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. These are indicative of inflammation within the vein, which is characteristic of phlebitis. Warmth is a common sign of inflammation, and the palpable cord suggests that the vein may be hardened or cord- like due to inflammation and irritation.
B. While this could indicate some form of vascular injury or extravasation, it is not a typical presentation of phlebitis. Phlebitis involves inflammation of the vein, which may cause redness, warmth, and tenderness along the course of the vein, but it typically does not manifest as a raised ecchymotic (bruised) area.
C. Swelling occurs due to inflammation within the vein, and tenderness is often present as a result of the irritation and inflammation. These symptoms are commonly observed in cases of phlebitis but are not specific.
D. These are not typical signs of phlebitis. Blanching (turning white) and coolness of the skin may suggest reduced blood flow to the area, which could occur in cases of ischemia or thrombosis but are not characteristic of phlebitis.
Correct Answer is ["B","C","D"]
Explanation
B. Increased mental acuity, or heightened alertness and cognitive function, is a characteristic response during the alarm stage of GAS. The body's stress response enhances mental focus and perception to help the individual recognize and respond to the stressor effectively.
C. During the alarm stage of GAS, the sympathetic nervous system is activated, leading to the release of adrenaline (epinephrine) and norepinephrine. These hormones stimulate the kidneys to conserve water and sodium, leading to decreased urine output and increased urine retention. Therefore, increased urine retention is an expected physiologic manifestation in the alarm stage.
D. During the alarm stage, the sympathetic nervous system activation leads to bronchodilation, allowing for increased airflow to the lungs. This facilitates improved oxygenation of the blood and enhances the individual's ability to respond to the stressor by increasing oxygen delivery to tissues.
A. During the alarm stage of GAS, the body initiates the fight-or-flight response, which leads to the release of stress hormones such as cortisol and adrenaline. These hormones increase blood glucose levels through processes like glycogenolysis and gluconeogenesis to provide energy for the body to respond to the stressor. Therefore, decreased blood glucose is not an expected manifestation in the alarm stage.
E. Decreased pupil size: During the alarm stage of GAS, the sympathetic nervous system is activated, leading to the dilation of pupils (mydriasis). This allows for improved visual acuity and peripheral vision, enhancing the individual's ability to detect potential threats or stimuli in the environment.
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