When should the nurse conduct an Allen's test?
Just before arterial blood gasses are drawn peripherally.
Prior to attempting a cardiac output calculation.
To assess for presence of a deep vein thrombus in the leg.
When pulmonary artery pressures are obtained.
The Correct Answer is A
Allen's test is a procedure used to assess the patency of the ulnar artery and the collateral circulation of the hand. It is performed to determine the adequacy of collateral circulation before obtaining arterial blood gases from the radial artery. The test helps ensure that the ulnar artery is functioning properly and can supply blood to the hand if the radial artery is used for blood sampling or other invasive procedures.
The test involves occluding both the ulnar and radial arteries while the patient clenches their fist. The nurse then releases pressure on the ulnar artery while maintaining occlusion of the radial artery. The hand should quickly regain normal coloration, indicating adequate collateral circulation.
It's important to note that the Allen's test is specific to the assessment of collateral circulation in the hand and is not used for other purposes such as assessing deep vein thrombosis, cardiac output calculation, or obtaining pulmonary artery pressures.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A) Incorrect- Furosemide is a loop diuretic used to treat conditions such as edema and hypertension. It does not directly relate to the client's history of gout or the risk of calcium kidney stones.
B) Incorrect- Low-dose aspirin is often used for its antiplatelet effects to prevent cardiovascular events. It does not directly relate to the client's history of gout or the risk of calcium kidney stones.
C) Correct- Allopurinol is a medication used to treat gout by reducing the production of uric acid in the body. However, allopurinol can also increase the risk of forming calcium oxalate kidney stones, which is the type of kidney stone mentioned in the client's history. Calcium oxalate stones are the most common type of kidney stone, and they are composed primarily of calcium and oxalate. In this case, the client has a history of gout and is prescribed allopurinol. The nurse should bring the client's prescription for allopurinol to the healthcare provider's attention because
it has the potential to contribute to the formation of kidney stones, which could exacerbate the client's existing condition.
D) Incorrect- Enalapril is an angiotensin-converting enzyme (ACE) inhibitor used to treat hypertension and heart failure. It does not directly relate to the client's history of gout or the risk of calcium kidney stones.
Correct Answer is ["A","B","C","E"]
Explanation
A) Correct- Assessing the child's pulse helps determine their cardiac status and whether they have a detectable heartbeat. This information is essential for deciding the appropriate interventions.
B) Correct- Placing a cervical collar is necessary if there is any suspicion of cervical spine injury due to the fall or submersion. This action helps stabilize the neck and prevent further damage to the spine.
C) Correct- Checking for open wounds is important to assess for potential sources of bleeding or infection that may require immediate attention.
D) Incorrect- While child safety is important, the immediate priority in this situation is assessing and stabilizing the child's medical condition. Child protective services may be involved later if there are concerns about the circumstances surrounding the incident.
E) Correct- Assessing the airway is of utmost importance to ensure that the child can breathe. In cases of near-drowning, ensuring a clear airway is crucial for oxygenation.
F) Incorrect- While establishing intravenous access may be important for certain interventions, it is not one of the immediate priorities in this situation. Ensuring the child's airway, breathing, and circulation take precedence.
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