 61 mm Hg PaCO2 47 mm Hg 1. What are the values for the tidal volume (TV) and the alveolar ventilation (AV) for this individual? (Assume a normal value for dead space.) Compare with normal. 2. What is contributing to the decreased alveolar ventilation? 3. Which nerves and muscles are involved in this problem? 4. How is the residual volume affected? 5. Define dyspnea 6. What is causing the dyspnea in this individual? 7. Describe the reflexes involved in causing tachypnea in this individual

Explanation / Answer

Answer:

Tidal volume= Respiratory rate x weight

Alveolar ventilation= Tidal volume - dead space x Respiratory rate.

Decrease in pulmonary ventilation, blockage of the respiratory system and high altitude is the main factors which contribute for the decrease in alveolar ventilation.

Vagus nerves are involved in this problem.

Residual volume is affected by increased mechanical load generates afferent information from vagal receptors in the lungs.

Dyspnea or shortness of breath of lung disease.

Hypercapnia or hypoxemia is the causes of dyspnea in this individual.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.