A nurse is collecting data for a client who has tension pneumothorax. Which of the following findings should the nurse expect following tracheal deviation?
Respiratory alkalosis
Increased venous return
Decreased cardiac output
Dilated ventricles
The Correct Answer is C
A. Respiratory alkalosis: Respiratory alkalosis is generally associated with hyperventilation and is not directly caused by tension pneumothorax. In tension pneumothorax, the primary issues are related to pressure changes within the thoracic cavity, not respiratory alkalosis.
B. Increased venous return: In tension pneumothorax, venous return is actually decreased due to the increased intrathoracic pressure compressing the great vessels, which impedes blood flow back to the heart.
C. Decreased cardiac output: Tension pneumothorax causes a significant increase in intrathoracic pressure, leading to compression of the heart and great vessels, which results in decreased venous return and ultimately decreased cardiac output. This is a critical and life-threatening consequence of tension pneumothorax.
D. Dilated ventricles: Dilated ventricles are more commonly seen in chronic heart conditions such as heart failure, rather than in acute tension pneumothorax. Tension pneumothorax typically results in reduced ventricular filling rather than dilation.
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Related Questions
Correct Answer is D
Explanation
A. BNP does not promote the synthesis of angiotensin II; instead, it counteracts the effects of the renin-angiotensin-aldosterone system (RAAS) by reducing fluid retention and blood pressure, which is the opposite of what angiotensin II does.
B. BNP does not increase heart rate or cardiac contractility. Its role is primarily in reducing cardiac workload by lowering blood pressure and decreasing fluid volume.
C. BNP does not increase blood pressure; rather, it acts to decrease it by causing vasodilation and inhibiting the effects of aldosterone, which would otherwise increase blood pressure by promoting sodium and water retention.
D. BNP decreases blood pressure by causing vasodilation and promoting the excretion of sodium and water, which reduces blood volume and, consequently, lowers the blood pressure. This is its primary role in cardiovascular regulation, especially in response to heart failure.
Correct Answer is A
Explanation
A. Cardiac enlargement: Chronic hypoxia leads to increased workload on the heart as it works harder to deliver oxygen to tissues. This can result in cardiac enlargement or right-sided heart failure due to pulmonary hypertension, a common consequence of long-term hypoxia.
B. Exophthalmos: Exophthalmos is protrusion of the eyes and is typically associated with thyroid disorders, such as Graves' disease, rather than chronic hypoxia.
C. Gastric ulcerations: While stress and certain medications can lead to gastric ulcerations, they are not directly caused by chronic hypoxia. Chronic hypoxia mainly affects the cardiovascular and pulmonary systems.
D. Urinary tract infections: Chronic hypoxia does not typically lead to urinary tract infections. UTIs are more commonly associated with factors such as poor hygiene, urinary obstruction, or immunosuppression.
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