Fetal blood sampling is contraindicated in which of the following conditions

NHM UP Staff Nurse-2021 Shift-1st

Obstetrics & Gynaecology

Medium

Appeared in: NHM UP Staff Nurse-2021 Shift-1st

Explanation

Fetal blood sampling is an invasive procedure that involves making a small cut on the fetal scalp to obtain a blood sample.
This procedure breaks the fetal skin barrier, creating a direct portal of entry for maternal blood.
In a woman who is HIV-positive, this significantly increases the risk of vertical transmission (mother-to-child transmission) of the virus.
Therefore, to prevent iatrogenic infection of the fetus, fetal blood sampling is contraindicated in HIV-positive mothers.
The same contraindication applies to other maternal blood-borne infections like Hepatitis B, Hepatitis C, and active Herpes Simplex Virus.

Option B: Thick meconium-stained liquor is a sign of fetal distress, but it is not an absolute contraindication for fetal blood sampling. The procedure may still be necessary to confirm fetal acidosis if EFM tracings are abnormal.
Option C: This is the primary indication for performing fetal blood sampling, not a contraindication. Abnormal EFM tracings raise suspicion of fetal hypoxia, and blood sampling is done to confirm or rule out acidosis.
Option D: This option is incorrect because 'Atypical and abnormal tracing on Electronic Fetal Monitoring' is an indication for the procedure, not a contraindication.

Clinical Relevance

Nursing practice connection: Knowing Contraindications for Fetal Blood Sampling helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A key nursing responsibility is to ensure patient safety by verifying that indications are met and contraindications are absent before any invasive procedure.
In obstetrics, preventing vertical transmission of infections is a critical patient safety goal. Nurses must be aware of maternal infection status (HIV, Hepatitis, HSV) and advocate for avoiding procedures that could harm the fetus.
What if? If the mother had active genital herpes lesions instead of being HIV positive, fetal scalp sampling would also be contraindicated for the same reason: risk of transmitting the virus to the fetus through the broken skin.

How to Approach the Question

First, understand the question is asking for a contraindication, which is a reason to not perform a procedure.
Analyze the procedure: Fetal blood sampling is invasive and involves breaking the fetal skin.
Evaluate Option A (HIV positive women): Consider the risk of transmitting a blood-borne virus from mother to fetus if the fetal skin is broken. This is a major safety risk.
Evaluate Option C (Abnormal EFM): Recognize that an abnormal fetal heart tracing is a sign of potential distress. This is the primary reason to perform a test like fetal blood sampling to get more information. Therefore, it's an indication, not a contraindication.
Since Option C is an indication, Option D (All the above) must be incorrect.
Evaluate Option B (Thick meconium): This is a sign of distress, similar to an abnormal EFM. While it adds to the clinical picture of concern, it doesn't inherently prevent the sampling procedure itself. It's not an absolute contraindication.

Concept Tested & Keywords

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E6 Obstetrics Williams p. 55-74

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 50-58