Infants born with critical congenital heart disease (cCHD) are the most fragile subset of patients with CHD because they require open heart surgery in the newborn period to be able to survive. These infants are at 3 to 4 times the risk for developing learning disabilities, behavioral problems, mental health problems, and other developmental deficits or delays compared with children with structurally normal hearts.1–6 Much focus has been given by researchers and clinicians on describing and mitigating these challenges in this at-risk population.7 Although the causes are clearly multifaceted, little attention has been given to the early care needs during the fragile newborn period. Infants born with cCHD are often hospitalized in a mixed pediatric intensive care unit or a dedicated cardiac intensive care unit (CICU). For the purposes of this article, we will use “CICU” throughout. The developing infant brain needs closeness with its mother and family, including voice and affect regulation with family members to support security and trust, which are greatly reduced in the CICU.8 However, necessary care in the CICU exposes infants to overwhelming stress through a myriad of noxious stimuli, including painful procedures, invasive lines and tubes, and intense sensory stimulation. Bonding and attachment between parent and infant are disrupted. Mobility is limited. Neurotoxic medications are required to reduce pain and agitation. The combination of these negative experiences disrupts the infant's synaptogenesis, brain maturation, and neurodevelopment.9 The CICU environment creates a misalignment between what the developing brain needs and what the environment provides, impacting both short- and long-term neurodevelopment.
Current research advocates for the integration of Individualized Family-centered Developmental Care (IFDC) into CICU care.9,10 It is a model of care that minimizes the mismatch between infant neurobiological needs and the CICU environment, thus diminishing the frequency and/or severity of adverse effects on the high-risk infant. Core components of IFDC include parent engagement, cue-based care, and the provision of a supportive environment. Many positive outcomes of IFDC have been demonstrated.11–13 Individualized Family-centered Developmental Care originally evolved from the Neonatal Individualized Developmental Care and Assessment Program, which demonstrated positive outcomes for premature infants including enhanced brain structure and function, along with improved behavioral outcomes into school age.14 In addition, medical benefits have been reported such as decreased length of ICU and hospital stays, earlier oral feeding, and increased weight gain,12–17 along with parental engagement, parent attachment to their infant, and parental confidence in caregiving.18–22
Individualized Family-centered Developmental Care has been integrated into neonatal intensive care units but only recently surfaced for CICUs.23–29 Currently, the use of IFDC in CICUs is variable; many centers report difficulty in implementation due to the perceived acuity of patients and lack of staff education.24 One contributing explanation may be that there is sparse literature describing the challenges of infants with cCHD during the neonatal period. Furthermore, most literature on IFDC is focused on the premature infant in the neonatal intensive care units and arises from a maturation perspective, where developmental supports are focused on enhancing development and promoting growth outside the womb for the infant born early. Most infants with cCHD, however, are born near- or full-term and struggle with recovery after cardiac surgery, along with challenges in growth and development. Although there are some similarities, we believe that the infant with cCHD in the CICU is fundamentally different from the premature infant in the neonatal intensive care units, requiring an approach to care that includes both an understanding of neurodevelopmental maturation and cardiac-specific recovery requirements. We propose that these unique characteristics create barriers and challenges for staff to fully integrate IFDC into CICUs. We believe that a synthesis of the literature regarding the behavioral and developmental profile of infants with cCHD will provide guidance to nurses and healthcare professionals in the CICU to understand the behavioral profile of the infant with cCHD and to successfully apply IFDC into practice. The purpose of this article is to (1) clearly describe the uniqueness of the infant with cCHD, including the medical, neurological, and parental challenges, and (2) propose methods to apply IFDC to support recovery of infants with cCHD in the CICU.
Unique Considerations for the Infant With Critical Congenital Heart Disease
Infants with cCHD show some similarities to other hospitalized newborns; however, they also have their own unique behavioral profile with specific medical, neurological, and parental challenges (see Figure).25,30,31
Infants with cCHD require frequent monitoring of physiological parameters including evaluation of heart rate and rhythm, blood pressure, central filling pressures, perfusion, volume status, urine output, and temperature regulation.32 Many are physiologically fragile, with minimal reserve to adapt to stressors in the environment. Routine nursing is a source of stress, impacting both sleep and pain. Sleep, which is essential for synapse formation and memory facilitation, becomes frequently disrupted.33,34 Painful experiences during early development shape the overall pain system and determine the final architecture of the adult brain.35 Pain must be monitored and managed, particularly after surgery, often requiring pharmacologic intervention, which places infants at an increased risk for adverse effects of excessive sedation, respiratory depression, withdrawal, and diminished responsivity to caregivers and parents.36 Furthermore, infants are at risk for a myriad of consequences of open heart surgery, including hemodynamic instability, persistent hypoxemia, infection, dysrhythmias, cardiac arrest, seizures, cardiovascular collapse requiring extracorporeal membrane oxygenation, and a prolonged length of stay.
Critical CHD is frequently associated with “congenital brain disease,” given the known prenatal and postnatal insults to brain development.37,38 Up to 50% of infants with cCHD are at risk for neurodevelopmental impairments.39 Brain injury may occur during intrauterine life and before cardiac surgery.22,40 Studies have shown that infants with cCHD present with higher rates of microcephaly, brain immaturity, and white matter injury at birth.37 Prenatal programming of the infant may also occur as a result of maternal stress during pregnancy, which has been shown in other populations to increase the risk for neurodevelopmental sequelae.41 Later, acquired neurologic injury may arise from the adverse effects of anesthetics, cardiopulmonary bypass, sedation, analgesia, hypoxia, seizures, or stroke.1,42
Delays in neurodevelopment can appear early in infancy and present as atypical autonomic, state, and motor organization, as well as feeding dysfunction.43 Infants with cCHD are easily overwhelmed by social and sensory stimulation, are difficult to console, and have poor visual orienting.44–46 Motor challenges can occur related to neurologic injury, including hypotonia/hypertonia, asymmetry of movement, and general gross motor delays.5,30,43,47,48 Infants also often demonstrate weak sucking and few feeding readiness cues. Feeding difficulties, coupled with symptoms of congestive heart failure, frequently lead to tube feeding, delayed oral feeding, and poor weight gain and growth.49–51 The etiology of feeding dysfunction is multifactorial and often related to the hemodynamic status of the infant and, in some, injury to the recurrent laryngeal nerve, phrenic nerve, and thoracic duct as a consequence of surgery near the aortic arch or left pulmonary artery. Additional factors influencing feeding dysfunction may include fatigue, increased respiratory rate, sedation levels, neurologic status, vocal cord dysfunction, and dysphasia. Neurologic insult may also contribute to poor feeding organization in this population.52
Parents of infants born with cCHD experience high stress from the time of infant diagnosis through the subsequent hospitalization(s) for cardiac surgery and beyond. Infants may be immediately separated from their parents after birth, causing an alteration in the normal attachment process.53 Parents are often unable to feed, hold, care, and, at times, even touch their critically ill infant, creating a sense of altered parental role.54,55 Mothers, in particular, experience heightened stress, anxiety, and depression.56–61 Parental stress influences the parent's quality of life, mental health, and overall family functioning.62 Parental stress impacts the child's overall development, and research is emerging that maternal mental health has more significant influence on child behavioral outcomes than the physiologic impact of the cCHD.63
Applying Individualized Family-centered Developmental Care to Support Recovery in the Cardiac Intensive Care Unit
The challenge for nurses and other medical professionals in the CICU is to apply IFDC. We propose the application of IFDC in the CICU by including considerations for the infant's postoperative recovery needs (Table 1). Unlike the premature infant who spends weeks and months in the neonatal intensive care units working on feeding and growth (maturation), most infants with cCHD may spend only days to weeks in the CICU yet undergo an overwhelmingly stressful open heart surgery, requiring invasive medical and surgical care and constant attention to their physiology to be able to survive (recovery). It is important to note that approximately 20% of infants with cCHD have hospital lengths of stay of 2 months or greater; therefore, individualizing care based on their changing developmental needs is paramount.64,65 Regardless of the length of stay, all fragile infants benefit from the IFDC approach to care. Optimal outcomes will occur when the healthcare team focuses on both physiology and infant behavior, to adjust caregiving practices and the physical and emotional environment to support the developmental needs of the infant. Individualized Family-centered Developmental Care requires a shift in the critical care paradigm to include the evaluation of the infant's behavior and building a relationship between caregiver, infant, and family.
To the developing brain, all experience matters, both positive and negative; thus, each interaction shapes neural connections and long-term brain maturation. Individualized Family-centered Developmental Care provides the essential framework for nurses to support the vulnerable developing brain while maintaining the medical stability of the recovering infant after cardiac surgery. To provide this care, nurses must add to the medical and task-oriented model of caregiving to include a relationship-based model of care where the infant is recognized as an individual who is communicating and interacting with the environment. All care must be regarded as “engaging with” the infant rather than “doing to” or “doing for.”66 An understanding of infant communication should occur to properly individualize caregiving to meet the expectations of the infant's susceptible brain. Caregivers and parents should be engaged in continuous assessment of the infant, responding to the infant's behavioral cues and providing a supportive environment.67
Nurses in the CICU are already acutely attuned to assessing the physiological status of the infant, but behavioral assessment should be included into care as well. In current practice, most nurses begin caregiving with a physical assessment of the patient, then creation of a plan of care, implementation of the plan, and reevaluation of the patient. Behavioral assessment should be integrated as the first step into IFDC implementation to guide the plan of care. Reading infant behavior is key to promote individualization of care and inform nursing interventions at the point of care.
Infant behavior is composed of 4 subsystems of functioning: autonomic, motor, state, and self-regulation. These systems exist simultaneously and mutually influence each other, occurring in continuous interaction with the environment.68 The infant with cCHD is physiologically vulnerable, and this instability is seen in all systems of functioning, such as poor coloring, low motor tone, prolonged metabolism of sedative medications and withdrawal, limited alertness, and poor self-regulation. Reading infant behavior is similar to learning any language, requiring education and practice. Even very fragile infants display reliably observable behaviors in the form of autonomic and visceral responses, movement patterns, level of alertness of state, and self-regulation.68,69 Medical providers can assess each subsystem while performing the standard head-to-toe body system assessment (Table 2). Infant behaviors can be categorized as organized when the infant is well regulated and disorganized when the infant has difficulty adapting to internal or external stimuli.70,71 Parent engagement is essential because they are the infant's stable, familiar, predictable, and primary caregivers. Therefore, parents must also be educated on how to read and respond to infant behaviors and to discern when the infant is organized versus disorganized.
Supporting Organization by Applying Individualized Family-centered Developmental Care Interventions in the Cardiac Intensive Care Unit
Autonomic. Autonomic assessment in an infant with cCHD may be challenging as skin color is often atypical at baseline and sedative medications, as well as excessive stimulation, can cause abnormal movements. Nurses must consider other sources of autonomic instability, including pain, temperature instability, hemodynamic instability, atypical seizures, or withdrawal from analgesic or sedative mediations. The provision of calming techniques during and after caregiving, such as offering a pacifier, swaddling, or gentle touch, has been shown to increase physiologic stability.72 Another alternative is offering 2-person care to fragile infants, where the nurse provides a medical intervention and a parent, therapist, or second nurse supports the infant. Parents should be given a key role in the CICU and encouraged to provide these forms of nonpharmacologic comfort measures. It is important to consider thermoregulation and the need for clothing and blankets when the infant is held or in the open environment. Partial swaddling during caregiving is helpful. For example, during a diaper change, the upper extremities and chest can be maintained swaddled in a blanket. A particularly vulnerable time for temperature instability is when the infant is transitioning out of an artificial heat source such as a warmer bed or an incubator.
Motor. Supporting the motor system may be challenging for postsurgical infants who must remain supine given medical risks, including sternotomy and delayed sternal closure, transthoracic intracardiac catheters, and chest tubes. These medically necessary limitations present a challenge to creating a position supportive of the infant's motor system. Postoperative infants often have low tone and need assistance to round their hips and shoulders forward and bring their hands and knees to midline. Small blanket rolls or positioning devices under both sides of the shoulders and hips are necessary, especially for the child who is sedated and paralyzed. Positioning devices should prevent hyperextension of the neck. If hyperextension of the neck is required to maintain an open airway for long periods, reintubation should be considered. Positioning devices should support flexion of the hips and knees toward midline, minimizing outward extension (“frog legs”), as often occurs in the immediate postoperative period. Supportive positions, such as prone in a well-tucked position on the parent's chest, are ideal and should be a goal for the infant with cCHD before and after surgery. In addition to holding, parents should be encouraged to support flexion and containment with their hands, also known as facilitated tucking.
State Regulation and Self-regulation. Postsurgical analgesia and sedation, along with a compromised autonomic system, create challenges for infants to attain a quiet alert state. Caregiving interventions to support state regulation include remaining in-tune with the infant's cues, providing breaks as needed by bundling care with pacing, and maintaining contact with the infant so that stimulation is not continually coming and going. If the infant is overwhelmed or stressed, nurses can modify caregiving to provide support for the infant. Environmental interventions such as minimizing sound, regulating light, and promoting sleep provide additional stress relief to the infant and support self-regulation. Televisions should not be used as a state regulator for infants, rather, supportive holding, swaddling, and a soft voice to promote quiet alertness. Sound machines, lullabies, soft music, and musical crib toys should be used sparingly because these often are overwhelming to the recovering infant and also add to the overall noise level in the room. Preferably, lower the sound level in the CICU rather than cover up the noise with more sound. Parents can read or sing to their infants or provide recordings of their voices if they are unable to be present at the bedside. Nurses can provide cycled lighting to promote infant circadian rhythm development, allowing low, indirect light during the day when awake and darkness at night. Care in the CICU will inevitably require bright light at times; however, infants' eyes should be protected from the light with a dark cloth or a hand, even during periods of sedation. Excessive noise and light also disrupt sleep, which is critical in the newborn period. Sleep disturbances impact cognition, attentional, and psychosocial development.73
Supporting Family-centered Care
The CICU team is uniquely positioned to enhance parental role and support attachment and bonding between infants and parents. Even when the infant is critically ill, parents should be viewed as the infant's primary caregiver and participate in care and decision making. Parents can and should be integrated into care, regardless of the infant's medical fragility. For the most fragile infant, parent engagement might include assisting the nurse in routine care such as mouth care, diaper changing, positioning, touching, or providing facilitated tucking. Evidence is overwhelming in infant literature that holding and touch stabilizes the most fragile infants.74–77 When holding is not possible, alternative types of nurturing touch can be used, such as supporting the parent to cradle the infant in the crib. As infants recover, parental engagement can be expanded to include all aspects of care, including feeding, comforting, and holding the infant to support parent's active participation in the care of their infant. The preferred method of holding for parents is skin-to-skin contact, also known as kangaroo care. Skin-to-skin contact protects infants from nosocomial infection, supports growth, and promotes temperature stability for infants requiring an artificial heat source in the preoperative or postoperative period.78–80
Conclusions and Implications
Infants with cCHD have an increased risk for abnormal neurodevelopment. The experiences in the CICU shape the developing brain and alter recovery and healing, thus adversely impacting development. Individualized Family-centered Developmental Care is a promising model of care that nurses can integrate into the CICU to promote neuroprotection and development. Nurses can effectively integrate IFDC into the CICU by understanding the unique characteristics of infants with cCHD and applying IFDC interventions that include both maturity and recovery perspectives.
We have presented some examples of clinical interventions that can be incorporated into the care of infants with cCHD in the CICU using IFDC; however, many research implications also exist. Specific IFDC interventions should be studied to understand their impact on infants with cCHD, such as cycled lighting, holding and positive touch, or the use of nonpharmacologic comfort interventions. Future research should examine both short- and long-term outcomes of IFCD on infant neurodevelopment. Instrument development for the measurement of developmental care in the CICU, which accounts for the infant's medical fragility, would be beneficial to enable researchers to examine both the individual and unit level variables of IFDC. Finally, studies should examine the impact of parent engagement and participation in care on infant developmental outcomes, as well as family outcomes such as parent stress, parent-infant attachment, or family functioning.
What's New and Important
- Infants with cCHD are exposed to overwhelming stress in the CICU, which can result in increased pain, physiologic instability, behavioral disorganization, challenges to attachment, and altered brain development.
- The infant with cCHD is unique from the premature infant, requiring an approach to care of IFDC that includes both maturation and cardiac-specific recovery perspectives.
- Reading infant behavioral cues allows nurses, caregivers, and parents to assess infant needs at a specific point in time and respond with IFDC interventions that promote short- and long-term neurodevelopment.
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