Anaphylactic shock is a subgroup of which type of shock?

Hypovolemic

Obstructive

Cardiogenic

Distributive

Answer and Explanation

The Correct Answer is D

Choice A rationale:

Hypovolemic shock is a type of shock that occurs when there is a significant loss of blood or fluid volume, leading to decreased cardiac output and tissue perfusion. This can be caused by severe bleeding, dehydration, burns, or other conditions that result in fluid loss. While anaphylaxis can involve some fluid shifts, it is not primarily characterized by a loss of blood or fluid volume.

Key features of hypovolemic shock that distinguish it from anaphylactic shock include:

Prominent signs of dehydration: Dry skin and mucous membranes, decreased urine output, sunken eyes, and poor skin turgor.

Hemodynamic changes: Tachycardia, narrow pulse pressure, and cold extremities due to vasoconstriction to maintain blood pressure.

Laboratory findings: Elevated hematocrit and blood urea nitrogen (BUN) levels, indicating hemoconcentration and decreased kidney perfusion.

Choice B rationale:

Obstructive shock is a type of shock that occurs when there is an obstruction to blood flow, preventing adequate circulation to the body's tissues. This can be caused by conditions such as pulmonary embolism, cardiac tamponade, or tension pneumothorax. Anaphylaxis does not involve a physical obstruction to blood flow.

Key features of obstructive shock that distinguish it from anaphylactic shock include:

Evidence of the underlying obstruction: Jugular venous distension (cardiac tamponade), muffled heart sounds (cardiac tamponade), or respiratory distress (pulmonary embolism or tension pneumothorax).

Distinctive hemodynamic changes: Equalization of diastolic pressures between the right and left ventricles (cardiac tamponade).

Specific imaging findings: Enlarged cardiac silhouette on chest X-ray (pericardial effusion), filling defects in the pulmonary arteries on CT angiography (pulmonary embolism), or hyperexpanded lung fields with a deviated trachea on chest X-ray (tension pneumothorax).

Choice C rationale:

Cardiogenic shock is a type of shock that occurs when the heart is unable to pump enough blood to meet the body's needs. This can be caused by conditions such as heart attack, heart failure, or cardiomyopathy. Anaphylaxis does not primarily involve a failure of the heart's pumping function.

Key features of cardiogenic shock that distinguish it from anaphylactic shock include:

Evidence of heart failure: Pulmonary edema, elevated jugular venous pressure, and a third heart sound (S3 gallop).

Electrocardiogram (ECG) changes: ST-segment elevation or depression, Q waves, or other signs of myocardial ischemia or infarction.

Elevated cardiac enzymes: Troponin and creatine kinase-MB (CK-MB) levels, indicating heart muscle damage.

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Correct Answer is D

Explanation

Choice A rationale:

Respiratory acidosis is characterized by a low pH (less than 7.35), a high PaCO2 (greater than 45 mm Hg), and a normal or high HCO3 (22-26 mEq/L). It occurs when there is a buildup of carbon dioxide in the blood due to impaired ventilation.

The patient's ABGs do not align with respiratory acidosis because the pH is elevated (7.6), and the PaCO2 is within the normal range (40 mm Hg).

Choice B rationale:

Respiratory alkalosis is characterized by a high pH (greater than 7.45), a low PaCO2 (less than 35 mm Hg), and a normal or low HCO3 (22-26 mEq/L). It occurs when there is excessive loss of carbon dioxide through hyperventilation.

The patient's ABGs do not align with respiratory alkalosis because the HCO3 is elevated (32 mEq/L), which is not typical for this condition.

Choice C rationale:

Metabolic acidosis is characterized by a low pH (less than 7.35), a normal or low PaCO2 (less than 40 mm Hg), and a low HCO3 (less than 22 mEq/L). It occurs when there is an excess of acid in the body or a loss of bicarbonate.

The patient's ABGs do not align with metabolic acidosis because the pH is elevated (7.6), and the HCO3 is elevated (32 mEq/L).

Choice D rationale:

Metabolic alkalosis is characterized by a high pH (greater than 7.45), a normal or high PaCO2 (40-45 mm Hg), and an elevated HCO3 (greater than 26 mEq/L). It occurs when there is an excess of bicarbonate in the body or a loss of acid.

The patient's ABGs align with metabolic alkalosis because of the high pH (7.6), normal PaCO2 (40 mm Hg), and elevated HCO3 (32 mEq/L).

A. Remove the tube if the patient gags during insertion. B. Advise the patient to tuck his chin to his chest and swallow. C. Position the patient in a supine position. D. Measure the tube for insertion from the nose tip to the navel.

Correct Answer is B

Explanation

Choice A rationale:

Removing the tube immediately upon patient gagging is not the most appropriate first step. Gagging is a common reflex during nasogastric tube insertion and can often be managed without removing the tube.

Premature removal could lead to unnecessary discomfort for the patient and potential delays in treatment.

The nurse should attempt to reposition the tube or have the patient sip water to facilitate passage before considering removal.

Choice B rationale:

Tucking the chin to the chest and swallowing are essential maneuvers that help guide the tube into the esophagus and reduce the risk of misplacement into the trachea.

These actions close off the airway and open the esophagus, creating a smoother path for the tube.

The nurse should instruct the patient to perform these actions during insertion to promote successful placement.

Choice C rationale:

While a supine position is often used for nasogastric tube insertion, it is not the most crucial factor for success.

Studies have shown that a high-Fowler's position (sitting upright with head elevated) may be equally effective and potentially more comfortable for patients.

The nurse should consider patient comfort and potential contraindications (such as respiratory distress) when choosing the most appropriate position.

Choice D rationale:

Measuring the tube from the nose tip to the navel is an outdated practice that can lead to inaccurate placement. The correct measurement is from the nose tip to the earlobe to the xiphoid process (NEX).

This landmark-based method provides a more reliable estimation of the distance to the stomach.

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Anaphylactic shock is a subgroup of which type of shock?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is analyzing the arterial blood gas (ABG) results of a patient.The patient’s ABGs are: pH:7.6, PaCO2:40 mm Hg, HCO3:32 mEq/L. Which of the following acid-base conditions should the nurse identify the patient is experiencing?

Correct Answer is D

Explanation

A nurse is attending to a patient with a bowel obstruction who has been prescribed a nasogastric tube. What steps should the nurse take during the insertion of the nasogastric tube?

Correct Answer is B

Explanation

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