What manifestation indicates a person with type 2 diabetes mellitus may be experiencing hypoglycemia?
Restlessness.
Bradycardia.
Polyuria.
Fruity breath.
The Correct Answer is A
Choice A rationale
Restlessness is an early neurological sign of hypoglycemia, which occurs when blood glucose levels drop below approximately 70 mg/dL. As the brain is deprived of its primary fuel source, the body triggers a sympathetic "fight or flight" response. This release of epinephrine leads to irritability, nervousness, and restlessness. Identifying these behavioral changes is crucial for early intervention before the patient's condition progresses to more severe symptoms like confusion, seizures, or a loss of consciousness.
Choice B rationale
Bradycardia is not typically associated with hypoglycemia. Instead, the body usually exhibits tachycardia, or a rapid heart rate, as part of the adrenergic response to low blood sugar. When blood glucose falls, the adrenal glands release epinephrine, which increases the heart rate and force of contraction. A slow heart rate would be an unusual finding and might suggest a different underlying pathology or the use of medications like beta-blockers that mask the symptoms of hypoglycemia.
Choice C rationale
Polyuria, or excessive urination, is a classic symptom of hyperglycemia, not hypoglycemia. In diabetes, when blood glucose is excessively high, the kidneys cannot reabsorb all the filtered sugar, leading to osmotic diuresis where water follows glucose into the urine. In hypoglycemia, the body is trying to conserve energy and fuel, and there is no excess sugar to cause this diuretic effect. Polyuria is part of the "three Ps" of high blood sugar alongside polydipsia and polyphagia.
Choice D rationale
Fruity-smelling breath is a hallmark sign of diabetic ketoacidosis, a complication associated with severe hyperglycemia and insulin deficiency. This scent is caused by the presence of acetone, a byproduct of ketone body production as the body breaks down fat for energy. Hypoglycemia involves a lack of sugar rather than the overproduction of ketones from high sugar levels. Therefore, a fruity odor on the breath would indicate that the patient's blood sugar is dangerously high, not low.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
High altitudes present a lower partial pressure of oxygen in the atmosphere, which directly leads to systemic hypoxemia. In patients with sickle cell anemia, deoxygenated hemoglobin S polymerizes into rigid, rod-like structures that distort the red blood cell into a sickle shape. This process occludes microvasculature, leading to tissue ischemia and infarction. Therefore, exercising at high altitudes is contraindicated as it significantly increases the risk of a vaso-occlusive sickling crisis.
Choice B rationale
Prescribed pain medications, such as opioids or non-steroidal anti-inflammatory drugs, are essential for managing the intense pain associated with an ongoing vaso-occlusive crisis. However, these medications do not address the underlying physiological triggers of sickling itself. While they provide symptomatic relief and improve the quality of life during an episode, they do not function as a primary preventative measure to stop the initial formation of sickled erythrocytes in the bloodstream.
Choice C rationale
Dehydration leads to increased blood viscosity and a higher concentration of hemoglobin S within the red blood cells. Reduced plasma volume slows down the transit time of erythrocytes through the narrow capillaries, providing more time for deoxygenation and subsequent polymerization of hemoglobin. Maintaining adequate hydration is a critical preventative strategy because it ensures optimal blood flow and dilutes the concentration of sickling-prone cells, thereby reducing the likelihood of vessel occlusion and crisis.
Choice D rationale
While a balanced diet is important for overall health, a specific high-protein or high-fat diet has no direct scientific link to the prevention of erythrocyte sickling. Sickle cell anemia is a genetic hemoglobinopathy, not a nutritional deficiency that responds to macronutrient manipulation. High-fat diets may actually increase cardiovascular risks or lead to gallbladder issues, which are already common complications in this population, but they do not stabilize the hemoglobin molecule or prevent crises.
Correct Answer is B
Explanation
Choice A rationale
Fatigue is a common symptom of chronic obstructive pulmonary disease due to the increased work of breathing and chronic hypoxemia. However, fatigue is a subjective, systemic manifestation of the body's struggle to maintain oxygen levels. It is not a direct anatomical result of air trapping or overinflation. While related to the overall disease process, it does not describe the physical structural changes that occur in the thoracic cavity because of the loss of lung elasticity.
Choice B rationale
Barrel chest is a physical deformity where the anteroposterior diameter of the chest increases, making it reach a 1: ratio with the lateral diameter. This occurs in COPD because chronic air trapping and the loss of elastic recoil in the lungs keep the rib cage in a partially expanded state. The diaphragm flattens, and the chest wall stays puffed out to accommodate the permanently overinflated lungs. This change is a hallmark anatomical sign of advanced obstructive lung disease.
Choice C rationale
A lack of appetite, or anorexia, often occurs in advanced COPD because the act of eating can cause shortness of breath, and the flattened diaphragm puts pressure on the stomach. While this leads to weight loss and frailty, it is a secondary nutritional complication. It is not a direct mechanical result of air trapping. Appetite loss is a metabolic and functional consequence of the high energy cost of breathing rather than a physical manifestation of lung overexpansion.
Choice D rationale
Clubbed fingers, characterized by the enlargement of the fingertips and loss of the nail bed angle, are a sign of chronic tissue hypoxia. While frequently seen in various chronic lung and heart diseases, clubbing is a result of long-term low oxygen levels in the peripheral tissues and changes in vascularity. It is not specifically caused by the mechanical overinflation or air trapping in the lungs. It is a sign of systemic oxygen debt rather than pulmonary air volume.
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