Chapt 21

Immediate Post-Birth Assessment and Priorities

• Transition to Extrauterine Life: The initial assessment in the delivery room focuses on how the newborn adapts to life outside the womb. This is a continuous process that should be integrated with bonding activities whenever the infant is stable.

• Cardiorespiratory Status: This is the highest priority. The assessment determines if the baby is breathing or crying, possesses good muscle tone, displays appropriate color, and maintains effective respirations. This determines if the transition is successful or if immediate intervention is required.

• Thermoregulation: Newborns are highly vulnerable to heat loss. Immediate interventions include:

  • Drying the baby thoroughly, with specific attention to the head.

  • Utilizing skin-to-skin contact with a parent.

  • Placing the infant under a radiant warmer.

  • Frequent monitoring of the baby's temperature.

• Physical Anomalies: A rapid scan for obvious abnormalities such as cleft lip, cleft palate, neural tube defects, or limb abnormalities that require immediate medical attention.

• Need for Resuscitation: A quick evaluation of breathing, heart rate, muscle tone, and responsiveness to determine if emergency resuscitative measures are necessary.

Cardiorespiratory Status in the Newborn

• Core Objectives: The assessment aims to answer two fundamental questions: Is the baby oxygenating well? Is the baby perfusing well?

• Respiratory Rate:

  • Normal range: $30-60\,\text{breaths per minute}$.

  • Procedure: Counts must be performed for a full minute because newborns exhibit irregular breathing patterns.

  • Physiology: Higher metabolic demands necessitate faster breathing rates compared to adults.

• Respiratory Effort:

  • Observation: Chest rise and fall should be symmetrical and appear relatively effortless.

• Lung Sounds:

  • Crackles: Often present in the first $1-2\,\text{hours}$ as fetal lung fluid is cleared.

  • Coarse Sounds: Common in infants born via Cesarean section without the "squeeze" of labor.

  • Concerning Sounds: Persistent crackles, wheezing, stridor, or significantly diminished breath sounds.

  • Abnormalities: Bowel sounds heard in the chest may indicate a diaphragmatic hernia.

• Signs of Respiratory Distress:

  • Tachypnea: Respiratory rate exceeding $60\,\text{breaths per minute}$.

  • Retractions: Inward pulling of soft tissue (intercostal, subcostal, or suprasternal). While mild retractions can be normal immediately after birth, persistence is a concern.

  • Nasal Flaring: Widening of the nostrils with each breath to increase air intake.

  • Grunting: A physiological compensatory mechanism where the infant partially closes the vocal cords during expiration to keep the alveoli open. Persistent grunting is a major red flag.

• Color Assessment:

  • Central Cyanosis: Bluish discoloration of the lips, tongue, mucous membranes, or trunk; indicates inadequate oxygenation and is always abnormal.

  • Acrocyanosis: Bluish discoloration of the hands and feet. This is normal during the first $24\,\text{hours}$ of life or when the baby is cold, provided the trunk and mucous membranes remain pink.

• Cardiovascular Assessment:

  • Heart Sounds: Evaluation of rate, rhythm, and the presence of murmurs (which must always be documented and evaluated).

  • Pulses: Brachial and femoral pulses should be checked for symmetry. Weak or absent femoral pulses compared to brachial pulses suggest coarctation of the aorta.

  • Capillary Refill: Normal refill is < 3\,\text{seconds}. Delayed refill indicates poor perfusion or circulatory compromise.

Thermoregulation and Cold Stress Prevention

• Vulnerability: Newborns lose heat easily due to a large surface-area-to-volume ratio and immature internal thermoregulatory mechanisms.

• Cold Stress: This occurs when the baby's heat loss exceeds its heat production. This is dangerous because it forces the baby to consume oxygen and glucose that are needed for vital functions.

• Prevention Strategies:

  • Immediate drying of the infant after birth, especially the head.

  • Replacing wet blankets promptly with warm, dry ones.

  • Maintaining skin-to-skin contact with parents.

  • Pre-warming equipment like warmers and blankets.

• Temperature Monitoring:

  • Normal Axillary Range: $36.5^\circ\text{C}$ to $37.5^\circ\text{C}$ ($97.7^\circ\text{F}$ to $99.5^\circ\text{F}$). Note that some standards cite $35.5^\circ\text{C}$ to $37.5^\circ\text{C}$ ($95.9^\circ\text{F}$ to $98.6^\circ\text{F}$); always follow specific facility policy.

  • Method: Axillary measurement is preferred over rectal.

  • Frequency: Reassess every $30\,\text{minutes}$ until the temperature has been stable for at least $2\,\text{hours}$.

• Radiant Warmers: These should be servo-controlled. A skin temperature probe is placed on the infant (usually on the abdomen over the liver). It acts as a thermostat to regulate heat output. Servo control is usually set at $36.5^\circ\text{C}$ ($97.7^\circ\text{F}$).

• Signs of Hypothermia/Cold Stress:

  • Poor feeding behavior.

  • Unusual sleepiness or irritability.

  • Respiratory distress.

  • Hypoglycemia.

  • Cool, mottled skin.

  • Decreased muscle tone.

Head and Scalp Assessment

• Molding: The overlapping of skull bones to allow the head to pass through the birth canal. This changes the head shape temporarily and resolves within a few days.

• Sutures: The spaces between skull bones. They may feel separated due to molding. Widening sutures can indicate increased intracranial pressure, while early fusion (craniosynostosis) can restrict brain growth.

• Fontanelles:

  • Anterior Fontanelle: Diamond-shaped and located on the top of the head. It is the larger of the two and normally closes by $18\,\text{months}$. It should be soft and flat.

  • Posterior Fontanelle: Triangular and smaller, often feeling like a dimple. It closes by approximately $2\,\text{months}$.

  • Abnormalities: Depressed fontanelles suggest dehydration; bulging fontanelles in a quiet infant suggest increased intracranial pressure.

• Scalp Swelling:

  • Caput Succedaneum: Soft tissue edema caused by pressure against the cervix during labor. It is present at birth, feels "squishy," crosses suture lines, and resolves in $12-48\,\text{hours}$.

  • Cephalohematoma: Bleeding beneath the periosteum (skull bone covering) caused by birth trauma (e.g., vacuum extraction). It does not cross suture lines (confined to one bone) and may not be obvious until $24-48\,\text{hours}$ after birth. It increases the risk of jaundice as the blood collection breaks down into bilirubin.

Face, Neck, and Umbilical Cord Evaluation

• Face: Assessed for symmetry of movement (especially when crying) and features that might suggest genetic conditions.

• Neck: Typically short in newborns. Assess for full range of motion. Webbing is associated with chromosomal abnormalities. Large fat pads, masses, or swelling require evaluation.

• Clavicles: Frequently fractured during birth, particularly in large infants or cases of shoulder dystocia. Signs include swelling, tenderness, lumps, crepitus, or decreased arm movement (asymmetrical Moro reflex).

• Umbilical Cord:

  • Vessels: Normally contains $2\,\text{arteries}$ and $1\,\text{vein}$. A Single Umbilical Artery (SUA) is associated with renal, cardiac, or chromosomal abnormalities.

  • Appearance: A thin cord suggests poor maternal nutrition. Meconium staining results in a green or yellow-brown color. Infection signs include redness, drainage, or a foul odor.

Extremities, Muscle Tone, and Vertebral Assessment

• Posture and Movement: Healthy term infants are typically flexed at the arms and legs and resist extension. Movement should be spontaneous and symmetrical.

• Muscle Tone (Hypotonia): A "floppy" infant is a critical finding that may indicate prematurity, mild hypoxia, or neurologic injury. A sudden change from flexed to limp is highly concerning (infection, hypoglycemia, or distress).

• Hands and Feet:

  • Check for polydactyly (extra digits) or syndactyly (webbing).

  • Nails should reach the fingertips in term infants.

  • Palmar Creases: A single transverse crease (simian crease) can be associated with Down syndrome.

  • Clubfoot: Positional clubfoot corrects easily with manipulation; structural clubfoot is fixed and requires intervention.

• Hips: Screened for Developmental Dysplasia of the Hip (DDH). Signs include unequal knee height, asymmetrical skin creases, or limited abduction. Providers use Barlow and Ortolani maneuvers to check for "clunks" (femoral head movement).

• Vertebral Column: The spine is palpated for symmetry.

  • Spina Bifida Occulta: Indicated by a dimple or indentation.

  • Meningocele: A sac containing meninges and CSF.

  • Myelomeningocele: A sac containing meninges, CSF, and spinal cord tissue; this requires a moist sterile dressing for protection.

• Pilonidal Dimple: Usually harmless but must be assessed for depth.

Newborn Growth Measurements and Gestational Age

• Weight:

  • Normal term birth weight: $2500-4000\,\text{g}$.

  • Weight Loss: $5-7\%$, and up to $10\%$, is normal in the first week. Loss > 10\% is a concern.

  • Regain: Infants should return to their birth weight by $14\,\text{days}$.

• Length: Measured from the crown of the head to the heel.

• Head Circumference: Normal range is $32-38\,\text{cm}$. Measured at the largest part (occiput to just above eyebrows). Small size suggests microcephaly; large size suggests hydrocephalus.

• Chest Circumference: Measured at the nipple line; typically $1-2\,\text{cm}$ smaller than the head.

• Gestational Age Classification:

  • Appropriate for Gestational Age (AGA): Between the $10\text{th}$ and $90\text{th}$ percentile.

  • Small for Gestational Age (SGA): < 10\text{th} percentile; risk for hypoglycemia and cold stress.

  • Large for Gestational Age (LGA): > 90\text{th} percentile; risk for birth trauma and hypoglycemia.

Neurologic and Sensory Assessment

• Reflexes: Evaluation includes Moro, palmar grasp, plantar grasp, Babinski, rooting, sucking, tonic neck (fencing), and stepping. Asymmetry suggests injury (e.g., brachial plexus injury or clavicle fracture).

• Sensory Evaluation:

  • Ears: The top of the ear should align with the outer canthus of the eye. Low-set ears suggest chromosomal or renal abnormalities.

  • Hearing: All infants receive a screening before discharge. They should startle to loud noises and turn toward voices.

• Jitteriness vs. Seizures:

  • Jitteriness: Common; stops with gentle restraint or flexion of the limb. Often caused by hypoglycemia, hypocalcemia, or drug exposure. Always check blood sugar.

  • Seizures: Do not stop with restraint. May be subtle (lip smacking, rhythmic eye movements).

• Cry and Behavior:

  • Normal: Strong and vigorous; baby is consolable and molds to the caregiver.

  • Abnormal Cry: Shrill or high-pitched (neurologic irritation/ICP), weak (illness), or cat-like (genetic syndromes).

  • Abnormal Behavior: Arching away or stiffening.

Hepatic System: Blood Glucose and Bilirubin Management

• Blood Glucose Screening: Not routine for all; focuses on high-risk groups (preterm, post-term, SGA, LGA, infants of diabetic mothers, or stressed infants).

  • Symptoms of Hypoglycemia: Jitteriness, poor feeding, lethargy, or respiratory distress.

  • Values: Target is $\ge 45-50\,\text{mg/dL}$ before feeding. Intervention is needed if glucose is < 40\,\text{mg/dL} in the first few hours.

• Bilirubin Assessment: Checked every $8-12\,\text{hours}$ in at-risk babies.

  • Blanching Test: Pressing skin on the nose or sternum to check for yellow color.

  • Progression: Jaundice follows a cephalocaudal (head-to-toe) pattern. Face jaundice represents lower levels than leg jaundice.

  • Diagnostics: Transcutaneous Bilirubin (TcB) is used for screening; Serum Bilirubin (blood draw) is for confirmation and treatment guidance.

  • Phototherapy: Lights convert bilirubin to lumirubin (water-soluble). Infants are kept in only a diaper with eye patches to maximize skin exposure.

Gastrointestinal and Genitourinary Assessment

• Mouth:

  • Epstein Pearls: Small white bumps on gums; normal.

  • Tongue: Protruding tongue can indicate hypothyroidism or chromosomal issues.

  • Thrush: White patches that indicate infection; they do not wipe off easily and may bleed if wiped.

  • Sucking: A strong suck reflex is essential for feeding; sucking pads in cheeks assist this.

• Feeding:

  • Coordination: Monitor sucking, swallowing, and breathing. Excessive choking or cyanosis during feeding may indicate esophageal atresia or Tracheoesophageal Fistula (TEF).

• Stools: Meconium (thick, black, tarry) should pass within $12-48\,\text{hours}$. Transitional stools appear around $day\,3$. Milk stools are yellow/seedy (breastfed) or pale yellow/brown (formula-fed).

• Genitourinary System:

  • First Void: Usually within $12-24\,\text{hours}$. Absence by $24\,\text{hours}$ is concerning.

  • Brick Dust: Reddish-orange uric acid crystals in the diaper are normal in the first few days.

  • Female Genitalia: Labia may be swollen. Pseudomenstruation (small bleeding) is a normal response to maternal hormone withdrawal.

  • Male Genitalia: Meatus should be at the tip. Hypospadias (underside opening) or Epispadias (topside opening) require delayed circumcision. Hydrocele (fluid in scrotum) will transilluminate and usually resolves.

Skin Assessment and Variations

• Normal Findings: Pink or tan depending on ethnicity.

• Gestational Variations:

  • Preterm: Red, thin, translucent skin with visible veins.

  • Post-term: Dry, cracked, peeling, or leathery texture.

• Color Abnormalities:

  • Plethoric/Ruddy: Can indicate polycythemia.

  • Central Cyanosis: Abnormal; requires immediate intervention.

  • Acrocyanosis: Normal for the first $24\,\text{hours}$.