Shetal Shah

Administration of Inactivated Trivalent Influenza Vaccine to Parents of High-Risk Infants in the Neonatal Intensive Care Unit

OBJECTIVE. Infants who are younger than 6 months and have influenza demonstrate significant morbidity and mortality. Trivalent inactivated influenza vaccine is indicated for parents and household contacts of these infants; however, the influenza vaccination rate in this population is estimated at 30%. The objective of this study was to determine the feasibility of trivalent inactivated influenza vaccine administration to parents in a tertiary-care, level III NICU and measure the effect of this program on vaccination rates among parents of this high-risk population. METHODS. For a 4-month period during influenza season, all parents of admitted patients were informed of the risks and benefits of trivalent inactivated influenza vaccine by placing an information letter at their infants bedside. All staff were educated about the dangers of influenza and instructed to reinforce the need to obtain vaccination. Parents were screened, provided medical consent, and, when eligible, were immunized at their infants bedside. RESULTS. During the study period, 158 children (273 parents) were admitted to the NICU with gestational ages ranging from 24 to 41 weeks; 220 parents (130 infants) were offered the vaccine, and 40 parents received the vaccine from their obstetrician. Overall vaccination rate was 95% (209 parents). A total of 23% of the parent population had never received trivalent inactivated influenza vaccine, despite having previous indications for immunization (smoking, asthma, or other children younger than 23 months, the indicated age for parental vaccination at the time of this study); 75% of the population received trivalent inactivated influenza vaccine for the first time. The 28 infants whose parents were not offered vaccine spent <72 hours in the NICU. CONCLUSIONS. Administration of trivalent inactivated influenza vaccine in the NICU is an effective means of increasing vaccination rates in parents of this population. In addition, the improved access and convenience allow for an increase in first-time vaccination of parents who were previously eligible to receive trivalent inactivated influenza vaccine but were never immunized.

Antenatal treatment of fetal goiter: a therapeutic challenge

Objective. Pre-natal ultrasonography presents an opportunity for in-utero therapy of a fetal goiter. Because of the morbidity associated with a large goiter and the risks of repeated intra-amniotic injections, controversy arose about the precise indications of this mode of treatment. We describe our observations in treating a 22-week-old fetus with a large goiter because of dyshormogenesis, monitored with serial 3D high frequency, high resolution ultrasonography and amniotic hormonal measurements. Fetal hypothyroidism was confirmed by cordocentesis and amniotic hormone levels. After assessment of relevant risk factors and the criteria for in-utero intervention, including goiter volume, amniotic fluid index, polyhydramnios and tracheal compression, we determined that hormonal therapy was warranted. Levothyroxine was injected every 7–10 days, and its efficacy monitored by ultrasound changes and amniotic hormone sampling. Results. Reduction in goiter volume restored normal neck flexion relieving the pressure on the trachea, polyhydramnios was prevented and amniotic hormone levels were normalised. The infant was euthyroid at birth, however, by age 4 days hypothyroidism was diagnosed, and treatment with l-thyroxine started. Conclusion. Advances in fetal ultrasonography permit judicious therapy of an enlarging goiter in a hypothyroid fetus, which may contribute to enhancing cognitive development. We discuss the value of amniotic hormone sampling, the objectives and risks of in-utero intervention in the light of recent literature and our own observations.

Quantification of impulse experienced by neonates during inter- and intra-hospital transport measured by biophysical accelerometery.

Abstract Background: Transport of premature infants incurs transfer-related morbidity, including intraventricular hemorrhage, a contributing factor to cerebral palsy. The force transmitted to the neonate during transport as a consequence of motion may be implicated in the increased morbidity in this population. Morbidity may occur via direct concussive force to a vulnerable germinal matrix, induction of an inflammatory reaction, or via transient desaturation via extubation. This transmitted force, measured as accelerations per unit time (impulse), is not well characterized. Any modification of a neonatal transporter which increases the time for a neonate in motion to come to rest may decrease the impulse experienced by the infant. Objective: The objective of the study was to quantify the magnitude of impulse experienced by neonates during inter- and intra-hospital transport using a novel biophysical model and determine whether a specialized air-foam mattress can reduce the transmitted impulse on the neonate. Methods: Five roundtrip trials were conducted for a transported neonate using a standard medical ambulance and transport isolette outfitted with an air-foam mattress. During the trials, measurements were made per second in the X (front-to-back), Y (side-to-side), and Z (up-and-down) planes using a computerized accelerometer attached to a neonatal resuscitation mannequin. Results were integrated over the trial time in each dimension to yield a measure of impulse (acceleration-per-unit-time). Total impulse for the trial was calculated. A second design included five trials from the delivery room to the NICU utilizing four different transport configurations with a standard neonatal isolette outfitted with a gel pillow, air-foam mattress, and air-foam mattress with gel pillow. Results: Mean impulse for the transport model was statistically greater than at rest. In the X and Z dimensions, the mean impulse was significantly lower using the air-foam mattress. The impulse of the Z dimension with the air-foam mattress did not differ from that experienced by the experimental model at rest. For the intra-hospital trial, all experimental set-ups produced significantly less cumulative impulse than the standard isolette, though in each specific dimension, no significant differences were noted. For cumulative impulse, no significant differences between any of the three experimental designs were observed. A trend toward decreased transport time was seen with the addition of the air-foam mattress and gel pillow. Conclusions: The mechanical trauma induced by transport can be measured and quantified using this system. Neonates transported with the air-foam mattress experienced less impulse in the front-to-back and up-and-down dimensions. For transports between the delivery room and NICU, neonates transported using the air-foam mattress and gel pillow experienced significantly less total impulse.

Rationale for the administration of acellular pertussis vaccine to parents of infants in the neonatal intensive care unit.

Pertussis infections in the United States are increasing as a consequence of waning immunity and increased surveillance. Those most at-risk of mortality include infants less than 6 months of age and premature infants. The 2006 immunization schedule emphasizes an adolescent pertussis booster at 12 years of age. However, of concern is the current generation of parents and grandparents who will still be un-immunized and therefore, available vectors of pertussis to vulnerable neonates. Given the proximity of parents to medical care in the Neonatal Intensive Care Unit (NICU), and the potential for severe disease in their children, NICU personnel should consider administration of acellular pertussis vaccine to parents of hospitalized infants.

Rationale and implementation policy for use of oral, live, reassortant rotavirus vaccine in the neonatal intensive care unit.

Advances in Neonatal Care • Vol. 8, No. 3 • pp. 148-149 Rotavirus is a common cause of gastrointestinal morbidity and mortality in the infant population. Live, attenuated, oral vaccination against rotavirus is now recommended for all infants between 6 and 32 weeks of age.1 Furthermore, significant immunity is conferred after only 3 doses.2 Given the prevalence of rotavirus and the logistical constraints to administering all 3 doses prior to 32 weeks’ chronologic age, initiation of immunization in the neonatal intensive care unit (NICU) is warranted.3–6 Because of the concerns over use of a live oral vaccine, we propose a practical strategy for administration of a live oral rotavirus vaccine in the NICU.

Tuberculous splenic abscess in a neonate with thrombocytopenia

We present a case of a premature neonate who presented with anemia and persistent thrombocytopenia. The patient was ultimately diagnosed with disseminated tuberculosis. Initial sonographic evaluation of the abdomen revealed a heterogeneous but predominately hypoechoic spleen; there was subsequent evolution of a splenic abscess. The patient was treated medically with anti-tubercular drugs. Follow-up post-treatment sonograms of the spleen showed diminution of the abscess and the evolution of multiple calcifications compatible with calcified granulomas. This case is an unusual presentation of tuberculosis in an infant with splenic abscess associated with thrombocytopenia and anemia.

The time-associated impact of the Newborn Influenza Protection Act on infant influenza rates in New York State

Abstract Background: Influenza presents with increased morbidity and mortality in children ≤5 months of age. Vaccination of caregivers is indicated, but immunization rates are estimated at only 30%. The 2009 New York State Neonatal Influenza Protection Act (NIPA) mandated offering of influenza vaccine to caregivers during the post-partum hospitalization. The purpose of this study was to determine the impact of NIPA on infant influenza rates. Method: Data on laboratory-confirmed influenza cases between 2006 and 2012 were extracted from the New York State Electronic Clinical Laboratory Reporting System (ECLRS). Data on infant cases were categorized by age (0–5 months) and location [New York City (NYC), outside NYC] based on reporting laboratory site. The total number of influenza cases and the percentage of total cases in the infant age group were normalized to the number of reporting laboratory sites. The χ2-test was used to compare the proportions of cases pre- and post-implementation. Year-to-year trends were assessed by linear regression. All tests of significance were two-sided and evaluated at the P<0.05 level. Results: During the 6-year study period, 3154 cases of infant influenza were detected. In bivariate analysis, 1707 (54.1%) of cases occurred prior to NIPA implementation and 1447 (45.9%) of cases occurred after (P<0.001). Of the 1422 total infant cases detected in NYC, the percentages of influenza cases pre- and post-NIPA were 54.6% (777) and 45.4% (645), respectively (P<0.006). Outside NYC, the percentage of infant cases was reduced from 53.7% (930/1732) to 46.3% (802/1732, P<0.02). Prior to implementation, there was a year-to-year increase in the number of infant influenza cases statewide (P<0.04 for trend). The ratio of infant influenza cases normalized per ECLRS site in NYC increased each year after NIPA passage (P<0.01 for trend). The ratio of infant cases outside NYC decreased annually (P<0.05 for trend). No year-to-year trends were seen in the percentage of total influenza cases in the infant age group compared to total cases across all age groups either within or outside NYC. Conclusions: Comparison of three influenza seasons before and after NIPA suggests a total statewide reduction in infant influenza. However, the greatest driver of this reduction occurs from reduced disease in infants outside NYC. We speculate that, with increased crowding within NYC, parental immunization as encouraged by NIPA may not create cocoon immunity.

Simulated transport alters surfactant homeostasis and causes dose-dependent changes in respiratory function in neonatal Sprague-Dawley rats.

Abstract Objective: Forces transmitted to the neonate as a consequence of accelerations during transport have been associated with adverse neonatal outcomes including broncho-pulmonary dysplasia. In this study, we sought to determine the relationship between the duration of transport and respiratory performance in the rat model. Methods: Four groups of Sprague-Dawley rat pups (10–12 pups/groups) were exposed to simulated medical transport on postnatal day of life 11 or 12. Each group was exposed to an average impulse of 27.4 m/s2/min for 0, 30, 60 or 90 min. During the exposure periods, impulse was monitored by computerized sampling using a digital accelerometer. Post-exposure, animals were immediately prepared, placed on mechanical ventilation and analyzed for elastance, tissue damping, airway resistance, ratio of damping to elastance (eta), hysteresivity, and inertance at positive end expiratory pressures (PEEPs) of 0, 3 and 6 cm3 of H2O. Total phospholipid content and surfactant proteins A, B, and C mRNA levels in broncho-alveolar lavage fluid and lung tissue were obtained. Results: Increased transport time resulted in a significant step-wise increase in airway resistance at all levels of PEEP (P<0.01). Static compliance decreased significantly after 60 min at PEEPs of 3 and 6 cm H2O (P<0.01). Eta significantly decreased with greater transport time at a PEEP of 6 cm H2O (P<0.05). Tissue damping increased with duration of transport time across all PEEP levels, but only exhibited statistical significance at a PEEP of 0 cm H2O (P<0.05). No differences were seen in hysteresivity or inertance. Compared with controls, transport was associated with significant reductions in total phospholipid content and mRNA levels of surfactant proteins B and C. Conclusion: Rat pups experienced significant deterioration of respiratory function with increasing duration of simulated transport.