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 D
Explanation
D. Consuming alcoholic beverages, especially close to bedtime, can disrupt sleep patterns and exacerbate insomnia. While alcohol may initially have a sedative effect and induce drowsiness, it can lead to fragmented and poor-quality sleep later in the night, resulting in worsened insomnia symptoms. Therefore, this statement indicates a need for further education by the nurse regarding the negative impact of alcohol consumption on sleep and the importance of avoiding alcohol before bedtime to improve sleep quality.
A. Keeping the bedroom cool (around 65 degrees Fahrenheit) is generally recommended for promoting sleep because a cooler temperature can help facilitate the body's natural temperature drop, which occurs during sleep onset.
B. Engaging in regular physical activity, such as taking a long walk during the day, can be beneficial for promoting better sleep. Physical activity during the day can help regulate the sleep-wake cycle, reduce stress, and improve overall sleep quality. Therefore, this statement reflects a positive sleep hygiene practice and does not indicate a need for further education.
C. This statement suggests an understanding of the importance of associating the bed with sleep and avoiding activities that may interfere with sleep, such as paying bills or working in bed. Maintaining the bed as a place primarily for sleep and intimacy can help condition the mind and body to associate the bed with relaxation and sleep.
Correct Answer is D
Explanation
D. In metabolic acidosis, the pH would be low (acidemic) and the HCO3 level would be below the normal range. In the provided ABG results, the pH is low (acidemic) and the HCO3 level is below the normal range, indicating metabolic acidosis.
A. In respiratory alkalosis, the pH would be elevated (alkalotic) and the PaCO2 would be below the normal range (hypocapnia). However, in the provided ABG results, the pH is low (acidemia) rather than high, ruling out respiratory alkalosis.
B. In respiratory acidosis, the pH would be low (acidemic) and the PaCO2 would be above the normal range (hypercapnia). However, in the provided ABG results, the PaCO2 is within the normal range, ruling out respiratory acidosis.
C. In metabolic alkalosis, the pH would be elevated (alkalotic) and the HCO3 level would be above the normal range. However, in the provided ABG results, the pH is low (acidemic) and the HCO3 level is below the normal range, ruling out metabolic alkalosis.
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