GEORGIA BAPTIST COLLEGE OF NURSING OF MERCER UNIVERSITY NUR 330 Nursing Care of the Childbearing Family Unit 5: Holistic Care of the Neonatal Client Class Notes Neonatal Adaptation to Extrauterine Life 1.1 Respiratory Adaptation: To establish respiratory function the following must occur: 1. Initiation of extrauterine respiratory movements 2. Air entry must overcome opposing forces so that the lungs expand. 3. Some air must remain in the alveoli (functional residual capacity) during expiration to prevent lung collapse. 4. Pulmonary blood flow must increase and cardiac output must be redistributed Factors opposing the first breath include: (1) (2) (3) Stimuli that initiate respirations: Mechanical – compression of thorax during birth increases intrathoracic pressure and expels fetal lung fluid. At birth the chest wall recoilssmall passive inspiration. Chemical – Transitory asphyxia during birth pCO2 , pO2stimulate aortic and carotid chemoreceptors impulses medullary respiratory center which in stimulates respirations Sensory–thermal - in environmental temperature (cooling) skin nerve endings stimulated impulses to medullary respiratory center. 1 With the onset of respiration, the functions of the cardiovascular and respiratory systems become interrelated. As air enters the lungs, p02 rises in the alveoli which stimulates the relaxation of the pulmonary arteries and triggers a decrease in the pulmonary vascular resistance and lowering of pulmonary artery blood pressure. Reduced pulmonary vascular resistance results in increased blood flow into the lungs. Removal of placental circulation (clamping of cord) increases the newborn's peripheral vascular resistance, which increases systemic blood pressure. The reversal of the relationship between pulmonary artery blood pressure and systemic blood pressure results in the closure of the right-to-left shunts found in fetal circulation Fetal Circulation: Pulmonary Artery BP higher than Systemic BP (Right side pressure higher than left side pressure thus blood shunted from pulmonary artery to descending aorta circulation through the ductus arteriosus) Neonatal Circulation: Systemic BP higher than Pulmonary BP (Left side pressure higher than right side pressure thus direction of shunting is reverse of fetal circulation) Characteristics of Neonatal Respiration: Normal rate = Initial respirations may be diaphragmatic with shallow and irregular depth and rhythm. They then become abdominal and diaphragmatic. Short periods of apnea (5-15 sec) are common. Periodic breathing may occur. 2 Signs of neonatal respiratory distress: (1) (2) (3) (4) (5) 1.2 Cardiovascular Adaptation: Expansion of the lungs with the first breath decreases the pulmonary vascular resistance and increases left atrial pressure. Clamping of the cord raises systemic vascular resistance. This physiologic mechanism marks the beginning of transition from fetal to neonatal circulation. Several cardiovascular changes occur: 1. Dilation of pulmonary blood vessels and blood flow 2. Increased peripheral vascular resistance results in systemic blood pressure 3. Ductus arteriosus constricts due to O2 saturation of blood and blood is no longer shunted from pulmonary artery to aorta due to reversal of the pressure relationship between pulmonary systemic circulation. Ductus arteriosus functionally closes by 24 hours of age. 4. pressure in left atrium and pressure in right atrium closes foramen ovale within minutes. Some right to left shunting may normally continue for a few months. 5. Ductus venosus (shunts blood from umbilical vein to inferior vena cava in fetus) closes 3-7 days after birth. Closure mechanism unknown. Characteristics of the neonatal cardiovascular system: Heart rate: Resting rate as low as: A rate while crying may be as high as: 3 Average B/P is 65-95 30-60 1.3 Hematologic Adaptation Normal newborn hemoglobin range: Normal newborn hematocrit range: Normal Newborn WBC ranges: 1.4 Temperature Regulation Temperature regulation requires the newborn to balance loss of heat to the environment and the production of heat. Humans are homeotherms (warm blooded) because they can maintain a constant core body temperature in a wide range of environmental temperatures. Newborns, however, have a greatly reduced range of environmental temperatures to which they can adapt without being severely stressed. Normal newborn temperature is 97.7 to 99.5FAx or 99.7R. Newborn Factors that limit newborns thermal regulatory ability: 1. 2 3. Thermal Neutral Zone - range of environmental temperatures in which the individual can maintain a normal internal temperature with minimal metabolism and oxygen consumption for heat production. (Environmental range for normal newborn: 89.6oF to 93.2oF; Size and age also affect the TNZ) Below this range (Critical temperature), there is increased metabolism and oxygen consumption for heat production. Heat loss from the body surface to the environment takes place by four mechanisms: (1) Convection (2) Radiation 4 (3) Evaporation (4) Conduction Newborn Heat Production (Thermogenesis) Several sources of heat production (thermogenesis) are available muscular activity, positional changes, vasomotor control, and chemical thermogenesis (same as nonshivering thermogenesis) Nonshivering thermogenesis Unique to the newborn and uses the newborn’s stores of brown adipose tissue (BAT) also called brown fat. BAT is the primary source of heat in the cold stressed newborn. BAT is found in the midscapular area around the neck, in the trachea, esophagus, abdominal aorta, kidneys, and adrenal glands. Brown fat metabolism is activated when skin receptors perceive environmental temperature changes and transmit sensations to the central nervous system that stimulates the sympathetic nervous system. Cold Stress - excessive body heat loss resulting in compensatory mechanisms such as nonshivering neogenesis to maintain core body temperature In the cold stressed infant, oxygen consumption and energy are diverted from maintaining normal brain and cardiac function and growth to thermogenesis for survival! Neonatal Risks from Cold Stress Hypoglycemia: glucose consumption due to BMR hypoglycemia Respiratory acidosis: respiratory rate O2 consumption arterial O2 & p CO2 pH respiratory acidosis Metabolic acidosis: BMR anaerobic glycolysis production of acids metabolic acidosis 5 Increased risk of jaundice: Excessive fatty acids displace the bilirubin from the albumin binding sites risk of jaundice and kernicterus 1.5 Hepatic Adaptation Iron Storage: Carbohydrate Metabolism: Conjugation of Bilirubin: Bilirubin: Bilirubin conjugation - conversion of bilirubin from a fat soluble form (unconjugated bilirubin also called indirect bilirubin to a water soluble form (conjugated bilirubin also called direct bilirubin. Physiologic Jaundice – (Icterus Neonatorum or Physiologic Hyperbilirubinemia): A normal occurrence in 50% of full-term newborns because: 1. Newborn has a higher rate of bilirubin production due to large numbers of RBC’s and shorter survival time of fetal RBC’s. 2. The newborn’s small intestine reabsorbs a large amount of bilirubin. Criteria for Physiologic Jaundice: 1. The infant is otherwise well. 2. In full-term infants jaundice first appears after 24 hours and disappears by the end of the 7th day. 3. Serum unconjugated bilirubin concentration does not exceed 12 mg/dL 6 4. Hyperbilirubinemia is almost exclusively of the unconjugated (indirect) variety and conjugated bilirubin (direct) should not exceed 1.5 mg/dL. 5. Daily increments of bililrubin concentration should not exceed 5 mg/dl per day The appearance of jaundice during the first 24 hours of life or persisting beyond 7 days usually indicates a pathologic process. Kernicterus, a neurological syndrome that results from deposition of unconjugated bilirubin in the brain, is the most severe complication of neonatal hyperbilirubinemia. Survivors can have cerebral palsy, epilepsy, and mental retardation. Kernicterus usually does not occur in a term neonate until serum bilirubin levels 25 mg/dL are reached... Coagulation: . 1.6 Gastrointestinal Adaptation: Stools: The lower ileum empties rapidly so stools are frequent. The cardiac and pyloric sphincters are immature; therefore, frequent regurgitation (spitting) may occur. Initial stools: Breastfeed Infant Stools: Formula Fed Infant’s Stools: 1.7 Renal Adaptation: 1.8 Immunologic Adaptation: 7 Of the three major types of antibodies are IgG, IgA, and IgM, only IgG crosses the placenta. Maternal immunoglobulin is transferred primary during the 3rd trimester. Immunity acquired from the mother is passive acquired immunity and lasts an average of 3 months. IgM is produced by the fetus. Elevated levels at birth may indicate placental leaks or exposure to TORCH viruses. IgA appears to provide protection mainly on secreting surfaces such as the respiratory tract, GI tract, and eyes. Colostrum is very high in secretory IgA. 1.9 Neurologic and Sensory/Physical Adaptation Newborn’s brain is about 1/4 the size of an adult’s and myelination of nerve fibers is incomplete. Brain requires glucose and a relatively large supply of O2 for adequate metabolism. Partially flexed extremities, with the legs near the abdomen, is the usual position of the normal newborn. When awake, the newborn may exhibit purposeless, uncoordinated bilateral movements of the extremities. Cry of a newborn should be lusty and vigorous. Neonatal Reflexes: The normal infant has many primitive reflexes. The times at which these reflexes appear and disappear reflect maturity and intactness of the developing nervous system. Absences of reflexes may indicate central nervous system damage Moro reflex Palmer and plantar grasp Tonic neck Sucking and rooting Swallowing Babinski’s Stepping and walking Trunk incurvation (Galant's reflex) Traction /Head Lag Arm recoil Crawling (Bauer’s) 8 Sensory Capabilities: Habituation – the newborn’s ability to process and respond to complex visual and auditory stimulation. Orientation – the newborn’s ability to be alert, follow and fixate on complex visual stimuli that have a particular appeal and attraction. Self-quieting ability – the newborn’s ability to use resources to quiet and comfort himself/herself. Alertness States: Deep /Quiet Sleep: Light/Active Sleep: Drowsy: Quiet Alert: Active Alert: Crying: Newborn Physical and Gestational Age Assessment Factors that influence newborn assessment include maternal conditions such as PIH and diabetes, maternal analgesia and anesthesia during labor, length and response of newborn to labor, method of delivery, and complications of delivery. Initial Assessment and Care of the Newborn in the LDR/Delivery Room (1) First priority - maintain respiration. Suction initially with a bulb syringe. 9 APGAR SCORING: performed to rapidly assess the newborn's physiological status at birth and determines the support or resuscitation approaches that need to be implemented. based on 5 signs that indicate the physiological status Heart rate - based on auscultation or palpation at junction cord and skin. Respiratory rate - based on observed movement of chest wall Muscle tone - based on degree of flexion and resistance to straightening of the extremities and observation of activity level Reflex irritability- based on response to gentle flicking the soles of the feet or rubbing the back Skin color- based on observation. Assess for cyanosis and pallor. Expect most newborns to have acrocyanosis. Scoring is done: Apgar Scoring System SCORE 1 Slow (<100) Slow, weak cry SIGN Heart Rate Respiratory Rate Muscle Tone 0 Absent Absent Reflex Irritability Color No Cry Response Blue, pale Body pink, extremities Completely blue Pink Flaccid Some flexion of arms&legs Grimace 2 Over 100 Good cry Well flexed Give a score of 0 to 2 on each sign. Total score range is 0-10. Scores of 7-10 indicates an uncompromised newborn. Suction prn, provide and maintain warmth to support transitioning to extrauterine life. 10 Scores of 3-6 moderately depressed neonate who will need some resuscitation (blow by oxygen, stimulation, and close observation) Scores of 0, 1 or 2 indicate a severely compromised newborn who needs resuscitation (probably ventilatory assistance and intensive observation & care) (2) Second priority - provide and maintain warmth. 3. Brief physical assessment to determine if there are any gross physical abnormalities present. 4. Newborn identification: 5. Initiation of parent-infant attachment- Nursery Admission Assessment In some institutions all of the assessments described are completed in the LDR unit during the mother’s recovery period and the infant is transferred directly to the mother-baby unit with the mother. There is no separation of mother and infant and no required time in an admission nursery for uncompromised newborns. 1. Significant data to be collected upon admission to the nursery: Condition of the newborn- Labor and birth record (copy required for newborn’s chart). 11 Antepartal history- Parent-infant interaction- Parent desires 2 Admission Nursing Care Identification: Read aloud info on each ID bands as Nursery RN checks the ID form for accuracy. Vital signs- Initial temp usually rectal, then all others axillary. 97.698.6 is preferred range. Apical pulse and respiratory rate per protocol until stable. HR: 120-160, RR: 30-60. BP assessed in some institutions- use Doppler or Dinemapp. Average BP: 65-95/30-60. Weight - unclothed in both grams and pounds. Cover scales to prevent cross infection and heat loss from conduction. Avg. Wt.: 7 1/2 pounds; Normal Range: 5lbs-9lbs. Measure length, head, and chest in centimeters or inches per agency protocols. Length - Average: 50cm (20 in), Normal Range: 45 -55 cm (18-20 in) Head Circumference- Average: 33-35 cm (13-14 in) Chest Circumference - should be no greater than head circumference and is typically 1-2 cm less than head circumference. H & H and blood glucose according to agency protocol. Glucose usually done for SGA, LGA, infants of diabetic mothers, and for infants who appear jittery or who are hypothermic. Normal Hgb: 1424 g/dl Normal Hct: 48% - 69% Glucose: 40-60mg/dl 12 Vitamin K (Aquamephyton) injection and erythromycin ophthalmic ointment may be administered at this time or within a few hours of birth. 3. Physical and Gestational Age Assessment A complete physical assessment should be completed within two hours of birth. Some institutions complete a gestational age assessment on newborns. The nursing plan of care is based on these assessments. The newborn physical assessment and gestational age assessment videos will be shown during OB labs prior to beginning OB clinical. They are also on library reserve for student use in preparing for clinical and exams. Normal physical variations - not considered abnormalities: caput succedaneum- edematous swelling of the scalp and soft tissues; crosses suture lines. cephalohematoma- subperiosteal hemorrhage; confined to one bone, doesn’t cross suture lines. milia-small, white sebaceous cysts, usually on nose, chin or forehead. Mongolian spots-dark blue or purplish area usually over sacrum of darker skinned infants. telangiectatic nevi- “stork bites”, usually on forehead, back of head and neck. molding- asymmetry of skull bones due to birth process. nevus vasculosis - “strawberry mark” Epstein’s pearls - white, shiny cysts on gums or palate. overriding sutures- due to birth process. 4. Behavioral Assessment- 13 5 Periods of Reactivity The newborn shows a predictable pattern of behavior during the first several hours after birth First period of reactivity- Physiological behavior: rapid, shallow respirations and maybe transient chest retractions, flaring, and grunting. Heart rate - rapid and irregular. Bowel sounds usually absent. Sleep phase- Activity decreases. Second period of reactivity- Common Newborn Nursing Diagnoses and Interventions during the Immediate Newborn Period 1. Nursing Diagnosis: Ineffective Airway Clearance; Ineffective Breathing Pattern. Interventions: 2 Nursing Diagnosis: Ineffective Thermoregulation; Hypothermia; Impaired gas exchange r/t hypothermia; Alteration in peripheral tissue perfusion r/t hypothermia 14 Interventions: 3. Nursing Diagnosis: Potential for fluid volume deficit; Potential for alteration in tissue perfusion. Interventions: 4. Nursing Diagnosis: Risk for infection r/t colonization of eyes by neisseria gonorrhea or chlamydia trachomatis; Risk for infection r/t colonization of the umbilical cord with pathological microorganisms. Intervention: 5. Nursing Diagnosis: Nutrition, less than body requirements r/t hypoglycemia Interventions: 6. Nursing Diagnosis: Risk for fluid volume deficit r/t hemorrhage from umbilical cord Intervention: 7. Nursing Diagnosis: Potential for fluid volume deficit r/t inadequate fluid intake. Potential for nutrition, less than body requirements r/t inadequate intake Interventions: Ongoing Newborn Assessments however the following should be assessed at least daily while the baby is in the facility: 1. Vital signs15 2. Daily Weight- 3. Skin color- 4. I&O 5. Umbilical cord care- 6. Circumcision- Post Circumcision Care: 7. Pain- 8. Nutrition- 9. Parent Education- 10. Attachment- Daily Newborn Care 1. Common newborn nursing diagnoses: Ineffective airway clearance Hypothermia Impaired skin integrity Altered patterns of urinary elimination Constipation Risk for infection 16 Altered nutrition: less than body requirements Risk for pain Knowledge deficit (parents) Altered health maintenance Family coping: potential for growth Altered family process Altered parenting 2. Interventions: Maintenance of cardiopulmonary function- Always place infant on back when not being directly observed. Bulb syringe must always be within easy reach. If a newborn is found not breathing, the first action is to suction with a bulb syringe. If suctioning does not work, stimulate the infant by vigorous stroking of the spine. Maintenance of neutral thermal environment- Prevent heat loss by evaporation, conduction, radiation, and convection. Prevention of infection-cord care per protocol; keep diaper below the level of the cord. Remove clamp when cord is dry, usually after 24 hours. Note: No infected babies should be with well babies in the nursery. They must be isolated. Research does not support the need for cover gowns-hand washing is the most effective method to prevent infections in the nursery. Infection is difficult to diagnose in newborns: Symptoms include hypothermia; inactivity; poor feeding; jaundice; mottled skin; abdominal distention; full, bulging fontanel, high-pitched cry; and irritability Monitor nutritional intake: Newborns require 115cal/kg/day. Breastfeeding is the best nutrition for newborns and infants. Bottle-feeding- Numerous commercially prepared formulas available. All have the necessary 20 cal/oz. and come iron fortified, but none exactly replicate breast milk. Bottle-fed infants usually gain weight faster than breastfed infants and are more likely to have infant obesity. Allergic reactions to 17 formula are common due to the foreign proteins. Many infants must be placed on soy formula. Regurgitation is common after feeding- place infant on right side to aid drainage and facilitate gastric emptying. The nurse has a responsibility to support the feeding method decisions and help the family achieve a positive result. Positive bonds in parent-child relationships may be developed with either method. Circumcision care as described above. Bathing- Teach parents: Therapy for hyperbilirubinemia Prevention is best. Early and frequent feedings stimulate the GI tract and passage of meconium. Jaundice is usually treated when it reaches a level or 12 mg./100 ml Phototherapy (bili-lights) - Infant placed unclothed, except for diaper, in open crib under lights. Must wear eye patches to prevent damage to the retina. Turn infant every 2 hours to expose evenly to light. Monitor temperature carefully. Monitor light intensity with photometer. Infant will probably need extra fluid due to increased excretion and insensible water loss used. 18 Bililight alternative: Fiber-optic bili blanket-attached to a halogen light source and wrapped around baby’s trunk or placed under baby. Fluid and weight loss are not complications; often used for home therapy. Newborn screening programs Sensory enrichment Parent education- Topics to be included are: Bathing Symptoms of illness Cord care Normal elimination Circumcision care Safety-car seats Feeding Immunizations and follow-up care Position on back- “Back to Sleep” Normal Newborn Activity How to take temperature "NeoAssess&Care" Revised: 2/08 KH 19