COPD exacerbation case, after Oxygen supplement the O2 become: 99%, what of the following would benefit the patient?
سؤال مجاني 7 من 10 اليوم · اشترك وكمّل بدون حد
اعرض الإجابة
الإجابة والشرح
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الإجابة: C. Reduce oxygen to target SpO₂ 88–92%
In a COPD exacerbation, oxygen is titrated to a target SpO2 of 88-92%. SpO2 of 99% is too high and risks CO2 retention (oxygen-induced hypercapnia), so the oxygen should be reduced, not increased or kept the same. NIV or intubation are for acidosis or respiratory failure, not for high saturation.
ليش كل خيار صح أو غلط
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A
ليش غلط
Raising oxygen further goes the wrong way: a saturation above 92% already puts a COPD patient at risk of CO2 retention.
✓ Step Up To Medicine 6th Edition 2024 (COPD).pdf · p. 11 -
B
ليش غلط
NIPPV is indicated for respiratory acidosis (PaCO2 ≥ 45 and pH ≤ 7.35); a saturation of 99% is not an indication, it means too much oxygen.
✓ COPD.pdf · p. 11 -
C
ليش صح
Oxygen is titrated to keep saturation at 88-92%; above 92% risks CO2 retention (V/Q mismatch and the Haldane effect), so the flow should be reduced.
✓ Step Up To Medicine 6th Edition 2024 (COPD).pdf · p. 11 -
D
ليش غلط
Intubation and mechanical ventilation are high-risk procedures in AECOPD and should be a last resort (e.g. NIPPV not tolerated or inadequate), not a response to a high saturation.
✓ COPD.pdf · p. 12 -
E
ليش غلط
Keeping the same flow keeps SaO2 at 99%, above the 88-92% target, where there is a risk of CO2 retention.
✓ Step Up To Medicine 6th Edition 2024 (COPD).pdf · p. 11
- المصدر
- COPD.pdf · p. 11
Step Up To Medicine 6th Edition 2024 (COPD).pdf · p. 11 - المحاضرة
- COPD Exacerbation · Pulmonology · Module B
- ظهر في
- Respi bank · Respi bank · EOM B40