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 B
Explanation
In this situation, the client has a fingerstick glucose level of 35 mg/dL (1.94 mmol/L) and is alert but diaphoretic. The charge nurse should take the following action:
Give the client a glass of orange juice.
A glucose level of 35 mg/dL (1.94 mmol/L) is considered significantly low (hypoglycemia), and the client's symptoms of diaphoresis indicate that the low glucose level is likely causing the symptoms. Providing the client with a glass of orange juice or another source of fast-acting carbohydrate is appropriate to quickly raise the blood sugar level and alleviate the symptoms of hypoglycemia.
Collecting a blood sample for hemoglobin A1c (HbA1c) is not necessary in this acute situation. HbA1c reflects the average blood glucose level over the past 2-3 months and is used to assess long-term glycemic control in clients with diabetes. It does not provide immediate information or guide immediate interventions for acute hypoglycemia.
Notifying the healthcare provider is not the first action to take in this situation. The client's low glucose level can be promptly addressed by administering a source of fast-acting carbohydrate, such as orange juice. If the client's symptoms persist or worsen despite appropriate intervention, or if there are other concerning factors, then notifying the healthcare provider would be appropriate.
Assessing the client for polyuria (excessive urination) and polyphagia (excessive hunger) is important in the overall management of diabetes, but it is not the immediate action to take in this acute situation of hypoglycemia. The priority at this time is to address the low blood sugar level and relieve the client's symptoms.
Correct Answer is A
Explanation
Wearing protective goggles is important during suctioning to protect the nurse's eyes from potential splashes or aerosolized secretions. Suctioning can generate forceful coughing, gagging, or sneezing in the client, which may cause secretions or mucus to be expelled forcefully and potentially come into contact with the nurse's eyes. Wearing goggles helps prevent eye exposure and reduces the risk of infection transmission.
Applying a water-soluble lubricant to the catheter may be necessary to facilitate the insertion of the suction catheter into the tracheostomy tube, but it is not the most crucial action to include when performing suctioning.
Instilling normal saline before suctioning is not recommended as it can cause potential harm to the client's airway. Instilling saline can lead to bronchospasm, mucosal damage, and other complications. Suctioning should only be performed when necessary to remove secretions and maintain a patent airway.
Instructing the client to cough as the suction tip is removed is not necessary or recommended. Coughing during the suctioning process can be uncontrolled and may increase the risk of trauma to the airway. The nurse should instead provide supportive care and reassurance to the client throughout the procedure.
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