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Chumley PL, Dudding KM, Patrician P. Defining the Concept of Acoustic Neuroprotection in the Neonate: A Concept Analysis. Adv Neonatal Care 2024; 24:E58-E65. [PMID: 38907701 DOI: 10.1097/anc.0000000000001176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/24/2024]
Abstract
BACKGROUND It has long been understood and acknowledged that the Neonatal Intensive Care Unit (NICU) environment and the transport environments are extremely loud, with both long- and short-term sequelae to the neonate, being well over the recommended amount of noise by the American Academy of Pediatrics (AAP). This problem has yet to be properly addressed. The purpose of this manuscript is to define and explain the concept of acoustic neuroprotection. While we cannot change the internal structures of the neonates' auditory system, we could change the acoustics of the environment to be support neuroprotection of these sensitive patients. EVIDENCE ACQUISITION Walker and Avant's concept analysis steps were followed to create and define the idea of acoustic neuroprotection, as it has not had a definition before. A total of 45 articles from multiple search engines were chosen. A combination of 2 concepts were used: acoustic protection and neurodevelopmental protection/support. The search was expanded past 20 years for lack of research and importance of seminal works. RESULTS To achieve acoustic neuroprotection, a neonate should not be exposed to sound greater than 45 decibels (dBa) for longer than 10 s, and exposure to sound above 80 dBa should never occur. Appropriate interventions need to include supporting the neurodevelopment of the neonate through therapeutic sound, while decreasing the amount of toxic noise exposure to safe levels. IMPLICATIONS FOR PRACTICE AND RESEARCH By further understanding and having a quantifiable goal of acoustic neuroprotection for neonates, neonatal clinicians can work together to create new interventions for how to better protect and support the care of our tiniest patients.
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Affiliation(s)
- Peyton Lewis Chumley
- UAB School of Nursing University of Alabama at Birmingham, School of Nursing, Birmingham, Alabama
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Sibrecht G, Wróblewska-Seniuk K, Bruschettini M. Noise or sound management in the neonatal intensive care unit for preterm or very low birth weight infants. Cochrane Database Syst Rev 2024; 5:CD010333. [PMID: 38813836 PMCID: PMC11137833 DOI: 10.1002/14651858.cd010333.pub4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
BACKGROUND Infants in the neonatal intensive care unit (NICU) are subjected to different types of stress, including sounds of high intensity. The sound levels in NICUs often exceed the maximum acceptable level recommended by the American Academy of Pediatrics, which is 45 decibels (dB). Hearing impairment is diagnosed in 2% to 10% of preterm infants compared to only 0.1% of the general paediatric population. Bringing sound levels under 45 dB can be achieved by lowering the sound levels in an entire unit; by treating the infant in a section of a NICU, in a 'private' room, or in incubators in which the sound levels are controlled; or by reducing sound levels at the individual level using earmuffs or earplugs. By lowering sound levels, the resulting stress can be diminished, thereby promoting growth and reducing adverse neonatal outcomes. This review is an update of one originally published in 2015 and first updated in 2020. OBJECTIVES To determine the benefits and harms of sound reduction on the growth and long-term neurodevelopmental outcomes of neonates. SEARCH METHODS We used standard, extensive Cochrane search methods. On 21 and 22 August 2023, a Cochrane Information Specialist searched CENTRAL, PubMed, Embase, two other databases, two trials registers, and grey literature via Google Scholar and conference abstracts from Pediatric Academic Societies. SELECTION CRITERIA We included randomised controlled trials (RCTs) or quasi-RCTs in preterm infants (less than 32 weeks' postmenstrual age (PMA) or less than 1500 g birth weight) cared for in the resuscitation area, during transport, or once admitted to a NICU or stepdown unit. We specified three types of intervention: 1) intervention at the unit level (i.e. the entire neonatal department), 2) at the section or room level, or 3) at the individual level (e.g. hearing protection). DATA COLLECTION AND ANALYSIS We used the standardised review methods of Cochrane Neonatal to assess the risk of bias in the studies. We used the risk ratio (RR) and risk difference (RD), with their 95% confidence intervals (CIs), for dichotomous data. We used the mean difference (MD) for continuous data. Our primary outcome was major neurodevelopmental disability. We used GRADE to assess the certainty of the evidence. MAIN RESULTS We included one RCT, which enroled 34 newborn infants randomised to the use of silicone earplugs versus no earplugs for hearing protection. It was a single-centre study conducted at the University of Texas Medical School in Houston, Texas, USA. Earplugs were positioned at the time of randomisation and worn continuously until the infants were 35 weeks' postmenstrual age (PMA) or discharged (whichever came first). Newborns in the control group received standard care. The evidence is very uncertain about the effects of silicone earplugs on the following outcomes. • Cerebral palsy (RR 3.00, 95% CI 0.15 to 61.74)and Mental Developmental Index (MDI) (Bayley II) at 18 to 22 months' corrected age (MD 14.00, 95% CI 3.13 to 24.87); no other indicators of major neurodevelopmental disability were reported. • Normal auditory functioning at discharge (RR 1.65, 95% CI 0.93 to 2.94) • All-cause mortality during hospital stay (RR 2.07, 95% CI 0.64 to 6.70; RD 0.20, 95% CI -0.09 to 0.50) • Weight (kg) at 18 to 22 months' corrected age (MD 0.31, 95% CI -1.53 to 2.16) • Height (cm) at 18 to 22 months' corrected age (MD 2.70, 95% CI -3.13 to 8.53) • Days of assisted ventilation (MD -1.44, 95% CI -23.29 to 20.41) • Days of initial hospitalisation (MD 1.36, 95% CI -31.03 to 33.75) For all outcomes, we judged the certainty of evidence as very low. We identified one ongoing RCT that will compare the effects of reduced noise levels and cycled light on visual and neural development in preterm infants. AUTHORS' CONCLUSIONS No studies evaluated interventions to reduce sound levels below 45 dB across the whole neonatal unit or in a room within it. We found only one study that evaluated the benefits of sound reduction in the neonatal intensive care unit for hearing protection in preterm infants. The study compared the use of silicone earplugs versus no earplugs in newborns of very low birth weight (less than 1500 g). Considering the very small sample size, imprecise results, and high risk of attrition bias, the evidence based on this research is very uncertain and no conclusions can be drawn. As there is a lack of evidence to inform healthcare or policy decisions, large, well designed, well conducted, and fully reported RCTs that analyse different aspects of noise reduction in NICUs are needed. They should report both short- and long-term outcomes.
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Affiliation(s)
- Greta Sibrecht
- II Department of Neonatology, Poznan University of Medical Sciences, Poznan, Poland
| | | | - Matteo Bruschettini
- Paediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden, Lund, Sweden
- Cochrane Sweden, Department of Research and Education, Lund University, Skåne University Hospital, Lund, Sweden
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Jin C, Zhao H, Li H, Chen P, Tian C, Li X, Wang M, Liu C, Sun Q, Zheng J, Li B, Zhou X, Salvi R, Yang J. Auditory Effects of Acoustic Noise From 3-T Brain MRI in Neonates With Hearing Protection. J Magn Reson Imaging 2024. [PMID: 38777575 DOI: 10.1002/jmri.29450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Neonates with immature auditory function (eg, weak/absent middle ear muscle reflex) could conceivably be vulnerable to noise-induced hearing loss; however, it is unclear if neonates show evidence of hearing loss following MRI acoustic noise exposure. PURPOSE To explore the auditory effects of MRI acoustic noise in neonates. STUDY TYPE Prospective. SUBJECTS Two independent cohorts of neonates (N = 19 and N = 18; mean gestational-age, 38.75 ± 2.18 and 39.01 ± 1.83 weeks). FIELD STRENGTH/SEQUENCE T1-weighted three-dimensional gradient-echo sequence, T2-weighted fast spin-echo sequence, single-shot echo-planar imaging-based diffusion-tensor imaging, single-shot echo-planar imaging-based diffusion-kurtosis imaging and T2-weighted fluid-attenuated inversion recovery sequence at 3.0 T. ASSESSMENT All neonates wore ear protection during scan protocols lasted ~40 minutes. Equivalent sound pressure levels (SPLs) were measured for both cohorts. In cohort1, left- and right-ear auditory brainstem response (ABR) was measured before (baseline) and after (follow-up) MRI, included assessment of ABR threshold, wave I, III and V latencies and interpeak interval to determine the functional status of auditory nerve and brainstem. In cohort2, baseline and follow-up left- and right-ear distortion product otoacoustic emission (DPOAE) amplitudes were assessed at 1.2 to 7.0 kHz to determine cochlear function. STATISTICAL TEST Wilcoxon signed-rank or paired t-tests with Bonferroni's correction were used to compare the differences between baseline and follow-up ABR and DPOAE measures. RESULTS Equivalent SPLs ranged from 103.5 to 113.6 dBA. No significant differences between baseline and follow-up were detected in left- or right-ear ABR measures (P > 0.999, Bonferroni corrected) in cohort1, or in DPOAE levels at 1.2 to 7.0 kHz in cohort2 (all P > 0.999 Bonferroni corrected except for left-ear levels at 3.5 and 7.0 kHz with corrected P = 0.138 and P = 0.533). DATA CONCLUSION A single 40-minute 3-T MRI with equivalent SPLs of 103.5-113.6 dBA did not result in significant transient disruption of auditory function, as measured by ABR and DPOAE, in neonates with adequate hearing protection. EVIDENCE LEVEL 2. TECHNICAL EFFICACY Stage 5.
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Affiliation(s)
- Chao Jin
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Huifang Zhao
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Huan Li
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Peiyao Chen
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Cong Tian
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Xianjun Li
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Miaomiao Wang
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Congcong Liu
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Qinli Sun
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Jie Zheng
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
| | - Baiya Li
- Department of Head-Neck-Otolaryngology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xihui Zhou
- Department of Pediatrics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Richard Salvi
- Center for Hearing and Deafness, University at Buffalo, Buffalo, New York, USA
| | - Jian Yang
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Shaanxi Engineering Research Center of Computational Imaging and Medical Intelligence, Xi'an, Shaanxi, China
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Aminudin N, Franta J, Bowden A, Corcoran JD, El-Khuffash A, McCallion N. Noise exposure exceeded safe limits during neonatal care and road transport but was reduced by active noise cancelling. Acta Paediatr 2023; 112:2060-2065. [PMID: 37405936 DOI: 10.1111/apa.16900] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 03/29/2023] [Accepted: 07/03/2023] [Indexed: 07/07/2023]
Abstract
AIM Noise levels above 45 dB in a neonatal intensive care unit (NICU) and 60 dB during neonatal transport are recognised hazards, but protective equipment is not standard. We measured noise levels in both settings, with and without noise protection. METHODS Peak sound and equivalent continuous sound levels were measured in a NICU and during road transport, at a mannequin's ear and inside and outside the incubator. Recordings were made without protective earwear, with noise protecting earmuffs and with active noise cancelling headphones. RESULTS In the NICU, the peak levels at the ear, and inside and outside the incubator, were 61, 68 and 76 dB. The equivalent continuous sound levels were 45, 54 and 59 dB. During road transport, the respective levels were 70, 77 and 83 dB and 54, 62 and 68 dB. In the NICU, 80% of environmental peak noise reached the ear and this was reduced to 78% with earmuffs and 75% with active noise cancelling. The respective figures during transport were 87% without protection and 72% with active noise cancelling, with an unexpected increase for ear muffs. CONCLUSION Noise levels exceeded safe limits in the NICU and during transport, but active noise cancelling reduced exposure.
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Affiliation(s)
- Nurul Aminudin
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
- National Neonatal Transport Programme, Dublin, Ireland
- Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Jan Franta
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
- National Neonatal Transport Programme, Dublin, Ireland
| | - Ann Bowden
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
- National Neonatal Transport Programme, Dublin, Ireland
| | - John David Corcoran
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
- Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Afif El-Khuffash
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
- Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Naomi McCallion
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
- Royal College of Surgeons in Ireland, Dublin, Ireland
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van den Berg J, Jakobsson U, Selander B, Lundqvist P. Exploring physiological stability of infants in Kangaroo Mother Care position versus placed in transport incubator during neonatal ground ambulance transport in Sweden. Scand J Caring Sci 2021; 36:997-1005. [PMID: 34008205 DOI: 10.1111/scs.13000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/21/2021] [Accepted: 04/25/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND The positive effects of Kangaroo mother care in NICU's are well documented but, to a lesser extent, explored during inter-hospital neonatal transport. Inter-hospital transport, with the infant placed in a transport incubator, increases the risk of separation while infants in Kangaroo mother care position implies that the parents accompany the transport. There exists limited knowledge if physiological stability differs when transported in Kangaroo mother care position compared to transport in a transport incubator. AIMS The aim of this study was to compare physiological stability of infants transported via ground ambulance in either Kangaroo mother care position or positioned in a transport incubator. METHOD In total, 24 infants were recruited to be transported between hospitals in either a Kangaroo mother care position (n = 16) or in a transport incubator (n = 8). Inclusion criteria were; current weight >1500 g; current gestational age above 31 + 0 weeks; no central catheter; no respiratory support and no planed painful or distressing interventions during the 48-h follow-up period post-transport. Exclusion criteria were; infants whose parents did not speak or understand Swedish or English and infants with a current weight above 4500 g for the KMC group. Physiological stability was obtained during transport and for a 48-h follow-up period by measuring body temperature, respiratory and heart rate, oxygen saturation, pain score, transport risk assessment and number of interventions during transport and 48-h post-transport. Cost-effectiveness and adverse events were also evaluated. RESULTS Both groups had comparable background characteristics and physiological stability during transport and for the 48-h follow-up period after transport. Transporting in Kangaroo mother care position was more cost-effective. STUDY LIMITATION A small sample size in both groups. CONCLUSION Transporting an infant in Kangaroo mother care position can be regarded as a choice of transport mode when the infant fulfils the set criteria.
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Affiliation(s)
| | - Ulf Jakobsson
- Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Bo Selander
- Department of Pediatrics, Central Hospital, Kristianstad, Sweden
| | - Pia Lundqvist
- Department of Health Sciences, Lund University, Lund, Sweden
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Gilmour D, Duong KM, Gilmour IJ, Davies MW. NeoSTRESS: Study of Transfer and Retrieval Environmental StressorS upon neonates via a smartphone application - Sound. J Paediatr Child Health 2020; 56:1396-1401. [PMID: 32949204 DOI: 10.1111/jpc.14947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 03/04/2020] [Accepted: 03/24/2020] [Indexed: 11/28/2022]
Abstract
AIM This study aimed to measure sound exposure during neonatal retrieval, determine whether this varied with mode of transport, and compare noise exposure to recommended levels in neonatal intensive care units. We also aimed to assess the acceptability of using a smartphone application to measure sound. SETTING Neonatal retrieval service in Brisbane, Australia. METHODS The Physics Toolbox Sensor Suite application was installed on a Samsung Galaxy S5 smartphone and calibrated for sound measurement. Data were collected during outbound, non-patient legs of 45 retrievals - 25 road, 11 fixed wing aircraft and 9 rotary aircraft journeys. Data were saved to cloud storage, then analysed using PostgreSQL database. RESULTS The median sound level was 83 dB (interquartile range 66-91; range 27-≥97 dB). Continuous equivalent sound (Leq ) was 90 dB across all journeys. Rotary transport was loudest (Leq 94 dB). Fixed wing (Leq 89 dB) and road (Leq 87 dB) journeys also resulted in significant sound exposure. Sound exceeded recommended levels (45 dB) for 99% of all journey time, regardless of the mode of transport. CONCLUSIONS Neonates encounter harmful sound levels during retrieval - louder than recommended levels for 99% of all retrieval time. Sounds levels were highest in rotary aircraft transport compared to fixed wing or road transport. It is feasible to use a calibrated smartphone application instead of a sound metre.
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Affiliation(s)
- Deborah Gilmour
- NeoRESQ - Neonatal Retrieval Emergency Service Southern Queensland. Butterfield Street, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia.,Faculty of Medicine, School of Clinical Medicine, University of Queensland, Brisbane, Queensland, Australia
| | - Khoi M Duong
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Faculty of Science and Engineering, Brisbane, Queensland, Australia
| | - Ian J Gilmour
- NeoRESQ - Neonatal Retrieval Emergency Service Southern Queensland. Butterfield Street, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Mark W Davies
- Faculty of Medicine, School of Clinical Medicine, University of Queensland, Brisbane, Queensland, Australia.,Department of Neonatology, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
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Almadhoob A, Ohlsson A. Sound reduction management in the neonatal intensive care unit for preterm or very low birth weight infants. Cochrane Database Syst Rev 2020; 1:CD010333. [PMID: 31986231 PMCID: PMC6989790 DOI: 10.1002/14651858.cd010333.pub3] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Infants in the neonatal intensive care unit (NICU) are subjected to stress, including sound of high intensity. The sound environment in the NICU is louder than most home or office environments and contains disturbing noises of short duration and at irregular intervals. There are competing auditory signals that frequently challenge preterm infants, staff and parents. The sound levels in NICUs often exceed the maximum acceptable level of 45 decibels (dB), recommended by the American Academy of Pediatrics. Hearing impairment is diagnosed in 2% to 10% of preterm infants versus 0.1% of the general paediatric population. Noise may cause apnoea, hypoxaemia, alternation in oxygen saturation, and increased oxygen consumption secondary to elevated heart and respiratory rates and may, therefore, decrease the amount of calories available for growth. Elevated levels of speech are needed to overcome the noisy environment in the NICU, thereby increasing the negative impacts on staff, newborns, and their families. High noise levels are associated with an increased rate of errors and accidents, leading to decreased performance among staff. The aim of interventions included in this review is to reduce sound levels to 45 dB or less. This can be achieved by lowering the sound levels in an entire unit, treating the infant in a section of a NICU, in a 'private' room, or in incubators in which the sound levels are controlled, or reducing the sound levels that reaches the individual infant by using earmuffs or earplugs. By lowering the sound levels that reach the neonate, the resulting stress on the cardiovascular, respiratory, neurological, and endocrine systems can be diminished, thereby promoting growth and reducing adverse neonatal outcomes. OBJECTIVES Primary objective To determine the effects of sound reduction on growth and long-term neurodevelopmental outcomes of neonates. Secondary objectives 1. To evaluate the effects of sound reduction on short-term medical outcomes (bronchopulmonary dysplasia, intraventricular haemorrhage, periventricular leukomalacia, retinopathy of prematurity). 2. To evaluate the effects of sound reduction on sleep patterns at three months of age. 3. To evaluate the effects of sound reduction on staff performance. 4. To evaluate the effects of sound reduction in the neonatal intensive care unit (NICU) on parents' satisfaction with the care. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (The Cochrane Library), MEDLINE, EMBASE, CINAHL, abstracts from scientific meetings, clinical trials registries (clinicaltrials.gov; controlled-trials.com; and who.int/ictrp), Pediatric Academic Societies Annual meetings 2000 to 2014 (Abstracts2ViewTM), reference lists of identified trials, and reviews to November 2014. SELECTION CRITERIA Preterm infants (< 32 weeks' postmenstrual age (PMA) or < 1500 g birth weight) cared for in the resuscitation area, during transport, or once admitted to a NICU or a stepdown unit. DATA COLLECTION AND ANALYSIS We performed data collection and analyses according to the Cochrane Neonatal Review Group. MAIN RESULTS One small, high quality study assessing the effects of silicone earplugs versus no earplugs qualified for inclusion. The original inclusion criteria in our protocol stipulated an age of < 48 hours at the time of initiating sound reduction. We made a deviation from our protocol and included this study in which some infants would have been > 48 hours old. There was no significant difference in weight at 34 weeks postmenstrual age (PMA): mean difference (MD) 111 g (95% confidence interval (CI) -151 to 374 g) (n = 23). There was no significant difference in weight at 18 to 22 months corrected age between the groups: MD 0.31 kg, 95% CI -1.53 to 2.16 kg (n = 14). There was a significant difference in Mental Developmental Index (Bayley II) favouring the silicone earplugs group at 18 to 22 months corrected age: MD 14.00, 95% CI 3.13 to 24.87 (n = 12), but not for Psychomotor Development Index (Bayley II) at 18 to 22 months corrected age: MD -2.16, 95% CI -18.44 to 14.12 (n =12). AUTHORS' CONCLUSIONS To date, only 34 infants have been enrolled in a randomised controlled trial (RCT) testing the effectiveness of reducing sound levels that reach the infants' ears in the NICU. Based on the small sample size of this single trial, we cannot make any recommendations for clinical practice. Larger, well designed, conducted and reported trials are needed.
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Affiliation(s)
| | - Arne Ohlsson
- University of TorontoDepartments of Paediatrics, Obstetrics and Gynaecology and Institute of Health Policy, Management and EvaluationTorontoCanada
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Parra J, de Suremain A, Berne Audeoud F, Ego A, Debillon T. Sound levels in a neonatal intensive care unit significantly exceeded recommendations, especially inside incubators. Acta Paediatr 2017; 106:1909-1914. [PMID: 28477430 DOI: 10.1111/apa.13906] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 05/02/2017] [Indexed: 11/27/2022]
Abstract
AIM This study measured sound levels in a 2008 built French neonatal intensive care unit (NICU) and compared them to the 2007 American Academy of Pediatrics (AAP) recommendations. The ultimate aim was to identify factors that could influence noise levels. METHODS The study measured sound in 17 single or double rooms in the NICU. Two dosimeters were installed in each room, one inside and one outside the incubators, and these conducted measurements over a 24-hour period. The noise metrics measured were the equivalent continuous sound level (Leq ), the maximum noise level (Lmax ) and the noise level exceeded for 10% of the measurement period (L10 ). RESULTS The mean Leq , L10 and Lmax were 60.4, 62.1 and 89.1 decibels (dBA), which exceeded the recommended levels of 45, 50 and 65 dBA (p < 0.001), respectively. The Leq inside the incubator was significantly higher than in the room (+8 dBA, p < 0.001). None of the newborns' characteristics, the environment or medical care was correlated to an increased noise level, except for a postconceptional age below 32 weeks. CONCLUSION The sound levels significantly exceeded the AAP recommendations, particularly inside incubators. A multipronged strategy is required to improve the sound environment and protect the neonates' sensory development.
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Affiliation(s)
- Johanna Parra
- Intensive and Regular Neonatal Care Unit; CHR Chambery; Chambéry France
| | | | | | - Anne Ego
- Clinical Research Center (CICO3); CHU Grenoble Alpes; Grenoble France
- CNRS; CHU Grenoble Alpes; VETAGRO SUP; Grenoble Institute of Engineering Univ. Grenoble Alpes; TIMC-IMAG; Univ. Grenoble Alpes; Grenoble France
| | - Thierry Debillon
- Intensive and Regular Neonatal Care Unit; CHU Grenoble Alpes; Grenoble France
- CNRS; CHU Grenoble Alpes; VETAGRO SUP; Grenoble Institute of Engineering Univ. Grenoble Alpes; TIMC-IMAG; Univ. Grenoble Alpes; Grenoble France
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Alfes CM, Steiner S, Rutherford-Hemming T. Challenges and Resources for New Critical Care Transport Crewmembers: A Descriptive Exploratory Study. Air Med J 2016; 35:212-215. [PMID: 27393756 DOI: 10.1016/j.amj.2016.04.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 04/07/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVE The purpose of this study was to identify the challenges new crewmembers experience in the critical care transport (CCT) environment and to determine the most valuable resources when acclimating to the transport environment. To date, no study has focused on the unique challenges nor the resources most effective in CCT training. METHODS This descriptive exploratory study was conducted with a convenience survey sent to the 3 largest professional CCT organizations: the Association of Air Medical Services, the Air and Surface Transport Nurses Association, and the Association of Critical Care Transport. RESULTS The study survey responses revealed that more education and training are needed. Novice crewmembers identified areas in safety, communication, environment, and crew resource management as particularly challenging. Responses also validate the need for more simulation training, especially for CCT of low-volume/high-risk patient populations. CONCLUSION Results of this survey provide valuable insight for improving training effectiveness of health care professionals transitioning to the CCT environment. More information regarding best practice on the frequency and timing of CCT simulation training should be collected, particularly for simulations completed in the transport environment.
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Affiliation(s)
- Celeste M Alfes
- Learning Resource Skills and Simulation Center, Frances Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, OH.
| | - Stephanie Steiner
- Dorothy Ebersbach Academic Center for Flight Nursing, Frances Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, OH
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Prehn J, McEwen I, Jeffries L, Jones M, Daniels T, Goshorn E, Marx C. Decreasing sound and vibration during ground transport of infants with very low birth weight. J Perinatol 2015; 35:110-4. [PMID: 25429381 DOI: 10.1038/jp.2014.172] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 07/27/2014] [Accepted: 08/05/2014] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To measure the effectiveness of modifications to reduce sound and vibration during interhospital ground transport of a simulated infant with very low birth weight (VLBW) and a gestational age of 30 weeks, a period of high susceptibility to germinal matrix and intraventricular hemorrhage. STUDY DESIGN Researchers measured vibration and sound levels during infant transport, and compared levels after modifications to the transport incubator mattresses, addition of vibration isolators under incubator wheels, addition of mass to the incubator mattress and addition of incubator acoustic cover. RESULT Modifications did not decrease sound levels inside the transport incubator during transport. The combination of a gel mattress over an air chambered mattress was effective in decreasing vibration levels for the 1368 g simulated infant. CONCLUSION Transport mattress effectiveness in decreasing vibration is influenced by infant weight. Modifications that decrease vibration for infants weighing 2000 g are not effective for infants with VLBW. Sound levels are not affected by incubator covers, suggesting that sound is transmitted into the incubator as a low-frequency vibration through the incubator's contact with the ambulance. Medical transportation can apply industrial methods of vibration and sound control to protect infants with VLBW from excessive physical strain of transport during vulnerable periods of development.
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Affiliation(s)
- J Prehn
- School of Physical Therapy, William Carey University, Hattiesburg, MS, USA
| | - I McEwen
- Department of Rehabilitation Science, Health Sciences Center, University of Oklahoma, Oklahoma City, OK, USA
| | - L Jeffries
- Health Sciences Center, University of Oklahoma, Oklahoma City, OK, USA
| | - M Jones
- Health Sciences Center, University of Oklahoma, Oklahoma City, OK, USA
| | - T Daniels
- University of Southern Mississippi, Hattiesburg, MS, USA
| | - E Goshorn
- University of Southern Mississippi, Hattiesburg, MS, USA
| | - C Marx
- University of Southern Mississippi, Hattiesburg, MS, USA
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Almadhoob A, Ohlsson A. Sound reduction management in the neonatal intensive care unit for preterm or very low birth weight infants. Cochrane Database Syst Rev 2015; 1:CD010333. [PMID: 25633155 DOI: 10.1002/14651858.cd010333.pub2] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Infants in the neonatal intensive care unit (NICU) are subjected to stress, including sound of high intensity. The sound environment in the NICU is louder than most home or office environments and contains disturbing noises of short duration and at irregular intervals. There are competing auditory signals that frequently challenge preterm infants, staff and parents. The sound levels in NICUs often exceed the maximum acceptable level of 45 decibels (dB), recommended by the American Academy of Pediatrics. Hearing impairment is diagnosed in 2% to 10% of preterm infants versus 0.1% of the general paediatric population. Noise may cause apnoea, hypoxaemia, alternation in oxygen saturation, and increased oxygen consumption secondary to elevated heart and respiratory rates and may, therefore, decrease the amount of calories available for growth. Elevated levels of speech are needed to overcome the noisy environment in the NICU, thereby increasing the negative impacts on staff, newborns, and their families. High noise levels are associated with an increased rate of errors and accidents, leading to decreased performance among staff. The aim of interventions included in this review is to reduce sound levels to 45 dB or less. This can be achieved by lowering the sound levels in an entire unit, treating the infant in a section of a NICU, in a 'private' room, or in incubators in which the sound levels are controlled, or reducing the sound levels that reaches the individual infant by using earmuffs or earplugs. By lowering the sound levels that reach the neonate, the resulting stress on the cardiovascular, respiratory, neurological, and endocrine systems can be diminished, thereby promoting growth and reducing adverse neonatal outcomes. OBJECTIVES Primary objectiveTo determine the effects of sound reduction on growth and long-term neurodevelopmental outcomes of neonates. Secondary objectives1. To evaluate the effects of sound reduction on short-term medical outcomes (bronchopulmonary dysplasia, intraventricular haemorrhage, periventricular leukomalacia, retinopathy of prematurity).2. To evaluate the effects of sound reduction on sleep patterns at three months of age.3. To evaluate the effects of sound reduction on staff performance.4. To evaluate the effects of sound reduction in the neonatal intensive care unit (NICU) on parents' satisfaction with the care. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (The Cochrane Library), MEDLINE, EMBASE, CINAHL, abstracts from scientific meetings, clinical trials registries (clinicaltrials.gov; controlled-trials.com; and who.int/ictrp), Pediatric Academic Societies Annual meetings 2000 to 2014 (Abstracts2View(TM)), reference lists of identified trials, and reviews to November 2014. SELECTION CRITERIA Preterm infants (< 32 weeks' postmenstrual age (PMA) or < 1500 g birth weight) cared for in the resuscitation area, during transport, or once admitted to a NICU or a stepdown unit. DATA COLLECTION AND ANALYSIS We performed data collection and analyses according to the Cochrane Neonatal Review Group. MAIN RESULTS One small, high quality study assessing the effects of silicone earplugs versus no earplugs qualified for inclusion. The original inclusion criteria in our protocol stipulated an age of < 48 hours at the time of initiating sound reduction. We made a deviation from our protocol and included this study in which some infants would have been > 48 hours old. There was no significant difference in weight at 34 weeks postmenstrual age (PMA): mean difference (MD) 111 g (95% confidence interval (CI) -151 to 374 g) (n = 23). There was no significant difference in weight at 18 to 22 months corrected age between the groups: MD 0.31 kg, 95% CI -1.53 to 2.16 kg (n = 14). There was a significant difference in Mental Developmental Index (Bayley II) favouring the silicone earplugs group at 18 to 22 months corrected age: MD 14.00, 95% CI 3.13 to 24.87 (n = 12), but not for Psychomotor Development Index (Bayley II) at 18 to 22 months corrected age: MD -2.16, 95% CI -18.44 to 14.12 (n =12). AUTHORS' CONCLUSIONS To date, only 34 infants have been enrolled in a randomised controlled trial (RCT) testing the effectiveness of reducing sound levels that reach the infants' ears in the NICU. Based on the small sample size of this single trial, we cannot make any recommendations for clinical practice. Larger, well designed, conducted and reported trials are needed.
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Noninvasive Monitoring during Interhospital Transport of Newborn Infants. Crit Care Res Pract 2013; 2013:632474. [PMID: 23509618 PMCID: PMC3595700 DOI: 10.1155/2013/632474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 01/04/2013] [Accepted: 01/08/2013] [Indexed: 11/17/2022] Open
Abstract
The main indications for interhospital neonatal transports are radiographic studies (e.g., magnet resonance imaging) and surgical interventions. Specialized neonatal transport teams need to be skilled in patient care, communication, and equipment management and extensively trained in resuscitation, stabilization, and transport of critically ill infants. However, there is increasing evidence that clinical assessment of heart rate, color, or chest wall movements is imprecise and can be misleading even in experienced hands. The aim of the paper was to review the current evidence on clinical monitoring equipment during interhospital neonatal transport.
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Karlsson BM, Lindkvist M, Lindkvist M, Karlsson M, Lundström R, Håkansson S, Wiklund U, van den Berg J. Sound and vibration: effects on infants' heart rate and heart rate variability during neonatal transport. Acta Paediatr 2012; 101:148-54. [PMID: 21950547 DOI: 10.1111/j.1651-2227.2011.02472.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM To measure the effect of sound and whole-body vibration on infants' heart rate and heart rate variability during ground and air ambulance transport. METHODS Sixteen infants were transported by air ambulance with ground ambulance transport to and from the airports. Whole-body vibration and sound levels were recorded and heart parameters were obtained by ECG signal. RESULTS Sound and whole-body vibration levels exceeded the recommended limits. Mean whole-body vibration and sound levels were 0.19 m/s(2) and 73 dBA, respectively. Higher whole-body vibration was associated with a lower heart rate (p < 0.05), and higher sound level was linked to a higher heart rate (p = 0.05). The heart rate variability was significantly higher at the end of the transport than at the beginning (p < 0.01). Poorer physiological status was associated with lower heart rate variability (p < 0.001) and a lower heart rate (p < 0.01). Infants wearing earmuffs had a lower heart rate (p < 0.05). CONCLUSIONS Sound and whole-body vibration during neonatal transport exceed recommended levels for adults, and sound seem to have a more stressful effect on the infant than vibrations. Infants should wear earmuffs during neonatal transport because of the stress-reducing effect.
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