A nurse is planning care immediately following birth for a newborn who has a myelomeningocele that is leaking cerebrospinal fluid. Which of the following actions should the nurse include in the plan of care?

A nonstress test (NST) is a test in pregnancy that measures fetal heart rate in response to movement and contractions²³. A normal nonstress test will show a baseline fetal heart rate between 110 and 160 beats per minute with moderate variability (5- to 25-interbeat variability) and 2 qualifying accelerations in 20 minutes with no decelerations³⁴. An acceleration is defined as an increase in the fetal heart rate of at least 15 beats per minute above the baseline for at least 15 seconds²³⁴.
A nonstress test can be affected by uterine contractions, which can cause fetal heart rate decelerations or reduced variability²³. Uterine contractions can also indicate preterm labor or placental abruption, which are serious complications that require intervention². Therefore, if the nurse observes three or more uterine contractions within a 20-minute period during a nonstress test, they should intervene by notifying the provider, assessing the patient for signs of labor or bleeding, and preparing for further evaluation or treatment²⁵.

The other options are not correct because they do not require intervention by the nurse:
a) One acceleration of the FHR within a 20-min period is not enough to meet the criteria for a reactive nonstress test, but it does not indicate fetal distress or compromise. The nurse should continue monitoring the fetal heart rate for another 20 minutes or until two accelerations are observed²³⁴.
b) Uterine contractions lasting 20 to 30 seconds each are normal and expected during pregnancy, especially in the third trimester. They are called Braxton Hicks contractions and they help prepare the uterus for labor. They are usually painless and irregular, and do not cause cervical changes. They do not require intervention by the nurse unless they become frequent, intense, or painful².
d) An FHR that peaks 20 beats above the baseline is considered an acceleration and is a sign of fetal well- being. It does not require intervention by the nurse unless it is associated with decelerations or reduced variability²³⁴.

Magnesium sulfate is a medication that is used to prevent seizures in women with preeclampsia, a condition that causes high blood pressure and organ damage during pregnancy. It is given intravenously (through a vein) and can also help lower blood pressure and relax the uterus¹.

Magnesium sulfate can cause various side effects and complications, such as
- Nausea, vomiting, or diarrhea
- Headache, drowsiness, or confusion
- Flushing, sweating, or feeling hot
- Weakness, muscle twitching, or paralysis
- Low blood pressure or slow heart rate
- Difficulty breathing or respiratory depression
- Allergic reaction or anaphylaxis
One of the serious complications of magnesium sulfate is magnesium toxicity, which occurs when the level of magnesium in the blood becomes too high. Magnesium toxicity can affect the nervous system, the muscles, the heart, and the lungs. It can cause severe symptoms, such as:
- Loss of reflexes
- Slurred speech or blurred vision
- Chest pain or cardiac arrest
- Coma or death
Magnesium toxicity can be caused by several factors, such as:
- Overdose of magnesium sulfate
- Impaired kidney function or renal failure
- Dehydration or fluid loss
- Interaction with other medications, such as calcium channel blockers or neuromuscular blockers
One of the signs of magnesium toxicity is decreased urine output. Urine output is a measure of how much urine the kidneys produce and excrete. It reflects the kidney function and hydration status. Normal urine output for adults is about 0.5 to 1 mL/kg/hour. For a 70 kg adult, this would be about 35 to 70 mL/hour².
Decreased urine output can indicate that the kidneys are not working properly and are unable to filter and remove excess magnesium from the blood. This can lead to a buildup of magnesium in the blood and cause magnesium toxicity. Decreased urine output can also indicate that the body is dehydrated and has low blood volume. This can reduce the blood flow to the kidneys and impair their function².
Therefore, the nurse should recognize urine output 20 mL/hr. as an adverse reaction to magnesium sulfate and report it to the provider immediately. The nurse should also monitor the client's vital signs, reflexes, respiratory status, and magnesium level closely and be prepared to administer calcium gluconate as an antidote if needed¹²³.

The other options are not manifestations that the nurse should recognize as adverse reactions to
magnesium sulfate:
- a) Hypertension is not an adverse reaction to magnesium sulfate, but a symptom of preeclampsia. Magnesium sulfate can help lower blood pressure in women with preeclampsia by relaxing the blood vessels and reducing vascular resistance¹³.

- c) Hyperglycemia is not an adverse reaction to magnesium sulfate, but a condition that causes high blood sugar levels. It can be caused by diabetes mellitus, pregnancy-induced diabetes (gestational diabetes), infection, stress, or certain medications. Magnesium sulfate does not affect blood sugar levels directly.
- d) Respiratory rate 16/min is not an adverse reaction to magnesium sulfate, but a normal finding for
respiratory rate in adults. The normal range for respiratory rate in adults is 12 to 20 breaths per minute. The respiratory rate may vary depending on age, activity level, health status, and environmental factors.