For each manifestation, specify whether the manifestation is expected in a person with fluid excess or fluid deficit.
Hyponatremia and pulmonary congestion are signs of fluid excess.
Weight loss and weak pulses are signs of fluid deficit.
Hypertension and peripheral edema are signs of fluid excess.
All of the above correctly categorize fluid excess and deficit manifestations.
The Correct Answer is D
Choice A rationale
Fluid volume excess occurs when there is too much water and sodium in the extracellular space. Hyponatremia, or a low serum sodium level less than 135 mEq/L, can occur due to hemodilution. Pulmonary congestion happens when the heart cannot pump the excess volume, leading to fluid backing up into the lungs. This increases hydrostatic pressure in the pulmonary capillaries, causing fluid to leak into the alveoli, which results in crackles and shortness of breath.
Choice B rationale
Fluid volume deficit, or dehydration, involves a loss of body fluids. Weight loss is a very sensitive indicator of fluid loss, as acute changes in weight are usually due to water fluctuations. Weak or thready pulses occur because there is less circulating blood volume to create a strong pressure wave during cardiac contraction. Other signs include dry mucous membranes and decreased skin turgor. Monitoring intake and output is essential for managing patients with these manifestations.
Choice C rationale
Hypertension and peripheral edema are classic signs of fluid volume excess. As the total volume of circulating blood increases, the pressure against the arterial walls rises, leading to high blood pressure. Peripheral edema occurs because the increased capillary hydrostatic pressure forces fluid out of the vascular space and into the surrounding interstitial tissues, commonly seen in the ankles and feet. This indicates the body's inability to effectively clear or distribute the excess fluid load.
Choice D rationale
This choice is correct because it encompasses all the accurate clinical correlations mentioned in the previous sections. Fluid volume excess is consistently linked with hyponatremia, pulmonary congestion, hypertension, and edema due to overhydration and pressure changes. Conversely, fluid volume deficit is correctly linked with weight loss and weak pulses due to the reduction in total body water and circulating pressure. Understanding these patterns is fundamental for nurses and clinicians to properly assess and treat electrolyte imbalances.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Euphoria is the intense feeling of pleasure, excitement, or happiness often sought by individuals with substance use disorders. It results from the rapid release of dopamine within the brain reward system, specifically the nucleus accumbens. This neurochemical surge alters the perception of reality, providing an emotional high that reinforces the repetitive behavior of drug ingestion. This process is the primary driver behind the initial development of psychological dependence and continued drug seeking.
Choice B rationale
This description refers to the loss of control, a hallmark of addiction where the prefrontal cortex fails to regulate impulsive behaviors. While euphoria may motivate the initial use, the inability to stop despite prior intentions is a behavioral manifestation of impaired executive function. It highlights the transition from voluntary use to compulsive use. Euphoria is the subjective emotional state, whereas this choice describes the behavioral failure to adhere to self-imposed limits on substance consumption.
Choice C rationale
This statement defines craving, which is a powerful and overwhelming desire for the substance. Cravings are often triggered by environmental cues associated with past use and are linked to the amygdala and hippocampus. While euphoria is the positive reinforcement felt during use, craving is the motivational state that occurs in its absence. Cravings persist even when the individual is aware of the significant negative social, physical, and legal consequences resulting from their addiction.
Choice D rationale
This explains withdrawal, a physiological response occurring when a substance is discontinued after a period of prolonged use. The body adapts to the presence of the drug to maintain homeostasis; once the drug is removed, the system becomes overactive or depressed, leading to physical illness. Withdrawal is often the opposite of euphoria, characterized by dysphoria and physical pain. It is a sign of physical dependence rather than the pleasurable high described as euphoria.
Correct Answer is C
Explanation
Choice C rationale
Angina pectoris is the classic manifestation of coronary insufficiency in patients with coronary artery disease. It occurs when the demand for oxygen by the myocardium exceeds the supply provided by the narrowed coronary arteries. This imbalance leads to transient ischemia and the production of lactic acid through anaerobic metabolism. The normal range for myocardial oxygenation is maintained at rest, but during insufficiency, the resulting pain serves as a warning that the tissue is being starved.
Choice A rationale
A rash is an integumentary manifestation usually related to allergic reactions, infections, or inflammatory skin conditions. It is not physiologically connected to the blood flow within the coronary arteries. Coronary insufficiency specifically affects the heart muscle's ability to function and does not present as localized or systemic skin eruptions. Skin changes in cardiac disease are usually limited to pallor or cyanosis due to poor systemic perfusion rather than a dermatological rash.
Choice B rationale
Polyuria, the production of abnormally large volumes of urine, is typically associated with conditions like diabetes mellitus or diabetes insipidus. It is not a manifestation of coronary insufficiency. In fact, severe coronary insufficiency leading to reduced cardiac output is more likely to cause oliguria, or decreased urine output, as the kidneys receive less blood flow and activate the renin-angiotensin-aldosterone system to retain fluid and maintain systemic blood pressure.
Choice D rationale
While chronic vascular issues can sometimes lead to hair loss on the lower extremities due to peripheral artery disease, acute or chronic coronary insufficiency does not cause hair loss. Hair loss is often related to hormonal imbalances, genetics, or localized poor circulation in the limbs. The insufficiency of the coronary arteries specifically targets the heart's metabolic needs and does not have a direct pathophysiological mechanism that would result in the loss of hair.
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