High-Risk Newborns

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NICU guide

- High-Risk Neonates

A high-risk neonate is an infant who has a greater chance of illness or death due to life-threatening conditions before, during, or after birth, regardless of gestational age or birth weight.

Examples of High-Risk Neonates:

• Preterm infant
• Postterm infant
• Infant with high bilirubin levels
• Infant with respiratory distress
• Infant with sepsis
• Infant with necrotizing enterocolitis
• Infant born to a diabetic mother

Preterm and Low Birth Weight Infants:

• Preterm (Premature) Infant: A baby born before completing 37 weeks of gestation, regardless of birth weight. These infants make up the majority of high-risk neonates in neonatal intensive care units (NICUs).
• Low Birth Weight Infant (LBW): An infant weighing less than 2500 grams at birth due to prematurity or intrauterine growth restriction (IUGR).
• Very Low Birth Weight Infant (VLBW): An infant weighing between 1000 to 1500 grams.
• Extremely Low Birth Weight Infant (ELBW): An infant weighing less than 1000 grams at birth.

Causes of Preterm Birth:

The primary cause in most cases is unknown, but several factors contribute to preterm birth, including:

• Maternal age below 17 or above 35
• Low socioeconomic status, leading to inadequate prenatal care
• Chronic maternal diseases such as diabetes, heart disease, hypertension, and kidney disease
• Maternal malnutrition and anemia
• Maternal infections, such as urinary tract infections
• Multiple pregnancies (more than five) or closely spaced pregnancies
• Uterine abnormalities, such as cervical insufficiency or congenital anomalies (e.g., bicornuate uterus)
• Preeclampsia
• Antepartum hemorrhage
• Premature rupture of membranes
• Polyhydramnios (excess amniotic fluid)
• Placental abruption
• Family history of preterm birth
• Multiple gestation (twins, triplets, etc.)
• Severe cases of blood incompatibility, such as Rh incompatibility

Causes of Intrauterine Growth Restriction (IUGR):

Maternal Causes:

• Chronic maternal diseases (hypertension, heart diseases, renal failure)
• Malnutrition and anemia
• Preeclampsia
• Maternal smoking during pregnancy

- Blood Glucose Disorders in Neonates

Glucose is an essential energy source for newborns. During pregnancy, the fetus depends on the mother for glucose through the placenta. After birth, the infant must regulate blood glucose levels independently. Normal neonatal blood glucose levels range from 50 to 125 mg/dL.

Neonatal Hypoglycemia (Low Blood Glucose):

Neonatal hypoglycemia is defined as a blood glucose level below 45 mg/dL. It is a critical condition that can lead to serious complications, particularly affecting the brain.

Infants at Risk for Hypoglycemia:

• Infant of a diabetic mother
• Low birth weight (LBW) or small for gestational age (SGA) infant
• Large for gestational age (LGA) infant
• Infant with hypothermia
• Infant with respiratory distress
• Infant with birth asphyxia
• Infant with neonatal sepsis
• Infants whose mothers received corticosteroids or high-concentration IV glucose during labor

Symptoms of Hypoglycemia:

Hypoglycemia may be asymptomatic, making it particularly dangerous. Potential symptoms include:

• Lethargy
• Jitteriness
• Irritability
• Cyanosis
• Seizures
• Poor feeding or weak suck
• Irregular breathing
• Apneic episodes
• Bradycardia

Prevention:

Immediately after birth, neonates at risk of hypoglycemia should be fed either orally or via a feeding tube within the first hour. If oral feeding is not possible, 10% dextrose solution should be administered intravenously.

Blood Glucose Monitoring in the NICU:

Equipment Required:

• Blood glucose test strips
• Small lancets
• Alcohol swabs
• Gloves
• Sterile gauze
• Adhesive bandages

Procedure:

1. Wash hands thoroughly.
2. Warm the infant’s heel with a cotton pad for 5 minutes to increase blood flow.
3. Choose a puncture site on the outer edges of the heel, avoiding the center.
4. Clean the site with alcohol and allow it to dry.
5. Prepare the lancet and test strip.
6. Hold the heel firmly and prick the chosen site.
7. Wipe away the first drop of blood with sterile gauze and use the second drop for testing.
8. Apply gentle pressure to stop bleeding.
9. Read the glucose level as per the test strip instructions.
10. Dispose of used materials properly and wash hands.

Treatment of Neonatal Hypoglycemia:

• Immediately notify the physician.
• Send a blood sample to the lab for glucose measurement.
• If blood glucose is less than 30 mg/dL or symptoms are present, administer 2 mL/kg of 10% dextrose via IV over one minute, followed by continuous IV glucose infusion as per the doctor's orders.
• If glucose is between 30–45 mg/dL without symptoms, feed the infant via oral or IV glucose as necessary.
• Monitor blood glucose every 30–60 minutes until levels stabilize above 45 mg/dL consistently before stopping monitoring.

Neonatal Hyperglycemia (High Blood Glucose):

Defined as a blood glucose level above 125 mg/dL, leading to dehydration due to excessive urine output.

Causes:

• High-concentration IV glucose administration, especially in infants <1000g birth weight
• Administration of corticosteroids
• Neonatal sepsis
• Surgical procedures or painful interventions

Treatment:

• Monitor glucose levels every 30 minutes until stabilized.
• Adjust IV glucose infusion as per physician’s recommendations.

- Seizures

Neonatal seizures are serious neurological events caused by abnormal electrical activity in the brain. They appear as involuntary muscle contractions, which may affect one part of the body or the entire body. Sometimes, seizures may manifest as altered consciousness or autonomic dysfunction.

Types of Neonatal Seizures:

Causes of Neonatal Seizures:

Common Causes:

• Birth asphyxia
• Intracranial hemorrhage due to birth trauma (forceps/vacuum extraction)
• Meningitis
• Neonatal sepsis
• Hypoglycemia, hypocalcemia, or hypomagnesemia

Less Common Causes:

• Congenital brain anomalies
• Severe jaundice (kernicterus)
• Electrolyte imbalances (sodium disturbances)
• Metabolic disorders
• Neonatal tetanus (due to umbilical cord contamination)
• Maternal drug use during pregnancy

Symptoms of Neonatal Seizures:

• Persistent limb jerking (not stopping with restraint)
• Repetitive limb movements (cycling/swimming motions)
• Eye deviation
• Chewing or sucking movements
• Brief apnea with tachycardia

Required Laboratory and Diagnostic Investigations

Initial Laboratory Tests:

• Blood glucose level

• Serum calcium, sodium, and magnesium levels

• Arterial blood gases

• Complete blood count (CBC)

• Blood culture and cerebrospinal fluid (CSF) culture

Additional Investigations:

• Electroencephalogram (EEG)

• Cranial ultrasound

• Brain CT scan and MRI

• Metabolic screening

• TORCH screening (infectious diseases during pregnancy)

Nursing Assessment of the Case

1. Medical History
The following information must be obtained:

1. Gestational age (intrauterine age).
2. Family history of neurological disorders or consanguineous marriage.
3. History of intellectual disability in siblings or neonatal death.
4. Maternal infections during pregnancy, diabetes, or abnormal fetal movements during gestation.
5. Abnormal neonatal findings at birth, such as reduced activity.
6. Mode of delivery and use of instruments (e.g., forceps).
7. Neonatal resuscitation status at birth, such as Apgar score at 1 and 5 minutes.

2. Physical Examination of the Infant

1. Presence of congenital malformations or anomalies.
2. Bulging of the anterior fontanelle.
3. Level of consciousness and activity.
4. Muscle tone, presence of hypotonia or hypertonia.
5. Observation of seizures: involuntary movements of part or all of the body.
6. Hepatomegaly or splenomegaly.
7. Abnormal skin pigmentation.

Nursing Care During Seizures
When seizures occur, immediate action is required:

1. Ensure the airway is clear of obstructions.
2. Suction the mouth and airway between seizures, not during the episode.
3. Provide oxygen therapy.
4. Check blood glucose level; if unavailable, administer 10% glucose IV over 1 minute at a dose of 2 ml/kg according to body weight.
5. Call the physician immediately.
6. Administer anticonvulsant medications such as phenobarbitone as prescribed.
7. Document seizure activity in the child’s medical record, including type, duration, heart rate, respiratory rate, medications administered, and nursing interventions performed.

Follow-up Care

8. Monitor vital signs (pulse, respiration, blood pressure, temperature).
9. Maintain normal body temperature.
10. Assess tissue perfusion by capillary refill time.
11. Monitor blood glucose levels.
12. Ensure IV cannula remains patent and functional.
13. Keep emergency equipment at bedside (oxygen source, Ambu-bag, laryngoscope, endotracheal tubes, suction machine, emergency drugs).

- Seizure-like Conditions in Preterm Infants

Seizure-like episodes in preterm infants (born before term) may be concerning and require careful evaluation. Possible causes include:

1. Hypoxia – oxygen deprivation during or after birth may cause brain injury leading to seizures.
2. Hypoglycemia – immature glucose regulation can lead to low blood sugar and seizures.
3. Infections – meningitis or encephalitis may precipitate seizures.
4. Hypocalcemia – low serum calcium may trigger seizures.
5. Intraventricular hemorrhage – brain bleeding, especially in preterm infants.
6. Metabolic disturbances – electrolyte imbalances (sodium, calcium, magnesium).
7. Structural brain abnormalities – congenital or acquired causes.

In cases of seizures or abnormal movements in preterm infants, urgent medical evaluation is essential, as prompt treatment may be required.

Nursing Care for Seizure-like Conditions in Preterm Infants

1. Monitor Vital Signs:
• Respiration: observe rate, color (cyanosis), and provide oxygen if needed.
• Heart rate: monitor and record regularly.
• Temperature: maintain within normal range to avoid seizure triggers.
2. Monitor Neurological Activity:
• Observe for abnormal movements (tremors, partial seizures).
• Assess consciousness and responsiveness.
• Record seizure episodes (time, duration, and pattern).
3. Medication Administration:
• Administer anticonvulsants as prescribed.
• Monitor side effects and adjust doses according to response.
4. Nutrition and Fluids:
• Regular monitoring of blood glucose.
• Provide appropriate feeding (breastfeeding or nasogastric tube).
5. Comfort and Environment:
• Maintain a quiet, stable environment (reduce light and noise).
• Ensure a comfortable position minimizing stress on brain and body.
6. Family Education:
• Inform parents about the infant’s condition and importance of monitoring.
• Teach caregivers how to manage seizure episodes at home.
7. Emergency Preparedness:
• Ensure availability of resuscitation equipment (CPR devices, emergency drugs, ventilator support).
8. Documentation:
• Record all clinical observations, seizure details, medications, nursing care, and infant response.

These steps ensure optimal nursing care for preterm infants with seizure-like conditions, contributing to better outcomes and reducing potential complications.