A client is receiving an intravenous (IV) solution over a short amount of time to replace volume losses. The nurse understands that this IV solution is most likely to be:
isotonic.
hypotonic.
hypertonic.
Hyperosmotic
The Correct Answer is A
A. Isotonic solutions have a similar osmolarity to that of blood plasma, meaning they exert the same osmotic pressure as blood. This equilibrium prevents the movement of water across cell membranes, thereby maintaining cell volume and preventing cellular dehydration or swelling. Examples of isotonic solutions commonly used for intravenous fluid replacement include 0.9% saline (normal saline) and lactated Ringer's solution.
B. Hypotonic solutions have a lower osmolarity than blood plasma, meaning they exert less osmotic pressure than blood. When administered, hypotonic solutions cause water to move into cells, leading to cellular swelling. While hypotonic solutions can help hydrate cells and replenish intracellular fluid, they are not typically used for rapid volume replacement because they can exacerbate extracellular fluid deficits and cause complications such as cerebral edema or cardiovascular collapse.
C. Hypertonic solutions have a higher osmolarity than blood plasma, meaning they exert greater osmotic pressure than blood. When administered, hypertonic solutions cause water to move out of cells, leading to cellular shrinkage. Hypertonic solutions are often used to expand intravascular volume in cases of severe hypovolemia or shock, as they rapidly increase blood osmolarity and draw fluid from the interstitial space into the bloodstream. Examples of hypertonic solutions include 3% saline and 5% dextrose in 0.9% saline.
D. Hyperosmotic solutions have an elevated osmolarity compared to blood plasma, indicating a higher concentration of solutes. These solutions exert osmotic pressure that draws water out of cells, leading to cellular dehydration. While hyperosmotic solutions are not commonly used for rapid volume replacement due to their pot
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","D","E"]
Explanation
C. Sleep plays a crucial role in stress management and resilience. Adequate sleep helps regulate stress hormones such as cortisol, promotes emotional regulation, and enhances coping mechanisms. Chronic sleep deprivation can lead to increased stress levels and reduced ability to cope with stressors.
D. Sleep is essential for the restoration and repair of both the mind and body. During sleep, the body undergoes processes such as tissue repair, muscle growth, and memory consolidation. Sleep also allows the brain to clear toxins and waste products accumulated during wakefulness, promoting cognitive function and overall well-being.
E. One of the functions of sleep is to conserve energy. During sleep, metabolic rate and energy expenditure decrease, allowing the body to conserve resources for essential physiological processes. Sleep helps replenish energy stores, repair cellular damage, and prepare the body for the next day's activities.
A. Sleep has been shown to have analgesic effects and can improve pain tolerance. Adequate sleep helps reduce the perception of pain and promotes the release of endogenous pain-relieving substances in the body.
B. During sleep, blood pressure typically decreases as part of the normal sleep-wake cycle. However, certain sleep disorders, such as sleep apnea, may lead to fluctuations in blood pressure during sleep. Overall, quality sleep is important for maintaining cardiovascular health and regulating blood pressure.
Correct Answer is B
Explanation
B. A PICC line is a long, flexible catheter inserted into a peripheral vein, typically in the upper arm, and advanced until the tip lies in the superior vena cava or the cavoatrial junction. PICC lines are suitable for long-term venous access and are often used for administering medications, including antibiotics, over several weeks or months. They offer stable and reliable access, reducing the need for frequent venipunctures.
A. Butterfly needles are typically used for short-term venous access, such as for blood draws or administering medications that do not require long-term therapy. They are not suitable for prolonged use or for administering medications over several weeks, as they are not designed for secure and stable access over an extended period.
C. A peripheral IV-lock, also known as a saline lock or heplock, is a short catheter inserted into a peripheral vein and then capped off for intermittent use. While peripheral IV-locks are suitable for short-term venous access, they are not ideal for prolonged therapy lasting several weeks. Additionally, they may not provide the necessary stability and reliability for administering IV antibiotics over an extended period.
D. A small gauge peripheral angiocath refers to a short catheter inserted into a peripheral vein for intravenous access. While a larger gauge catheter, such as a 16-gauge, may allow for faster infusion rates and is suitable for certain situations requiring rapid fluid administration, it may not be the most appropriate choice for long-term IV antibiotic therapy. The choice of gauge depends on factors such as the client's vein size, the viscosity of the medication, and the duration of therapy.
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