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 A
Explanation
A. "STAT" stands for "immediately" or "at once" in medical terminology. When a medication order is marked as STAT, it means that the medication should be administered as soon as possible, without delay. This abbreviation is used for urgent situations where the medication needs to be given promptly.
B. "PRN" stands for "pro re nata," which translates to "as needed" in Latin. When a medication order is marked as PRN, it means that the medication should be administered as required based on the patient's needs or symptoms. The timing of administration is not fixed but depends on specific conditions or situations, such as pain or nausea.
C. "TID" stands for "ter in die," which translates to "three times a day" in Latin. When a medication order is marked as TID, it means that the medication should be administered three times daily, at regular intervals throughout the day.
D. "QID" stands for "quater in die," which translates to "four times a day" in Latin. When a medication order is marked as QID, it means that the medication should be administered four times daily, at regular intervals throughout the day.
Correct Answer is D
Explanation
D. As individuals age, there is a natural decline in the amount of deep sleep (slow-wave sleep or Stage N3 sleep) they experience. Older adults tend to spend less time in deep sleep and may experience more fragmented sleep patterns, with more frequent awakenings during the night. This reduction in deep sleep is a normal part of the aging process and is associated with changes in sleep architecture and physiology.
A. Research indicates that a significant portion of the population does not get enough sleep, with many adults experiencing sleep deprivation due to various factors such as lifestyle, work schedules, and sleep disorders.
B. Teenagers often have a natural tendency to stay up later and have difficulty waking up early due to changes in their circadian rhythm during adolescence. This shift in sleep patterns, known as delayed sleep phase syndrome, can result in later bedtimes and waking times for teenagers.
C. Sleep needs typically change over the course of a person's lifetime. Infants and young children require more sleep than adults, with sleep duration gradually decreasing as individuals age.
Additionally, factors such as lifestyle, health status, and environmental influences can affect sleep needs at different stages of life.
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