Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam

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Which statement is correct regarding heparin and LMWHs?

  1. Only LMWHs require frequent laboratory monitoring

  2. Heparin is derived from synthetic sources

  3. LMWHs have a more predictable anticoagulant response

  4. Both can be used interchangeably in all situations

The correct answer is: LMWHs have a more predictable anticoagulant response

LMWHs have a more predictable anticoagulant response compared to heparin. While both heparin and LMWHs are used as anticoagulants, only heparin requires frequent laboratory monitoring. Heparin is derived from natural sources, specifically animal tissues, while LMWHs are derived from synthetic sources. While both heparin and LMWHs are effective in preventing blood clots, they are not interchangeable and should be used in different situations based on factors like patient weight and medical conditions. Therefore, the correct statement is that LMWHs have a more predictable anticoagulant response, not that they can be used interchangeably with heparin in all situations.

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