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The nurse attaches a pulse oximeter to a client’s finger and obtains an oxygen saturation reading of 91%. Which assessment finding most likely contributes to this reading?

A.

Capillary refill time is 2 seconds.

B.

2+ edema of fingers and hands.

C.

Radial pulse volume is 3+.

D.

Blood pressure is 142/88 mm Hg.

Answer and Explanation

The Correct Answer is B

Choice A rationale

 

Capillary refill time is 2 seconds. A capillary refill time of 2 seconds is within normal limits and is unlikely to affect the accuracy of the pulse oximetry reading.

 

Choice B rationale

 

2+ edema of fingers and hands. Edema can interfere with the accuracy of pulse oximetry readings by affecting the perfusion of the area where the sensor is placed. This can lead to falsely low oxygen saturation readings.

 

Choice C rationale

 

Radial pulse volume is 3+. A strong radial pulse indicates good peripheral perfusion, which should not negatively impact the accuracy of the pulse oximetry reading.

 

Choice D rationale

 

Blood pressure is 142/88 mm Hg. While elevated blood pressure can have various effects on the body, it is not likely to directly affect the accuracy of a pulse oximetry reading.


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Correct Answer is D

Explanation

Choice A rationale

Lubricating the thermometer before inserting it into the ear is not a standard practice for using a tympanic thermometer. Tympanic thermometers are designed to be used without lubrication, and using lubrication could interfere with the accuracy of the reading.

Choice B rationale

Holding the thermometer in place for a full three minutes is unnecessary for tympanic thermometers. These thermometers provide quick readings, usually within a few seconds, and holding it for longer does not improve accuracy.

Choice C rationale

Pulling the client’s auricle down and back is the correct technique for infants and young children. For adults, the correct technique is to pull the auricle up and back to straighten the ear canal for an accurate reading.

Choice D rationale

Using positive reinforcement to affirm that the procedure is being performed correctly is the appropriate action. The UAP is using the correct technique by pulling the client’s auricle up and back, which is the proper method for adults.

Correct Answer is B

Explanation

Choice A rationale

Whether the popsicles contain pulp or fruit is not relevant to the clear liquid diet, which focuses on the clarity and digestibility of the liquids.

Choice B rationale

The color and flavor of gelatin used are important because certain colors, especially red or purple, can interfere with medical tests and are often avoided in clear liquid diets.

Choice C rationale

If the popsicles are completely frozen is not relevant to the dietary restrictions. The focus should be on the ingredients and their suitability for a clear liquid diet.

Choice D rationale

The number of popsicles available does not impact their suitability for the child’s diet. The nurse should focus on the content and appropriateness of the popsicles.

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