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
The correct answer is choice D. Demonstrate to the PN how to position the client more effectively for the procedure.
Choice A rationale:
Arranging for unlicensed assistive personnel to assist the PN during the procedure does not address the incorrect positioning of the client. The priority is to ensure the client is positioned correctly for the sigmoidoscopy, which is typically on the left side with knees drawn toward the chest.
Choice B rationale:
Acknowledging that the PN has positioned the client safely and correctly is not appropriate because the flat prone position is incorrect for a sigmoidoscopy. The correct position is on the left side with knees drawn toward the chest.
Choice C rationale:
Assuming care of the client and assigning the PN to the care of a different client does not address the educational opportunity. It is important to demonstrate the correct positioning to the PN to ensure proper care in future procedures.
Choice D rationale:
Demonstrating to the PN how to position the client more effectively for the procedure is the correct action. This ensures the client is in the proper position for the sigmoidoscopy and provides an educational opportunity for the PN.
Correct Answer is A
Explanation
A) Correct- With a significantly low platelet count, the risk of bleeding is elevated. Assessing urine and stool for occult (hidden) blood is important to detect any signs of internal bleeding that may not be immediately apparent. A low platelet count increases the risk of spontaneous bleeding, which can be life-threatening if undetected.
B) Incorrect- This choice is related to neutropenia, not thrombocytopenia. Neutropenia, or low neutrophil count, increases the risk of infection, which is why monitoring temperature frequently is important.
C) Incorrect- Monitoring for signs of activity intolerance is not directly related to the low platelet count. The primary concern with thrombocytopenia is the risk of bleeding, not generalized activity intolerance.
D) Incorrect- Requiring visitors to wear respiratory masks is not relevant to the client's current condition of low platelet count. This action is related to infection control and protection from respiratory infections.
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