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?
Capillary refill time is 2 seconds.
2+ edema of fingers and hands.
Radial pulse volume is 3+.
Blood pressure is 142/88 mm Hg.
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 A
Explanation
Choice A rationale
Injecting in the abdominal area at least 2 inches (5.1 cm) from the umbilicus is the correct technique for subcutaneous heparin injections. This reduces the risk of injury to blood vessels and nerves and ensures consistent absorption of the medication.
Choice B rationale
Rotating injections between the abdomen and gluteal areas is not recommended for low molecular weight heparin (LMWH) injections. The abdomen is the preferred site for consistent absorption.
Choice C rationale
Massaging the injection site to increase absorption is not recommended for LMWH injections. Massaging can cause bruising and affect the absorption of the medication.
Choice D rationale
Expelling the air in the prefilled syringe prior to injection is not recommended for LMWH injections. The air bubble helps ensure the entire dose is administered and prevents medication from leaking out.
Correct Answer is C
Explanation
Choice A rationale
Asking the client if they understand after each instruction may not be effective if the client is not comfortable expressing confusion or misunderstanding. It does not allow for direct observation of the client’s ability to perform the necessary tasks.
Choice B rationale
Having an interpreter repeat the wound care instructions may be helpful, but it still does not allow for direct observation of the client’s ability to perform the necessary tasks.
Choice C rationale
Having the client demonstrate prescribed wound care is the best way to evaluate the client’s understanding of self-care at home. This allows the nurse to directly observe the client’s ability to perform the necessary tasks and provide feedback and clarification as needed.
Choice D rationale
Providing written instructions in the client’s native language may be helpful, but it does not allow the nurse to directly evaluate the client’s understanding.