General Care
Ian Laing
This chapter describes the general care of the well infant and discusses how a pediatrician may meet the needs of the majority of families whose infants do not require admission to a neonatal unit.
No pediatrician should act independently of midwives, neonatal nurses, obstetricians, fetal medicine specialists, radiologists, geneticists, and practitioners of many other disciplines. The pediatrician should be a member of a multidisciplinary group that meets weekly to discuss the anticipated antenatal problems and to provide an audit of outcomes from the previous months.
There are four phases of care:
Antenatal
Intrapartum
Neonatal
Postdischarge
ANTENATAL
The past 20 years have seen a revolution in the general public’s expectations regarding the standard of care received and the quality and extent of information provided. Midwives and obstetricians are not the only professionals responsible for providing this care and information. The pediatrician must work with these other professionals to ensure the clarity and accuracy of information provided antenatally to mothers and their partners. The team must also grapple with the legal and ethical aspects of “informed consent.” Wherever possible, all professionals should strive toward evidence-based medicine. The concept of risk is not yet well understood by the general population.
Information
The developed world has now emerged from the days when underinformed patients conveyed their decisions to professionals. The patient-professional partnership is now crucial. Information should be given to mother and partner as fully as possible, in verbal and written form. Such information should maintain perspective, while being spoken or written in language that the patient can understand.
Risk
Today our communities strive toward “natural” childbirth, emphasizing that birth should ideally be a normal physiologic phenomenon for a healthy woman and fetus. Nevertheless, even the healthiest pregnancy carries a small risk of maternal mortality and a significant risk of morbidity. For the fetus and neonate the risks are much higher: The perinatal mortality is usually between 6 and 10 deaths per 1,000 total deliveries in the developed world. The anticipated risk may change. New possibilities may emerge unexpectedly. Unforeseen emergencies occur without time to discuss them completely. Further-more, some pregnancies may appear to cause initial concern, and such worries may resolve as the pregnancy progresses. The clinician must address the question of whether the mother should be told of all possibilities, even those that may occur once in 500 events. In striving to do so, there is a chance that all perspective may be lost for the patient. A value judgment must be taken in each individual case. This risk, however great or small, is communicated to mother and a plan is chosen accordingly. Written information should capture the idea that the plan may have to change in light of forthcoming events.
Because labor is usually a tiring process for the mother, it is not an ideal time to discuss options that could be better addressed beforehand. Mode of feeding, vitamin K prophylaxis, and immunization schedules are examples of subjects that should be explored in depth before the mother enters labor.
Informed Consent
In theory, there should be “fully informed consent at all times.” This is an important goal, but it is not entirely achievable. Pregnancy, labor, delivery, and the neonatal period are all times when unexpected events may arise. Anticipating them all is impossible and would be detrimental to the perspective that a woman and her partner require. Fully informed consent can be aimed at exploring all likely events and their outcomes, test findings, including the implications of false-positive and false-negative results, and
the concept of changing risk. These goals are commendable, very time-consuming, and potentially bewildering, even for educated parents. Compromises therefore must be embraced. Professionals should obtain written informed consent where possible, and those who administer, manage, and finance the health program must recognize that the informed consent procedure is time-consuming and requires increased staff resources.
the concept of changing risk. These goals are commendable, very time-consuming, and potentially bewildering, even for educated parents. Compromises therefore must be embraced. Professionals should obtain written informed consent where possible, and those who administer, manage, and finance the health program must recognize that the informed consent procedure is time-consuming and requires increased staff resources.
Infant Feeding Information
There is great variation throughout the world in rates of breast-feeding. This variation is largely cultural in origin. Some parts of the developed world, including Europe, the United States, and Canada, have low rates of breast-feeding and physicians are required to provide mothers with clear information about the proven advantages of breast-feeding. Advantages include lower prevalence of maternal breast cancer, lower incidence of infant infections (1) (including necrotizing enterocolitis), lower prevalence of obesity in childhood (2), and lower incidence of sudden infant death syndrome (SIDS) (3,4). Breast-feeding may also provide some protection against allergic disease in childhood.
Vitamin K Information
Hemorrhagic disease of the newborn (HDN) can cause significant neonatal morbidity and mortality. It may present in the early days of neonatal life as bleeding from the umbilicus, skin, or as intestinal hemorrhage. Late-onset HDN may cause intracranial bleeding, with consequent death or brain damage. Infants who are breast-feeding or born of mothers taking anticonvulsants are at particular risk (5). Because of these hazards, all parents should be advised to choose vitamin K prophylaxis for their newborn infants. One intramuscular dose of vitamin K can prevent almost all episodes of HDN. This is a simple and reliable method of prophylaxis. Some reports suggest that there is an increased incidence of childhood malignancy after intramuscular vitamin K prophylaxis, whereas other studies fail to confirm this.
Oral prophylaxis may be given on days 1, 8, and 28, and is effective at dramatically reducing the incidence of HDN (6). Oral prophylaxis requires a motivated parent to remember to administer the second and third dose, or else an efficient community support program must be in place to ensure that the infant is similarly protected.
TABLE 20-1 IMMUNIZATION SCHEDULE | ||||||||||||
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Written information should be available for all parents to examine the evidence, and professionals should be available to discuss the issues and provide parents with a recommendation. Anxieties expressed in the literature, whether justified or not, should not lead parents to reject vitamin K prophylaxis altogether. HDN is a potentially lethal condition.
Immunization Information
Throughout the world there are differences in immunization programs. These depend on varying risks of disease in different parts of the planet, availability of vaccines and ability to refrigerate them, and community education programs. Preterm infants should be immunized at the same postnatal age as their term counterparts. Provided the infant is clinically well, the timing of immunization should be unaffected by gestation. Table 20-1 shows an example of recommended immunization schedules in the developed world. Because each country has its own schedule, the pediatrician should check both the local and current recommendations.
INTRAPARTUM
Ideally the pediatrician attending the delivery of a newborn infant has full information available. The reality is often different. An urgent call to a labor suite is followed gradually by an unfolding history. The pediatrician relies on close observation of the neonate to guide emergency care while the history is gathered.
Information from case records should include the following:
Maternal health: Diseases prior to and during the pregnancy are documented; these include diabetes mellitus and positive human immunodeficiency virus (HIV) status. In addition, there should be an account of diseases associated with the pregnancy, such as pregnancy-induced hypertension and gestational diabetes.
Prescribed drugs during pregnancy: Some therapeutic drugs may have significant effects on the fetus and neonate (see Chapter 15).
Drug abuse: A mother may be a chronic drug abuser. Frequently this involves a cocktail of drugs, only some of which are known by professionals. The chronic drug abuser may be a caring mother with feelings of guilt and sincere intentions of creating a healthy environment for the new baby. The mother however, may have a chaotic lifestyle, and there might also be coincident malnutrition, heavy smoking, alcoholism, and positive HIV status.
Fetal growth and apparent well-being, including all tests of fetal assessment: These may involve fetal ultrasonography scans for structural anomalies and nuchal translucency. Data from amniocentesis or chorionic villus sampling may be available. Doppler studies of uterine arteries may have been used to predict preeclampsia and fetal growth retardation. Umbilical arterial Doppler studies may have predicted placental damage and vascular occlusion. Doppler studies of fetal arteries and veins can also be used to assess fetal hypoxemia. Biophysical profile scoring involves cardiotocography, amniotic fluid volume, and three dynamic ultrasonography variables (fetal movement, fetal breathing, and fetal tone). Chapter 12 includes a detailed discussion of these techniques.
Gestation: It is important to know the best estimate of gestation and how this was calculated. An ultrasonography examination in the first trimester is accurate to within ±2 to 3.5 days. The mother’s history of the first day of the last menstrual period may be helpful but is not always available. Remember too that a mother may experience a menstrual period even after conception has taken place, and in these circumstances an early ultrasonography scan may correctly declare that the pregnancy is 4 weeks further advanced than the mother’s history would suggest.
Date and time of rupture of membranes: The definition of prolonged rupture of the amniotic membranes is not consistent and is variously described as 12, 18, 24, 48, and 72 hours. It is associated with chorioamnionitis and an increased risk of fetal and neonatal infection.
Events during labor: Assessment of fetal well-being including cardiotocography, passage of meconium, maternal pyrexia, and the results of any fetal scalp pH measurements may guide the resuscitation. The combination of profound fetal acidosis and neonatal apnea requires the presence of an experienced pediatric team that can begin immediate assisted ventilation.
Mode of delivery: Resuscitation of the infant in the room where mother has labored allows the pediatrician to learn firsthand about the ease or difficulty of delivery. Forceps or ventouse (vacuum) deliveries may account for local trauma observed.
NEONATAL
Chapter 18 describes resuscitation of the neonate in detail.
The transformation from fetus to neonate is a remarkable one. The placenta, which until this point has been the provider of food and oxygen and the remover of fetal waste products, is clamped off and the neonate must immediately adapt to take responsibility for these functions. Collapsed, liquid-filled lungs become inflated within seconds, and the capillaries and lymphatics drain most of the pulmonary fluid in a few hours. The fetal partial pressure of arterial oxygen (PaO2) changes from 32 mm Hg to 80 mm Hg in minutes and achieves 100 mm Hg in a few days. Approximately 95% of infants establish spontaneous respiration by 1 minute after delivery and thereafter become pink and vigorous spontaneously. The purpose of resuscitation is to intervene when these natural processes are disturbed pathologically. Dr. Virginia Apgar’s scoring system for assessment of the neonate at 1 and 5 minutes is still used widely today, but the pediatrician should concentrate on assisting the infant to achieve a heart rate greater than 100 per minute and active, crying respirations. In the absence of congenital abnormalities, central pinkness is soon achieved thereafter.
General Principles of Resuscitation
The following principles are guides to the general care of the newborn in the early minutes of life:
Resuscitation in the delivery room can be readily described to parents while it is happening. Parents fear silences.
Identification anklets or wristbands are important, but not at the expense of causing a tiny infant to become cold.
The loudly crying baby never needs to be intubated or to be given bag-and-mask insufflation. Enrichment of the inspired gas may be required but never under positive pressure. The infant is more efficient than the clinician.
Do not ever sound frustrated or critical of colleagues during resuscitations. Such sentiments result in a breakdown of essential teamwork and sap the confidence of parents.
Meconium
The contents of the fetal bowel may have been passed prematurely and may have been inhaled during asphyxial gasping prior to delivery. Meconium is a chemical irritant to the lungs as well as a marker of fetal distress. In 9% to 11% of deliveries, meconium is present. The caregiver should thoroughly suction any meconium from the mouth and nares with the head on the perineum. Whether or not meconium should be aspirated from the newborn’s oropharynx is controversial (7); the current author is in favor of this practice, but recognizes that more data are required to support or refute this maneuver. It is clear that those infants who are vigorous do not require invasive care. Those who are in poor condition should be intubated and any inhaled meconium aspirated from the trachea.
Cord Clamping
Data are currently being gathered about the ideal time of cord clamping and whether the infant should be held for a
few seconds below the placenta in order to receive a gravitational transfusion (8). Consequences of receiving too much blood volume are fluid overload, polycythemia, and (later) hyperbilirubinemia. Until the data from research studies are complete, it may be reasonable to allow a 15-second delay to achieve a modest blood transfusion. Because delayed clamping of the cord increases the infant’s blood volume, it may be advantageous in extreme preterm infants to ensure an adequate intravascular volume, and perhaps to decrease the necessity for subsequent blood transfusion. There is no place for “stripping” of the cord by “milking” the blood from placenta to baby. The cord should initially be clamped several centimeters from the umbilicus and then be cut (9). Then the cord should be clamped 1 or 2 cm from the umbilicus using a disposable clamp, and cut with sterile scissors distal to the clamp. The cord clamp can be safely removed during the second day of life, at which time the cord should be inspected to insure that there is no residual hemorrhage.
few seconds below the placenta in order to receive a gravitational transfusion (8). Consequences of receiving too much blood volume are fluid overload, polycythemia, and (later) hyperbilirubinemia. Until the data from research studies are complete, it may be reasonable to allow a 15-second delay to achieve a modest blood transfusion. Because delayed clamping of the cord increases the infant’s blood volume, it may be advantageous in extreme preterm infants to ensure an adequate intravascular volume, and perhaps to decrease the necessity for subsequent blood transfusion. There is no place for “stripping” of the cord by “milking” the blood from placenta to baby. The cord should initially be clamped several centimeters from the umbilicus and then be cut (9). Then the cord should be clamped 1 or 2 cm from the umbilicus using a disposable clamp, and cut with sterile scissors distal to the clamp. The cord clamp can be safely removed during the second day of life, at which time the cord should be inspected to insure that there is no residual hemorrhage.
Drying
The neonate is delivered covered in amniotic fluid that immediately extracts latent heat by evaporation from the infant’s body. Consequently, most infants should be thoroughly dried with warm towels.
Temperature Control
Newborn infants lose heat by four physical mechanisms: evaporation, conduction, convection, and radiation. Evaporation is at its most important in the early seconds of life when the newborn is covered in amniotic fluid. Conduction in general contributes little to heat loss because the infant is in contact with warm garments of low conductivity. Convection losses become important when a child is exposed to drafts, and most especially when a child is being nursed naked on an open radiant warmer. Radiant heat loss occurs to cold surrounding objects, that is, the incubator wall in a cool room. Recognition of these physical principles allows heat loss to be minimized by early drying, warm clothing, freedom from drafts, and ensuring that incubators are double-walled with warm gas between the walls. Physical examination, weighing, and bathing of the infant should always be carried out in a warm environment. The neonatal unit and postnatal wards should audit the incidence of neonatal hypothermia and identify the sources of baby cooling. The areas or procedures at fault should be corrected and the quality of care surveyed prospectively.
Identification
Before leaving the delivery room, every infant should be identified by the fixing of a wristband and anklet; the parent(s) should witness the bands being attached. In addition, many institutions now routinely do footprinting, handprinting, and fingerprinting, although it is not yet clear that this is reliable and worthwhile (10).
Security
Because of sporadic baby abductions in maternity units, each unit should have a written policy to protect the infants. Both antenatally and postnatally, parents should be given instructions to maximize the safety of the infant. Parents and staff must verify the identity of anyone requesting to remove the baby from the room. Parents should be encouraged, when in any doubt, to summon another member of the staff to check the identification of the person asking to take the child.
Bonding
The early minutes and hours of a child’s life are important times for establishing a close bond between mother and infant. After the majority of deliveries it should be possible to put the infant immediately to the maternal breast for close physical contact even if the mother does not intend to breast-feed.
Control of Infection
Even today infection is one of the major causes of mortality and morbidity in newborn infants. Gowning does not decrease bacterial colonization of the baby nor the incidence of neonatal sepsis (11). The maternity service, in all its departments, must have high-quality handwashing facilities. The troughs should be large with elbow-operated, knee-operated, or automatic taps that produce warm water. Soap must be plentiful. Alcohol rubs should be readily available wherever infants are cared for. Staff should be free of all clothes and jewelry from elbows to fingertips. Each institution should have regular (at least annual) education sessions for staff, and a culture of nonthreatening criticism by peers should be ever-present. All staff on entering a nursery must wash their hands and forearms with an antiseptic (e.g., chlorhexidine or hexachlorophene). Before and after touching each baby, staff should douse hands and forearms in at least 5 mL of alcohol rub or thoroughly wash their hands (12).
Eye Prophylaxis
Throughout the developed world there is great variation in the use of eye prophylaxis. Each individual community should make a risk assessment depending on the incidence of identified Chlamydia and gonococcal infections. Erythromycin 0.5% and tetracycline 1% are effective antibiotics against sensitive gonococci, but penicillinase-producing gonococci are increasing in numbers and are best prevented with silver nitrate 1% (13).
If prophylaxis is to be given, the ointments should be instilled within the first hour of life into the lower conjunctival sac. The lids are then gently massaged. It is difficult to produce effective prophylaxis against Chlamydia. If conjunctivitis is identified, scrapings of the tarsal conjunctiva should be sent to the laboratory to identify typical cytoplasmic inclusion bodies. Treatment with combined
oral and topical erythromycin has the advantage of eradication of nasopharyngeal carriage of Chlamydia. Equally, if the mother is known to have gonococcal disease, prophylaxis with ointments is insufficient for the infant, who should be fully treated with parenteral antibiotics (13).
oral and topical erythromycin has the advantage of eradication of nasopharyngeal carriage of Chlamydia. Equally, if the mother is known to have gonococcal disease, prophylaxis with ointments is insufficient for the infant, who should be fully treated with parenteral antibiotics (13).