A school nurse is assessing an adolescent who reports feeling shaky and is having difficulty speaking and concentrating on the questions the nurse is asking. The nurse checks the adolescent's blood glucose level and identifies a value of 55 mg/dL. Which of the following findings should the nurse expect?

A. Polyuria (excessive urination) is not a symptom of hypoglycemia; it is more commonly associated with hyperglycemia (high blood sugar).

B. Deep rapid respirations are more characteristic of diabetic ketoacidosis (DKA), a complication of uncontrolled diabetes that leads to high blood sugar levels and metabolic acidosis.

C. Dry, flushed skin is not a typical symptom of hypoglycemia; it might be associated with conditions like dehydration or heat exposure, but not with low blood sugar.

D. Tachycardia

Explanation: The symptoms described by the adolescent (feeling shaky, difficulty speaking, difficulty concentrating) along with a blood glucose level of 55 mg/dL indicate hypoglycemia, which is low blood sugar. Tachycardia, or a rapid heart rate, is a common physiological response to hypoglycemia. The body increases the heart rate in an attempt to improve blood flow and deliver glucose to the brain and other vital organs. This is part of the body's fight-or-flight response to low blood sugar.

A. Elevated blood glucose is remarkable with Cushing's Triad:

Elevated blood glucose is not one of the components of Cushing's Triad. The triad focuses on cardiovascular and respiratory changes associated with increased intracranial pressure, not blood glucose levels.

B. Cushing's Triad includes a positive Macawen's sign:

Macawen's sign is not part of Cushing's Triad. Cushing's Triad is specifically related to the physiological responses seen in response to increased intracranial pressure and is not associated with Macawen's sign.

C. Cushing's Triad includes tachycardia, seizures and rapid respirations:

This option is not accurate. Cushing's Triad involves bradycardia (slow heart rate), irregular respirations, and a widening pulse pressure. Tachycardia (rapid heart rate) and seizures are not part of Cushing's Triad but might be indicative of other medical conditions or complications.

D. Bradycardia, irregular respirations and a widening pulse pressure.

Explanation: Cushing's Triad is a set of three clinical signs that are indicative of increased intracranial pressure (ICP) and are considered ominous as they suggest serious brain injury or pathology. The triad consists of:

Bradycardia: This refers to a slow heart rate. As intracranial pressure increases, it can lead to a decreased heart rate due to pressure on the brainstem, which is involved in regulating heart rate.

Irregular Respirations: Increased ICP can affect the brainstem's control over breathing, leading to irregular patterns of breathing, often known as Cheyne-Stokes respiration. This is characterized by periods of rapid breathing followed by apnea (temporary cessation of breathing).

Widening Pulse Pressure: Pulse pressure is the difference between systolic and diastolic blood pressure. An increase in ICP can cause an increase in systolic blood pressure and a decrease in diastolic blood pressure, leading to a widening pulse pressure.