Failed Intubation Research Articles

Comparison of fibre-optic-guided endotracheal intubation through a supraglottic airway device versus hyperangulated video laryngoscopy by emergency physicians: A randomised controlled study in cadavers

Background: After failed endotracheal intubation, using direct laryngoscopy, rescued using a supraglottic airway device, the choice of subsequent method to secure a definitive airway is not clearly determined. Objective: The aim of this study was to compare the time to intubation using a fibre-optic airway scope, to guide an endotracheal tube through the supraglottic airway device, with a more conventional approach using a hyperangulated video laryngoscope. Methods: A single-centre randomised controlled trial was undertaken. The population studied were emergency physicians working in an adult major trauma centre. The intervention was intubation through a supraglottic airway device guided by a fibre-optic airway scope. The comparison was intubation using a hyperangulated video laryngoscope. The primary outcome was time to intubation. The trial was registered with ANZCTR.org.au (ACTRN12621000018819). Results: Four emergency physicians completed intubations using both of the two airway devices on four cadavers for a total of 32 experiments. The mean time to intubation was 14.0 s (95% confidence interval = 11.1–16.8) in the hyperangulated video laryngoscope group compared with 29.2 s (95% confidence interval = 20.7–37.7) in the fibre-optic airway scope group; a difference of 15.2 s (95% confidence interval = 8.7–21.7, p < 0.001). All intubations were completed within 2 min, and there were no equipment failures or evidence of airway trauma. Conclusion: Successful intubation of the trachea without airway trauma by emergency physicians in cadavers is achievable by either fibre-optic airway scope via a supraglottic airway device or hyperangulated video laryngoscope. Hyperangulated video laryngoscope was statistically but arguably not clinically significantly faster than fibre-optic airway scope via supraglottic airway device.

Difficult and Failed Tracheal Intubation in Obstetrics: A Seven-year Review in a Saudi Maternity Hospital

Background: Airway difficulty is a major contributor to mortality and morbidity during caesarean section (CS) under general anaesthesia. Though general anaesthesia is safe, the changes associated with pregnancy make securing airway more difficult. The purpose of this study was to investigate the pattern and factors associated with airway difficulty in the parturient in the region. Methods: This was a retrospective, descriptive study of parturients who suffered airway difficulty during caesarean section under general anaesthesia over seven-year period. Their medical records were reviewed and data collected included total CS done under general anaesthesia, age, weight, nature of airway difficulty, coexisting diseases, and timing of surgery, outcomes and Apgar scores. Data was analysed using SPSS version 23 for Windows®. Results: General anaesthesia was used in 51.3% of 10,275 CS with 42 documented as “difficult airway” giving 0.8% incidence and incidence ratio of 1:125. Failed intubation was recorded in 58% while difficult intubation was 42% of those with difficult airway. Among these, the CS was in 55% of cases “emergent”. The mean age was 33.32±5.96 years. The weight ranged from 60 to 163kg. Over 58% weighed more than 90kg. In 50% of cases, the airway was rescued with LMA and in 50%, reintubation succeeded. Outcome was good for mother and fetus in all cases. Conclusion: Obstetric airway difficulty remains a valid concern. Effort should be made to use regional anaesthesia to reduce the risk. High awareness and preparation during obstetric general anaesthesia are recommended.

Canadian Airway Focus Group updated consensus-based recommendations for management of the difficult airway: part 1. Difficult airway management encountered in an unconscious patient

PurposeSince the last Canadian Airway Focus Group (CAFG) guidelines were published in 2013, the literature on airway management has expanded substantially. The CAFG therefore re-convened to examine this literature and update practice recommendations. This first of two articles addresses difficulty encountered with airway management in an unconscious patient.SourceCanadian Airway Focus Group members, including anesthesia, emergency medicine, and critical care physicians, were assigned topics to search. Searches were run in the Medline, EMBASE, Cochrane Central Register of Controlled Trials, and CINAHL databases. Results were presented to the group and discussed during video conferences every two weeks from April 2018 to July 2020. These CAFG recommendations are based on the best available published evidence. Where high-quality evidence was lacking, statements are based on group consensus.Findings and key recommendationsMost studies comparing video laryngoscopy (VL) with direct laryngoscopy indicate a higher first attempt and overall success rate with VL, and lower complication rates. Thus, resources allowing, the CAFG now recommends use of VL with appropriately selected blade type to facilitate all tracheal intubations. If a first attempt at tracheal intubation or supraglottic airway (SGA) placement is unsuccessful, further attempts can be made as long as patient ventilation and oxygenation is maintained. Nevertheless, total attempts should be limited (to three or fewer) before declaring failure and pausing to consider “exit strategy” options. For failed intubation, exit strategy options in the still-oxygenated patient include awakening (if feasible), temporizing with an SGA, a single further attempt at tracheal intubation using a different technique, or front-of-neck airway access (FONA). Failure of tracheal intubation, face-mask ventilation, and SGA ventilation together with current or imminent hypoxemia defines a “cannot ventilate, cannot oxygenate” emergency. Neuromuscular blockade should be confirmed or established, and a single final attempt at face-mask ventilation, SGA placement, or tracheal intubation with hyper-angulated blade VL can be made, if it had not already been attempted. If ventilation remains impossible, emergency FONA should occur without delay using a scalpel-bougie-tube technique (in the adult patient). The CAFG recommends all institutions designate an individual as “airway lead” to help institute difficult airway protocols, ensure adequate training and equipment, and help with airway-related quality reviews.

P.57 Retrospective review of conduct of general anaesthesia for caesarean section in a tertiary maternity unit

Introduction: With the increasing use of neuraxial techniques, general anaesthesia for caesarean section is now a relatively rare occurrence. However, there remain a small number of clinical scenarios where it is unavoidable. Obstetric patients have consistently been shown to be at higher risk of failed intubation,1 aspiration complications and awareness under anaesthesia.2 We conducted this study to review current practises within our institution in regards to conduct of general anaesthesia for caesarean section.

The evaluation of using new trachea and skin manikins for practicing emergency anterior neck access

Emergency anterior neck access may be performed if intubation and ventilation fail. Practicing this life-saving procedure with manikins before facing a real-life emergency anterior neck access is required to do this procedure successfully when we encounter a difficult airway situation. The current manikins are expensive and thus are sometimes difficult to acquire in low-cost settings such as Thailand. We devise a cost-effective training manikin using less expensive materials but retaining the simple design of the trachea and skin areas which are flexible polyurethane (PU) foam and silicone, but which still had the same utility as the current manikins. Five items were evaluated, and then scores were rated by experienced physicians from 1 to 5 points for each item, 1 being the least and 5 the highest. The mean score concerning the appropriate size of the manikins was 4.55 ± 0.56. The mean score of the ease of use for practicing was 4.58 ± 0.59. The mean score of the similarity of the skin of the manikins to human skin was 3.85 ± 0.66. The mean score of the similarity of the trachea of the manikins to the human trachea was 3.80 ± 0.69. The mean score of the sensation of inserting the tube in the manikin compared to a real trachea was 3.90 ± 0.67. The mean overall benefit score of practicing on the manikins was 4.38 ± 0.45. Our trial indicates that this low-cost and simply designed manikin can be useful for practicing emergency airway management procedures to save patients who are struggling with lack of oxygen or intubation failure or failure of ventilation or other airway equipment such as endotracheal intubation and supraglottic airway devices (SGA).

Role of Preoperative Multidetector Computed Tomography Airway Reconstruction in Anaesthetic Management of Mucopolysaccharidosis Type IV

Mucopolysaccharidoses (MPS) are a group of lysosomal storage disorders that often present with a difficult airway. The trachea is usually narrowed and flattened, making the choice of correct technique and endotracheal tube (ETT) size crucial. Multidetector computed tomography (MDCT) images have been used to assess the airway of children who are considered at risk for difficult intubation. However, it has not been standardised in preoperative assessment of MPS. We report a case in whom after failed fibreoptic intubation, titrated doses of injection propofol were given and direct laryngoscopy was performed. A 6.0 mm internal diameter (ID) and later a 5.0 mm ID ETT were tried but could not be negotiated. Subsequently, the airway was secured with a 4.5 mm ID ETT. Postoperatively, MDCT airway reconstruction demonstrated that the narrowest part of airway measured 4.3 mm. Anaesthesiologists often face a multitude of challenges in these patients. Our experience gained in retrospect suggests that a detailed preoperative evaluation including MDCT airway reconstruction, followed by meticulous planning, is essential for a safe outcome.

Low-Dose of Rocuronium During Thyroid Surgery: Effects on Intraoperative Nerve-Monitoring and Intubation

BackgroundIntraoperative Neurophysiological Monitoring (IONM) reduces the incidence of Recurrent Laryngeal Nerve (RLN) injuries during thyroid surgery. To preserve nerve function, long acting neuromuscular blocking agents (NMBA) should be avoided. However, NMBA are necessary for laryngoscopy and endotracheal intubation. We designed this double-blinded, randomized, placebo-controlled trial to assess if a low-dose of rocuronium given at intubation would affect the IONM data recorded before the thyroid dissection. MethodsHundred patients undergoing elective thyroid surgery were randomized to receive either 0.3 mg kg−1 of low dose rocuronium (intervention) or no-NMBA (control). Intubation was performed with video-laryngoscopy. IONM was placed on RLN and nerve stimulation was performed before and after thyroid dissection. The presence of a valid amplitude prior to dissection was defined when the IONM signal was >100 μV. Occurrence of difficult laryngoscopy was reported together with intubation details including time, difficulty and failure. The lowest peripheral saturation (SpO2) and the number of desaturation episodes during the intubation were also registered. ResultsNo patients showed impaired IONM signal before dissection in both groups. Cormack-Lehane grade was higher in the intervention group (11;2) compared to control one (11;1; P = 0.046). No-NMBA patients had increased number of difficult laryngoscopies (21% versus 6%, P = 0.041) and intubations (34% versus 8%; P = 0.003) as well as a longer time to intubation (78 [55; 175] versus 55 [31; 110] sec; P = 0.006). Lower values of peripheral SpO2 during intubation attempt were registered in the no NMBA group (99 [97; 100] versus 99 [99; 100] %; P = 0.020). However, the number of intubation failure was similar between groups (p=0.495). ConclusionsLow-dose of rocuronium does not compromise pre-dissection IONM signal and improves intubation condition when compared to a relaxant free strategy.

Airway Management of Giant Occipital Meningoencephalocele Removal

Abstract Cephalocele refers to defects in the skull and dura with extensions from intracranial to extracranial structures. Cephalocele is divided into four types which are meningoencephalocele, meningocele, atretic encephalocele, and gliocele. Encephalocele is a head's contents herniation through a defect in the skull. Meningocele is a herniation sac that contains cerebrospinal fluid and nerve elements. Meningoencephalocele is a prominent herniation of the meningeal part, nerve elements, and brain tissue in a sac that protrudes through a defect in the skull. In Southeast Asia, the incidence of meningoencephalocele is estimated to occur in 1 in 5000 live births. The occipital bone is the most common location of cephalocele. The neurological outcome of malformations that occur depends on the size of the sac formed, the nerve tissue involved, hydrocephalus, related infections, and other pathological conditions involved. Perioperative preparation must be well made by an anesthesiologist based on airway management, fluid balance, and hypothermia prevention. The main challenge of anesthesia in the management of the occipital meningoencephalocele is securing the airway. Pediatric patients have low functional reserve volume, and failure of tracheal intubation can cause hypoxemia, bradycardia, and even heart attacks. Improper positioning and limited neck extension can complicate endotracheal intubation.

667 Necrotizing Soft Tissue Infection Within 48 Hours Post-Scald Burn: A Rare Presentation

Abstract Introduction We report a case of a patient with a burn injury who developed a devastating necrotizing soft tissue infection (NSTI) early in the post-burn period. Methods An elderly male was admitted to an ABA verified burn centre after sustaining a 20% scald burn to his back and right upper extremity. He was found in the bathtub; a fall was suspected based on his history of Parkinson’s disease and a finding of bruising to his bilateral knees. Initially, his hospital course was uneventful apart from an elevated creatine kinase, which decreased with adequate resuscitation without signs or symptoms of compartment syndrome. Thirty-six hours following his admission, he developed rapid onset of progressively worsening renal function, respiratory requiring intubation, mechanical ventilation, and circulatory failure requiring vasopressor support. After ruling out other causes of shock and upon re-examination of his burns there were clinical signs of a rapidly advancing necrotizing soft tissue infection. He was taken urgently to the operating room for aggressive debridement of nonviable tissue. He underwent a right shoulder disarticulation and extensive debridement of the right chest, abdomen, and back. Intra-operative tissue samples and preoperative blood cultures were positive for Group A Streptococcus. The patient was predicted to require multiple operations and a prolonged hospital stay. Despite these interventions, his prognosis was poor. The family and the treatment team, in the context of the patient’s previous independent functioning, revised his goals of care on his first post-operative day. Life-sustaining treatment was withdrawn, and comfort care measures were implemented. The patient passed away two days later. Results We report a case of a patient with a burn injury who developed a devastating NSTI early in the post-burn period within 36–48 hours of presentation to a burn center. Soft-tissue infections in the immediate post-burn period are rare unless there is subsequent contamination. Burned tissue contains a large amount of necrotic tissue and protein-rich wound exudate, which provides a rich growth medium for bacteria. This, in addition to the immunosuppression secondary to the burn insult, favors the development of infection. NSTI in the context of thermal injury is a rare phenomenon and in the few reported cases in burn patients, necrotizing infections occurred closer to two weeks following the initial injury. Conclusions Necrotizing soft tissue infections are entities with a rapid and devastating course. The diagnosis is challenging, and occlusive dressings may contribute to a delay in diagnosis in burns. Acute hemodynamic compromise without any obvious cause should raise the suspicion for a necrotizing soft tissue infection and lead to early exposure of wounds in burn patients.

Comparison of Mc Grath-MAC and C-MAC video laryngoscopes for intubation in a COVID simulated mannequin by novice users wearing face protective gear

Introduction:Intubation in COVID patients is challenging. Various guidelines suggest the use of video-laryngoscope (VL) as the first device to aid intubation in a COVID patient. The best VL to facilitate intubation in such a setting especially by novices is not ascertained. We compared intubation characteristics by two VL's (McGrath-MAC and C-MAC) for intubation in a COVID simulated mannequin by novices.Methodology:This prospective randomized manikin-based crossover study was done in thirty medical professionals with no previous experience of intubation with VL. All participants were trained on Laerdel airway management trainer and were allowed 5 practice sessions with each scope with an intubation box while wearing face protective personal protective equipment (PPE). Participants were randomized into two groups of 15 each, one group performed the intubation first with McGrath and the other with C-MAC before crossing over.Results:The mean (S. D.) time to intubation was similar with both McGrath-VL and CMAC VL [31.33 (14.72) s vs 26.47 (8.5) s, P = (p-0.063)]. POGO score [mean (S. D.)] was better with CMAC [81.33 (16.24) vs 60.33 (14.73), p-0.00. The majority of the users preferred C-MAC VL for intubation (93.33%). The incidence of failed intubation and multiple attempts at intubating were similar with the two scopes.Conclusion:The time to intubation was similar with both VL's but the majority of novices preferred CMAC probably due to a bigger screen that helped them to have a better view of glottis in the COVID simulated mannequin.

Incidence, Complications, and Factors Associated with Out-of-Hospital First Attempt Intubation Failure in Adult Patients: A Secondary Analysis of the CURASMUR Trial Data

Objectives: The objectives of this study were to evaluate first attempt intubation failure rate, its associated factors, and its related complications in out-of-hospital emergency setting, when emergency physicians perform standardized airway management using rapid sequence intubation in adult patients. Material and methods: The present study was a substudy of the Succinylcholine versus Rocuronium for out-of-hospital Emergency Intubation (CURASMUR) Trial, which compared Succinylcholine and Rocuronium used for Rapid sequence intubation. First attempt Intubation failure rate and early intubation related complications were recorded. We used multivariable logistic regression analysis to determine first intubation failure associated factors. Results: A total of 1230 patients were included with mean age of 55.9 +/- 19 years. First attempt intubation failure was recorded in 285 (23.2%) patients. The occurrence of a first attempt intubation failure was independently associated with history of ear, nose, and throat neoplasia (OR 2.20, CI 95% 1.06–4.60). Early intubation related complications were more frequent in case of first attempt intubation failure: 80 of 285 (28.4%) in patients with first attempt intubation failure and 185 of 945 (19.6%) in patients with successful first attempt intubation [OR 1.44; CI 95%, 1.11–1.87]. Conclusion: Based on a large multicenter study on out-of-hospital tracheal intubation of adult patients, we found that first attempt intubation failure rate was high and that history of ear, nose, and throat (ENT) neoplasia was an independent associated factor. Failure in first intubation attempt was associated with significantly more intubation related complications.

A Consecutive Case Series of Rescue Intubations With the Articulating Total Control Introducer for Precision Tracheal Access

Effective rescue after failed intubation is important to limit the number of attempts and patient risk. Nothing is known about the Total Control Introducer's (TCI) effectiveness as an intubation rescue device. A single system's airway management database was studied. The TCI was used for rescue in 34 cases. Overall success was 33 of 34 (97%). First-pass success was 32 of 33 (97%). First-pass rescue was successful in 12 of 12 (100%) after video and direct laryngoscopy had failed. In this case series, the TCI was found to be a highly effective rescue technique after failed direct and video laryngoscopy.

A simulation-based study evaluating the preparedness of interns' post-anaesthesia rotation in managing a failed obstetric intubation scenario: Is our training good enough?

Difficult or failed intubation of obstetric patients may be up to 8 times higher than in general surgical patients. A decline in obstetric intubation opportunities may be a contributing factor, resulting in reduced training opportunities for junior doctors, who therefore do not acquire airway management skills. To assess post-anaesthesia rotation interns' preparedness to manage a difficult/failed obstetric airway scenario. We recruited 49 interns, obtained informed consent and individually assessed them on a simulation-based scenario using a high-fidelity manikin. Two independent assessors scored participants using a checklist assessment and a global rating scale. After the simulation-based scenario, participants completed a questionnaire on their internship training, rated the simulation experience and received debriefing. The borderline regression method was used to determine the checklist pass mark. Analysis showed that 40% of interns passed. Correlation between assessors was strong for checklist scores and global ratings. The main reasons for failing were repeated attempts at intubation and failure to optimise the intubating position or conditions. There was concern regarding the infrequent use of a supraglottic airway device as a rescue. Twenty-eight interns had performed <5 general obstetric anaesthetic procedures. There are concerns regarding adequate anaesthetic preparation for interns to manage a difficult/failed intubation scenario in a full-term pregnancy. Despite the Essential Steps in Managing Obstetric Emergencies (ESMOE) airway module training, which all interns should receive, a high rate of success was not achieved in this study. Simulation-based training and assessment may be a valuable tool to improve intern training and preparedness.

Emergency scalpel cricothyroidotomy use in a prehospital trauma service: a 20-year review

BackgroundThis study aimed to determine the rate of scalpel cricothyroidotomy conducted by a physician–paramedic prehospital trauma service over 20 years and to identify indications for, and factors associated with the...

Prevalence of calcified epiglottis in postmortem computed tomography. Is there a correlation to failed endotracheal intubation?

Calcification of the epiglottis is a normal physiological degenerative process, although it can also be a consequence of infection or trauma. There are three possible forensically relevant consequences from epiglottic calcification: misinterpretation as foreign bodies, dysphagia as a major contributing factor to aspiration, and association with difficult intubation or a misplaced ventilation tube. It is the aim of this study (I) to inquire about the prevalence of epiglottic calcification in postmortem CT in general and (II) to investigate whether calcification of the epiglottis is linked to a higher incidence of failed endotracheal intubation. We retrospectively analysed 2930 consecutive cases in postmortem CT at the Institute of Forensic Medicine. The prevalence of epiglottic calcification was 4.1%. Higher age and male sex are associated with an increased risk of epiglottic calcification. There was no calcification of the epiglottis in the cases with misplacement of the ventilation tube in the esophagus. To verify the result of our study, that is, the calcification of the epiglottis is not linked to a higher incidence of failed endotracheal intubation, it might be reasonable to repeat this study with a more representative study population. The high interindividual variations of calcified epiglottis could be used for identification.

Modified Infant Feeding Tube as an Indigenous Endotracheal Tube in Unanticipated Congenital Subglottic Stenosis

Introduction: In neonates with an unanticipated difficult airway, there is an increased probability of failed intubation even with highly trained hands while performing direct laryngoscopy. Aims: We describe our experience of using a modified infant feeding tube (IFT) as an indigenous endotracheal tube (ETT) in a series of paediatric surgical patients with congenital subglottic stenosis (SGS). Material and Methods: A retrospective study was performed in our institute from January 2018 to December 2019. ETT with modified 6 and 8 French (Fr) sized IFT’s were used. A stylet obtained from the VP shunt system was used to aid in intubation. Results: Out of 12,500 admissions in our department, there were 5 pediatric cases with SGS which were managed using modified IFT. Four were neonates and 1 infant (M:F = 2:3). Modified IFT(s) were used after failed intubation with ETT of size 2.5 mm in 4 patients (non-availability of ETT of size 2 mm), while in one neonate, even 2 mm ETT could not be negotiated due to SGS. In all the 5 children, successful intubation was finally performed with modified 8 French (Fr) IFT in 3, and with modified 6 Fr IFT in two cases. The surgical procedure was completed in 4 neonates out of 5 cases, while in one infant it was deferred due to the clinical condition of the patient and significant SGS. Conclusion: All 5 patients with SGS were managed without performing a tracheostomy. Modified IFT(s) is an effective alternative if smaller sized ETT(s) cannot be negotiated or unavailable in difficult neonatal and paediatric airway. This modified IFT as ETT has to be an important part of the emergency airway tray. It should not be considered as a replacement for routine use of standard ETT.

English

BACKGROUND First-pass success is the successful intubation on the first attempt. It is the desired goal of emergency intubation and failure to achieve it may increase the risk of adverse effects. With failure of first pass intubation, life-threatening complications occur, commonly in critically ill patients. The aim of this study is to determine the association between the success of first-pass intubation and frequency of adverse events during endotracheal intubation. METHODS A cross sectional analytical study was done in a tertiary care hospital between October 2016 and October 2017. 100 failed first-pass intubation cases and 100 successful first-pass intubation cases were evaluated for factors associated with failed first-pass intubation and frequency of adverse events following intubation. RESULTS The groups were matched with respect to gender, induction agent use, fentanyl use and type of laryngoscope used. Mean age in failed first-pass intubation group was 5.61 years higher than subjects in successful first-pass intubation group (P = 0.016). Proportion of subjects with difficult airway was 19 % in failed first-pass intubation group and 3 % in successful first-pass intubation (P < 0.001). Failed first-pass intubation cases had higher frequency of adverse events like oesophageal intubation (9 % vs. 0 %), aspiration (7 % vs. 1 %), cuff leakage (2 % vs. 0 %) and hypotension (7 % vs. 1 %) compared to successful first-pass intubation cases. CONCLUSIONS The frequency of adverse events was high in failed first-pass intubation. Older age and presence of difficult airway were factors significantly associated with failed first-pass intubation. KEYWORDS First Pass Intubation, First-Pass Success, Adverse Events, Emergency Department, Failed First Attempt, Endotracheal Intubation

Current airway management practices after a failed intubation attempt in Australian and New Zealand emergency departments.

The aims of the present study were to describe current airway management practices after a failed intubation attempt in Australian and New Zealand EDs and to explore factors associated with second attempt success. Data were collected from a multicentre airway registry (The Australian and New Zealand Emergency Department Airway Registry). All intubation episodes that required a second attempt between March 2010 and November 2015 were analysed. Analysis for association with success at the second attempt was undertaken for patient factors including predicted difficulty of laryngoscopy, as well as for changes in laryngoscope type, adjunct devices, intubator and intubating manoeuvres. Of the 762 patients with a failed first intubation attempt, 603 (79.1%) were intubated successfully at the second attempt. The majority of second attempts were undertaken by emergency consultants (36.8%) and emergency registrars (34.2%). A change in intubator occurred in 56.5% of intubation episodes and was associated with higher second attempt success (unadjusted odds ratio [OR] 1.85; 95% confidence interval [CI] 1.29-2.65). In 69.7% of second attempts at intubation, there was no change in laryngoscope type. Changes in laryngoscope type, adjunct devices and intubation manoeuvres were not significantly associated with success at the second attempt. In adjusted analyses, second attempt success was higher for a change from a non-consultant intubator to a consultant intubator from any specialty (adjusted OR 2.31; 95% CI 1.35-3.95) and where laryngoscopy was not predicted to be difficult (adjusted OR 2.58; 95% CI 1.58-4.21). The majority of second intubation attempts were undertaken by emergency consultants and registrars. A change from a non-consultant intubator to a consultant intubator of any specialty for the second attempt and intubation episodes where laryngoscopy was predicted to be non-difficult were associated with a higher success rate at intubation. Participation in routine collection and monitoring of airway management practices via a Registry may enable the introduction of appropriate improvements in airway procedures and reduce complication rates.

Three-day tracheal intubation manikin training for novice doctors using Macintosh laryngoscope, McGRATH MAC videolaryngoscope and Pentax AirwayScope.

Background:We compared the intubation skills obtained by novice doctors following training using 3 instruments, the conventional Macintosh laryngoscope (Mac) and 2 types of indirect video-laryngoscopes (McGrathTM-MAC: McGrath (McG) and AirwayScope (AWS)), to determine the most appropriate instrument for novice doctors to acquire intubation skills, especially focusing on visual confirmation of vocal cords, during a 3-day intensive manikin training program.Methods:Fifteen novice doctors who did not have sufficient experience in endotracheal intubation (ETI) and consented to participate in this study were included. We used AirSim and AMT (Airway management Trainer) manikins. First, an experienced anesthesiologist instructed the trainees on using the 3 instruments for a few minutes. Then, after familiarizing themselves with each device for 10 minutes, the participants attempted ETI on the 2 manikins with the 3 devices used in random order. Intubations with each device were practiced and performed for 3 successive days. We assessed the percentage of glottic opening (POGO) score, successful intubation rate and tracheal intubation time for each participant, with each device, and on each day.Results:In the first manikin, AirSim, POGO scores in the McG and AWS groups were significantly higher than those in the Mac group on all 3 days (P < .0001). The number of intubation failures in the Mac group decreased from 2 cases on day 1, to 1 case on day 2 and zero cases on day 3. There were no failures in the McG and AWS groups on any of the days. With the second manikin, AMT, POGO scores in the Mac group were significantly lower than those in the McG and AWS groups on all 3 days. There were no intubation failures in the AWS group on all 3 days. In the Mac group, the number of intubation failures decreased from 3 on day 1, to 2 on day 2 and zero failures on day 3. In the McG group, there were only 3 failures on day 1.Conclusion:The 2 types of indirect video-laryngoscopes (McGRATH and AirwayScope) were demonstrated to be suitable instruments for novice doctors to achieve higher POGO scores in a 3-day intensive ETI training.

Extraglottic Airway Device Misplacement: A Novel Classification System and Findings in Postmortem Computed Tomography

Extraglottic airway devices are frequently used during cardiac arrest resuscitations and for failed intubation attempts. Recent literature suggests that many extraglottic airway devices are misplaced. The aim of this study is to create a classification system for extraglottic airway device misplacement and describe its frequency in a cohort of decedents who died with an extraglottic airway device in situ. We assembled a cohort of all decedents who died with an extraglottic airway device in situ and underwent postmortem computed tomographic (CT) imaging at the state medical examiner's office during a 6-year period, using retrospective data. An expert panel developed a novel extraglottic airway device misplacement classification system. We then applied the schema in reviewing postmortem CT for extraglottic airway device position and potential complications. We identified 341 eligible decedents. The median age was 47.0 years (interquartile range 32 to 59 years). Out-of-hospital personnel placed extraglottic airway devices in 265 patients (77.7%) who subsequently died out of hospital; the remainder died inhospital. The classification system consisted of 6 components: depth, size, rotation, device kinking, mechanical blockage of ventilation opening, and injury. Under the system, extraglottic airway devices were found to be misplaced in 49 cases (14.4%), including 5 (1.5%) that resulted in severe injuries. We created a novel extraglottic airway device misplacement classification system. Misplacement occurred in greater than 14% of cases. Severe traumatic complications occurred rarely. Quality improvement activities should include review of extraglottic airway device placement when CT images are available and use the classification system to describe misplacements.