For a patient in active labor, the nurse-midwife plans to use an internal electronic fetal monitoring (EFM) device. What must occur before the internal EFM can be applied?

1. A

   The cervix must be dilated fully

2. B

   The patient must receive anesthesia

3. C

   The membranes must rupture

4. D

   The fetus must be at 0 station

Appeared in: UPRVUNL - 2021

Explanation

• Internal fetal monitoring requires direct access to the fetus and the uterine cavity.
• The fetal scalp electrode (FSE) is applied directly to the fetal scalp, and the intrauterine pressure catheter (IUPC) is placed inside the uterus.
• This is only possible if the amniotic membranes, which enclose the fetus in amniotic fluid, have ruptured.
• Rupture of membranes can be spontaneous (SROM) or artificial (AROM) via an amniotomy.
• Without ruptured membranes, the monitoring devices cannot be placed correctly or safely.

Why Other Options Were Wrong

• Option A: Full cervical dilation (10 cm) marks the end of the first stage of labor. Internal monitoring is often needed before this point to assess fetal well-being during active labor.
• Option B: The placement of an internal fetal monitor is a minimally invasive procedure performed during a vaginal exam and does not require anesthesia.
• Option D: While the fetal presenting part must be low enough in the pelvis to be accessible, it is not a strict requirement for it to be at 0 station (the level of the ischial spines).

Related Visual

Clinical Relevance

• Nursing practice connection: Safe nursing care depends on performing Prerequisites for internal electronic fetal monitoring (EFM) in the correct sequence, documenting the action clearly, and monitoring for the expected response.
• Nurses play a crucial role in assisting with the placement of internal monitors, ensuring sterile technique, and documenting the procedure.
• After placement, the nurse is responsible for monitoring the FHR and contraction patterns, as well as assessing for potential complications such as infection or injury at the electrode site.
• A key nursing responsibility is to explain the procedure to the patient, provide support, and ensure her comfort.

How to Approach the Question

• First, identify the core subject of the question, which is 'internal electronic fetal monitoring (EFM)'.
• Visualize the procedure. Internal monitoring means placing a device inside the uterus to directly contact the fetus.
• Consider the anatomical barriers. The fetus is enclosed within the amniotic sac (membranes). To reach the fetus, this sac must be opened.
• Evaluate each option based on this anatomical requirement:
• Does the cervix need to be fully open? No, just enough to pass the device.
• Is anesthesia needed for a vaginal exam procedure? No.

Concept Tested & Keywords

• Concept Tested: Prerequisites for internal electronic fetal monitoring (EFM)
• Stem keywords: internal electronic fetal monitoring, EFM, active labor, nurse-midwife
• Lead-in keywords: What must occur before

Question ID

QhTVaQ1GCf94gVYHjlOBNr

Copy ID

Reference Book

E6 Obstetrics Williams p. 24-42