OB 11

Key Textbook References and Core Learning Objectives

• Primary learning objectives for high-risk neonatal care:

  • Identify clinical signs of and interventions for newborns with respiratory distress syndrome (RDS).

  • Review causes and interventions for newborns experiencing jaundice.

  • Identify symptoms exhibited in newborns of substance-abusing mothers and detail specific interventions for those newborns.

• Key textbook tables and boxes for review:

  • Box titled "Factors that place the postpartum patient and the newborn at risk".

  • Table titled "Medications for the mother and the newborn at risk".

  • Table titled "Maternal and fetal or neonatal effects of commonly abused substances".

Respiratory Distress Syndrome (RDS)

• Definition and significance:

  • Respiratory Distress Syndrome (RDS) is a severe lung disorder.

  • Represents the major cause of morbidity and mortality during the neonatal period.

• Epidemiological and demographic factors:

  • Occurs more frequently in male infants (boys).

  • Occurs more frequently in infants delivered via Cesarean section (C-section).

• Predisposing factors:

  • Maternal diabetes.

  • Asphyxia.

  • Maternal hemorrhage.

  • Shock.

  • Insufficient surfactant production.

• Pathophysiology:

  • Alveoli collapse at the end of expiration due to adequate surfactant deficiency.

  • Alveolar collapse causes progressive hypoxia, atelectasis, and respiratory acidosis.

Clinical Manifestations and Diagnostic Evaluation of RDS

• Recognized signs of respiratory distress:

  • Nasal flaring: Outward movement of the nostrils during respiration.

  • Expiratory grunting: Noisy exhalation that may sound like a small squeak.

  • Retractions: Inward movement of tissue over the chest wall.

  • Apneic spells: Periods of absent breathing lasting greater than $10\,\text{seconds}$.

  • Tachypnea: Abnormally rapid breathing rate up to $80$ to $120\,\text{breaths per minute}$.

  • Dyspnea: Difficult or labored breathing.

  • Low body temperature: Hypothermia secondary to distress and instability.

• Diagnostic findings:

  • Diagnosis relies on clinical manifestations and radiographic findings.

  • Blood gas analysis: Evaluates the presence and severity of respiratory acidosis and metabolic acidosis.

Interventions, Prevention, and Nursing Management of RDS

• Medical treatment and supportive care:

  • Focused on supportive interventions to correct physiological imbalances.

  • Maintenance of a neutral thermal environment.

  • Provision of adequate oxygenation.

  • Correction of respiratory acidosis and metabolic acidosis.

  • Continual monitoring of arterial oxygen levels.

  • Administration of nutrition via parenteral therapy to prevent aspiration risk associated with respiratory distress.

  • Surfactant replacement therapy: Improves overall survival rates and reduces clinical severity.

• Prevention:

  • Prevention of premature delivery is the single most effective measure for reducing RDS.

• Nursing interventions and parent teaching:

  • Primary nursing consideration: Continuously observe and assess the infant's response to therapy to enable timely adjustments of oxygen concentrations and ventilator settings.

  • Perform frequent respiratory assessments.

  • Observe infant behavior continuously for signs of respiratory complications and sepsis.

  • Airway suctioning protocols:

  • Perform suctioning PRN (as needed) only; NEVER suction on a routine schedule (e.g., Q hour or Q4).

  • Vigorous or unnecessary suctioning increases the risk of bronchospasm, airway damage, infection, and pneumothorax.

  • Pneumothorax is defined as a collection of air or gas in the pleural space causing the lung to collapse.

  • Vigorous suctioning increases the risk of hypoxia and elevated intracranial pressure, which can lead to an intraventricular hemorrhage in the neonate.

  • Airway positioning and skin integrity:

  • Position the infant on their side with the head supported in alignment to maintain an open airway.

  • Assess skin frequently and reposition the infant routinely to eliminate pressure points.

  • Apply water-soluble ointment to the nares or around the mouth.

  • Perform regular oral hygiene.

  • Psychosocial support:

  • Provide emotional support to parents.

  • Encourage parental participation in infant care whenever possible to promote parent-infant bonding.

Neonatal Jaundice (Icterus Neonatorum)

• Definition and terminology:

  • Jaundice, also known as icterus neonatorum, is a yellow discoloration of body tissues caused by deposits of bile pigments (bilirubin).

• Initial physical assessment:

  • First detected over bony prominences on the face and across mucous membranes.

  • Demonstrates visible yellow discoloration of the body skin and yellowing of the scleras of the eyes.

Classification of Jaundice: Physiologic vs. Pathologic

• Physiologic Jaundice:

  • Definition: Naturally occurring jaundice resulting from normal post-birth breakdown of red blood cells.

  • Onset and duration: Appears approximately $48\,\text{hours}$ after birth and gradually disappears within $7$ to $10\,\text{days}$.

  • Pathophysiology:

  • Infants possess an increased number of red blood cells at birth that rapidly break down, releasing bilirubin.

  • The immature liver of the newborn struggles to break down excess unneeded red blood cells and process bilirubin.

  • Bilirubin remains in the circulation, producing a yellow appearance on light skin and yellowing of the scleras.

  • Excretion and monitoring:

  • Bilirubin is excreted from the body through the infant's stools.

  • Serum bilirubin levels must be monitored continuously until values return to normal limits.

• Pathologic Jaundice (Hyperbilirubinemia):

  • Onset: Occurs sooner than $48\,\text{hours}$ after birth (frequently developing within the first $24\,\text{hours}$ post-delivery).

  • Primary cause: Maternal-fetal blood incompatibility, most commonly related to Rh incompatibility.

  • Clinical characteristics: Newborn is anemic at birth and experiences difficulty with tissue oxygenation.

Phototherapy Interventions for Neonatal Jaundice

• Therapeutic modality:

  • Delivered via overhead phototherapy lights or a fiberoptic blanket.

• Essential nursing procedures during phototherapy:

  • Shield the infant's eyes at all times while under the phototherapy lights.

  • Remove clothing, leaving only the diaper on to maximize skin surface exposure to the light.

  • Turn the infant frequently to ensure all skin surfaces are exposed evenly.

  • Monitor stool frequency and characteristics.

  • Encourage increased enteral intake (fluid and nutrition) to facilitate bilirubin excretion through stools.

  • Monitor body temperature continuously while under the phototherapy light source.

Care of Infants of Substance-Abusing Mothers: Fetal Alcohol Syndrome (FAS)

• Definition:

  • A distinct series of congenital malformations occurring in infants whose mothers consumed excessive alcohol during pregnancy.

• Clinical manifestations:

  • Growth retardation.

  • Facial anomalies.

  • Central nervous system (CNS) dysfunction.

  • Mental retardation (intellectual disability).

  • Hyperactivity.

• Therapeutic management:

  • Primary medical focus is placed on nutritional support.

  • Provide social support services for the mother or arrange foster care placement for the child if indicated.

Care of Infants of Substance-Abusing Mothers: Neonatal Abstinence Syndrome (NAS)

• Definition:

  • A term used to describe the clinical behaviors exhibited by an infant who was exposed to chemical substances in utero.

• Pathophysiology:

  • At birth, the maternal supply of the addictive chemical substance is severed, causing the infant to undergo acute withdrawal.

• Clinical manifestations (withdrawal signs):

  • Pain.

  • Hyperirritability.

  • Tremors.

  • Sneezing.

  • Yawning.

  • Seizures.

  • Lethargy.

  • Failure to thrive.

  • Permanent neurological damage.

  • Risk of infant death.

• Nursing interventions and management:

  • Treatment varies depending on the specific chemical drug abused.

  • Perform diagnostic drug testing on both the mother and the baby to identify the substance.

  • Monitor the neonate continuously for respiratory depression.

  • Environmental modification (sensory reduction):

  • Decrease environmental stimuli.

  • Dim room lights.

  • Lower ambient room noise.

  • Maintain a minimal-to-no-noise environment.

  • Comfort measures:

  • Firm wrapping/swaddling.

  • Snuggling.

  • Gentle rocking.

  • Nutritional and social support:

  • High priority on maintaining nutrition and hydration status.

  • Provide social support for the mother or initiate foster care placement for the child as needed.

Summary of Self-Assessment Objectives

• Key competency checks:

  • Ability to state the clinical signs and specific interventions for newborns with respiratory distress syndrome (RDS).

  • Ability to describe the causes, timing, and interventions for newborns with physiologic and pathologic jaundice.

  • Ability to detail symptoms exhibited by infants born to substance-abusing mothers (FAS and NAS) along with required neonatal interventions.