Hypoxic-ischemic encephalopathy, or HIE, is brain damage caused by oxygen and blood flow deprivation around the time of birth. It affects an estimated 2 to 3 per 1,000 full-term births in the United States and is one of the most serious injuries a newborn can suffer. The consequences range from mild learning difficulties to severe lifelong disability, depending on how long the deprivation lasted and how quickly it was recognized.
Families facing an HIE diagnosis often don’t know whether the injury was preventable. The birth injury lawyers in Dallas and other cities can help families investigate exactly those questions, examining hospital records, fetal monitoring strips, and the timing of medical decisions to determine what went wrong.
How HIE Happens During Labor and Delivery
The fetal brain depends on a continuous supply of oxygen-rich blood. When that supply is interrupted, cells begin to die. Oxygen deprivation during labor can result from placental abruption, umbilical cord prolapse or compression, uterine rupture, a prolonged delivery, or a failure to perform a timely cesarean section when fetal distress is evident from monitoring.
Many of these events are identifiable before permanent damage occurs. Electronic fetal monitoring generates a continuous record of how the baby is tolerating labor. Abnormal patterns—called Category II or Category III tracings—require prompt response. Delays in that response are among the most common factors in preventable HIE cases.
The Critical Treatment Window
When HIE is suspected after birth, there is a narrow window to limit the damage. Therapeutic hypothermia—cooling the baby’s core temperature to around 33.5°C for 72 hours—is the standard of care for moderate-to-severe HIE and has been shown in multiple trials to reduce death and disability. Experts say cooling therapy must begin within six hours of birth to be effective.
If a hospital fails to recognize HIE or doesn’t initiate cooling within that window, that failure can itself constitute medical negligence—independent of what caused the oxygen deprivation. Parents should ask directly whether cooling was offered, when it started, and whether the neonatal team documented their reasoning.
Early Signs That Something May Have Gone Wrong
Newborns with HIE often show clinical signs in the hours after birth. Not every symptom appears, and some may be subtle. Signs that warrant immediate concern include:
• Seizures or abnormal repetitive movements within the first 24 to 48 hours
• Low Apgar scores at 5 or 10 minutes that don’t recover toward normal
• Difficulty breathing or the need for resuscitation in the delivery room
• Abnormal tone, either floppy (hypotonia) or rigid limbs
• Poor feeding, an absent suck reflex, or difficulty swallowing
• Altered consciousness, unusual lethargy or an inability to be roused
If your baby showed several of these signs and the care team didn’t discuss HIE or initiate cooling, that silence deserves a closer look.
What the Medical Records Will Show
The most critical documents in any HIE case are the fetal monitoring strips and delivery room notes. Those strips show what the baby’s heart rate was doing throughout labor — and whether Category III patterns that should have triggered emergency action were present long before delivery.
The American College of Obstetricians and Gynecologists has published detailed guidance on interpreting those patterns. When the records show a Category III tracing was present and no escalation occurred, that gap between what happened and what should have happened becomes the foundation of a negligence claim. Families are entitled to request those records in full.
Getting the Records Reviewed
Parents who suspect their child’s HIE was preventable don’t need to make that determination themselves—they need to preserve the evidence. Request the complete medical records from the hospital: fetal monitoring strips, delivery notes, NICU records, and any imaging such as an MRI or head ultrasound performed in the first days after birth.
A birth injury attorney can then have those records reviewed by medical experts—typically a maternal-fetal medicine specialist and a neonatologist—who assess whether the care provided met the applicable standard. That review takes time, which is why families are urged to seek legal advice promptly. The medical record tells a story that grows harder to reconstruct the longer families wait.
