Continuing Education in Anaesthesia, Critical Care & Pain | Volume 5 Number 5 2005 © The Board of Management and Trustees of the British Journal of Anaesthesia [2005]. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Multiple Choice Questions
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- 106. With respect to the history of nitrous oxide:
- It was discovered in the middle of the 19th century.
- It was discovered by Humphrey Davy.
- It used to be known as dephlogisticated nitrous air.
- Nitrous oxide was first made by adding iron to nitric acid.
- Nitrous oxide was used as a form of entertainment at country fairs.
- 107. Concerning clinical applications of nitrous oxide:
- It can be used safely one week after intraocular SF6 instillation.
- Nitrous oxide mediated changes in middle ear pressure may disrupt ossicular chain repair.
- During laparoscopy, combustion may occur if the concentration of nitrous oxide in the pneumoperitoneum exceeds 29%.
- Nitrous oxide will cause an increase in the size of a carbon dioxide gas embolus.
- The teratogenicity of nitrous oxide is due only to impaired DNA synthesis.
- 108. Concerning the physical properties:
- Nitrous oxide does not support combustion.
- The
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- It was discovered in the middle of the 19th century.