which of the following can cause a low pulse oximetry reading
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PN ATI Capstone Proctored Comprehensive Assessment 2020 A with NGN

1. What can cause a low pulse oximetry reading?

Correct answer: C

Rationale: Inadequate peripheral circulation can cause a low pulse oximetry reading by limiting blood flow to the area being measured, leading to inaccurate oxygen saturation readings. Hyperthermia (choice A) is an elevated body temperature and does not directly affect pulse oximetry readings. An increased hemoglobin level (choice B) would actually lead to higher oxygen-carrying capacity in the blood, resulting in normal or increased pulse oximetry readings. Low altitudes (choice D) typically do not cause low pulse oximetry readings unless there are other underlying conditions affecting oxygen levels.

2. A nurse is caring for a client who is receiving oxytocin to augment labor. The client has an intrauterine pressure catheter and an internal fetal scalp electrode for monitoring. Which of the following is an indication that the nurse should discontinue the infusion?

Correct answer: B

Rationale: A contraction duration of 100 seconds indicates potential uterine hyperstimulation, which can lead to fetal distress and decreased uterine perfusion. Prolonged contractions may reduce oxygen supply to the fetus, putting it at risk. Discontinuing the oxytocin infusion is crucial to prevent adverse effects on both the mother and the fetus. The other options do not raise immediate concerns that would necessitate discontinuing the oxytocin infusion. Contraction frequency every 3 minutes is within a normal range. Fetal heart rate with moderate variability and a rate of 118/min are both reassuring signs of fetal well-being.

3. A client gave birth 4 hours ago and is experiencing excessive vaginal bleeding. Which of the following actions should the nurse plan to take first?

Correct answer: C

Rationale: The correct answer is to massage the client's fundus first. Uterine atony is a common cause of postpartum hemorrhage, and massaging the fundus can help stimulate uterine contractions, which will assist in reducing bleeding. Elevating the client's legs to a 30° angle (Choice A) is not the priority in this situation as fundal massage takes precedence. Inserting an indwelling urinary catheter (Choice B) may be necessary but should not take precedence over managing the postpartum hemorrhage. Initiating an infusion of oxytocin (Choice D) is a valid intervention to address uterine atony, but massaging the fundus should come first to promote immediate contraction and control bleeding.

4. A nurse is preparing to administer a dose of enoxaparin. Which of the following actions should the nurse take?

Correct answer: C

Rationale: The correct answer is to give enoxaparin in the abdomen. Enoxaparin is usually administered subcutaneously in the abdomen to avoid muscle irritation. Choice A is incorrect because enoxaparin should not be administered intramuscularly. Choice B is incorrect as monitoring APTT levels is not directly related to administering enoxaparin. Choice D is incorrect as enoxaparin should be administered slowly to prevent bruising or bleeding at the injection site.

5. A client had a pituitary tumor removed. Which of the following findings requires further assessment?

Correct answer: D

Rationale: The correct answer is D. Increased urinary output greater than fluid intake can indicate diabetes insipidus, a common complication after pituitary surgery. Diabetes insipidus is characterized by the excretion of a large volume of dilute urine, leading to dehydration and electrolyte imbalances. This finding requires immediate assessment and intervention. Choice A, a Glasgow scale score of 15, indicates normal neurological functioning. Choice B, blood drainage on dressing measuring 3 cm, may require monitoring but is not a priority over the potential complication of diabetes insipidus. Choice C, a report of dry mouth, is a common complaint postoperatively and can be managed with oral care measures.

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