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 D
Explanation
A.While pain management is important, it is not the most critical intervention compared to monitoring for bleeding, which can be life-threatening.
B.Teaching the client how to use incentive spirometry is important for improving lung function and preventing complications like atelectasis. However, in the context of a pulmonary embolism (PE), the immediate priority is to monitor for signs of increased bleeding due to the anticoagulant or thrombolytic therapy often used to treat PE. This is crucial to prevent potentially life-threatening complications.
C.Confusion and restlessness could indicate hypoxia, which is important to monitor in a PE patient. However, the immediate risk of bleeding due to anticoagulation therapy takes precedence.
D.Patients with a pulmonary embolism are typically treated with thrombolytic or anticoagulant therapy to prevent further clot formation and to help dissolve the existing clot. Anticoagulants significantly increase the risk of bleeding, making it crucial to monitor for signs of increased bleeding as a priority in the plan of care.
Correct Answer is D
Explanation
A) Incorrect - Skin redness might indicate irritation, but the initial focus should be on the client's sensation.
B) Incorrect - Decreasing the strength of the electrical signals might be premature if the sensation is normal.
C) Incorrect - The amount of gel coating on the electrodes might not be the primary issue if the client is feeling a tingling sensation.
D) Correct- A tingling sensation is normal and expected when using a TENS unit, and it does not indicate any harm or damage to the skin or nerves. However, the sensation should not be painful or unpleasant for the client, and the nurse should adjust the intensity of the electrical signals accordingly.
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