Developmental patterns of physiological response to a multisensory intervention in extremely premature and high-risk infants.

OBJECTIVE: To compare the developmental patterns of heart rate (HR), respiratory rate (RR), and hemoglobin oxygen saturation (SaO2) of premature infants with and without central nervous system (CNS) injury, and evaluate whether a multisensory intervention altered this development. SAMPLE: Thirty-seven premature infants born at 23-26 weeks with normal head ultrasounds or at 24-32 weeks and diagnosed with periventricular leukomalacia (PVL) and/or intraventricular hemorrhage (IVH) were studied at 33-35 weeks postconceptional age. DESIGN: Infants were randomly assigned to control and experimental groups. The experimental group infants received auditory, tactile, visual, and vestibular (ATVV) multisensory intervention twice daily from 33 weeks postconceptional age (PCA) until hospital discharge. MAIN OUTCOME MEASURES: HR, RR, and SaO2 were continuously monitored during baseline, intervention, and the 30-minute postintervention period. RESULTS: Between 33 and 35 weeks PCA, control group infants with and without CNS injury and experimental group infants without CNS injury had a significant decrease in resting mean HR, whereas RR and SaO2 remained stable. The infants with PVL who received the intervention showed increases in HR even at rest. CONCLUSIONS: The absence of a weekly decline in HR for experimental group infants with PVL suggests that PVL may affect maturation of the autonomic nervous system and increase risk of decelerative HR changes and associated clinical compromise. Infants diagnosed with PVL should be closely monitored during procedures or interventions that may be stressful or involve handling. Further research is needed to tailor multisensory interventions for infants with PVL.

Periventricular leukomalacia: pathophysiological concerns due to immature development of the brain.

Periventricular leukomalacia (PVL) is a result of injury and necrosis of myelinated fibers around the lateral ventricles. PVL is now considered the principal form of brain injury in preterm infants. This injury can have long-term effects on physical, motor, sensory, cognitive, and social development. Some proposed pharmacological treatments being considered to aid in prevention of this injury are raising concerns because they have failed to show evidence of efficacy or have potential for deleterious long-term effects. Current treatment is aimed at injury prevention; therefore, nurses play a critical role. Awareness of the pathophysiologic concerns about preterm neonates can help nurses focus their assessments to identify patients at risk.

Gently caring: supporting the first few critical hours of life for the extremely low birth weight infant.

Caring for the extremely low birth weight infant in the first days of life is complex and challenging, yet rewarding. It is the experienced health care provider who will be best prepared to meet the needs of these fragile infants and their concerned/frightened parents. Understanding how to minimize stress and support body functions will enable us to better care for these infants in the first few days of life. We should strive to partner with parents, even in the resuscitative and stabilization phases of care, particularly when an infant may not survive. Nursing plays an essential role in providing this minute-to-minute support. It is not always what we do, but how we do it, that may matter most.

Periventricular leukomalacia.

Serial ultrasound examinations in the preterm infant have documented a strong predictive relationship between PVL and adverse neurologic sequelae, particularly cerebral palsy. Good obstetric management with carefully timed intervention as well as prevention of hypoxic-ischemic episodes postnatally may prevent PVL. The nurse plays a significant role in preventing PVL in the preterm infant. She should understand the risk factors associated with PVL and establish protocols in nursing care to promote minimal handling. Prevention of hypoxemia and wide fluctuations in blood pressure are critical. Careful attention to adequate ventilation and the continuous monitoring of oxygen saturation will help avoid and treat hypoxemia episodes.

Developmental intervention for preterm infants diagnosed with periventricular leukomalacia.

Preterm infants with periventricular leukomalacia (PVL) were evaluated to determine whether multi-sensory stimulation is safe and to assess whether it improved neurobehavior and neurodevelopment. Thirty preterm infants with documented PVL were randomly assigned to control (n= 15) or experimental (Group E) (n= 15) groups at 33 weeks post-conceptional age. Group E infants received 15 minutes of auditory, tactile, visual, and vestibular (ATVV) intervention twice a day, five days a week, for four weeks during hospitalization. Repeated measures ANOVA demonstrated that Group E infants experienced significant increases in heart and respiratory rate and a 0.72% drop in hemoglobin saturation, coinciding with a significant behavioral state shift from sleep to alertness during intervention. No differences were identified in neurobehavioral function and neurodevelopment, indicating that Group E suffered no injury. Group E had an average hospital stay nine days shorter than that of controls, with the associated cost savings of $213,840. The earlier hospital discharge indicates that ATVV intervention promotes alertness without compromising physiologic status in vulnerable infants.