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Old 07-11-2011
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Default Respiratory alkalosis

A patient on intensive care is ventilated with a frequency of 12 per minute and a tidal volume of 0.6 L. His arterial pH increases to >7.5. What is the most reasonable action to correct this respiratory alkalosis?

(A) decrease dead space
(B) decrease tidal volume
(C) increase minute ventilation
(D) increase oxygen fraction
(E) use positive end-expiratory pressure (PEEP)
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Old 07-11-2011
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B) Decrease tidal volume.

He has resp alkalosis so you would compensate by increasing PCO2. All the options point towards increasing PO2 except for B) Decrease tidal Volume. However, Im not sure what the last option is! Can someone explain Positive end expiratory pressure?

Is B the right answer ?
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Old 07-12-2011
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B
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Old 07-12-2011
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c increase ventilation rate to blow of the co2
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Old 07-12-2011
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Quote:
Originally Posted by jahn77 View Post
A patient on intensive care is ventilated with a frequency of 12 per minute and a tidal volume of 0.6 L. His arterial pH increases to >7.5. What is the most reasonable action to correct this respiratory alkalosis?

(A) decrease dead space
(B) decrease tidal volume
(C) increase minute ventilation
(D) increase oxygen fraction
(E) use positive end-expiratory pressure (PEEP)
THE ANS IS decrease tidal vol cos thts the only option tht will increase PCO2 n positive end expiratory pressure is generating positive pressure in lungs to avoid airway collapse this is going to help u generating better ventilation thus increasing PO 2
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Old 07-12-2011
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Quote:
Originally Posted by jahn77 View Post
A patient on intensive care is ventilated with a frequency of 12 per minute and a tidal volume of 0.6 L. His arterial pH increases to >7.5. What is the most reasonable action to correct this respiratory alkalosis?

(A) decrease dead space
(B) decrease tidal volume
(C) increase minute ventilation
(D) increase oxygen fraction
(E) use positive end-expiratory pressure (PEEP)
i will go for B. Decrease in Tidal volume.
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Old 07-12-2011
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Quote:
Originally Posted by jahn77 View Post
A patient on intensive care is ventilated with a frequency of 12 per minute and a tidal volume of 0.6 L. His arterial pH increases to >7.5. What is the most reasonable action to correct this respiratory alkalosis?

(A) decrease dead space
(B) decrease tidal volume
(C) increase minute ventilation
(D) increase oxygen fraction
(E) use positive end-expiratory pressure (PEEP)
I also think is B)
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Old 07-12-2011
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Correct Answer B is correct answer

Decreasing tidal volume will reduce alveolar ventilation and correct the respiratory alkalosis (B)
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