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Questions and Answers
What is pseudohyponatraemia?
What is pseudohyponatraemia?
- Hyponatraemia due to hyperglycaemia or administration of mannitol
- An artefactual result due to a reduction in plasma water caused by marked hyperlipidaemia or hyperproteinaemia (correct)
- Hyponatraemia occurring in association with reduced plasma osmolality
- Hyponatraemia caused by collection of a blood specimen from a vein close to a site at which fluid is being administered intravenously
What is the main cause of hyperosmolar hyponatraemia?
What is the main cause of hyperosmolar hyponatraemia?
- Hyperglycaemia (correct)
- Administration of mannitol
- Shift of water out of the cells into the ECF in response to osmotic effects
- Reduced plasma osmolality
What can cause artefactual 'hyponatraemia'?
What can cause artefactual 'hyponatraemia'?
- Reduced plasma osmolality
- Collection of a blood specimen from a vein close to a site at which fluid is being administered intravenously (correct)
- Marked hyperlipidaemia or hyperproteinaemia
- Hyperglycaemia
What characterizes true hyponatraemia?
What characterizes true hyponatraemia?
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What effect can marked hyperlipidaemia or hyperproteinaemia have on sodium concentration measurements?
What effect can marked hyperlipidaemia or hyperproteinaemia have on sodium concentration measurements?
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