ﺑﺎﺯﮔﺸﺖ ﺑﻪ ﺻﻔﺤﻪ ﻗﺒﻠﯽ
خرید پکیج
تعداد آیتم قابل مشاهده باقیمانده : 3 مورد
نسخه الکترونیک
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Mechanisms of ventilatory control

Mechanisms of ventilatory control
Hyperventilation
  • Increased input from neural receptors
  • Pulmonary fibrosis, asthma, pulmonary edema, pulmonary embolism
  • Increased central drive
  • Increased peripheral drive at carotid body chemoreceptors
  • Hypoxia
  • Metabolic acidosis
Hypoventilation
  • Decreased central drive
  • Hereditary variation (15% with diminished response to pCO2)
  • Congenital central hypoventilation syndrome
  • Medications (eg, opioids)
  • Decreased peripheral drive
  • Carotid body resection
  • Metabolic alkalosis
Decreased hypoxic ventilatory response
  • Hereditary (Tibetans disease)
Feedback
  • Increased ventilation lowers pCO2 which reduces central and peripheral drive increasing pCO2
  • Decreased ventilation raises pCO2 which increases central and peripheral drive lowering pCO2
  • Hypoxia increases ventilatory drive which by lowering pCO2, increases pO2
pCO2: arterial carbon dioxide tension; pO2: arterial oxygen tension.
Graphic 131959 Version 2.0

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