When a client reports using cocaine during her current pregnancy, which laboratory study should a nurse anticipate?

The correct answer is choice A and it indicates fetal distress because it is a sign oflate deceleration.Late decelerations are due touteroplacental insufficiencyas the result of decreased blood flow and oxygen to the fetus during the uterine contractions.This causeshypoxemiaand can lead to fetal acidosis and neurological damage.

Choice B is wrong because it indicates anormal variabilityin the fetal heart rate, which reflects a healthy autonomic nervous system.A normal fetal heart rate is 120-160 beats per minute.

Choice C is wrong because it indicates anearly accelerationin the fetal heart rate, which is a benign finding that may occur with fetal movement or stimulation.

Choice D is wrong because it indicates anearly decelerationin the fetal heart rate, which is a normal response to fetal head compression during contractions.

It does not indicate fetal distress.

Normal ranges for fetal heart rate patterns are:

• Baseline: 120-160 beats per minute

• Variability: 6-25 beats per minute

• Accelerations: at least 15 beats per minute above baseline for at least 15 seconds

• Decelerations: none or early (mirror contractions)

This is because the first priority for a pregnant woman with acute abdominal pain is to assess the fetal well-being and rule out any obstetric complications such as placental abruption, uterine rupture, or preterm labor.Fetal heart tones can indicate the presence and viability of the fetus and alert the nurse to any signs of fetal distress or hypoxia.

Choice A: Obtain a full history is wrong because it is not the most urgent action.

A full history can provide valuable information about the possible causes of abdominal pain, but it should not delay the assessment of fetal status and maternal vital signs.

Choice B: Examine the cervix for dilation is wrong because it can be harmful in some cases.A digital cervical examination should be avoided until placenta previa is ruled out by ultrasound, as it can cause bleeding and worsen the condition.

Moreover, cervical dilation alone does not indicate the cause or severity of abdominal pain.

Choice D: Palpate for uterine contraction frequency is wrong because it is not the most reliable method to assess labor.Uterine contractions can be measured by external tocodynamometry or internal intrauterine pressure catheter, which can provide more accurate and objective data than manual palpation.

Furthermore, uterine contractions do not necessarily indicate labor, as they can also be caused by other conditions such as dehydration, infection, or irritable uterus.