laryngospasm scenario

Although third-level studies may prove very difficult or subject to bias, first- and second-level studies are feasible but have yet to be performed for laryngospasm and pediatric airway training. Any stimulation in the area supplied by the superior laryngeal nerve, during a light plane of anesthesia, may produce laryngospasm. Example Plan for a neonate! Perianesthetic Management of Hypertrophic Cardiomyopathy, Copyright 2023 American Society of Anesthesiologists. This paper discusses a case study where the patient had laryngospasm, it also looks at the pathophysiology, risk factors and management of . If you have recurring laryngospasms, schedule an appointment with a healthcare provider who specializes in laryngology (a subspecialty within the ear, nose and throat [ENT] department). OVERVIEW Laryngospasm is potentially life-threatening closure of the true vocal chords resulting in partial or complete airway obstruction unresponsive to airway positioning maneuvers. Even though laryngospasm isnt usually serious or life-threatening, the experience can be terrifying. They can help figure out whats causing them. Paediatr Anaesth 2004; 14:21824, Alalami AA, Ayoub CM, Baraka AS: Laryngospasm: Review of different prevention and treatment modalities. The vocal cords are two fibrous bands inside the voice box (larynx) at the top of the windpipe (trachea). Some people may experience recurring (returning) laryngospasms. In this case, some equipment has high usage demands and becomes scarce throughout the unit. Laryngospasm is an emergency situation and must be promptly recognized. TeamSTEPPS 2.0 Specialty Scenarios - 85 Specialty Scenarios OR Scenario 68 Appropriate for: All Specialties . Mayo Clinic does not endorse companies or products. border: none; "Mayo," "Mayo Clinic," "MayoClinic.org," "Mayo Clinic Healthy Living," and the triple-shield Mayo Clinic logo are trademarks of Mayo Foundation for Medical Education and Research. Training . Airway simulators and high fidelity mannequins are important teaching tools.73Simple bench models, airway mannequins, and virtual reality simulators can be used to learn and practice basic and complex technical skills. In the study by von Ungern-Sternberg et al. To provide you with the most relevant and helpful information, and understand which This site uses Akismet to reduce spam. Khanna S (expert opinion). Classification and Types of Submersion Injuries and Drowning Scenarios. Laryngospasm is a sudden spasm of the vocal cords. } For example, you might be able to exhale and cough, but have difficulty breathing in. Laryngospasm can sometimes occur after an endotracheal tube is removed from the throat. Because laryngospasm is a potential life-threatening postoperative event, the PACU nurse Propofol depresses laryngeal reflexes33,48and is therefore widely used to treat laryngospasm in children.3,49A study has assessed the effectiveness of a small bolus dose of propofol (0.8 mg/kg) for treatment of laryngospasm when 100% O2with gentle positive pressure had failed.49In this study, propofol was administered if laryngospasm occurred after LMA removal and if it persisted with a decrease in SpO2to 85% despite 100% O2with gentle positive pressure ventilation.49The injection of propofol was able to relieve spasm in 76.9% of patients, whereas the remaining patients required administration of succinylcholine and tracheal intubation.49The success rate of propofol observed in this study is superior to the chest compression technique mentioned previously. Call for help early. The final decision depends on the severity of the laryngospasm (i.e. He had been fasting for the past 6 h. Preoperative evaluation was normal (systemic blood pressure 85/50 mmHg, heart rate 115 beats/min, pulse oximetry [SpO2] 99% on room air). If complete laryngospasm cannot be rapidly relieved, IV agents should be quickly considered. ANESTHESIOLOGY 1981; 55:599602, Walker RW, Sutton RS: Which port in a storm? When it happens, the vocal cords suddenly seize up or close when taking in a breath, blocking the flow of air into the lungs.People with this . Here are a couple of techniques to try during an attack: Because laryngospasm happens suddenly without warning, theres really no way to prevent it. #mc-embedded-subscribe-form .mc_fieldset { Paroxysmal Laryngospasm: A Rare Condition That Respiratory Physicians Must Distinguish from Other Diseases with a Chief Complaint of Dyspnea. The first step of laryngospasm management is prevention. A detailed history should be taken to identify the risk factors. There is a problem with These are the reasons why inhalational induction conducted by nonspecialized anesthetists remains associated with an increased risk of laryngospasm.2,5,18In children with hyperactive airways, there are now several arguments in favor of IV induction with propofol versus inhalational induction. In a more recent series, the overall incidence of laryngospasm was lower8but the predominance of such incidents at a young age was still clear: 50 to 68% of cases occurred in children younger than 5 yr. Manipulation of the airway at an insufficient depth of anesthesia is a major cause of laryngospasm. J Anesth 2010; 24:8547, Schroeck H, Fecho K, Abode K, Bailey A: Vocal cord function and bispectral index in pediatric bronchoscopy patients emerging from propofol anesthesia. A single copy of these materials may be reprinted for noncommercial personal use only. Description. Thus, the potential window for safe administration of general anesthesia is frequently very short. It is still debated whether tracheal extubation should be performed in awake or deeply anesthetized children to decrease laryngospasm. More needed than oxygen! If you think youve experienced laryngospasm, talk to your healthcare provider. Can J Anaesth 1988; 35:938, Fink BR: The etiology and treatment of laryngeal spasm. The vocal cords are two fibrous bands inside the voice box (larynx) at the top of the windpipe (trachea). At 11:23 PM, an inspiratory stridulous noise was noted again. Laryngospasm may not be obvious it may present as increased work of breathing (e.g. This situation creates a risk of bronchopulmonary infection, chronic cough, and bronchospasm. URI = upper respiratory tract infection. Accessed Nov. 5, 2021. Definition. Laryngospasm is the sustained closure of the vocal cords resulting in the partial or complete loss of the patient's airway. Description The patient requires intubation, but isn't actively crashing. They can perform an examination and find out if there are ways to prevent laryngospasm from happening in the future. Anesth Analg 1991; 73:26670, Rachel Homer J, Elwood T, Peterson D, Rampersad S: Risk factors for adverse events in children with colds emerging from anesthesia: A logistic regression. He is a co-founder of theAustralia and New Zealand Clinician Educator Network(ANZCEN) and is the Lead for theANZCEN Clinician Educator Incubatorprogramme. There is controversy in the literature regarding the use of inhalational or IV induction agents and associated risk of laryngospasm. Fig. 1. Policy. ANESTHESIOLOGY 1997; 87:136872, Mazurek AJ, Rae B, Hann S, Kim JI, Castro B, Cot CJ: Rocuronium, Cheng CA, Aun CS, Gin T: Comparison of rocuronium and suxamethonium for rapid tracheal intubation in children. Last reviewed by a Cleveland Clinic medical professional on 02/11/2022. Sci Transl Med 2010; 2:19cm8. ANESTHESIOLOGY 2010; 12:98592, McGaghie WC: Medical education research as translational science. Sign up for free, and stay up to date on research advancements, health tips and current health topics, like COVID-19, plus expertise on managing health. Paediatr Anaesth 2008; 18:297302, Cohen MM, Cameron CB: Should you cancel the operation when a child has an upper respiratory tract infection? For instance, coughing can be voluntarily inhibited. ANESTHESIOLOGY 2010; 113:2007, Roy WL, Lerman J: Laryngospasm in paediatric anaesthesia. Target Audience: c. Treatment of laryngospasm is aimed at supporting ventilation. Nov. 7, 2021. Paediatr Anaesth 2008; 18:2818, Hampson-Evans D, Morgan P, Farrar M: Pediatric laryngospasm. None of the children in the chest compression group developed gastric distension (86.5% in the standard group). In the study by von Ungern-Sternberg et al. The goal is to slow your breathing and allow your vocal cords to relax. There is a need to fill this knowledge gap and to answer questions about what types of clinical education and what type of management algorithm result in better outcome. ANESTHESIOLOGY 2006; 105:4550, Meier S, Geiduschek J, Paganoni R, Fuehrmeyer F, Reber A: The effect of chin lift, jaw thrust, and continuous positive airway pressure on the size of the glottic opening and on stridor score in anesthetized, spontaneously breathing children. Dry drowning has been explained by mechanisms such as protracted laryngospasm and vagally mediated cardiac arrest triggered by contact of liquid with the upper airways. Paediatr Anaesth 2007; 17:15461, Guglielminotti J, Constant I, Murat I: Evaluation of routine tracheal extubation in children: Inflating or suctioning technique? Two min after loss of eyelash reflex, a first episode of airway obstruction with inspiratory stridor and suprasternal retraction was successfully managed by jaw thrust and manual positive pressure ventilation. 1998-2023 Mayo Foundation for Medical Education and Research (MFMER). If breathing exercises and pushing on your laryngospasm notch dont relieve your symptoms, call 911 or head to the nearest emergency room. If we combine this information with your protected Am J Respir Crit Care Med 1998; 157:81521, von Ungern-Sternberg BS, Boda K, Schwab C, Sims C, Johnson C, Habre W: Laryngeal mask airway is associated with an increased incidence of adverse respiratory events in children with recent upper respiratory tract infections. acute dystonic reactions; rarely associated with ketamine procedural sedation. If the cause is unclear, your doctor may refer you to an ear, nose and throat specialist (otolaryngologist) to look at your vocal cords with a mirror or small fiberscope to be sure there is no other abnormality. There are data supporting the efficacy of structured courses that integrate airway trainers and high fidelity simulation for airway management training.7677Recent evidence also supports the transfer of technical and nontechnical skills acquired during simulation to the clinical setting.78We therefore strongly encourage the integration of simulation-based training for pediatric airway management, including for the management of laryngospasm. Laryngospasm, particularly during inhalational induction and after extubation, is an important cause of apnea that all anesthesiologists who care for pediatric patients should understand and anticipate. However, some authors have observed that emergence from anesthesia tends to become the most critical period, possibly in relation to changes in practice including the use of laryngeal mask airway (LMA) and/or of propofol and newer inhalational agents.8, Laryngospasm can result in life-threatening complications, including severe hypoxia, bradycardia, negative pressure pulmonary edema, and cardiac arrest. Management of refractory laryngospasm. 21,22. . These cookies track visitors across websites and collect information to provide customized ads. This category only includes cookies that ensures basic functionalities and security features of the website. Case Scenario: Perianesthetic Management of Laryngospasm in Children Case Scenario: Perianesthetic Management of Laryngospasm in Children Case Scenario: Perianesthetic Management of Laryngospasm in Children Case Scenario: Perianesthetic Management of Laryngospasm in Children Anesthesiology. As your vocal cords slowly relax and open, you may hear a high-pitched sound (stridor). This situation has been found to occur in approximately 50% of patients.8The most commonly used muscle relaxant is succinylcholine, but other agents have also been used, including rocuronium and mivacurium.8However, succinylcholine remains the gold standard.4Some authors have suggested the use of a small dose of succinylcholine (0.1 mg/kg) but there is a lack of dose-response study because the study included only three patients.52Therefore, we recommend using IV doses of succinylcholine no less than 0.5 mg/kg. Von Ungern-Sternberg et al. But if you have laryngospasms often, you should schedule an appointment with your healthcare provider. ,5emergent procedures had a moderately higher risk than elective procedures for perioperative respiratory adverse events, including laryngospasm (17%vs. Am J Med 2001; 111(Suppl 8A):69S77S, Shannon R, Baekey DM, Morris KF, Lindsey BG: Brainstem respiratory networks and cough. Both conditions result in sudden, frightening spasms and both conditions can temporarily affect your ability to breathe and speak. In children with URI, the use of an endotracheal tube (ETT) may increase by 11-fold the risk of respiratory adverse events, in comparison with a facemask.11Less invasive airway management could be beneficial in children with airway hyperactivity. However, onset time to effective relief of laryngospasm is shorter than onset time to maximal twitch depression, enabling laryngospasm relief and oxygenation (within 60 s) in less time than time to maximum twitch depression.55Therefore, intramuscular succinylcholine is the best alternative approach if IV access is not readily available.56Another alternative for succinylcholine administration is the intraosseous route. ANESTHESIOLOGY 2001; 95:299306, Lakshmipathy N, Bokesch PM, Cowen DE, Lisman SR, Schmid CH: Environmental tobacco smoke: A risk factor for pediatric laryngospasm. It is bounded anteriorly by the ascending ramus of the mandible adjacent to the condyle, posteriorly by the mastoid process of the temporal bone, and cephalad by the base of the skull.. Anesth Analg 2007; 104:26570, Bordet F, Allaouchiche B, Lansiaux S, Combet S, Pouyau A, Taylor P, Bonnard C, Chassard D: Risk factors for airway complications during general anaesthesia in paediatric patients. Whether or not this is relevant to perioperative risk of laryngospasm has been questioned many times in the literature.9,11Von Ungern-Sternberg et al. So when in doubt, meticulous observation with aggressive preparation may be reasonable. In case of sale of your personal information, you may opt out by using the link. A competence-based training that includes a structured curriculum and regular workplace-based assessment may help mitigate the effects of caseload reduction. On the other hand, attempts to provide positive-pressure ventilation with a facemask may distend the stomach, increasing the risk of gastric regurgitation. People with laryngospasm are unable to speak or breathe. He is an internationally recognised Clinician Educator with a passion for helping clinicians learn and for improving the clinical performance of individuals and collectives. You may opt-out of email communications at any time by clicking on In addition, a video of a simulated layngospasm scenario is available (See video, Supplemental Digital Content 1, http://links.lww.com/ALN/A807, which demonstrates the management of a simulated laryngospasm in a 10-month-old boy). Minimally invasive anti-reflux procedures, Advertising and sponsorship opportunities. Avoid breathing in through your nose. A simulation scenario is an artificial representation of a real-world event to achieve educational goals through experiential learning. Elsevier; 2021. https://www.clinicalkey.com. Anesthesia was induced by a resident under the direct supervision of a senior anesthesiologist with inhaled sevoflurane in a 50/50% (5 l/min) mixture of oxygen and nitrous oxide. , otolaryngology surgery).2,5,,7Many factors may increase the risk of laryngospasm. Adults may be less prone to development of laryngospasm. Journal of Voice. Complete airway obstruction is characterized by: Where is the laryngospasm notch? 2). Chris is an Intensivist and ECMO specialist at theAlfred ICU in Melbourne. He coordinates the Alfred ICUs education and simulation programmes and runs the units educationwebsite,INTENSIVE. 5 of 7 This document is not intended to provide a comprehensiv e discussion of each drug. , the overall incidence of respiratory adverse events seems to be higher in children who were awake when their LMA was removed and lower in those who were awake when their endotracheal tube was removed.5In summary, evidence seems to favor deep LMA and awake ETT removal. In: Anesthesia Secrets. GERD: Can certain medications make it worse? Like any other crisis, such management requires the application of appropriate knowledge, technical skills, and teamwork skills (or nontechnical skills). Afferent nerves converge in the brainstem nucleus tractus solitarius. margin-top: 20px; But it can be a symptom of other conditions, including: Left untreated, laryngospasm caused by anesthesia can be fatal. Table 1. Anesth Analg 1978; 57:5067, Schebesta K, Gloglu E, Chiari A, Mayer N, Kimberger O: Topical lidocaine reduces the risk of perioperative airway complications in children with upper respiratory tract infections. Mayo Clinic is a nonprofit organization and proceeds from Web advertising help support our mission. Some advocate delivery of jaw thrust and CPAP as the first airway opening maneuvers to improve breathing patterns in children with airway obstruction.42For others, both chin lift and jaw thrust maneuvers combined with CPAP improve the view of the glottic opening and decrease stridor in anesthetized, spontaneously breathing children.41It is likely that if the jaw thrust maneuver is properly applied, i.e. Evidence on this subject is scarce, but the study by von Ungern-Sternberg et al. The afferent nerve involved in laryngeal closure reflex is the superior laryngeal nerve. Anaesthesia 1993; 48:22930, Seah TG, Chin NM: Severe laryngospasm without intravenous accessa case report and literature review of the non-intravenous routes of administration of suxamethonium. Postoperative negative pressure pulmonary edema typically occurs in response to an upper airway obstruction, where patients can generate high negative intrathoracic pressures, leading to a postrelease pulmonary edema. The brainstem nucleus tractus solitarius is not only an afferent portal, but has interneurons that play an essential role in the genesis of upper airway reflexes.19Little is known about the centers that regulate and program these reflexes. The patient is unconscious and initially breathing easily with an oral airway in place. As they correctly point out, laryngospasm is a serious complication and must be promptly managed to avoid serious physiological disturbance. Elsevier; 2022. https://www.clinicalkey.com. Preference cookies are used to store user preferences to provide content that is customized and convenient for the users, like the language of the website or the location of the visitor. Otolaryngol Head Neck Surg 1998; 118:8802, Gulhas N, Durmus M, Demirbilek S, Togal T, Ozturk E, Ersoy MO: The use of magnesium to prevent laryngospasm after tonsillectomy and adenoidectomy: A preliminary study. He is one of the founders of theFOAMmovement (Free Open-Access Medical education) and is co-creator oflitfl.com,theRAGE podcast, theResuscitologycourse, and theSMACCconference. Cleveland Clinic is a non-profit academic medical center. This function involves several upper airway reflexes: the laryngeal closure reflex, which consists of vocal fold adduction; apnea; swallowing; and coughing.19To efficiently protect the airway, laryngeal closure reflex must be coordinated with swallowing. #mergeRow-gdpr { The question of whether using propofol or muscle relaxant first is a matter of timing. Although the efficacy of subhypnotic doses of propofol has been suggested in children, there is a possibility that these doses are inadequate in infants, especially in those younger than 1 yr. Can J Anaesth 2010; 57:74550, Sanikop C, Bhat S: Efficacy of intravenous lidocaine in prevention of post extubation laryngospasm in children undergoing cleft palate surgeries. Understanding the mechanics of laryngospasm is crucial for proper treatment. Most of the time, your healthcare provider can diagnose laryngospasm by reviewing your symptoms and medical history. The efficacy of lidocaine to either prevent or control extubation laryngospasm has been studied since the late 1970s.62Some articles have confirmed the efficacy of lidocaine for preventing postextubation laryngospasm, whereas others have found the opposite results to be true.16,63,,65A recent, well-conducted, randomized placebo-controlled trial in children undergoing cleft palate surgery demonstrated the effectiveness of IV lidocaine (1.5 mg/kg administered 2 min after tracheal extubation) in reducing laryngospasm and coughing (by 29.9% and 18.92%, respectively).64However, these favorable results were not confirmed in other studies.5,65The role of lidocaine (IV or topical) in preventing laryngospasm is still controversial. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. But opting out of some of these cookies may have an effect on your browsing experience. font-weight: normal; Upper airway disorders. . (#2) With steroid and antibiotic, most patients will gradually improve. Identifying patients at increased risk for laryngospasm and taking recommended precautions are the most important measures to prevent laryngospasm (fig. Laryngospasm can happen suddenly and without warning, lasting up to one minute. PEEP! After finishing his medical degree at the University of Auckland, he continued post-graduate training in New Zealand as well as Australias Northern Territory, Perth and Melbourne. However, waiting until hypoxia opens the airway is not recommended, because a postobstruction pulmonary edema or even cardiac arrest may occur.43. These risk factors can be patient-, procedure-, and anesthesia-related (table 1). This content does not have an English version. We also use third-party cookies that help us analyze and understand how you use this website. From: Encyclopedia of . He is retaining oxygen saturations > 94 percent. 2012 Feb;116(2):458-71. doi: 10.1097/ALN.0b013e318242aae9. 2012 Aug;117(2):441-2. doi: 10.1097/ALN.0b013e31825f02b4. As a result, your airway becomes temporarily blocked, making it difficult to breathe or speak. Effective management of laryngospasm in children requires appropriate diagnosis,4followed by prompt and aggressive management.8Many authors recommend applying airway manipulation first, beginning with removal of the irritant stimulus38and then administering pharmacologic agents if necessary.8. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. It may be difficult for a nonspecialist pediatric anesthesiologist to adequately manage an inhalational induction, because of the possibility to fail to manage the airway properly or the inability to recognize and treat early a stridor/laryngospasm. A recent retrospective study has assessed the incidence of laryngospasm in a large population and characterized the interventions used to treat these episodes.8The results have shown that treatment followed a basic algorithm including CPAP, deepening of anesthesia, muscle relaxation, and tracheal intubation. Pulmonary complications. His one great achievement is being the father of three amazing children. Pediatr Pulmonol 2010; 45:4949, Afshan G, Chohan U, Qamar-Ul-Hoda M, Kamal RS: Is there a role of a small dose of propofol in the treatment of laryngeal spasm? Common presenting signs and symptoms include tachypnea, tachycardia, diaphoresis, trembling, palpitations, shortness of breath and chest pain. 3, 5, 7 In both partial and complete laryngospasm, signs of varying degrees of airway obstruction, such as suprasternal retraction, supraclavicular retractions, tracheal tug, Laryngospasm is a frightening condition that happens when your vocal cords suddenly seize up, making breathing more difficult. Second-level studies attempt to document the transfer of skills to the clinical setting and patient care. Rev Bras Anestesiol. Refer to each drug's package Paediatr Anaesth 2008; 18:28996, Oberer C, von Ungern-Sternberg BS, Frei FJ, Erb TO: Respiratory reflex responses of the larynx differ between sevoflurane and propofol in pediatric patients. The apneic reflex varies as a function of age. Taking an antacid or acid inhibitor for a few weeks may help diagnose the problem by the process of elimination. However, a systematic approach based on the model of translational research has recently been proposed in medical education.79In this model, successive rigorous studies are conducted to evaluate the acquisition of skills and knowledge at different outcome levels. No chest wall movement with no breath sounds on auscultation, Inability to manually ventilate with bag-mask ventilation, ischemic end organ injury (e.g. Attempt airway maneuvers such as jaw thrust and nasal airway. It is mandatory to procure user consent prior to running these cookies on your website. Br J Anaesth 1998; 81:6925, Krodel DJ, Bittner EA, Abdulnour R, Brown R, Eikermann M: Case scenario: Acute postoperative negative pressure pulmonary edema. Relative Risk (95% CI) of Laryngospasm in Children According to the Presence of Cold Symptoms, Household exposure to tobacco smoke was shown to increase the incidence of laryngospasm from 0.9% to 9.4% in children scheduled for otolaryngology and urologic surgery.12This strong association between passive exposure to tobacco smoke and airway complications in children was also observed in another large study.13. Based on a work athttps://litfl.com. If you have any of the conditions listed above, talk to your healthcare provider about ways to reduce your risk for laryngospasms. Qual Saf Health Care 2005; 14:e3, Fernandez E, Williams DG: Training and the European Working Time Directive: A 7 year review of paediatric anaesthetic trainee caseload data. Place a straw in your mouth and seal your lips around it. Designing an effective simulation scenario requires careful planning and can be broken into several steps. Indian J Anaesth 2010; 54:1326, Behzadi M, Hajimohamadi F, Alagha AE, Abouzari M, Rashidi A: Endotracheal tube cuff lidocaine is not superior to intravenous lidocaine in short pediatric surgeries. It is most commonly occurring on induction or emergence phases and can have serious life threatening consequences. Symptoms can be mild or severe. Pulm Pharmacol Ther 2004; 17:37781, Suskind DL, Thompson DM, Gulati M, Huddleston P, Liu DC, Baroody FM: Improved infant swallowing after gastroesophageal reflux disease treatment: A function of improved laryngeal sensation? 9500 Euclid Avenue, Cleveland, Ohio 44195 |, Important Updates + Notice of Vendor Data Event. The mother volunteered that he was exposed to passive smoking in the home. }, #FOAMed Medical Education Resources byLITFLis licensed under aCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. retained throat pack). Hold your breath for five seconds, then repeat until the laryngospasm stops. Experimental evidences and anecdotal reports indicate that intraosseous and IV injection behave similarly, resulting in adequate intubating conditions within 45 s (1 mg/kg).57In children in whom succinylcholine is contraindicated, rocuronium administered at a dose of two to three times the ED95(0.9 to 1.2 mg/kg) may represent a reasonable substitute when rapid onset is needed.58,,60In addition, there is a possibility to quickly reverse the neuromuscular blockade induced by rocuronium using sugammadex if necessary.61. We do not endorse non-Cleveland Clinic products or services. 2. Qual Saf Health Care. These risk factors can be Anesthesiology 2012; 116:458471 doi: https://doi.org/10.1097/ALN.0b013e318242aae9. | INTENSIVE | RAGE | Resuscitology | SMACC. To avoid significant morbidity and mortality, the use of a structured algorithm has been proposed.8,70One study suggests that if correctly applied, a combined core algorithm recommended for the diagnosis and management of laryngospasm would have led to earlier recognition and/or better management in 16% of the cases.70These results should encourage physicians to implement their own structured algorithm for the diagnosis and management of laryngospasm in children in their institutions.

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laryngospasm scenario

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