scholarly journals Longitudinal Comparison of Auditory Steady-State Evoked Potentials in Preterm and Term Infants: The Maturation Process

2016 ◽  
Vol 21 (03) ◽  
pp. 200-205 ◽  
Author(s):  
Ana Sousa ◽  
Dayane Didoné ◽  
Pricila Sleifer
Keyword(s):  
Steady State ◽  
Preterm Infants ◽  
System Development ◽  
Pediatric Population ◽  
Full Term ◽  
Preterm Neonates ◽  
Term Infants ◽  
Longitudinal Comparison ◽  
And Gender ◽  
Auditory Monitoring

Introduction Preterm neonates are at risk of changes in their auditory system development, which explains the need for auditory monitoring of this population. The Auditory Steady-State Response (ASSR) is an objective method that allows obtaining the electrophysiological thresholds with greater applicability in neonatal and pediatric population. Objective The purpose of this study is to compare the ASSR thresholds in preterm and term infants evaluated during two stages. Method The study included 63 normal hearing neonates: 33 preterm and 30 term. They underwent assessment of ASSR in both ears simultaneously through insert phones in the frequencies of 500 to 4000Hz with the amplitude modulated from 77 to 103Hz. We presented the intensity at a decreasing level to detect the minimum level of responses. At 18 months, 26 of 33 preterm infants returned for the new assessment for ASSR and were compared with 30 full-term infants. We compared between groups according to gestational age. Results Electrophysiological thresholds were higher in preterm than in full-term neonates (p < 0.05) at the first testing. There were no significant differences between ears and gender. At 18 months, there was no difference between groups (p > 0.05) in all the variables described. Conclusion In the first evaluation preterm had higher thresholds in ASSR. There was no difference at 18 months of age, showing the auditory maturation of preterm infants throughout their development.

scholarly journals Morbidity profile and immediate outcome of late preterm neonates compared to term neonates in a rural tertiary care hospital of Gujarat

2017 ◽  
Vol 4 (4) ◽  
pp. 1329 ◽  
Author(s):  
Manish Rasania ◽  
Prasad Muley
Keyword(s):  
Preterm Infants ◽  
Tertiary Care ◽  
Preterm Births ◽  
Full Term ◽  
Late Preterm ◽  
Preterm Neonates ◽  
Care Hospital ◽  
Term Infants ◽  
Term Neonates ◽  
Late Preterm Infants

Background: Late premature infants are born near term, but are immature. As a consequence, late preterm infants are at higher risk than term infants to develop morbidities. Although late preterm infants are the largest subgroup of preterm infants, there is a very limited data available on problems regarding late preterm infants in rural India.Methods: This is a retrospective cohort study using previously collected data from neonates born at Dhiraj Hospital and neonates who were born outside but admitted at SNCU of Dhiraj Hospital, Piparia, Vadodara district, Gujarat, India between January 2015 to December 2015.Results: 168 late preterm infants and 1025 term infants were included in this study. The need for SNCU admission is significantly higher in late preterm compared to full term (41.07% vs 2.04%). Morbidities were higher in late preterm neonates compared to full term neonates. Sepsis (4.76% vs 1.07%), TTN (10.11% vs 2.04%), hyperbilirubinemia (19.04% vs 9.36%), RDS (1.78% vs 0.09%), hypoglycemia (1.78% vs 0.29%), PDA (1.78% vs 0.58%), risk of major congenital malformation (2.38% vs 0.58%). Need for respiratory support was 5.95% in late preterm vs 2.04% in full term neonates. Immediate neonatal outcome in terms of death and DAMA (non-salvageable) cases was poor in late preterm neonates compared to full term neonates (1.19% vs 0.78%).Conclusions: Late preterm neonates are at higher risk of morbidities and mortalities. They require special care. Judicious obstetric decisions are required to prevent late preterm births. 

scholarly journals Effect of sex and gestational age on neonatal body composition

2012 ◽  
Vol 109 (6) ◽  
pp. 1105-1108 ◽  
Author(s):  
Laure Simon ◽  
Paula Borrego ◽  
Dominique Darmaun ◽  
Arnaud Legrand ◽  
Jean-Christophe Rozé ◽  
...  
Keyword(s):  
Body Composition ◽  
Lean Body Mass ◽  
Preterm Infants ◽  
Body Mass ◽  
Fat Mass ◽  
Full Term ◽  
Preterm Neonates ◽  
Absolute Amount ◽  
Term Infants ◽  
Term Neonates

To determine the effects of length of gestation and sex on infant body composition, air displacement plethysmography was performed in forty-six full-term neonates at 3 d of life and during the week prior to hospital discharge in 180 preterm neonates. Fat mass, as a percentage of body weight, was higher in preterm than in term infants (13·4 (sd 4·2) v. 10·1 (sd 3·7) %, respectively; P= 0·001). The absolute amount of fat mass did not differ between preterm and full-term newborns (323 (sd 126) v. 335 (sd 138) g; P= 0·58), whereas lean body mass was lower in preterm than in term infants (2055 (sd 280) v. 2937 (sd 259) g, respectively; P< 0·001). Among full-term infants, fat mass was higher in females than in males (11·1 (sd 3·7) v. 9·0 (sd 3·3) %, respectively; P= 0·047), whereas we did not observe any sex difference in preterm infants (13·5 (sd 4·1) v. 13·4 (sd 4·3) %; P= 0·89). Our data suggest that by the time they are discharged from hospital: (1) preterm infants have a higher percentage of body fat than term neonates and (2) this is presumably due to a lesser accretion in lean body mass in the first few weeks of extra-uterine life, particularly in boys.

The Auditory Steady-State Response: Full-Term and Premature Neonates

2002 ◽  
Vol 13 (05) ◽  
pp. 260-269 ◽  
Author(s):  
Barbara Cone-Wesson ◽  
John Parker ◽  
Nina Swiderski ◽  
Field Rickards
Keyword(s):  
Steady State ◽  
Premature Infants ◽  
Modulation Frequency ◽  
Otoacoustic Emission ◽  
Full Term ◽  
Steady State Response ◽  
Pass Rates ◽  
Term Infants ◽  
State Response ◽  
Auditory Steady State Response

Two studies were aimed at developing the auditory steady-state response (ASSR) for universal newborn hearing screening. First, neonates who had passed auditory brainstem response, transient evoked otoacoustic emission, and distortion-product otoacoustic emission tests were also tested with ASSRs using modulated tones that varied in frequency and level. Pass rates were highest (> 90%) for amplitude-modulated tones presented at levels ≥ 69 dB SPL. The effect of modulation frequency on ASSR for 500- and 2000-Hz tones was evaluated in full-term and premature infants in the second study. Full-term infants had higher pass rates for 2000-Hz tones amplitude modulated at 74 to 106 Hz compared with pass rates for a 500-Hz tone modulated at 58 to 90 Hz. Premature infants had lower pass rates than full-term infants for both carrier frequencies. Systematic investigation of ASSR threshold and the effect of modulation frequency in neonates is needed to adapt the technique for screening.

Infant–Father Attachment in Infants Born Preterm - A Brief Report

2021 ◽  
pp. 1-6
Author(s):  
Ruediger Kissgen ◽  
Sebastian Franke ◽  
Nino Jorjadze ◽  
Bernhard Roth ◽  
Angela Kribs
Keyword(s):  
Preterm Infants ◽  
Full Term ◽  
Strange Situation ◽  
Term Infants ◽  
Attachment Quality ◽  
Attachment Research ◽  
Neurodevelopmental Problems ◽  
Strange Situation Procedure ◽  
Father Attachment

This study examines the infant–father attachment in infants born preterm (<  1500 g at birth and/or <  37 weeks gestation) in comparison to full-term infants. The infant–father attachment was assessed using the Strange Situation Procedure at a (corrected) age of 15 months. We found at least half of preterm and full-term infants (50.0% and 56.5 % respectively) securely attached to their fathers, and no significant overall difference was observed concerning the distribution of attachment quality comparing the two groups. In light of the fact that preterm infants tend to have numerous neurodevelopmental problems, it is encouraging that significant differences were not found in the distribution of the attachment quality among the groups. Therefore, from the perspective of attachment research, it would be highly beneficial to include fathers in the care of their preterm infants.

Reduction in Obstructive Breathing Events During Body Rocking: A Controlled Polygraphic Study in Preterm and Full-Term Infants

PEDIATRICS ◽  
1995 ◽  
Vol 96 (1) ◽  
pp. 64-68
Author(s):  
J. Groswasser ◽  
M. Sottiaux ◽  
E. Rebuffat ◽  
T. Simon ◽  
M. Vandeweyer ◽  
...  
Keyword(s):  
Eye Movement ◽  
Preterm Infants ◽  
Upper Airway ◽  
Periodic Breathing ◽  
Full Term ◽  
Rapid Eye Movement ◽  
Term Infants ◽  
Obstructive Sleep ◽  
Significant Difference ◽  
Obstructive Sleep Apneas

Objective. To investigate the effect of body rocking on infant respiratory behavior during sleep. Methods. Eighteen infants with documented obstructive sleep apneas were studied. There were eight premature infants with persistent bradycardias and 10 infants born full-term, admitted after an idiopathic apparent life-threatening event. No cause for the obstructive apneas was found. The infants were recorded with polygraphic techniques during two successive nights. They were randomly assigned to a rocking or a nonrocking mattress. The conditions were reversed the following night, in a crossover design. Results. In both groups of infants, no significant difference was seen between the two consecutive nights for most of the variables studied: total sleep time, the proportion of non-rapid-eye-movement and rapid-eye-movement sleep, the number of arousals, the number and maximal duration of central apneas, the frequency of periodic breathing, the level of oxygen saturation, and heart rate. During the nonrocking nights, all infants had repeated obstructive breathing events. In seven of the eight preterm infants and in nine of the 10 full-term subjects, body rocking was associated with a significant decrease in the frequency of obstructive events. During rocking, in the preterm infants the obstructions fell from a median of 2.5 to 1.8 episodes per hour (P = .034). In the full-term infants, rocking reduced the obstructive events from a median of 1.5 obstructions per hour to 0.7 (P = .005). No difference was seen for the duration of the obstructive episodes. Conclusion. In preterm and full-term infants prone to obstructive sleep apneas, gentle side-to-side body rocking is associated with a significant decrease in the frequency of upper-airway obstructions.

Vaccinations in Infants Born Preterm: An Update

2020 ◽  
Vol 16 (2) ◽  
pp. 148-155
Author(s):  
Areti Aphrodite Sioriki ◽  
Despoina Gkentzi ◽  
Evangelia Papadimitriou ◽  
Gabriel Dimitriou ◽  
Ageliki Karatza
Keyword(s):  
Preterm Infants ◽  
Vaccine Safety ◽  
Full Term ◽  
Morbidity And Mortality ◽  
Term Infants ◽  
Safety And Efficacy ◽  
Vaccine Preventable Diseases ◽  
Increased Risk ◽  
Protective Antibodies

Infants born prematurely (before completion of 37 weeks of gestation) are at increased risk of morbidity and mortality due to vaccine preventable diseases, mostly because of their immunological immaturity and failure of transfer of maternal protective antibodies. Despite their great need of being vaccinated, concerns on vaccine safety and efficacy, constitute the main reasons for which vaccinations are often delayed in this group. In this review we summarize the latest evidence on vaccine safety, efficacy and immunogenicity in preterm infants which is similar to full-term infants. Therefore there is no reason for delaying vaccination in this population.

scholarly journals A Computational Role for Top–Down Modulation from Frontal Cortex in Infancy

2020 ◽  
Vol 32 (3) ◽  
pp. 508-514 ◽  
Author(s):  
Sagi Jaffe-Dax ◽  
Alex M. Boldin ◽  
Nathaniel D. Daw ◽  
Lauren L. Emberson
Keyword(s):  
Associative Learning ◽  
Preterm Infants ◽  
Prediction Error ◽  
Frontal Lobes ◽  
Full Term ◽  
Computational Learning ◽  
Top Down ◽  
Term Infants ◽  
Young Infants ◽  
Sensory Prediction

Recent findings have shown that full-term infants engage in top–down sensory prediction, and these predictions are impaired as a result of premature birth. Here, we use an associative learning model to uncover the neuroanatomical origins and computational nature of this top–down signal. Infants were exposed to a probabilistic audiovisual association. We find that both groups (full term, preterm) have a comparable stimulus-related response in sensory and frontal lobes and track prediction error in their frontal lobes. However, preterm infants differ from their full-term peers in weaker tracking of prediction error in sensory regions. We infer that top–down signals from the frontal lobe to the sensory regions carry information about prediction error. Using computational learning models and comparing neuroimaging results from full-term and preterm infants, we have uncovered the computational content of top–down signals in young infants when they are engaged in a probabilistic associative learning.

Effect of a single breath of 100% oxygen on respiration in neonates during sleep

1984 ◽  
Vol 57 (5) ◽  
pp. 1531-1535 ◽  
Author(s):  
T. Aizad ◽  
J. Bodani ◽  
D. Cates ◽  
L. Horvath ◽  
H. Rigatto
Keyword(s):  
Gestational Age ◽  
Minute Ventilation ◽  
Control Period ◽  
Full Term ◽  
Preterm Neonates ◽  
Sleep State ◽  
Quiet Sleep ◽  
Peripheral Chemoreceptor ◽  
Term Infants ◽  
Single Breath

To determine the effect of a single breath of 100% O2 on ventilation, 10 full-term [body wt 3,360 +/- 110 (SE) g, gestational age 39 +/- 0.4 wk, postnatal age 3 +/- 0.6 days] and 10 preterm neonates (body wt 2,020 +/- 60 g, gestational age 34 +/- 2 wk, postnatal age 9 +/- 2 days) were studied during active and quiet sleep states. The single-breath method was used to measure peripheral chemoreceptor response. To enhance response and standardize the control period for all infants, fractional inspired O2 concentration was adjusted to 16 +/- 0.6% for a control O2 saturation of 83 +/- 1%. After 1 min of control in each sleep state, each infant was given a single breath of O2 followed by 21% O2. Minute ventilation (VE), tidal volume (VT), breathing frequency (f), alveolar O2 and CO2 tension, O2 saturation (ear oximeter), and transcutaneous O2 tension were measured. VE always decreased with inhalation of O2 (P less than 0.01). In quiet sleep, the decrease in VE was less in full-term (14%) than in preterm (40%) infants (P less than 0.001). Decrease in VE was due primarily to a drop in VT in full-term infants as opposed to a fall in f and VT in preterm infants (P less than 0.05). Apnea, as part of the response, was more prevalent in preterm than in full-term infants. In active sleep the decrease in VE was similar both among full-term (19%) and preterm (21%) infants (P greater than 0.5). These results suggest greater peripheral chemoreceptor response in preterm than in full-term infants, reflected by a more pronounced decrease in VE with O2. The results are compatible with a more powerful peripheral chemoreceptor contribution to breathing in preterm than in full-term infants.

scholarly journals Platelets in the neonatal period: developmental differences in platelet production, function, and hemostasis and the potential impact of therapies

Hematology ◽  
2012 ◽  
Vol 2012 (1) ◽  
pp. 506-511 ◽  
Author(s):  
Martha Sola-Visner
Keyword(s):  
Preterm Infants ◽  
Neonatal Intensive Care ◽  
Developmental Differences ◽  
Full Term ◽  
Term Infants ◽  
Platelet Production ◽  
Primary Hemostasis ◽  
Wall Interaction ◽  
And Function

Abstract Thrombocytopenia is a common problem among sick neonates admitted to the neonatal intensive care unit. Frequently, platelet transfusions are given to thrombocytopenic infants in an attempt to decrease the incidence or severity of hemorrhage, which is often intracranial. Whereas there is very limited evidence to guide platelet transfusion practices in this population, preterm infants in the first week of life (the highest risk period for bleeding) are nearly universally transfused at higher platelet counts than older infants or children. To a large extent, this practice has been influenced by the observation that neonatal platelets are hyporeactive in response to multiple agonists in vitro, although full-term infants exhibit normal to increased primary hemostasis. This apparently paradoxical finding is due to factors in the neonatal blood that enhance the platelet-vessel wall interaction and counteract the platelet hyporeactivity. Relatively few studies have evaluated the platelet function and primary hemostasis of preterm infants, the subset of neonates at highest risk of bleeding and those most frequently transfused. Current understanding of platelet production and function in preterm and full-term neonates, how these factors affect their response to thrombocytopenia and their primary hemostasis, and the implications of these developmental differences to transfusion medicine are reviewed herein.

Effect of maturation on the extrathoracic airway stability of infants

1992 ◽  
Vol 73 (6) ◽  
pp. 2368-2372 ◽  
Author(s):  
S. Duara ◽  
G. Silva Neto ◽  
N. Claure ◽  
T. Gerhardt ◽  
E. Bancalari
Keyword(s):  
Preterm Infants ◽  
Full Term ◽  
Intraluminal Pressure ◽  
Pulmonary Resistance ◽  
Intrinsic Resistance ◽  
Quiet Sleep ◽  
Term Infants ◽  
Airway Narrowing ◽  
Extrathoracic Airway ◽  
Age Studies

The influence of maturation on extrathoracic airway (ETA) stability during quiet sleep was determined in 13 normal preterm infants of 1.41 +/- 0.14 (SD) kg birth weight and 32 +/- 2 wk estimated gestational age. Studies began in the first week of life and were performed three times at weekly intervals. A drop in intraluminal pressure within the ETA was produced by external inspiratory flow-resistive loading (60 cmH2O.l-1 x s at 1 l/min); an increase in intrinsic resistance, indicating airway narrowing, was sought as a measure of ETA instability. Baseline total pulmonary resistance was not significantly different between weeks 1, 2, and 3 (88 +/- 35, 65 +/- 24, and 61 +/- 17 cmH2O.l-1 x s, respectively) but increased markedly above baseline with loading to 144 +/- 45 cmH2O.l-1.s during week 1 (P < 0.001), 89 +/- 28 cmH2O.l-1 x s at week 2 (P < 0.01), and 74 +/- 25 cmH2O.l-1 x s at week 3 (n = 10). The increment with loading was significantly greater during week 1 than during weeks 2 or 3 (P < 0.02). Similar studies were also done in seven full-term infants in the first week of life to evaluate the influence of gestational maturity on ETA stability. Despite a relatively greater drop in intraluminal pressure within the ETA of term vs. preterm infants with loading (P < 0.001), total pulmonary resistance failed to increase (68 +/- 21 to 71 +/- 32 cmH2O.l-1.s). These data reveal that ETA instability is present in preterm infants at birth and decreases with increasing postnatal age. Full-term neonates, by comparison, display markedly greater ETA stability in the immediate neonatal period.

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