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 - Developing and implementing new screening protocols does not directly indicate the effectiveness of a primary prevention program. It might indicate improved detection, but not necessarily prevention.
B) Incorrect - This outcome relates to secondary prevention (rehabilitation after disease complications) rather than primary prevention.
C) Correct- An improvement in average client scores on risk factor knowledge tests suggests that the primary prevention program has successfully educated clients about behaviors and practices that can help prevent sexually transmitted diseases. This improvement indicates that clients have a better understanding of the risks and protective measures, which is a key indicator of program effectiveness.
D) Incorrect - Diagnosing clients early in their disease process is an outcome of early detection (secondary prevention), not primary prevention.
Correct Answer is C
Explanation
Emphysema is a chronic obstructive pulmonary disease (COPD) characterized by the destruction of lung tissue and loss of elasticity in the alveoli. This leads to poor gas exchange, specifically the reduced ability of oxygen to enter the bloodstream and carbon dioxide to be eliminated from the body. Impaired gas exchange can result in hypoxemia and hypercapnia, leading to symptoms such as shortness of breath, fatigue, and decreased exercise tolerance.
While self-care deficit, activity intolerance, and ineffective airway clearance are all potential complications associated with emphysema, impaired gas exchange is the priority due to its direct impact on the client's oxygenation and overall respiratory function.
Addressing impaired gas exchange and optimizing oxygenation is essential to support the client's respiratory health and prevent further complications. Management strategies for impaired gas exchange may include administering supplemental oxygen, implementing respiratory treatments to improve lung function, and providing education on breathing techniques and energy conservation.
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