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Physiological adjustments (MAIN ONES ) (physiological adaptation of the newborn
Establishing and maintaining respirations
Adjusting to circulatory changes
Regulating temperature
Chemical factors (establishing and maintaining respirations- physiological adaptation of the newborn)
Activation of chemoreceptors in the carotid arteries and aorta due fetal hypoxia
Contraction temporary decrease uterine blood flow and transplacental gas exchange-transient fetal hypoxia
↓Po2 and ↑Pco2, ↓blood pH
Stimulation of the respiratory centre
Thermal factors- temp around the baby (establishing and maintaining respirations- physiological adaptation of the newborn)
↓extrauterine environment (outside the uterus )
stimulates receptors in the skin, resulting in stimulation of the respiratory centre in the medulla.
Note: Cold stress may be important for initializing breathing, but prolonged exposure should be avoided
Mechanical factors (establishing and maintaining respirations- physiological adaptation of the newborn)
Changes in intrathoracic pressure from compression of the chest during vaginal birth.
Relieve of the pressure result in a negative intrathoracic pressure, which helps draw air into the lungs.
Crying of baby
increases the distribution of air in the lungs, promotes expansion of the alveoli.
creates positive pressure which helps to keep the alveoli open.
Sensory factors-5 senses (establishing and maintaining respirations- physiological adaptation of the newborn)
handling or drying the newborn, lights, sounds, and smells of the new environment can also be involved in stimulation of the respiratory centre.
Pain associated with birth can also be a factor
Circulatory adjustment (physiological adaptation of the newborn)
changes after birth
Expansion of the lungs increases the baby's blood pressure
Resulting in a major decrease in the pulmonary pressures and the changes in pressure result in
↓shunting of blood to the ductus arteriosus and closure of the ductus arteriosus
↑ pressure in the left atrium of the heart and lower pressure in the right atrium causing the foramen ovale to close.
Failure may result in patent foramen ovale (hole in heart) and surgical repair is required
R=Deoxygenated
L= Oxygenated
Thermoregulation (physiological adaptation of the newborn)
Heat regulation is most critical to the newborn’s survival.
Anatomical and physiological characteristics of newborns place them at risk for heat loss-hypothermia
Larger body surface to body weight
Less adipose tissue & fat in newborn
Underdeveloped sweating and shivering mechanisms
Blood vessels closer to skin surface – contribute to heat loss
Environmental factors -temperature and humidity of the air, flow and velocity of the air, and the temperature of surfaces in contact with and around the newborn.
Goal of care is to maintain a neutral thermal environment in which heat balance is maintained.
To allow the newborn to maintain a normal body temperature to minimize oxygen and glucose consumption.
Newborn heat loss
Evaporation
Conduction
Radiation
Convection
Evaporation (Newborn heat loss)
Loss of heat when water evaporates from the skin and respiratory tract
heat loss is intensified by failing to completely dry after bathing
Dry baby quickly and remove wet towels/blankets
Conduction (Newborn heat loss)
Heat loss from the body surface to cooler surfaces in direct contact
Prewarm incubator/radiant warmer to ensure warm mattress
Cover x-ray plates and scales
Prewarm hands, stethoscopes, blankets and other equipment
weighing the newborn should have a protective cover to minimize conductive heat loss
Anything that touches baby must be warmed prior to touching baby (notes)
Radiation (Newborn heat loss)
Heat lost to surrounding colder solid objects (not in direct contact) but in close proximity
Keep incubator, warmer, examination table, crib cot away from outside walls and windows
Dress baby
Care providers need to avoid exposing the newborn to direct air drafts.
Convection (Newborn heat loss)
Heat lost from the body surface to cooler ambient air
Raise surrounding 22° and 26°C
Cover baby’s head
Wrap and dress baby
Warm O2
Effects of Cold stress
When a newborn is stressed by cold, oxygen consumption increases and pulmonary and peripheral vasoconstriction occur, thereby decreasing oxygen uptake by the lungs and oxygen to the tissues; anaerobic glycolysis increases; and there is a decrease in Po2 and pH, leading to metabolic acidosis.
If the baby doesn’t get enough oxygen, the body switches to anaerobic metabolism, producing lactic acid → causing acidosis.
Newborn assessment
Immediately after Birth
Head to Toe
APGAR score
Immediate Newborn assessment-Apgar scoring
Immediate assessment of the newborn done at 1 and 5 minutes after birth
Scores of 0 to 3-indicate severe distress,
Scores of 4 to 6 indicate moderate difficulty
Scores of 7 to 10 indicate that the newborn is having minimal or no difficulty adjusting to extrauterine life
Reassessment is at 10 and 20 minutes if the score is less than 7 at 5 minutes
Resuscitation may occur at any point when the newborn is compromised and should not wait until the initial 1-minute Apgar score
Score 2 (APGAR score)
Appearance: Pink
Pulse: >100 bpm
Grimace: Cries and pulls away
Activity: active movement
Respiration: Strong cry
Score 1 (APGAR score)
Appearance: Extremities blue
Pulse: <100 bpm
Grimace: grimaces or weak cry
Activity: arms and legs flexed
Respiration: slow irregular
Score 0 (APGAR score)
Appearance: Pale or blue
Pulse: No pulse
Grimace: No response to stimulation
Activity: no movement
Respiration: no breathing
Respiratory system-Newborn assessment
Observe rise/fall of chest for 1 full minute
Auscultate lung sounds
Normal – 30-60 bpm,
shallow & irregular;
apneic periods of 5-10 seconds as fluid is being absorbed/expelled
Possible crackles - 1st hr. after birth
Acrocyanosis – normal finding during transition
Look for signs of respiratory distress
Chest retractions
Grunting with expirations
Increase use of the intercostals muscles
Nasal flaring
Respiratory rate < 30 or > 60 breaths/min should be reported
Cardiovascular system-Newborn assessment
heart rate between 110 and 160 beats/min
Heart rate <110 or >160 re-evaluate after 30 to 1 hour
Heart murmurs heard during the first few weeks have no pathologic significance
murmurs disappear by 6 months
Average systolic BP is 60 to 80 mm Hg, and average diastolic BP is 40 to 50 mm Hg
Fetal Hb – high affinity for oxygen to promote oxygenation while infant begins producing own Hb postnatally
Hb level 14-24 g/dl
Blood volume 300mls
Time taken to clamp cord
Signs of Cardiovascular concern- Newborn assessment
Persistent tachycardia (more than 160 bpm)
anemia, hypovolemia, hyperthermia, or sepsis.
Persistent bradycardia (less than 100 bpm) congenital heart block, hypoxemia, normal sinus bradycardia, or hypothermia.
Unequal or absent pulses, bounding pulses, and decreased or elevated blood pressure can indicate cardiovascular concerns
Fontanelles (only two types)
Anterior fontanel 5-cm, diamond shaped, increases as moulding resolves
Closes within 18 months
Posterior fontanel triangle 0.5x1 cm, smaller than anterior
Closes within 8-12 weeks after birth
Sutures (Allow for brain growth)
Should be palpable and separated suture, possible overlap of sutures with moulding
Widely spaced (hydrocephalus)-too much fluid in brain
Premature closure (fused) (craniosynostosis)-skull bones close too early
Signs of Fontanel concerns
Full, bulging (tumour, hemorrhage, infection)
Large, flat, soft (malnutrition, hydrocephalus, delayed bone age, hypothyroidism) -> ask about mother feeding patterns (note)
Depressed (dehydration)
Cephalhematoma (Fontanelle)
is the collection of blood between the skull bone and its periosteum caused by external
Pressure during L & D
Forceps delivery
Largest on the second or third day,
Feels boggy, edematous to touch
Does not cross suture lines
Resolves in 3 to 6 weeks
Not aspirated due to risk of infection
Increase risk of jaundice
Caput succedaneum (Fontanelle)
Localized edematous area of the soft tissues of the scalp.
Presenting part causes compression of local vessels slowing venous return
increase in tissue fluids within the skin of the scalp
edematous swelling develops.
Extends across the suture lines of the skull
Disappears spontaneously within 3 to 4 days.
Mouth-Newborn assessment
Lips should be symmetrical
Pink, moist lips and mucosa
Sucking blisters - from breastfeeding latch
Saliva not excessive
Intact hard and soft palate; freely moving tongue
Tongue not protruding; freely movable; symmetrical movement
Sucking pads inside cheeks
Uvula in midline
Epstein’s pearls: small, firm white cysts on gums. Resolve on its own during 1st weeks
Anatomical groove in palate to accommodate nipple, disappearance by 3–4 yr of age
Common conditions (Mouth-Newborn assessment)
Thrush: White plaque – similar to milk curds, does not easily scrape off
Precocious (or natal), predeciduous-presence of teeth at birth (hereditary)
Cleft lip/palate (Mouth- Newborn Assessment)
Cyanosis, circumoral pallor (respiratory distress, hypothermia)
Asymmetry in movement of lips (seventh cranial nerve paralysis)
Short lingual frenulum (ankyloglossia- tongue-tie)
Female genitalia (Genito-Urinary system Newborn assessment)
Labia – examined for size. Labia majora develops close to term
Assess to ensure that labia are not fused
Assess ambiguous genitalia
Milky vaginal discharge- due to circulating maternal hormones
Pseudomenses: blood tinged mucous – due to hormones of pregnancy
Vaginal tag: (hymenal tag) usually disappears in first few weeks after birth
Swelling of the breast tissue in term newborns of both sexes-due to hyperestrogenism in utero
few newborns a thin discharge can be seen.
Male Genitalia (Genito-Urinary system Newborn assessment)
Male genitalia
Hypospadias-urine will drip down
needs surgery to correct before circumcision: Urinary meatus on ventral surface of penis (underside).
Circumcision is contraindicated in the presence of hypospadias or epispadias since the foreskin is used in repair of these anomalies
Epispadias: Meatus on the dorsal surface
Phimosis: Foreskin cannot be fully retracted
A tight prepuce (foreskin) is common in newborns and completely covers the glans-rounded tip of penis
Hydrocele: Collection of fluid around testes
Discoloration of testes – assess for testicular torsion
Crepitus in groin or scrotal sac indicates hernia
Undescended testes; (cryptorchidism)
Failure of testes to descend into scrotal sac in term infant
Skin (Newborn assessment)
Pink varying with ethnic group, well perfused
Perfusion assessed by capillary refill of 2 seconds or less
Skin should spring back when pinched
dehydration if fold of skin persisting after release of pinch) Skin is soft, dry texture.
Acrocyanosis: Bluish discoloration of hands and feet 1st 6 -8 hr. post birth (due to cardiovascular immaturity)
Post-mature infants may have dry skin, cracking on feet and hands
Loose, wrinkled skin (prematurity,)
Mottling: due to temperature instability; overstimulation of autonomous nervous system
Tense, tight, shiny skin (edema, extreme cold, shock, infection)
Extremities (Newborn assessment)
Full range of motion of arms & shoulders
Assess leg length – equal, with symmetrical gluteal creases
Assess for club foot (talipes equinovarus)
Back should be straight, flexible
Pilonidal dimple - cleft at base of sacrum, generally benign
Digits
Extra digits: polydactyly
Webbing: Syndactyly
Hip displacement, look at folds on thigh
Sucking-Newborn Reflexes (Newborn assessments)
When anything is placed in mouth or touches lips look for present
Rooting -Newborn Reflexes (Newborn assessments)
infant turns head when side of mouth/ cheek is stimulated. Present for 3-4 months.
Aids in latching
look how long its been going on for
Moro -Newborn Reflexes (Newborn assessments)
Startling infant, - response by symmetrically extending arms outward while knees flex. Can last up to 6 months
Most sensitive assessment for infant’s neurological system
Babinski -Newborn Reflexes (Newborn assessments)
(plantar reflex). Hyperextension of toes when the sole is stroked from heel up to ball of foot. Disappear by age 1 year.
Prophylactic & Screening Measures (Newborn assessment)
0.5% Erythromycin eye ointment within 1 hr. of birth to prevent eye infections caused by maternal gonococcal transmission
Vitamin K injection within 1 hr. birth vs. hemorrhage
Hep. B vaccine at birth (against all known Hep B subtypes), HBIG 12 hrs after birth If maternal hep. B surface antigen is positive or unknown
Blood glucose monitoring – baseline at 2 hr. post-birth if gestational diabetes, LGA, or SGA; ½-1 hr. post birth if symptoms of hypoglycemia occur earlier
Heel prick for bilirubin levels, phenylketonuria (PKU) & hypothyroidism (mental retardation if untreated), sickle cell
Screening for congenital heart disease: pre-ductal (right hand) and post-ductal (any foot) oxygen saturation obtained. Repeat screen if >3% difference between 2 readings or if O2 sat is less than 94% on either extremity.
Hearing to assess for hearing loss
Pain in the Newborn
Newborn responses to pain
Assessment of pain in the newborn
Goal of newborn pain management
minimize the intensity, duration, and physiological cost of the pain
maximize the newborn’s ability to cope with and recover from the pain.
Nonpharmacological management
Pharmacological management
Observe for variations (Pain in the Newborn)
Vital signs: increased heart rate, increased blood pressure, rapid, shallow respirations
Oxygenation: increase oxygen saturation, decrease arterial oxygen saturation
Skin-observe colour and character: pallor or flushing, diaphoresis, palmar sweating
Vocalizations: Crying, whimpering, groaning
Facial expression: Grimaces, brow furrowed, chin quivering, eyes tightly closed, mouth open and squarish
Body movements and posture: Limb withdrawal, thrashing, rigidity, flaccidity, fist clenching
Changes in state: changes in sleep-wake cycles, feeding behaviour, activity level, fussiness, irritability, listlessness
Management of pain in the Newborn
Non-nutritive sucking on a pacifier promote comfort
Oral sucrose in small amounts given with a syringe with or without a pacifier for sucking reduces pain during single events
Skin-to-skin contact (kangaroo) care help reduce pain during a painful procedure
Breastfeeding or breast milk helps reduce pain during heel lancing and blood collection
Swaddling or snugly wrapping the newborn with a blanket aids in self-regulation, and reduces physiological and behavioural stress resulting from acute pain
Safe swaddling is important
Touch, massage, rocking, holding, and environmental modification (e.g., low noise and lighting).
Discharge planning and teaching for the Newborn
Community follow-up
Temperature
Respirations
Feeding patterns
Elimination
Prevention of sudden infant death syndrome (SIDS)
Rashes
Diaper rash
Other rashes
Clothing
Car seat safety
Non-nutritive sucking
Bathing
Umbilical cord care
Newborn follow-up care
Cardiopulmonary resuscitation
Practical suggestions for the first weeks at home
Recognizing signs of illness
Recommended not to sleep in the same bed as baby
Not putting stuff in the crib
Caring for high risk Newborns
Infants who are born considerably before term and survive are particularly susceptible to development of sequelae-a condition or complication that happens as a result of a previous illness or injury related to preterm birth.
High-risk infants are most often classified according to:
birth weight
gestational age
common pathophysiological problems
Jaundice
Preterm
Diabetes
Meconium aspiration in newborn
Jaundice in newborns
Hyperbilirubinemia
bilirubin greater than 340 mcmol/L in the first 28 days
Causes
Increase bilirubin level due break down in RBC
Short lifespan of leads to RBC mass breakdown
Immature liver to cannot break down bilirubin for excretion
Hepatic obstruction
Unconjugated bilirubin is highly toxic to neurons
Risk factors (Jaundice in Newborns)
Maternal fetal Rh or ABO incompatibility
Sepsis
Polycythemia (↑RBC)
Biliary atresia-liver problem in babies where the tubes that carry bile from the liver to the intestine are blocked or missing
Liver impairment
Hypoglycemia
Pre-term birth
Delayed passage of meconium
Large cephalohematoma at birth
Hypoxia
Hypothermia
two types
Pathologic
physiological
Physiological Jaundice (Types of Newborn jaundice)
60% of newborns born at term and 80% of preterm infants.
Appears after 24 hours of age and usually resolves without treatment.
unless bilirubin levels rise higher or faster than normal
Pathological Jaundice (Types of Newborn jaundice)
Appears within 24 hours of birth
Total unconjugated bilirubin levels >100 mcmcol/L in 24 hours
level exceeds >256 mcmol/L at any time
Untreated ↑ unconjugated bilirubin is neuro toxic to brain
Acute bilirubin encephalopathy (lethargy, hypotonia-low muscle tone makes muscles feel flopy or weak, poor sucking irritability, seizures, coma, and death)
Kernicterus: irreversible long-term consequences of bilirubin toxicity, (hypotonia, delayed motor skills, hearing loss, cerebral palsy, and gaze abnormalities)
Phototherapy (Jaundice treatment)
Use to reduce the level of circulating unconjugated bilirubin or to keep it from increasing
bilirubin level begin to decrease within 4 to 6 hours after; within 24 hours decrease by 30 to 40%
to discontinue therapy is based on a definite downward trend in bilirubin values
Precautions phototherapy (Jaundice treatment)
Newborn’s eyes must be protected by a shield to prevent retinal damage
Temperature should be closely monitored at least every 2 hours
Possibility of heat loss and dehydration- due to stool loss
(feeding is critical )
No ointments- heath absorption and cause burns
Loose stool due to bilirubin breakdown-buttocks must be cleaned after each stool to maintain skin integrity
Ensure consistent + proper cleasing
no lubercant like vaseline should be used (note)
Preterm
Preterm-born before completion of 37 weeks of gestation regardless of the weight of the infant
Organ and systems are immature
Lack of adequate physiological reserves to function in the extrauterine environment.
Is the leading cause of newborn deaths globally
accounting for almost 40% in Canada
Low birth weight (LBW)-newborns weighing 2 500 g or less Increase risk for health issues,
Extremely low birth weight (ELBW)-birth weight of less than 1000 g (2 lb, 3 oz)
Practical and ethical dimensions of resuscitation of extremely low-birth-weight infants (ELBW
Causes of preterm birth multifactorial
poverty (which can contribute to suboptimal health care and prenatal nutrition)
maternal infections
previous preterm birth
multiple pregnancies
pregnancy-induced hypertension, placental conditions that interrupt the normal course of gestation
Smoking
Advanced maternal age
Fetal disorders
intrauterine growth restriction (IUGR)
(associated with LBW)
Preterm (risks)
Respiratory distress
Thermal instability
Hypoglycemia
Jaundice’
Feeding difficulties
Neurodevelopmental issues (speech, behavioural, and cognitive)
Infection
Preterm (Complications)
Respiratory distress syndrome (RDS)- most common reason for death
Patent ductus arteriosus- when the ductus arteriosus (a blood vessel connecting the aorta and pulmonary artery) stays open after birth, causing abnormal blood flow between the heart and lungs.
Periventricular-intraventricular hemorrhage
Necrotizing enterocolitis- a serious intestinal disease in newborns where part of the bowel becomes inflamed and starts to die.
Respiratory support (Preterm nursing care)
Oxygen therapy
Nasal cannula
Continuous distending pressure
Mechanical ventilation
Weaning from ventilatory support
Cardiovascular support (Preterm nursing care)
Assess
heart rate and rhythm, skin colour, blood pressure, perfusion, peripheral pulses, oxygen saturation
Thermoregulation (Preterm nursing care)
Maintaining a neutral thermal environment (NTE)
Kangaroo care
Neurological (Preterm nursing care)
Monitor for seizure activity, hyperirritability, CNS depression, elevated intracranial pressure, and abnormal movements.
Nutrition and hydration (Preterm nursing care)
Breastfeed if sucking and swallowing reflexes are adequate and no other contraindications.
Gavage feeding (nasogastric or orogastric tube)
Gastrostomy feeding (surgical placement of a tube through abdomen into the stomach.
Supplemental parenteral fluids to supply additional calories, electrolytes, or water.
Renal support (Preterm nursing care)
Assess acid–base and electrolyte balance
serum levels of medication for adequate therapeutic range for treatment and to prevent toxicity
Hematological support
Signs of bleeding, anemia
Nurturing environment (Preterm nursing care)
Avoid slamming doors (including isolette portholes), listening to radios, talking loudly, and handling equipment (e.g., trash containers), jarring chairs
Monitoring sound levels in the nursery
Shielding newborns’ eyes from bright lights
Clustering of care and assessments to enable undisturbed sleep periods
Skin care (Preterm nursing care)
Care must be taken to avoid damage to the delicate structure.
Use skin products (e.g., alcohol, chlorhexidine, povidone-iodine) with caution
Rinsed with water afterward to prevent severe irritation and chemical burns in VLBW- very low birth weight and ELBW- extremely low birth weight infants.
Minimal use of adhesive tape, backing the tape with cotton, and delay removal adhesive until adherence is reduced
Protection from infection (Preterm nursing care)
Strict hand hygiene is the single most important measure to prevent infections
Large for gestational age (LGA)
Newborn birth weight is above the ninetieth percentile on growth charts
Higher incidence of birth injuries
Asphyxia (lack of oxygen and buildup of carbon dioxide in the blood)
Congenital anomalies such as heart defects.
Causes of large for gestational age
Maternal diabetes in the mother (most common cause)
Maternal obesity
Having had previous LGA babies
Genetic abnormalities or syndromes
Excessive weight gain during pregnancy
Infants of Diabetic mothers
Higher Risk of Hypoglycemia
High maternal blood glucose levels during fetal life stimulate the fetal islet cells to produce insulin
Leads to hypertrophy and hyperplasia of the pancreatic islet cells-transient state of hyperinsulinism
Sudden removal of newborn’s glucose supply after birth + continued production of insulin
depletes the blood of circulating glucose
creating a state of hyperinsulinism and hypoglycemia within 0.5 to 4 hours
Quick drops in blood glucose levels leads to neurological damage or death
*Baby is used to be in sugary environment
when baby is out of insulin in being release as it is still in the womb*(note)
Clinical manifestations (Infants of diabetic mothers)
Macrosomia or Large for gestational age
Very plump and full faced
Abundant vernix caseosa
Plethora (ruddy complexion)
Listless and lethargic
Possibly meconium stained at birth
Hypotonia
Complications (Infants of diabetic mothers)
Hypoglycemia, hypocalcemia, hypomagnesemia, polycythemia, hyperbilirubinemia, cardiomyopathy,
Respiratory Distress Syndrome
CNS anomalies-anencephaly, spina bifida, and holoprosencephaly-abnormal development of the forebrain
Cardiac anomalies- ventricular septal defects and coarctation of the aorta
Sacral agenesis and caudal regression
Increased risk for birth injuries
Sacral agenesis/caudal regression (Infants of Diabetic Mothers)
a rare birth defect where the lower spine (sacrum) and sometimes lower limbs don’t develop properly, affecting mobility and organ function
Management and nursing care (Infants of diabetic mothers)
Feedings with breast milk or formula initiated within the first hour after birth if cardiorespiratory status stable
If enteral supplementation failed or infant unable to feed
continuous IV infusion of 10% dextrose at 4 to 6 mg/min/kg
If blood blood glucose is below 1.8 mmol/L, a one-time bolus infusion of 10% dextrose (200 mg/kg) should be given over 2 to 4 minutes,
followed by a continuous IV infusion of 10% dextrose
Evaluation of serum glucose 30 minutes
pharmacological agents (glucagon and diazoxide) may be required
Monitoring for symptoms of hypoglycemia in an IDM include
jitteriness or tremors
cyanotic episodes
seizures,
intermittent apneic(not breathing) episodes
difficulties feeding
Assess for congenital anomalies, signs of possible respiratory or cardiac issues
Maintenance of adequate thermoregulation
Monitoring of serum blood glucose levels.
Monitored closely for hyperbilirubinemia.
Discharge planning for high-risk infants
Parents should be given the opportunity to room-in and spend a night or two providing care
Home care needs of infant's parents are assessed.
Referrals for appropriate resources
Assistance with medical supplies
Parent teaching include bathing and skin care, infection prevention
Nutritional requirements for meeting nutritional needs
Parent education and opportunity for return demonstrations care skills
Age-appropriate car seat
Health care provider contact
Appropriate immunizations, metabolic screening, hematology assessment, and evaluation of hearing and for retinopathy of prematurity (ROP) before discharge
Transport to a regional centre
Interprofessional and family-centred approach-Medical, nursing, social services, and other professionals (physiotherapy, occupational therapy, developmental follow-up specialist) are critical for successful transitioning and long term neurocognitive development