A nurse is reviewing laboratory results for a client who is taking warfarin. Which of the following laboratory tests determines if the dose of medication is within the recommended target range?

Choice A reason: Raising the head of the bed during transfer does not prioritize ergonomic principles. It may strain the nurse’s back or misalign the client, increasing injury risk. Ergonomics focuses on neutral spine alignment and mechanical aids to reduce physical strain during client transfers.
Choice B reason: Placing pillows under the head is a comfort measure, not an ergonomic principle. Ergonomics emphasizes reducing musculoskeletal strain through proper mechanics or devices. Pillows do not directly prevent nurse injuries, unlike transfer devices that minimize physical effort during client movement.
Choice C reason: Using a lateral transfer device, like a slide board, aligns with ergonomic principles by reducing manual lifting and spinal strain. It prevents back injuries, ensuring safe client transfer. This evidence-based practice supports occupational health guidelines, minimizing musculoskeletal risks for nurses during patient handling.
Choice D reason: Standing close during ambulation ensures client stability but is not a primary ergonomic principle. Ergonomics focuses on equipment and mechanics to reduce strain, not proximity, which addresses patient safety more than nurse injury prevention during transfers or repositioning tasks.

Choice A reason: Decreasing fluid intake to firm stools is incorrect, as adequate hydration (2-3 L/day) is essential to prevent constipation, especially with opioids like oxycodone, which slow intestinal motility. Low fluid intake hardens stools, exacerbating constipation risk by reducing water content in the colon, indicating a misunderstanding of prevention strategies.
Choice B reason: Increasing dietary fiber intake (25-35 g/day) adds bulk to stools, stimulating peristalsis and counteracting opioid-induced slowed motility. Soluble and insoluble fiber, found in fruits, vegetables, and whole grains, promotes regular bowel movements. This statement reflects correct understanding of dietary measures to prevent constipation during opioid therapy.
Choice C reason: Taking a laxative only when constipated is reactive, not preventive. Opioids like oxycodone commonly cause constipation by reducing peristalsis via mu-opioid receptors in the gut. Prophylactic use of stool softeners or laxatives is recommended to maintain regular bowel movements, making this statement incorrect as it lacks a preventive approach.
Choice D reason: Exercising less to conserve energy worsens constipation, as physical activity stimulates intestinal motility, countering opioid-induced slowing. Regular movement, like walking, promotes bowel function by enhancing peristalsis and blood flow to the gut. This statement indicates a misunderstanding, as reduced activity increases constipation risk.