Fetal metabolic acidemia is a dangerous buildup of acid in a baby’s blood during labor and delivery. It usually happens when the baby lacks oxygen for too long. Doctors test for it using blood from the umbilical cord right after birth.
When cord blood tests show a pH below 7.0 along with a base deficit over 12 mmol/L, the baby has significant metabolic acidemia. This warning sign shows that the baby faced severe stress, which can lead to brain injury, organ damage, or long-term disabilities.
This condition is different from respiratory acidemia, which stems from a temporary buildup of carbon dioxide and usually clears up quickly without lasting harm. Metabolic acidemia means the baby went without oxygen for so long that their cells began creating lactic acid. This metabolic form is far more likely to cause permanent neurological damage.
How Does Fetal Metabolic Acidemia Develop?
Several delivery complications can cut off the flow of oxygen-rich blood to the baby, including:
- Umbilical cord compression or prolapse
- Placental abruption
- Uterine rupture
- Excessive contractions, often from Pitocin overstimulation
- A long second stage of labor without proper fetal monitoring
- A tight umbilical cord wrapped around the baby’s neck
When oxygen drops and continues, the body’s reserves run out, acid builds up, and begins to cause organ damage.
What Does Cord Blood Gas Analysis Show?
Doctors test blood from the umbilical artery right after birth to measure three key levels:
- pH: Measures overall acid levels. A normal reading is between 7.25 and 7.35. A result under 7.0 points to severe acidemia.
- Base deficit: Shows metabolic acid buildup. A base deficit over 12 mmol/L signals significant metabolic acidosis.
- pCO2: Measures respiratory acid. High pCO2 with a normal base deficit suggests a respiratory issue rather than a metabolic one.
A low pH combined with a high base deficit confirms metabolic acidemia, proving that the baby suffered prolonged oxygen deprivation during delivery.
Fetal Metabolic Acidemia and Medical Malpractice
Cord blood gas results can offer key evidence in a birth injury claim. They can prove that oxygen loss during labor was severe enough to cause brain damage. On the other hand, normal results might show that an injury happened before labor or was caused by something else entirely.
If a delivery was difficult and the medical team failed to run a cord gas test, the lack of testing itself can be evidence of negligence.
If heart rate monitors showed signs of distress and the medical team failed to act, the condition may have been preventable. Common errors include delaying a C-section, ignoring warning signs on heart tracings, or giving Pitocin despite clear signs of trouble.
If your child was diagnosed with metabolic acidemia at birth and later developed other medical conditions, contact an experienced Houston birth injury lawyer for help understanding your rights. Your attorney can work with medical experts to determine if the medical team failed to abide by accepted medical standards and caused a preventable birth injury.
Hampton & King offers free consultations to help you identify your legal options.