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","C","D"]
Explanation
A) Incorrect- Standard precautions are used for all clients to prevent the spread of infections.
However, in the case of MRSA, contact precautions are needed due to the risk of direct transmission through physical contact.
B) Correct- Monitoring the white blood cell count is important to assess for signs of infection, as an elevated count might indicate an ongoing inflammatory response.
C) Correct- Foul-smelling drainage from an incision with suspected MRSA indicates a potential infection. Contact precautions are appropriate for MRSA, which include wearing gloves and gowns when entering the client's room to prevent the spread of the bacteria.
D) Correct- Sending wound drainage for culture and sensitivity helps identify the specific microorganisms causing the infection and guides appropriate antibiotic treatment.
E) Incorrect- A low-bacteria diet is not relevant to the situation. MRSA is caused by a bacterium, not by dietary factors. The focus should be on infection control measures and appropriate medical interventions.
Correct Answer is ["1000"]
Explanation
rate (mL/h) = volume (mL) / time (h).
In this case, the volume is 500 mL and the time is 0.5 h (30 minutes).
Plugging these values into the formula, we get: rate (mL/h) = 500 mL / 0.5 h = 1000 mL/h. Therefore, the nurse should set the infusion pump to 1000 mL/hour.
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