Neonatal Airway Management

Subglottic dilatation in extremely preterm infants on prolonged mechanical ventilation

BACKGROUND

Airway injuries are reported among preterm infants with bronchopulmonary dysplasia. We hypothesized that prolonged ventilation in preterm infants is associated with subglottic dilatation that can be reliably evaluated by point of care ultrasonography (POCUS).

METHODS

All preterm infants (<29-weeks) admitted to the neonatal ICU at the Advent-Health from January-2020 to June-2022 were eligible if they required invasive ventilation for ≤7 days in the first 28 days of life (control) or remained intubated for ≥28 days (prolonged ventilation). Sonography was performed by one technician and all images were reviewed by the pediatric radiologist. The trachea size was measured 3 times by randomly selecting three images. The first 20 scans were also independently reported by a different pediatric radiologist. Intra and inter-observer variability was estimated. Mean trachea size and weight at the time of imaging were compared.

RESULTS

Out of 417 eligible infants; 11 died before 28 days and 163 required ventilation for 8-27 days. Consent missed for 80 infants during COVID-19 pandemic. We enrolled 23 and 28 infants in the control & prolonged ventilation groups, respectively. Inter and intra-observer correlations were 0.83 and 0.97 respectively. Infants in the control group had higher gestation and birth weight. Infants on prolonged ventilation were at higher risk for infections, BPD, longer hospital stay and significant subglottic dilation (4.51 ± 0.04 vs 4.17 ± 0.02 mm, p < 0.01) despite smaller body weight at the time of imaging (884 ± 102 vs 1059 ± 123g, p < 0.01).

CONCLUSION

Extremely preterm infants on prolonged ventilation are at risk for sub-glottic dilatation that can be reliably measured by POCUS.

Effect of continuous workshop training of the helping babies breathe program on the retention of midwives' knowledge and skills: A clinical trial study

AIM

To investigate the impact of ongoing workshop training of the "Helping Babies Breathe" program on the durability of midwives' knowledge and skills.

BACKGROUND

Implementing the Helping Babies Breathe (HBB) program is crucial as a simple protocol for neonatal resuscitation in low-resource healthcare settings to decrease the rate of asphyxia and perinatal mortality by the initial healthcare providers. In addition to training in this program, it is also essential to guarantee the retention of the acquired knowledge and skills.

DESIGN

A quasi-experimental clinical trial study with a single-group, pre-test-and-post-test design.

METHODS

This study was conducted throughout the year 2022, with a sample size of 61 midwives selected through a census sampling from those working in the delivery and operating rooms of X Hospital in x City. The midwives participated in 3-hour workshops. This study was performed in two stages: intervention and follow-up. The evaluation Instruments included the HBB educational package, which consisted of a questionnaire and 3 Objective Structured Clinical Exams. During the intervention phase, the HBB program training was conducted through a series of workshops held at four different time points over a span of six months. In the follow-up stage, the learners were not provided with any further training. The evaluation was done immediately after the initial training workshop of the HBB program, at the end of the final workshop in the sixth month and at the end of the follow-up period.

RESULTS

The mean knowledge score of the baseline, at six months and at twelve months after the initial workshop were documented as (17 SD1.2), (17.79 SD 0.4) and (17.73 SD 0.5), respectively. There was a statistically significant difference in the mean knowledge scores between the baseline and the six and twelve months (P<0.05), but no statistically significant difference was observed between six and twelve months (P>0.05). The mean skill scores showed a significant improvement and were maintained after six months compared with the initial assessment (P<0.05); however, there was a significant decrease in skill score twelve months later, in comparison to both the initial assessment and the first six months (P<0.05).

CONCLUSIONS

Healthcare workers can maintain their knowledge and skills by participating in ongoing training workshops. However, without continuous training, their skills may diminish. Therefore, it is essential to implement training programs that emphasize regular practice and repetition to ensure knowledge and skills retention.

REGISTRATION NUMBER

The present research was a part of the research work with the ethics ID IR.IRSHUMS.REC.1400.019.

Cuffed versus uncuffed endotracheal tubes in neonates undergoing noncardiac surgeries: A randomized controlled trial

BACKGROUND

The efficacy and safety of cuffed endotracheal tubes (ETTs) in neonates are still unclear, this study aimed to assess the efficacy of cuffed versus uncuffed ETTs in neonate undergoing noncardiac surgeries.

METHODS

Neonates scheduled for noncardiac surgeries were randomized into two groups according to the type of airway device during general anesthesia: cuffed ETT group (n = 60) and the uncuffed ETT group (n = 60). The primary outcome was the incidence of ETT exchange to find the appropriate ETT. Other outcomes included: duration of intubation, lung ultrasound score, and incidence of postoperative complications (croup, wheezes, hypoxia, etc.).

RESULTS

The frequency of ETT exchange was lower in the cuffed ETT group compared to the uncuffed one {1 (1.7%) vs. 28 (46.7%), p = .0001; relative risk [95% confidence interval]: 0.54 [0.43-0.69]}. Postoperative adverse events were comparable between both groups except for significantly higher post extubation croup in the uncuffed ETT group compared to the cuffed ETT {10 (16.7%) vs. 3(5%), p value = .04, relative risk (95% confidence interval): 1.14 (1-1.29)}.

CONCLUSION

In full term neonates undergoing noncardiac surgeries, the use of cuffed ETT was associated with less need to tracheal tube exchange and less incidence of postoperative croup, without increasing the postoperative respiratory complications compared to uncuffed ETT.

Randomized controlled trial to evaluate the rate of successful neonatal endotracheal intubation performed with a stylet versus without a stylet

INTRODUCTION

Neonates in intensive care units often require endotracheal intubation and mechanical ventilation. During this intubation procedure, a stylet is frequently used along with an endotracheal tube. Despite the widespread use of a stylet, it is still not known whether its use increases the intubation success rate. This study examined the association between stylet use and the intubation success rate in surgical neonates.

METHODOLOGY

This single-center study was conducted between December 2021 and December 2022 in the Neonatal surgical intensive care unit of a tertiary care center in Northern India. Infants were randomized to have the endotracheal intubation procedure performed using either an endotracheal tube alone or with a stylet. The primary outcome of the study was to assess the successful first-attempt neonatal endotracheal intubation rate with and without using a stylet. Apart from the rate of successful intubation, the duration of the intubation and complications during the intubation procedures as measured by bradycardia, desaturation episodes, and local trauma were also recorded. Both groups were thus compared on above mentioned outcomes.

RESULTS

The total number of neonates enrolled were 200, and the overall success rate (81% in the stylet group vs. 73% in the non-stylet group) was not statistically significant. Intubation time was however less, when stylet was used (16.2 ± 4.3 vs. 17.5 ± 5.0 s, p = .046). When the endotracheal tube size was 3 or less, the success rate was substantially higher in the stylet group (80%) than the non-stylet group (63%), p = .03. No statistical difference was recorded for bleeding and local trauma, though the esophageal intubation rate was higher when intubation was attempted without the stylet.

CONCLUSION

Endotracheal intubation using a stylet did not significantly improve the success rate of the procedure, however, intubation time significantly varied between groups and in different conditions. The rigidity and curvature provided by the stylet may facilitate the process of intubation when smaller caliber endotracheal tubes are used.

A rare case of huge frontoethmoidal encephalocele projecting through mouth, with cleft palate

Frontoethmoidal encephalocele represents protrusion of meninges and brain in a sac through a defect in the anterior skull base, mostly as swelling over the nose. Rarely it is associated with facial dysmorphism and palatal cleft. There are various perioperative concerns like airway difficulties, leaking from the swelling causing fluid and electrolyte disturbances, risk of infection, compression of the swelling causing a rise in intracranial pressure, bleeding, hypothermia, etc., In neonates, these challenges rise exponentially because of the inherent difficulties in dealing with this group of patients. Frontoethmoidal encephaloceles are common in low socioeconomic strata and are often missed in the antenatal period. We are reporting a rare case of frontoethmoidal encephalocele, with a huge swelling protruding through the cleft palate and occupying more than 50% of the face and oral cavity, making mask ventilation impossible.

Endotracheal Tube Size Adjustments Within Seven Days of Neonatal Intubation

BACKGROUND AND OBJECTIVES

Neonatal endotracheal tube (ETT) size recommendations are based on limited evidence. We sought to determine data-driven weight-based ETT sizes for infants undergoing tracheal intubation and to compare these with Neonatal Resuscitation Program (NRP) recommendations.

METHODS

Retrospective multicenter cohort study from an international airway registry. We evaluated ETT size changes (downsizing to a smaller ETT during the procedure or upsizing to a larger ETT within 7 days) and risk of procedural adverse outcomes associated with first-attempt ETT size selection when stratifying the cohort into 200 g subgroups.

RESULTS

Of 7293 intubations assessed, the initial ETT was downsized in 5.0% of encounters and upsized within 7 days in 1.5%. ETT downsizing was most common when NRP-recommended sizes were attempted in the following weight subgroups: 1000 to 1199 g with a 3.0 mm (12.6%) and 2000 to 2199 g with a 3.5 mm (17.1%). For infants in these 2 weight subgroups, selection of ETTs 0.5 mm smaller than NRP recommendations was independently associated with lower odds of adverse outcomes compared with NRP-recommended sizes. Among infants weighing 1000 to 1199 g: any tracheal intubation associated event, 20.8% with 2.5 mm versus 21.9% with 3.0 mm (adjusted OR [aOR] 0.62, 95% confidence interval [CI] 0.41-0.94); severe oxygen desaturation, 35.2% with 2.5 mm vs 52.9% with 3.0 mm (aOR 0.53, 95% CI 0.38-0.75). Among infants weighing 2000 to 2199 g: severe oxygen desaturation, 41% with 3.0 mm versus 56% with 3.5mm (aOR 0.55, 95% CI 0.34-0.89).

CONCLUSIONS

For infants weighing 1000 to 1199 g and 2000 to 2199 g, the recommended ETT size was frequently downsized during the procedure, whereas 0.5 mm smaller ETT sizes were associated with fewer adverse events and were rarely upsized.

Pharmacologic Adjuncts for Neonatal Tracheal Intubation: The Evidence Behind Premedication

Premedication such as analgesia, sedation, vagolytics, and paralytics may improve neonatal tracheal intubation success, reduce intubation-associated adverse events, and create optimal conditions for performing this high-risk and challenging procedure. Although rapid sequence induction including a paralytic agent has been adopted for intubations in pediatric and adult critical care, neonatal clinical practice varies. This review aims to summarize details of common classes of neonatal intubation premedication including indications for use, medication route, dosage, potential adverse effects in term and preterm infants, and reversal agents. In addition, this review shares the literature on national and international practice variations; explores evidence in support of establishing premedication guidelines; and discusses unique circumstances in which premedication use has not been established, such as during catheter-based or minimally invasive surfactant delivery. With increasing survival of extremely preterm infants, clear guidance for premedication use in this population will be necessary, particularly considering potential short- and long-term side effects of procedural sedation on the developing brain.

Value of the Hyomental Distance Measured With Ultrasound in Forecasting Difficult Laryngoscopy in Newborns

PURPOSE

Preoperative evaluations of difficult airways are imperative, especially in newborns. The hyomental distance is a reliable index for predicting difficult airways in adults. However, few studies have evaluated the value of the hyomental distance for predicting difficult airways in newborns. It is unclear whether the hyomental distance forecasts a restricted or difficult view when using direct laryngoscopy. We intended to develop an effective system for predicting difficult tracheal intubation in newborns.

DESIGN

A prospective observational clinical study.

METHODS

Newborns aged 0 to 28 days undergoing oral endotracheal intubation with direct laryngoscopy for elective surgery under general anesthesia were enrolled. The hyomental distance and hyoid level tissue thickness were assessed by ultrasound. Other parameters, such as the mandibular length and sternomental distance, were also evaluated before anesthesia. The glottic structure view under laryngoscopy was graded according to the Cormack-Lehane classification. The patients with Grade 1 and 2 laryngeal views were assigned to Group E. Those with Grade 3 and 4 views were assigned to Group D.

FINDINGS

A total of 123 newborns were recruited for our study. The incidence of poor visualization of the larynx during laryngoscopy in our study was 10.6%. The multifactor logistic regression results showed that the hyomental distance was a powerful predictor of difficult laryngoscopy (OR = 0.16, 95% CI 0.03-0.74, P = .019). The curve with the highest sensitivity and specificity and the maximum area under the curve (AUC) was the hyomental distance. The receiver operating characteristic (ROC) curve for the hyomental distance suggested that the best cut-off value was less than equal to 2.74 cm, with an AUC of 0.80 (95% CI 0.64-0.95).

CONCLUSIONS

It is noninvasive and feasible to accurately measure the hyomental distance with ultrasound in newborns, and the results are reliable. We believe that the hyomental distance measured with ultrasound could be used as a marker for predicting difficult laryngoscopy in newborns.

Neonatal airway management training using simulation-based educational methods and technology

Airway management is a fundamental component of neonatal critical care and requires a high level of skill. Neonatal endotracheal intubation (ETI), bag-mask ventilation, and supraglottic airway management are complex technical skills to acquire and continually maintain. Simulation training has emerged as a leading educational modality to accelerate the acquisition of airway management skills and train interprofessional teams. However, current simulation-based training does not always replicate neonatal airway management needed for patient care with a high level of fidelity. Educators still rely on clinical training on live patients. In this article, we will a) review the importance of simulation-based neonatal airway training for learners and clinicians, b) evaluate the available training modalities, instructional design, and challenges for airway procedural skill acquisition, especially neonatal ETI, and c) describe the human factors affecting the transfer of airway training skills into the clinical environment.

The neonatal airway

Safe and effective management of the neonatal airway requires knowledge, teamwork, preparation and experience. At baseline, the neonatal airway can present significant challenges to experienced neonatologists and paediatric anaesthesiologists, and increased difficulty can be due to anatomical abnormalities, physiological instability or increased situational stress. Neonatal airway obstruction is under recognised, and should be considered an emergency until the diagnosis and physiological implications are understood. When multiple types of difficulties are present or there are multiple levels of anatomical obstruction, the challenge increases exponentially. In these situations, preparation, multi-disciplinary teamwork and a consistent hospital-wide approach will help to reduce errors and morbidity.

Telesimulation for the Training of Medical Students in Neonatal Resuscitation

Background: Telesimulation may be an alternative to face-to-face simulation-based training. Therefore, we investigated the effect of a single telesimulation training in inexperienced providers. Methods: First-year medical students were recruited for this prospective observational study. Participants received a low-fidelity mannequin and medical equipment for training purposes. The one-hour telesimulation session was delivered by an experienced trainer and broadcast via a video conference tool, covering all elements of the neonatal resuscitation algorithm. After the telesimulation training, each student underwent a standardized simulated scenario at our Clinical Skills Center. Performance was video-recorded and evaluated by a single neonatologist, using a composite score (maximum: 10 points). Pre- and post-training knowledge was assessed using a 20-question questionnaire. Results: Seven telesimulation sessions were held, with a total of 25 students participating. The median performance score was 6 (5-8). The median time until the first effective ventilation breath was 30.0 s (24.5-41.0) and the median number of effective ventilation breaths out of the first five ventilation attempts was 5 (4-5). Neonatal resuscitation knowledge scores increased significantly. Conclusions: Following a one-hour telesimulation session, students were able to perform most of the initial steps of the neonatal resuscitation algorithm effectively while demonstrating notable mask ventilation skills.

Evaluation of Four Techniques to Administer Laryngeal Mask Airway

Background

Laryngeal mask airway (LMA) plays a crucial role in the field of modern anesthesia. There are different techniques to administer LMA. Here we aimed to compare the four methods of standard, 90° rotation, 180° rotation, and thumb placement in LMA mast placement.

Materials and Methods

This is a clinical trial that was performed on 257 candidates of elective surgical operations requiring general anesthesia. All patients were categorized into four groups of LMA placement with index finger (standard method), mask placement with 90° rotation, 180° rotation method, and thumb finger group. We collected data regarding the success rates of LMA placement, the need for any manipulation when placing the mask, LMA placement time, failure of mask placement, presence of blood on the LMA, and laryngospasm and sore throats 1 hour after surgery in patients.

Results

The 90° rotation method had a significantly higher first attempt success rate than that in the other three methods (98.4%, P = 0.02). Total success rate in 90° rotation method was also significantly higher than the other techniques (100%, P < 0.001). The need for any manipulation when placing the mask (1.6%, P = 0.01), presence of blood on the LMA mask (1.6%, P = 0.33), and frequency of sore throats 1 hour after surgery (21.9%, P = 0.14) were also lower in 90° rotation method than that in the other methods.

Conclusion

The 90° rotation method had significantly higher success rate and lower failure rate regarding the mask placement compared to other three methods.

Use of laryngeal mask for neonatal resuscitation in Brazil: A national survey

Background

The International Liaison Committee on Resuscitation suggests using the laryngeal mask airway (LMA) as an alternative to the face mask for performing positive pressure ventilation (PPV) in the delivery room in newborns ≥34 weeks. Because not much is known about the health professionals' familiarity in using LMA in Brazil, this study aimed to describe the health professionals' knowledge and practice of using LMA, who provide neonatal care in the country.

Methods

An online questionnaire containing 29 questions was sent to multi-healthcare professionals from different regions in the country through email and social media groups (WhatsApp®, Instagram®, Facebook®, ^and LinkedIn®). The participants anonymously answered the questions regarding their knowledge and expertise in using LMA to ventilate newborns in the delivery room.

Results

We obtained 749 responses from all the regions in Brazil, with 80% from health professionals working in public hospitals. Most respondents were neonatologists (73%) having > 15 years of clinical practice. Among the respondents, 92% recognized the usefulness of LMA for performing PPV in newborns, 59% did not have specific training in LMA insertion, and only 8% reported that they have already used LMA in the delivery room. In 90% of the hospitals, no written protocol was available to use LMA; and in 68% of the hospitals, LMA was not available for immediate use.

Conclusion

This nationwide survey showed that most professionals recognize the usefulness of LMA. However, the device is scarcely available and underused in the routine of ventilatory assistance for newborns in delivery rooms in Brazil.

Utilization of neonatal sedation and anesthesia: an SPR survey

BACKGROUND

There is little data regarding the use of sedation and anesthesia for neonatal imaging, with practice patterns varying widely across institutions.

OBJECTIVE

To understand the current utilization of sedation and anesthesia for neonatal imaging, and review the current literature and recommendations.

MATERIALS AND METHODS

One thousand, two hundred twenty-six questionnaire invitations were emailed to North American physician members of the Society for Pediatric Radiology using the Survey Monkey platform. Descriptive statistical analysis of the responses was performed.

RESULTS

The final results represented 59 institutions from 26 U.S. states, the District of Columbia and three Canadian provinces. Discrepant responses from institutions with multiple respondents (13 out of 59 institutions) were prevalent in multiple categories. Of the 80 total respondents, slightly more than half (56%) were associated with children's hospitals and 44% with the pediatric division of an adult radiology department. Most radiologists (70%) were cognizant of the neonatal sedation policies in their departments. A majority (89%) acknowledged awareness of neurotoxicity concerns in the literature and agreed with the validity of these concerns. In neonates undergoing magnetic resonance imaging (MRI), 46% of respondents reported attempting feed and bundle in all patients and an additional 46% attempt on a case-by-case basis, with most (35%) using a single swaddling attempt before sedation. Sedation was most often used for neonatal interventional procedures (93%) followed by MR (85%), nuclear medicine (48%) and computed tomography (31%). More than half of respondents (63%) reported an average success rate of greater than 50% when using neonatal sedation for MR.

CONCLUSION

Current practice patterns, policies and understanding of the use of sedation and anesthesia for neonatal imaging vary widely across institutions in North America, and even among radiologists from the same institution. Our survey highlights the need for improved awareness, education, and standardization at both the institutional level and the societal level. Awareness of the potential for anesthetic neurotoxicity and success of non-pharmacologic approaches to neonatal imaging is crucial, along with education of health care personnel, systematic approaches to quality control and improvement, and integration of evidence-based protocols into clinical practice.

Special consideration in neonatal resuscitation

Delivery room resuscitation of neonates is performed according to evidence-based neonatal resuscitation guidelines. Neonatal resuscitation guidelines focus on the resuscitation of newborns suffering from perinatal asphyxia. Special considerations are needed when resuscitating newborns in locations other than the delivery room and for newborns with congenital anomalies. In this review, we examine the resuscitation of newborns at home and in the emergency department and highlight special considerations for resuscitating newborns with specific congenital anomalies. In addition, we explore the resuscitation of neonates in the neonatal intensive care unit and discuss the potential use of pediatric advanced life support guidelines. Finally, we highlight the importance of simulation to prepare teams for neonatal resuscitations. This review aims to prepare healthcare professionals in all disciplines caring for neonates at risk for requiring resuscitation under special circumstances.

Comparison of two sizes of GlideScope® blades in tracheal intubation of infants: a randomised clinicaltrial☆

BACKGROUND

The appropriate size of GlideScope® blade for tracheal intubation in neonates and premature infants has not been established. We evaluated the impact of the size of the GlideScope® blade on the time taken for intubation in infants weighing 2.5-3.6 kg.

METHODS

Sixty infants weighing 2.5-3.6 kg were randomly assigned to use of the size 1 blade (n=30) or the size 2 blade (n=30). The primary outcome was the time taken to intubate. Components related to the laryngoscopic view which could affect the duration of the intubating process were also analysed.

RESULTS

The time required for tracheal intubation was shorter with the size 2 blade than with the size 1 blade (16 [14-20] s vs 22 [18-25] s, P=0.002; median difference=-5; 95% confidence interval, -7 to -2). The rate at which the tip of the tracheal tube was located at the centre of the laryngeal inlet was higher with the size 2 blade than with the size 1 blade (83% vs 40%, P<0.001). Correlation analysis indicated that the time required to find the tip of the tube was related to how far the lower border of the arytenoid cartilages was located from the mid-horizontal line of the monitor (r=0.28, P=0.033).

CONCLUSION

Use of the size 2 blade significantly reduced the time required to intubate the trachea, compared with the size 1 GlideScope® blade in infants.

CLINICAL TRIAL REGISTRATION

KCT 0003867.

Cuffed versus uncuffed endotracheal tubes for neonates

BACKGROUND

Endotracheal intubation is a commonly performed procedure in neonates, the risks of which are well-described. Some endotracheal tubes (ETT) are equipped with a cuff that can be inflated after insertion of the ETT in the airway to limit leak or aspiration. Cuffed ETTs have been shown in larger children and adults to reduce gas leak around the ETT, ETT exchange, accidental extubation, and exposure of healthcare workers to anesthetic gas during surgery. With improved understanding of neonatal airway anatomy and the widespread use of cuffed ETTs by anesthesiologists, the use of cuffed tubes is increasing in neonates.

OBJECTIVES

To assess the benefits and harms of cuffed ETTs (inflated or non-inflated) compared to uncuffed ETTs for respiratory support in neonates.

SEARCH METHODS

We searched CENTRAL, PubMed, and CINAHL on 20 August 2021; we also searched trial registers and checked reference lists to identify additional studies.

SELECTION CRITERIA

We included randomized controlled trials (RCTs), quasi-RCTs, and cluster-randomized trials comparing cuffed (inflated and non-inflated) versus uncuffed ETTs in newborns. We sought to compare 1. inflated, cuffed versus uncuffed ETT; 2. non-inflated, cuffed versus uncuffed ETT; and 3. inflated, cuffed versus non-inflated, cuffed ETT.

DATA COLLECTION AND ANALYSIS

We used the standard methods of Cochrane Neonatal. Two review authors independently assessed studies identified by the search strategy for inclusion, extracted data, and assessed risk of bias. We used the GRADE approach to assess the certainty of evidence.

MAIN RESULTS

We identified one eligible RCT for inclusion that compared the use of cuffed (inflated if ETT leak greater than 20% with cuff pressure 20 cm H₂O or less) versus uncuffed ETT. The author provided a spreadsheet with individual data. Among 76 infants in the original manuscript, 69 met the inclusion and exclusion criteria for this Cochrane Review. We found possible bias due to lack of blinding and other bias. We are very uncertain about frequency of postextubation stridor, because the confidence intervals (CI) of the risk ratio (RR) were very wide (RR 1.36, 95% CI 0.35 to 5.25; risk difference (RD) 0.03, -0.11 to 0.18; 1 study, 69 participants; very low-certainty evidence). No neonate was diagnosed with postextubation subglottic stenosis; however, endoscopy was not available to confirm the clinical diagnosis. We are very uncertain about reintubation for stridor or subglottic stenosis because the CIs of the RR were very wide (RR 0.27, 95% CI 0.01 to 6.49; RD -0.03, 95% CI -0.11 to 0.05; 1 study, 69 participants; very low-certainty evidence). No neonate had surgical intervention (e.g. endoscopic balloon dilation, cricoid split, tracheostomy) for stridor or subglottic stenosis (1 study, 69 participants). Neonates randomized to cuffed ETT may be less likely to have a reintubation for any reason (RR 0.06, 95% CI 0.01 to 0.45; RD -0.39, 95% CI -0.57 to -0.21; number needed to treat for an additional beneficial outcome 3, 95% CI 2 to 5; 1 study, 69 participants; very low-certainty evidence). We are very uncertain about accidental extubation because the CIs of the RR were wide (RR 0.82, 95% CI 0.12 to 5.46; RD -0.01, 95% CI -0.12 to 0.10; 1 study, 69 participants; very low-certainty evidence). We are very uncertain about all-cause mortality during initial hospitalization because the CIs of the RR were extremely wide (RR 2.46, 95% CI 0.10 to 58.39; RD 0.03, 95% CI -0.05 to 0.10; 1 study, 69 participants; very low-certainty evidence). There is one ongoing trial. We classified two studies as awaiting classification because outcome data were not reported separately for newborns and older infants.

AUTHORS' CONCLUSIONS

Evidence for comparing cuffed versus uncuffed ETTs in neonates is limited by a small number of babies in a single RCT with possible bias. There is very low certainty evidence for all outcomes of this review. CIs of the estimate for postextubation stridor were wide. No neonate had clinical evidence for subglottic stenosis; however, endoscopy results were not available to assess the anatomy. Additional RCTs are necessary to evaluate the benefits and harms of cuffed ETTs (inflated and non-inflated) in the neonatal population. These studies must include neonates and be conducted both for short-term use (in the setting of the operating room) and chronic use (in the setting of chronic lung disease) of cuffed ETTs.

A multicenter, randomized controlled, non-inferiority trial, comparing nasal continuous positive airway pressure with nasal intermittent positive pressure ventilation as primary support before minimally invasive surfactant administration for preterm infants with respiratory distress syndrome (the NIV-MISA-RDS trial): Study protocol

BACKGROUND

Non-invasive ventilation (NIV) treatment has been developed to minimize lung damage and to avoid invasive mechanical ventilation (IMV) in preterm infants, especially in those with a gestational age of <30 weeks. Our hypothesis is that for preterm infants <30 weeks with potential to develop respiratory distress syndrome (RDS), nasal continuous positive airway pressure (NCPAP) is non-inferior to the nasal intermittent positive pressure ventilation (NIPPV) as primary respiratory support before minimal invasive surfactant administration (MISA).

METHODS AND DESIGN

The NIV-MISA-RDS trial is planned as an unblinded, multicenter, randomized, non-inferiority trial at 14 tertiary neonatal intensive care units (NICUs) in China. Eligible infants are preterm infants of 24-29⁺⁶ weeks of gestational age who have spontaneous breaths at birth and require primary NIV support for RDS. Infants are randomized 1:1 to treatment with either NCPAP or NIPPV once admitted into NICUs. If an infant presents progressively aggravated respiratory distress and is clinically diagnosed as having RDS, pulmonary surfactant will be supplemented by MISA in the first 2 h of life. The primary outcome is NIV treatment failure within 72 h after birth. With a specified non-inferiority margin of 10%, using a two-sided 95% CI and 80% power, the study requires 480 infants per group (in total 960 infants).

DISCUSSION

Current evidence shows that NIV and MISA may be the most effective strategy for minimizing IMV in preterm infants with RDS. However, there are few large randomized controlled trials to compare the effectiveness of NCPAP and NIPPV as the primary respiratory support after birth and before surfactant administration. We will conduct this trial to test the hypothesis that NCPAP is not inferior to NIPPV as the initial respiratory support in reducing the use of IMV in premature infants who have spontaneous breaths after birth and who do not require intubation in the first 2 h after birth. The study will provide clinical data for the selection of the initial non-invasive ventilation mode in preterm infants with a gestational age of <30 weeks with spontaneous breaths after birth.

CLINICAL TRIAL REGISTRATION

https://register.clinicaltrials.gov, identifier: NCT05137340.

Anatomic accuracy, physiologic characteristics, and fidelity of very low birth weight infant airway simulators

BACKGROUND

Medical simulation training requires realistic simulators with high fidelity. This prospective multi-center study investigated anatomic precision, physiologic characteristics, and fidelity of four commercially available very low birth weight infant simulators.

METHODS

We measured airway angles and distances in the simulators Premature AirwayPaul (SIMCharacters), Premature Anne (Laerdal Medical), Premie HAL S2209 (Gaumard), and Preterm Baby (Lifecast Body Simulation) using computer tomography and compared these to human cadavers of premature stillbirths. The simulators' physiologic characteristics were tested, and highly experienced experts rated their physical and functional fidelity.

RESULTS

The airway angles corresponded to those of the reference cadavers in three simulators. The nasal inlet to glottis distance and the mouth aperture to glottis distance were only accurate in one simulator. All simulators had airway resistances up to 20 times higher and compliances up to 19 times lower than published reference values. Fifty-six highly experienced experts gave three simulators (Premature AirwayPaul: 5.1 ± 1.0, Premature Anne 4.9 ± 1.1, Preterm Baby 5.0 ± 1.0) good overall ratings and one simulator (Premie HAL S2209: 2.8 ± 1.0) an unfavorable rating.

CONCLUSION

The simulator physiology deviated significantly from preterm infants' reference values concerning resistance and compliance, potentially promoting a wrong ventilation technique.

IMPACT

Very low birth weight infant simulators showed physiological properties far deviating from corresponding patient reference values. Only ventilation with very high peak pressure achieved tidal volumes in the simulators, as aimed at in very low birth weight infants, potentially promoting a wrong ventilation technique. Compared to very low birth weight infant cadavers, most tested simulators accurately reproduced the anatomic angular relationships, but their airway dimensions were relatively too large for the represented body. The more professional experience the experts had, the lower they rated the very low birth weight infant simulators.

Prognostic factors in the management of pediatric subglottic stenosis

OBJECTIVE

We report outcomes of endoscopic interventions in the management of pediatric subglottic stenosis (SGS), and factors that lead to open airway reconstruction.

METHODS

A retrospective cohort review of all pediatric patients with SGS, treated by a single surgeon, at a tertiary academic medical center from 2012 to 2020 was conducted. Variables recorded included patient demographics, initial grade of stenosis, gestational age, length of intubation, comorbidities as well as total number of interventions.

RESULTS

A total of 47 patients were included in the study, of which 51% (n = 24) were female. Laryngotracheal reconstruction (LTR) was performed in 49% (n = 23) of patients. Decannulation was achieved in 25 of 32 tracheostomized patients. Fifteen patients did not have tracheostomy. There was a significant difference in gestational age (28.7 ± 5.36 vs 33.2 ± 6.13), initial grade of stenosis (2.3 ± 0.82 vs 1.6 ± 0.88), and total number of interventions (5.7 ± 2.8 vs 2.3 ± 1.5) when stratifying patients proceeding to LTR versus not (p < 0.05). There was no significant difference, however, in the length of intubation between the two groups. Of the comorbidities recorded, none were found to have a significant impact on the outcome.

CONCLUSION

Subglottic stenosis is a challenging condition to treat, often requiring multiple interventions including LTR. We propose a set of risk factors that may assist in the treatment of SGS patients with certain comorbidities to minimize interventions and maximize outcomes.

Drug delivery to the pediatric upper airway

Pediatric upper airway disorders are frequently life-threatening and require precise assessment and intervention. Targeting these pathologies remains a challenge for clinicians due to the high complexity of pediatric upper airway anatomy and numerous potential etiologies; the most common treatments include systemic delivery of high dose steroids and antibiotics or complex and invasive surgeries. Furthermore, the majority of innovative airway management technologies are only designed and tested for adults, limiting their widespread implementation in the pediatric population. Here, we provide a comprehensive review of the most recent challenges of managing common pediatric upper airway disorders, describe the limitations of current clinical treatments, and elaborate on how to circumvent those limitations via local controlled drug delivery. Furthermore, we propose future advancements in the field of drug-eluting technologies to improve pediatric upper airway management outcomes.

Developmental Functional Modules in Infant Vocalizations

Purpose Developmental functional modules (DFMs) are biological modules that are defined by their structural (morphological), functional, or developmental elements, and, in some cases, all three of these. This review article considers the hypothesis that vocal development in the first year of life can be understood in large part with respect to DFMs that characterize the speech production system. Method Literature is reviewed on relevant embryology, orofacial reflexes, craniofacial muscle properties, stages of vocal development, and related topics to identity candidates for DFMs. Results The following DFMs are identified and described: laryngeal, pharyngo-laryngeal, mandibular, velopharyngeal, labial complex, and lingual complex. These DFMs and their submodules, considered along with phenomena such as rhythmic movements, account for several well-documented features of vocal development in the first year of life. The proposed DFMs, rooted in embryologic, histologic, and kinematic properties, serve as low-dimensional control variables for the developing vocal tract. Each DFM is semi-autonomous but interacts with other DFMs to produce patterns of vocal behavior. Discussion Considered in relation to contemporary profiles and models of vocal development in the first year of life, DFMs have interpretive and explanatory value. DFMs complement other approaches in the study of infant vocalizations and are grounded in biology.

Management of the Unexpected Difficult Airway in Neonatal Resuscitation

A "difficult airway situation" arises whenever face mask ventilation, laryngoscopy, endotracheal intubation, or use of supraglottic device fail to secure ventilation. As bradycardia and cardiac arrest in the neonate are usually of respiratory origin, neonatal airway management remains a critical factor. Despite this, a well-defined in-house approach to the neonatal difficult airway is often lacking. While a recent guideline from the British Pediatric Society exists, and the Scottish NHS and Advanced Resuscitation of the Newborn Infant (ARNI) airway management algorithm was recently revised, there is no Norwegian national guideline for managing the unanticipated difficult airway in the delivery room (DR) and neonatal intensive care unit (NICU). Experience from anesthesiology is that a "difficult airway algorithm," advance planning and routine practicing, prepares the resuscitation team to respond adequately to the technical and non-technical stress of a difficult airway situation. We learned from observing current approaches to advanced airway management in DR resuscitations in a university hospital and make recommendations on how the neonatal difficult airway may be managed through technical and non-technical approaches. Our recommendations mainly pertain to DR resuscitations but may be transferred to the NICU environment.

Airway emergency management in a pediatric hospital before and during the COVID-19 pandemic

OBJECTIVE

Children's hospitals frequently care for infants with various life-threatening airway anomalies. Management of these infants can be challenging given unique airway anatomy and potential malformations. Airway emergency management must be immediate and precise, often demanding specialized equipment and/or expertise. We developed a Neonatal-Infant Emergency Airway Program to improve medical responses, communication, equipment usage and outcomes for all infants requiring emergent airway interventions in our neonatal and infant intensive care unit (NICU).

PATIENTS AND METHODS

All patients admitted to our quaternary NICU from 2008 to 2019 were included in this study. Our program consisted of a multidisciplinary airway response team, pager system, and emergency equipment cart. Respiratory therapists present at each emergency event recorded specialist response times, equipment utilization, and outcomes. A multidisciplinary oversite committee reviewed each incident.

RESULTS

Since 2008, there were 159 airway emergency events in our NICU (~12 per year). Mean specialist response times decreased from 5.9 ± 4.9 min (2008-2012, mean ± SD) to 4.3 ± 2.2 min (2016-2019, p = 0.12), and the number of incidents with response times >5 min decreased from 28.8 ± 17.8% (2008-2012) to 9.3 ± 11.4% (2016-2019, p = 0.04 by linear regression). As our program became more standardized, we noted better equipment availability and subspecialist communication. Few emergency situations (n = 9, 6%) required operating room management. There were 3 patient deaths (2%).

CONCLUSIONS

Our airway safety program, including readily available specialists and equipment, facilitated effective resolution of airway emergencies in our NICU and multidisciplinary involvement enabled rapid and effective changes in response to COVID-19 regulations. A similar program could be implemented in other centers.

A comparison of videolaryngoscopy using standard blades or non-standard blades in children in the Paediatric Difficult Intubation Registry

BACKGROUND

The design of a videolaryngoscope blade may affect its efficacy. We classified videolaryngoscope blades as standard and non-standard shapes to compare their efficacy performing tracheal intubation in children enrolled in the Paediatric Difficult Intubation Registry.

METHODS

Cases entered in the Registry from March 2017 to January 2020 were analysed. We compared the success rates of initial and eventual tracheal intubation, complications, and technical difficulties between the two groups and by weight stratification.

RESULTS

Videolaryngoscopy was used in 1313 patients. Standard and non-standard blades were used in 529 and 740 patients, respectively. Both types were used in 44 patients. In children weighing <5 kg, standard blades had significantly greater success than non-standard blades at initial (51% vs 26%, P=0.002) and eventual (81% vs 58%, P=0.002) attempts at tracheal intubation. In multivariable logistic regression analysis, standard blades had 3-fold greater odds of success at initial tracheal intubations compared with non-standard blades (adjusted odds ratio 3.0, 95% confidence interval): 1.32-6.86, P=0.0009). Standard blades had 2.6-fold greater odds of success at eventual tracheal intubation compared with non-standard blades in children weighing <5 kg (adjusted odds ratio 2.6, 95% confidence interval: 1.08-6.25, P=0.033). There was no significant difference found in children weighing ≥5 kg.

CONCLUSIONS

In infants weighing <5 kg, videolaryngoscopy with standard blades was associated with a significantly greater success rate than videolaryngoscopy with non-standard blades. Videolaryngoscopy with a standard blade is a sensible choice for tracheal intubation in children who weigh <5 kg.