Three members of one household develop headache, dizziness and nausea after using a faulty gas heater. One patient has an oxygen saturation of 99% on ...

Question

Three members of one household develop headache, dizziness and nausea after using a faulty gas heater. One patient has an oxygen saturation of 99% on room air and a normal chest examination. Which immediate approach is most informative and therapeutic?

Accepted Answer

Give high-concentration oxygen and measure carboxyhaemoglobin

Answer

Give oxygen titrated to 94–98% using conventional pulse saturation

Answer

Measure arterial methemoglobin before selecting oxygen delivery

Answer

Arrange chest radiography and discharge if no infiltrate is present

Answer

Use venous lactate as the principal biochemical marker of exposure

Chest Pain (hs-troponin algorithm) — MRCEM SBA MCQ

Three members of one household develop headache, dizziness and nausea after using a faulty gas heater. One patient has an oxygen saturation of 99% on room air and a normal chest examination. Which immediate approach is most informative and therapeutic?