Laser division of the aryepiglottic folds for severe laryngomalacia

Efficacy and predictors of success on laryngomalacia surgery: experience from a tertiary pediatric care center in Brazil

OBJECTIVES

Laryngomalacia is the most common congenital cause of stridor; the natural history of the disease runs through to complete resolution by the age of two. Severe cases are characterized by cyanosis, hypoxia, apnea, furcular and/or subcostal retractions, aspirations, pulmonary hypertension, and failure to thrive and must undergo surgery. This study aimed to evaluate the success rates of supraglottoplasty in our hospital and evaluate the predictive factors for surgical success.

METHODS

Cohort study, prospectively planned. 75 patients undergoing endoscopic surgery from July 2007 to July 2016 were analyzed at the Santo Antônio Children's Hospital. The primary outcome was percentage of surgical success, defined as the absence of respiratory symptoms or presence of a mild stridor without retractions on the first post-operative month (late success). The secondary outcomes were the early surgical success (absence of respiratory symptoms or presence of a mild stridor without retractions on the first post-operative day).

RESULTS

39 (58.2%) were male, with an average of 4.9 months. Surgical success on the first day was 80.6% (n=54). At the end of the 1st month, surgical success was 88.6%, considering only those who completed assessment. Twenty-one (34%) presented comorbidities. Presence of comorbidities, pharyngomalacia and GERD were associated with a worse result on the 1st postoperative day, whereas, at the end of the first month, presence of comorbidities, concomitant injuries (tracheo and bronchomalacia) and pharyngomalacia were the predictive variables of surgery failure.

CONCLUSION

Supraglottoplasty has high rates of efficacy and low morbidity. The presence of comorbidities and pharyngomalacia has shown association with a worse early and late surgical outcome. Synchronous airway lesions predict a worse surgical result at the end of the first month. GERD was associated with obstructive symptomatology only in the 1st post-operative day.

LEVEL OF EVIDENCE

Level 3 of evidence, according to the "The Oxford 2011 Levels of Evidence" from Oxford Centre for Evidence-Based Medicine.

Stridor in the Infant Patient

Stridor is a high-pitched extrathoracic noise associated with turbulent airflow, commonly associated with respiratory distress in infants. Workup for stridor requires evaluation of the upper-respiratory airway, with severe distress requiring evaluation under anesthesia. The differential diagnosis of stridor depends on location of the obstruction, age of the patient, and acuity of the symptoms. The most common reason is laryngomalacia; most patients can be managed conservatively with resolution of symptoms by 2 years of age. In children who do not improve or have severe disease, supraglottoplasty is the treatment of choice, and the majority will have resolution of stridor postoperatively.

One and half coblation supraglottoplasty: A novel technique for management of type II laryngomalacia

OBJECTIVES

Endoscopic supraglottoplasty is the mainstay surgical procedure in treatment of laryngomalacia. Various instruments have been used with coblation recently gaining widespread attention. Regarding the technique used, cutting the aryepiglottic folds is associated with rapid improvement but carries risk of restenosis while outer scar contracture method has delayed but established result. Therefore, this study was conducted to introduce a modified coblation supraglottoplasty technique gathering both benefits and evaluate its results and effectiveness.

METHODS

Retrospective study included patients diagnosed with type II laryngomalacia was conducted. Supraglottoplasty was done by "one and half coblation supraglottoplasty" technique which involves cutting of one aryepiglottic fold while the other one is laterally coagulated. Patients' basic and clinical data were assessed. Outcome measures included assessment of inspiratory stridor, failure to thrive, choking, cyanosis, lowest oxygen saturation levels and weight gain.

RESULTS

Seventeen patients were included in this study with a mean age of 3.71 ± 1.1 months. Significant statistical improvement was reached regarding stridor, failure to thrive and cyanosis. Also, minimal oxygen saturation and weight gain were significantly improved. None of the cases needed tracheostomy and no major postoperative complications occurred.

CONCLUSION

We conclude that "one and half coblation supraglottoplasty" is an effective and safe treatment for type II laryngomalacia with satisfactory outcomes.

LEVEL OF EVIDENCE

IV.

Surgical Intervention for Laryngomalacia: Age-Related Differences in Postoperative Sequelae

OBJECTIVE

Identify risk factors and determine perioperative morbidity of children undergoing surgery for laryngomalacia (LM).

METHODS

A retrospective analysis of the multi-institutional American College of Surgeons National Surgical Quality Improvement Program-Pediatric Database (ACS-NSQIP-P) was performed to abstract patients aged <18 years with LM (ICD-10 code Q31.5) who underwent laryngeal surgery (CPT code 31541) from 2015 to 2017. Analyzed clinical variables include patient demographics, hospital setting, length of stay, medical comorbidities, postoperative complications, readmission, and reoperation.

RESULTS

A total of 491 patients were identified, 283 were male (57.6%) and 208 were female (42.4%). The mean age at time of surgery was 1.07 years (range .01-17 years). Younger patients were more likely to undergo surgery in the inpatient setting compared to their counterparts (P < .001). Infants were more likely to have prolonged duration of days from admission to surgery (P < .001), days from surgery to discharge (P < .001), and total length of stay (P<.0010). Finally, there was no significant difference between age groups with respect to 30-day general surgical complications (P = .189), with an overall low incidence of reintubation (1.2%), readmission (3.1%), and reoperation (1.6%).

CONCLUSION

This analysis supports laryngeal surgery as a safe surgical procedure for LM. However, younger children are more likely to undergo operative intervention in the inpatient setting, endure delays from hospital admission to surgical intervention, and experience a prolonged length of stay due to their overall medical complexity. Recognition of key factors may assist in optimizing perioperative risk assessment and promote timely procedural planning in this unique pediatric patient subpopulation.

Coagulation of the lateral surface of aryepiglottic folds as an alternative to aryepiglottic fold release in management of type 2 laryngomalacia

OBJECTIVE

Endoscopic supraglottoplasty is the procedure of choice in treatment of laryngomalacia with CO2 laser and cold steel being the most common instruments used with excellent results. However, bleeding, supraglottic stenosis and aspiration may occur leading to serious complications. Using coblation in management of laryngomalacia was found to be beneficial. Therefore, we conducted this study to evaluate the outcome of supraglottoplasty done by coagulation using coblation of the lateral surface of aryepiglottic folds as an alternative technique to aryepiglottic fold release in management of type 2 laryngomalacia.

METHODS

Retrospective study was conducted at Mansoura University Hospitals; Egypt from November 2017 to March 2018 included patients diagnosed with severe type 2 laryngomalacia. Supraglottoplasty was done by using coblator applied to the lateral surface of aryepiglottic folds allowing for lateral scarring thus widening the airway, preventing supraglottic collapse and avoiding re-stenosis. Outcome measures included assessment of presence or absence of the following symptoms preoperatively and postoperatively: inspiratory stridor, failure to thrive, choking and cyanosis. Preoperative and postoperative lowest oxygen saturation levels, weight-by-age percentile, and need for tracheostomy were assessed.

RESULTS

Nine patients were included in this study with a mean age of 3.78 ± 1.20 months (range 2-6 months). Overall success rate was 89%. The most significantly improved symptom was stridor (p-value 0.008). Significant improvement in lowest oxygen saturation levels (from 89.11 ± 3.06% pre-operatively to 96.44 ± 3.50% post-operatively) and weight gain (from 4288.9 ± 643.1 gm. preoperatively to 5505.55 ± 1017.4 gm. 1 month postoperatively) was achieved. No detected re-stenosis on follow up and none of our cases needed tracheostomy.

CONCLUSION

Supraglottoplasty by coagulation of the lateral surface of aryepiglottic folds using coblation is an effective and safe technique and can improve airway symptoms and weight gain in patients with type 2 laryngomalacia.

Harmonic Shears in the Surgical Treatment of Laryngomalacia

Introduction Laryngomalacia (LM) is a condition that is clinically diagnosed in the pediatric period with inspiratory stridor and is caused by a congenital or acquired collapse of laryngeal suprastructures. Endoscopic supraglottoplasty is the modern gold standard surgical treatment for severe or complicated laryngomalacia. Various cold and powered surgical devices have been used to approach the aryepiglottic folds, and their advantages and drawbacks have been widely discussed. The applicability of Ultracision Harmonic shears (Ethicon Inc., NJ, US) for the sake of supraglottoplasty has not been previously advocated in the literature and is the subject of this study. Methods This was a review of the medical records of pediatric patients, with moderate to severe congenital laryngomalacia, who underwent supraglottoplasty with Harmonic at a single institution, from 2013 to 2019. Results A total of six patients underwent bilateral aryepiglottic fold division with the use of Ultracision in the study period (4 male, 2 female; mean age 7+/-9 months, age range 1m-24m). Postoperatively, all of the children were extubated and admitted to the pediatric intensive care unit (PICU) as a precaution measure. There were no early or late complications after the intervention. The postoperative endoscopic picture was evaluated in three patients (two of which for another reason). A stable laryngeal frame with no collapse or excessive scarring was observed. None of the patients required repeat surgery. Conclusion Based on the ease of surgical access, performance, surgical precision, and postoperative results, the use of Harmonic scissors appears to be a safe, practical, affordable, and easily applicable alternative for supraglottoplasty Type 2.

Treatment outcomes of supraglottoplasty for pediatric obstructive sleep apnea: A meta-analysis

OBJECTIVE

To comprehensively review changes in sleep parameters and the success rate of supraglottoplasty for treating obstructive sleep apnea (OSA) in children. In particular, to elucidate treatment modalities and factors affecting treatment outcomes in children with both laryngomalacia and OSA.

METHODS

The study protocol was registered on PROSPERO (CRD42015027053). Two authors independently searched databases including PubMed, MEDLINE, EMBASE, and the Cochrane Review database. The keywords were "supraglottoplasty," "laryngomalacia," "OSA," "polysomnography," "child," and "humans." Supraglottoplasty served as the primary treatment for OSA or secondary treatment for persistent disease after previous surgeries. Subgroup analyses were conducted for children receiving supraglottoplasty as the primary or secondary treatment for OSA, and for children with and without comorbidities.

RESULTS

Eleven studies with 121 patients were analyzed (mean age: 3.7 years; 64% boys; mean sample size: 11 patients). After surgery, the mean differences between the pre- and postoperative measurements were a significant reduction of 8.9 events/h in the apnea-hypopnea index (AHI) and an increase of 3.7% in minimum oxygen saturation (MinSaO2; P < 0.05). The overall success rate was 28% according to a postoperative AHI <1 and 72% according to an AHI <5. Children receiving supraglottoplasty as the primary treatment had significantly younger ages (0.6 vs 6.4 years P < 0.001) than those receiving supraglottoplasty as the secondary treatment, but the outcomes were similar (33% vs 19% for a postoperative AHI < 1, P = 0.27; 77% vs 61% for a postoperative AHI < 5, P = 0.233). Moreover, children with comorbidities, compared with those without, had a similar success rate according to a postoperative AHI <1 (25% vs 21%, P = 0.805) and postoperative AHI <5 (62% vs 84%, P = 0.166).

CONCLUSIONS

Supraglottoplasty is an effective surgery for AHI reduction and MinSaO2 increase in children with OSA and laryngomalacia. However, complete resolution of OSA is not achieved in most cases, and factors affecting treatment outcomes in these children require future studies.

Pharyngeal Wall Collapse and Multiple Synchronous Airway Lesions

Pharyngeal wall inspiratory collapse (PWIC) is a dynamic obstruction of the air column proximal to the glottis during inspiration. Our objectives were to assess PWIC's incidence and its contribution to the symptoms of upper airway obstruction (UAO), and to propose indications for intervention. In a retrospective review of consecutive endoscopic evaluations and clinical data of 108 infants with UAO, PWIC was diagnosed in 50 infants (46%). The most common presenting symptom was apnea (52%). The PWIC was accompanied by 2 to 7 synchronous airway abnormalities, most frequently laryngomalacia (78%). Generalized hypotonia was the most common associated systemic finding (80%). Severe PWIC cases required bi-level positive airway pressure (BiPAP). The severity of PWIC, measured by a newly developed classification, was positively correlated to apnea (p < .05) and the need for BiPAP (p < .054). Spontaneous recovery occurred within 36 months. The incidence of PWIC among infants with UAO is high, and its role in UAO deserves greater recognition. Better diagnosis of PWIC will improve the treatment of UAO.

Laryngomalacia

Laryngomalacia is the most common cause of stridor in neonates. It typically presents with inspiratory stridor and is often associated with feeding problems. Severe cases present with stridor, apnea, significant respiratory distress, and failure to thrive. Most patients are managed conservatively and can expect to see symptom resolution by 12-24 months of age. About 10% of patients require surgical treatment for their symptoms. Supraglottoplasty is the surgical technique of choice. Results of this surgery are excellent, and severe complications, such as supraglottic stenosis and aspiration, are uncommon. Supraglottoplasty is less effective in patients with significant comorbidities such as neurologic conditions and syndromes.

Laryngomalacia: Review and Summary of Current Clinical Practice in 2015

Laryngomalacia is the most common cause of stridor in neonates and infants. Associated feeding difficulties are present in approximately half of the children. A definitive diagnosis can generally be made with flexible fiberoptic laryngoscopy. The disorder is most often self-limited with resolution of symptoms within the first 24 months of life, and the majority of children can thus be managed conservatively. The approximately 5%-20% of children with severe or refractory disease may require more aggressive intervention, most commonly in the form of trans-oral supraglottoplasty [1,2]. High success rates and a low rate of complications have been reported for this procedure in otherwise healthy children. Children with syndromes or medical comorbidities are more likely to have complications or persistent symptoms after supraglottoplasty and may require additional interventions.

The effects of prematurity on incidence of aspiration following supraglottoplasty for laryngomalacia

OBJECTIVES

To determine if patients who were born premature have a higher incidence of aspiration following supraglottoplasty compared to patients born full term.

STUDY DESIGN

Retrospective study.

METHODS

Two thousand three hundred sixty (2360) patient charts from Riley Hospital for Children were reviewed retrospectively. Patients had already been treated for laryngomalacia with supraglottoplasty by Dr. Bruce Matt. Estimated weeks gestational age at birth was recorded for each patient. Prematurity was stratified as mild (32-36 weeks gestational age [WGA]), very (28-31 WGA), or extremely (<28 WGA). Patients were excluded from the study if they had suspected aspiration with chronic cough, pneumonia, chronic lung disease, or documented aspiration prior to supraglottoplasty.

RESULTS

As previously shown, 75 patients (3.2%) had aspiration following supraglottoplasty. Twenty of these patients were preterm infants at birth. The rate for aspiration following supraglottoplasty for former premature infants was statistically significant (5.9%, odds ratio = 2.3, P = .0032).

CONCLUSIONS

Children who were born premature have a higher rate of postoperative aspiration following supraglottoplasty; however, supraglottoplasty should still be considered as treatment for laryngomalacia as the rate is still relatively low (5.9%).

Laryngomalacia

Laryngomalacia is the most common cause of stridor in infants. Stridor results from upper airway obstruction caused by collapse of supraglottic tissue into the airway. Most cases of laryngomalacia are mild and self-resolve, but severe symptoms require investigation and intervention. There is a strong association with gastroesophageal reflux disease in patients with laryngomalacia, and thus medical treatment with antireflux medications may be indicated. Supraglottoplasty is the preferred surgical treatment of laryngomalacia, reserved only for severe cases. Proper identification of those patients who require medical and surgical intervention is key to providing treatment with successful outcomes.

Laryngomalacia surgery: a series from a tertiary pediatric hospital

Laryngomalacia is the condition responsible for 75% of the cases of stridor in children aged up to 30 months, in which there is supraglottic collapse during inhalation. Inspiratory stridor is a characteristic telltale. As many as 20% of the patients are severely affected and require surgery. Supraglottoplasty is the procedure of choice and the presence of comorbidities is the most relevant prognostic factor for surgery success.

Objective

To describe a series in a tertiary pediatric hospital, its success rates, and surgery prognostic factors.

Method

This retrospective cohort study enrolled 20 patients submitted to supraglottoplasty between July 2007 and May 2011.

Results

Thirteen (65%) patients were males; mean age at the time of the procedure was 6.32 months. Endoscopic examination showed that 12 subjects had combined forms of laryngomalacia, 40% had associated pharyngomalacia, and three also had tracheomalacia. Thirteen subjects had isolated laryngomalacia and seven had gastroesophageal reflux disease. Fifteen (75%) patients underwent aryepiglottic fold resection. After the procedure, eleven patients were asymptomatic and two required tracheostomy. Presence of comorbidities was the strongest predictor of unfavorable postoperative outcome (p = 0.034).

Conclusion

Supraglottoplasty is a safe therapeutical procedure for select patients with laryngomalacia.

Management of laryngomalacia

Laryngomalacia is the most common laryngeal disease of infancy. It is poorly tolerated in 10% of cases, requiring assessment and management, generally surgical. Surgery often consists of supraglottoplasty, for which a large number of technical variants have been described. This surgery, performed in an appropriate setting, relieves the symptoms in the great majority of cases with low morbidity. However, few data are available concerning the objective results: preoperative and postoperative objective assessment of these infants is therefore necessary whenever possible. Noninvasive ventilation (NIV) may be indicated in some infants with comorbid conditions or failing to respond to surgical management.

Management of supraglottic dysgenesis presenting as laryngomalacia

Laryngomalacia is a common source of stridor and can lead to significant upper airway obstruction and feeding disturbances in infants. We describe a unique case of supraglottic dysgenesis presenting as laryngomalacia featuring a prominent "s-shaped" epiglottis with both posterior edges fused to the right aryepiglottic fold/arytenoid complex. Although this anomaly is not accounted for in any of the current laryngomalacia classification schemes, modified laser supraglottoplasty was a satisfactory approach leading to successful decannulation. Laryngeal embryology and possible timing of the pathogenesis of this rare occurrence are reviewed as well.

Comparison between rigid and flexible laser supraglottoplasty in the treatment of severe laryngomalacia in infants

OBJECTIVE

Traditionally, laser supraglottoplasty for the treatment of severe laryngomalacia (SLM) is via rigid endoscopy (RE). Potassium-titanyl-phosphate (KTP) laser fiber can pass through a flexible endoscopy (FE) and cauterize tissue. This study is designed to evaluate and compare clinical variables between these two techniques in the treatment of SLM in infants.

METHODS

A retrospective study includes four-year period of consecutive infants who received laser supraglottoplasty. In the first two years (2006-2007), conventional RE CO(2)-laser with general anesthesia and endotracheal intubation were used. In the latter two years (2008-2009), a novel technique of FE KTP-laser with intravenous sedation, nasopharyngeal oxygen and a noninvasive respiratory support (if indicated), without any artificial airway was used immediately after the diagnostic FE. After laser surgery, infants were followed for three months. Clinical variables were analyzed and compared.

RESULTS

A total of 57 infants (27 in RE group, 30 in FE group) were enrolled. Basic variables were similar between both groups. Clinical improvement was comparable with 88.9% and 93.3% in the RE and FE groups, respectively. There are no significant differences in mean number of laser surgery, major complications, duration of post-laser respiratory support and hospitalization days, body weight percentile between the two groups. However, the durations of waiting time, operation, ET intubation and total hospital days were significantly less in the FE group.

CONCLUSIONS

FE technique has similar success rate but more convenient and cost-effective than the RE technique. It may to be a practical alternative therapy for infants with SLM.

Aspiration before and after Supraglottoplasty regardless of Technique

Objective. To determine the incidence of preoperative and postoperative aspiration in infants who undergo supraglottoplasty. To determine the effect of cold steel and CO(2) laser supraglottoplasty on aspiration in infants with severe laryngomalacia. Design. Retrospective study. Setting. Tertiary pediatric hospital. Patients. Thirty-nine patients who underwent CO(2) laser-assisted supraglottoplasty (CLS) or cold steel supraglottoplasty (CSS) for severe laryngomalacia. Main Outcome Measures. Aspiration and upper-airway obstruction. Results. Thirty-nine patients met inclusion criteria (18 males, 21 females). Eighteen patients underwent CSS and 21 patients underwent CLS. 10/39 (25.6%) of the patients had preoperative aspiration, and 2/10 (20%) resolved after supraglottoplasty. New onset aspiration was found in 4/13 (30.8%) in the CSS group and 9/16 (56.3%) in the CLS group. Conclusions. There is no significant difference in the rate of postoperative new-onset aspiration or relief of upper-airway obstruction in the CLS or CSS, is temporary and can be managed with thickened diet or temporary tube feedings. The rate of persistent postoperative aspiration was statistically similar regardless of the method of surgery.

Role of radiofrequency cautery in laryngomalacia: a study in 12 patients

Laryngomalacia is the most common condition causing inspiratory stridor at or shortly after birth accounting for approximately 60% of cases. Inspiratory stridor typically occurs after few days or week and is initially mild, but over a period of 6-9 months it gets more pronounced. Spontaneous improvement usually occurs over a period of 18 months to 2 years. Although majority of cases of laryngomalacia have benign course without any long-term sequel. Typically symptoms are worse during sleep and supine position while the same improves in prone position. There are 12 cases in the present study with the average age of the baby was 4.74 months (142 days). Male to female ratio of 1:1. Those babies with life-threatening apnea, significant cyanotic (blue) spells, failure to thrive with feeding difficulty, significant chest wall and neck retractions with breathing and requires oxygen to breathe were included in the study. One patient presented with tracheostomy tube in place. Two babies were preterm. These preterm babies were initially kept on ventilator before the final diagnosis was made. The findings were different in all the cases. The common findings are cyclical collapse of supraglottic larynx with inspiration, short aryepiglottic folds, indrawing of cuneiform and corniculate cartilages forward over the laryngeal inlet resulting in prolapse during inspiration. The surgical procedures in laryngomalacia babies were combined according to the type of laryngomalacia. The procedures performed were supraglottoplasty (Unilateral/Bilateral), epiglottoplasty, aryepiglottoplasty, aryepiglottic fold division, epiglottopexy. The procedures were performed by radiofrequency cautery under general anesthesia. The average hospital stay in nine patients was less then 36 h and more then 7 days in remaining three patients. In tracheostomized patient second surgical procedure was done as after the first procedure failed to decannulate the child. The postoperative period was uneventful. The average follow up was 10 months.

Microdebrider-assisted supraglottoplasty for laryngomalacia

OBJECTIVES

We describe our series in the surgical treatment of laryngomalacia using a microdebrider.

METHODS

We performed a retrospective review of patients who underwent microdebrider-assisted supraglottoplasty for laryngomalacia between October 2004 and February 2008. Patients with neurologic conditions and secondary airway lesions were excluded. The main outcome measures included complications, pain, resolution of stridor, presence of aspiration, and need for revision surgery.

RESULTS

Twenty-eight patients underwent microdebrider-assisted supraglottoplasty. The mean age at diagnosis was 109 days, and the mean age at the time of the procedure was 182 days. Nineteen patients (68%) had gastroesophageal reflux at diagnosis. The average operative time was 35.7 minutes (range, 11 to 65 minutes). No intraoperative complications or device problems occurred. Two patients remained intubated after the procedure. One patient required a tracheotomy, and 1 patient underwent revision supraglottoplasty. Three patients had aspiration that resolved. There was negligible pain from the procedure, as all patients immediately resumed a diet. All patients had immediate or eventual resolution of stridor.

CONCLUSIONS

This is the largest series of patients who underwent microdebrider-assisted supraglottoplasty for laryngomalacia. This procedure is relatively safe, with minimal pain, and effective in patients with laryngomalacia. Microdebrider-assisted supraglottoplasty is the method of choice for supraglottoplasty in our institution.

Abnormal Sensorimotor Integrative Function of the Larynx in Congenital Laryngomalacia: A New Theory of Etiology

OBJECTIVES/HYPOTHESIS

Laryngomalacia is an enigmatic disease in which laryngeal tone is weak, resulting in dynamic prolapse of tissue into the larynx. Sensorimotor integrative function of the brainstem and peripheral reflexes are responsible for laryngeal tone and airway patency. The goal of this study was to elucidate the etiology of decreased laryngeal tone through evaluating the sensorimotor integrative function of the larynx. The secondary goal was to evaluate factors and medical comorbidities that contribute to the wide spectrum of symptoms and outcomes.

STUDY DESIGN

Prospective and retrospective collection of evaluative data on infants with congenital laryngomalacia at two tertiary care pediatric referral centers.

METHODS

Two hundred one infants with laryngomalacia were divided into three groups on the basis of disease severity (mild, moderate, severe). Patients were followed prospectively every 8 to 12 weeks until symptom resolution or loss to follow-up. Sensorimotor integrative function of the larynx was evaluated in 134 infants by laryngopharyngeal sensory testing (LPST) of the laryngeal adductor reflex (LAR) by delivering a duration- (50 ms) and intensity- (2.5-10 mm Hg) controlled air pulse to the aryepiglottic fold to induce the LAR. Medical records were retrospectively reviewed for medical comorbidities.

RESULTS

The initial LPST was higher (P < .001) in infants with moderate (6.8 mm Hg) and severe disease (7.4 mm Hg) compared with those with mild disease (4.1 mm Hg). At 1, 3, and 6 months, infants with moderate and severe disease continued to have a higher LPST compared with those with mild disease. At 9 months, the LPST decreased in all subjects (3.1-3.5 mm Hg, P = .14), which also correlated with symptom resolution. Neurologic, genetic, and cardiac diseases were more common in infants with severe disease (P < .001). Gastroesophageal reflux disease (GERD) and feeding problems more common in those with moderate and severe disease (P < .001). Apgar scores were lower in those with severe disease (P < .001). Most symptoms resolved within 12 months of presentation. Those with GERD benefited from treatment. Supraglottoplasty resulted in few complications. Multiple comorbidities (>3) influenced the need for tracheotomy.

CONCLUSIONS

Laryngeal tone and sensorimotor integrative function of the larynx is altered. The degree of alteration correlated with disease severity, indicating that factors that alter the peripheral and central reflexes of the LAR have a role in the etiology of signs and symptoms of laryngomalacia. GERD, neurologic disease, and low Apgar scores influenced disease severity and clinical course, explaining the spectrum of disease symptoms and outcomes. Sensorimotor integrative function improved as symptoms resolved.

The surgical management of laryngomalacia

Laryngomalacia is the most common laryngeal anomaly and cause of stridor in newborns. Up to 20% of infants with laryngomalacia present with life-threatening disease that necessitates surgical management in the setting of severe airway obstruction and feeding disorders. Surgical correction of laryngomalacia has evolved over the past century from open tracheostomy to endoscopic modalities. This article provides a guide to patient assessment, surgical indication, operative technique, and perioperative management of patients with laryngomalacia. A review of surgical outcomes and complications is presented. Medical comorbidities often accompany patients with the least successful outcomes. Although complications are rare, they most commonly include persistent disease, supraglottic stenosis, and lower respiratory tract infections.

CO2 laser supraglottoplasty for severe laryngomalacia: a study of symptomatic improvement

OBJECTIVE

To investigate post-operative symptom improvement in patients with severe laryngomalacia.

STUDY DESIGN

Severe laryngomalacia was diagnosed in 138 patients (average age of 6.97 months) by bronchoscopy. Laryngomalacia was defined by the direction of supraglottic collapse: type A (posterolateral), type B (complete), and type C (anterior). As multiple laryngomalacia types within an individual were common, patients were further categorized into group I (type A only), group II (type B or B+A), and group III (type C, C+A, or C+B+A). CO(2) laser supraglottoplasty was performed. Improvements in inspiratory stridor, suprasternal retraction, substernal retraction, feeding difficulty, choking, post-feeding vomit, failure to thrive, and cyanosis were investigated. The presence of a symptom was scored as 1, and the absence as 0. The total score of symptoms was calculated for each patient. General medical history, age at time of surgery, type of laryngomalacia, post-operative intubation period, duration in ICU and dates of postoperative admission were recorded.

RESULTS

Overall symptom improvement was observed in 82.6% of patients, with statistically significant resolution evident in group III (B-value=0.79, 95% CI: -0.01, 1.59). Symptoms were not well improved in patients with cerebral palsy (n=32, B-value=-1.02, 95% CI: -1.80, -0.25; p<0.01). The two most improved symptoms were substernal retraction and suprasternal retraction, while the two least improved symptoms were choking and feeding difficulties.

CONCLUSION

CO(2) laser supraglottoplasty is an effective treatment option for severe laryngomalacia, especially for group III laryngomalacia cases in the absence of cerebral palsy. It has the superiority of facilitating significant symptomatic resolution and reducing the post-operative complications.

Laryngomalacia: A Classification System and Surgical Treatment Strategy

Laryngomalacia, the most common congenital laryngeal anomaly, is not a single disease entity but rather a variety of entities along a spectrum of underlying pathophysiologies. Based on our study of 10 children who were surgically treated for laryngomalacia in an urban tertiary care center, we have developed a system of classifying laryngomalacia on the basis of its different underlying pathophysiologic processes. Type 1 laryngomalacia is characterized by a foreshortened or tight aryepiglottic fold. Type 2 disease is defined by the presence of redundant soft tissue in the supraglottis. The type 3 designation applies to cases caused by other etiologies, such as underlying neuromuscular disorders. While the three types are not mutually exclusive, each should be considered as a separate disease entity with a final common clinical presentation. Each type requires a specific approach to surgical repair.

Laryngeal anatomic differences in pediatric patients with severe laryngomalacia

OBJECTIVES

To compare the aryepiglottic (AE) length in pediatric patients who have severe laryngomalacia (SL) and are undergoing aryepiglottoplasty with the AE length of a convenience sample of control patients without laryngomalacia.

DESIGN

Prospective case-control study.

SETTING

A tertiary-care pediatric hospital.

RESULTS

The mean AE fold length-glottic length ratio for patients with SL (0.380) was significantly lower than the mean ratio for controls (0.535) (P = .004 in 2-sample t test with unequal variance). For patients with SL, the aryepiglottoplasy procedure resulted in an average AE length increase-glottic length ratio of 0.330. Seven of the patients with SL were also diagnosed as having an underlying neurologic condition, and 18 had a diagnosis of gastroesophageal reflux disease. Two patients with SL required a tracheotomy for treatment of persistent airway obstruction.

CONCLUSIONS

In this series, patients with SL had lower AE fold length-glottic length ratios and more frequent occurrence of neuromuscular tone abnormalities (especially gastroesophageal reflux) than controls. These 2 findings may be related in that low intrauterine tone might contribute to anatomic underdevelopment.

Microdebrider-assisted supraglottoplasty

OBJECTIVE

Although laryngomalacia is a common cause for infantile stridor, few patients eventually go on to require surgical intervention. When surgery is required, the location of tissue excised may vary depending on the endoscopic findings, but only two methods of tissue excision are described-cold knife excision and carbon dioxide laser. We present our experience of using the microdebrider to excise tissue during supraglottoplasty.

METHODS

Over the last 12 months, patients were identified who had undergone supraglottoplasty, and their final outcomes with regards to resolution of stridor, cor pulmonale, and/or failure to thrive were assessed. A description of the indications for supraglottoplasty and the actual technique utilizing the microdebrider is included.

RESULTS

Five patients were identified as having undergone a microdebrider-assisted supraglottoplasty. All five had resolution of their stridor following surgery. No new complications such as aspiration or supraglottic stenosis were identified. No revision surgeries were required. The microdebrider was used to trim the aryepiglottic folds and/or redundant arytenoid mucosa in all cases.

CONCLUSIONS

The microdebrider appears to be a safe and effective tool to remove redundant tissue during supraglottoplasty.

Endoscopic correction of severe laryngomalacia

Tracheostomy for management of severe laryngomalacia is associated with significant morbidity and mortality. Two cases are reported wherein the laryngeal abnormality was corrected by ary-epiglottic fold incision and CO2 laser supraglottoplasty. Stridor and respiratory obstruction were relieved and a long term tracheostomy avoided. Endoscopic correction of laryngomalacia offers significant benefits over conventional treatment with tracheostomy in terms of decreased morbidity and improved quality of life.

Laryngomalacia: An Atypical Case and Review of the Literature

Laryngomalacia is the most common cause of stridor in newborns and infants. Patients usually present with an inspiratory stridor only, although some exhibit other anomalies. To rule out other possible pathologies, bronchoscopy is advisable. However, the authors of some recent studies have advocated the use of fiberoptic laryngoscopy as a more cost-effective and less-invasive alternative. No surgical intervention is required to treat laryngomalacia in most cases. The disease usually resolves spontaneously by the time a patient reaches the age of 24 months. In this article, we describe a case of laryngomalacia that was atypical in that the patient was 10 years old. We also review the literature in an effort to increase awareness of this condition.

Prise en charge chirurgicale des laryngomalacies sévères

INTRODUCTION

Laryngomalacia is the most common course of stridor in children: with a 50% to 75% incidence. About 50% to 60% of congenital laryngeal anomalies that present with stridor are due to laryngomalacia. In most cases, the disease followed a benign course but the prognosis is less favorable in 10% to 15% of cases. These patients may require surgical intervention.

MATERIALS AND METHODS

This prospective study included 33 patients referred to our institution from May 1998 to May 2003 for severe laryngomalacia. The diagnosis of severe laryngomalacia was based on clinical and if necessary paraclinical data. An endoscopic laser resection of arytenoid mucosal excess associated if necessary with suprahyoid epiglottectomy was performed in all patients.

RESULTS

Mean age of the children was 7.5 Months (range, 2 weeks-4 Years). Ninety-six percent of the patients had complete resolution of symptoms before the fourth postoperative week. Ninety one percents of the patients had effective oral feeding within the first Month (48% immediately after surgery). The average hospital stay was 6 days (range, 3 to 14). Weight gains were found to be satisfactory in all cases since children were discharged the hospital.

CONCLUSION

Endoscopic laryngeal surgery is an appropriate therapy for treatment of severe forms of laryngomalacia. It is a safe and effective surgical procedure.

Endoscopic division of the ary-epiglottic folds in severe laryngomalacia

OBJECTIVE

Laryngomalacia is the commonest cause of congenital stridor. The underlying anatomical abnormality associated with this condition is a prolapse of the supraglottic tissues into the laryngeal inlet during inspiration, and may involve the epiglottis, ary-epiglottic folds and the corniculate mounds of the arytenoids. However, it has been noted that the most consistent structural abnormality seen in these cases is the shortening of the ary-epiglottic folds and marked side to side curling of the epiglottis. We describe the follow-up and outcome of 33 cases treated by the simple division of the ary-epiglottic folds.

METHOD

All case notes were reviewed with respect to indications of operation, age of operation, endoscopic findings, operative technique, complications and follow-up until resolution of symptoms.

RESULTS

Surgical outcomes could only be ascertained in only 32 patients. Twenty-two cases (68.7%) showed complete resolution of stridor and associated complications of laryngomalacia. In the remaining ten cases who could be followed up (31.2%), seven patients (21.8%) showed partial resolution with no further surgery required, two patients (6.2%) required additional excision of redundant mucosa as second procedure, one patient (3%) with associated cleft lip/palate and tracheomalacia had to undergo a tracheostomy. There was improvement in feeding after surgery in all the 12 patients (100%) who had had pre-operative feeding difficulties. All the four patients with cyanosis pre-operatively were cured, but one of the two patients with apnoeic episodes pre-operatively continued to have apnoeic spells despite resolution of their laryngomalacia.

CONCLUSION

Simple endoscopic excision of the ary-epiglottic folds is a quick, reliable, highly effective procedure with very few complications. We recommend its use as the first line option in the management of severe laryngomalacia, with more extensive methods reserved for the very occasional case of primary failure.

Laser supraglottoplasty for laryngomalacia: are specific anatomical defects more influential than associated anomalies on outcome?

OBJECTIVE

To evaluate different CO2 laser procedures on children with various types of laryngomalacia and determine the role of associated anomalies on the outcome.

DESIGN

Retrospective chart review.

SETTING

Academic tertiary referral center.

PATIENTS

Twenty-three children who underwent laser supraglottoplasty for laryngomalacia between 1991 and 1998 at the UC Davis Medical Center.

INTERVENTIONS

CO2 laser vaporization of redundant supraglottic mucosa of the aryepiglottic fold, arytenoid, and the epiglottis, or modification of the latter, either individually or in combination, based on the obstructing anatomy.

OUTCOME MEASURES

Immediate, short term, intermediate and long term relief of respiratory symptoms, feeding difficulties, effect of associated anomalies on outcome, effect of specific anatomic obstructing site and surgical procedure performed on outcome, and the incidence of complications inherent to the procedure.

RESULTS

Children without associated anomalies invariably did very well, with 78% immediately resolving their respiratory symptoms and 100% within a week. Twelve of the 14 patients with unfavorable immediate results (P<0.01) and all ten with short term unfavorable results (P<0.05) had neurologic or anatomic associated anomalies. Seven patients, all with associated anomalies, were considered surgical failures (P<0.05). These patients also had a significantly longer hospital stay (P<0.01). The presence of associated anomalies was significant (P<0.01) in determining surgical treatment of reflux or the need for an NG tube in treating feeding problems. The anatomic site of abnormality and the specific procedure performed did not affect the outcome. There were no serious complications inherent to this procedure.

CONCLUSIONS

Laser supraglottoplasty, in its different modalities, is a safe and effective treatment for all types of laryngomalacia, but children with associated neurologic or anatomic anomalies will have a more complicated immediate and short term course, as well as a significant incidence of failure. Gastroesophageal reflux is an important associated condition that requires investigation in these patients, and in severe cases will merit surgical procedures to manage. The high incidence of associated neuromuscular anomalies suggests that this component has an important role in the etiology of laryngomalacia.

Laser partial epiglottidectomy as a treatment for obstructive sleep apnea and laryngomalacia

Obstructive sleep apnea (OSA) and laryngomalacia are two different entities. Occasionally, they may have a common etiology: an elongated, flaccid, and lax epiglottis that is displaced posteriorly during inspiration causing airway obstruction. Twenty-seven adults with a diagnosis of airway obstruction or OSA of various degrees, and 12 infants with severe stridor associated with frequent apneas due to laryngomalacia, who on fiberoptic examination were found to have a posteriorly displaced epiglottis, underwent partial epiglottidectomy with a CO2 laser. Their postoperative recovery was uneventful. Polysomnographic studies performed after operation in the adult patients demonstrated statistically significant improvement in 85% of the patients. In all the cases of laryngomalacia, stridor ceased permanently after surgery, together with complete cessation of the apneic episodes. This study demonstrates that similar pathophysiological mechanisms may be involved in both laryngomalacia and in OSA. Effective and relatively safe treatment can be achieved by partial resection of the epiglottis with a microlaryngoscopic CO2 laser.

Management of congenital laryngeal malformations

Congenital malformations of the larynx are relatively rare but may be life-threatening. The most common causes include laryngomalacia, vocal cord paralysis, and subglottic stenosis. The last 20 years has seen major advances in the field of surgical correction of such anomalies also serving to reduce the number of tracheotomies in children and the inherent dangers they pose. Success rates for the most popular surgical procedures have been favorable. These include supraglottoplasty for cases of severe laryngomalacia, in which relief of respiratory symptoms has been shown to occur in excess of 80% of cases. Complication rate is low, although postoperative death has been reported. Failure usually occurs in patients with concomitant airway abnormalities including pharyngomalacia. Vocal cord lateralization for vocal cord paralysis with airway compromise is achieved by means of arytenoidopexy or arytenoidectomy, using the lateral approach. Arytenoidectomy also can be performed using laryngofissure or endoscopic laser excision. Subglottic stenosis is the 3rd most common congenital anomaly. Anterior or multiple cricoid splitting with cartilage graft interpositioning is usually performed. The success rates for these procedures has been shown to be approximately 90%.

Reflux in infants with laryngomalacia: results of 24-hour double-probe pH monitoring

Laryngomalacia is the most common cause of stridor in children. Previous studies using barium esophagrams or single-probe esophageal pH testing have indicated that 68% to 80% of infants with laryngomalacia have reflux. A recent study in a large series of pediatric patients has shown that these 2 testing modalities are relatively insensitive in detecting reflux when compared with 24-hour double-probe pH testing. This study was undertaken to determine the incidence and frequency of reflux in children with laryngomalacia by use of 24-hour double-probe pH monitoring. Twenty-four children with endoscopically diagnosed laryngomalacia underwent 24-hour double-probe pH testing. The distal probe was placed in the lower esophagus, and the proximal probe was placed just above the cricopharyngeus immediately posterior to the larynx. All 24 (100%) children had pharyngeal acid exposure as judged by the proximal pH probe. These children had a mean of 15.21 episodes of reflux to the level of the pharynx during the 24-hour study period. In contrast, only 16 (66%) children had abnormal acid exposure as measured by the distal esophageal probe. These results indicate that essentially all children with laryngomalacia have reflux of gastric acid to the pharyngeal level. Multiple authors have documented the detrimental effects of acid and the accompanying pepsin in the larynx and tracheobronchial tree. Persistent laryngeal edema is an almost universal finding in patients with reflux to the pharyngeal level and is a common finding in children with laryngomalacia. In some patients with laryngomalacia, reflux may be the primary cause of their airway compromise, whereas in others it may be a significant cofactor exacerbating a preexisting neurologic or anatomic abnormality.

Laryngomalacia: a proposed classification form

Laryngomalacia is a common cause of stridor in children. The disorder has a heterogenous presentation, from the mildest form, which resolves with maturation, to the most severe form, requiring tracheotomy. While there is a vast literature on the subject, there is neither stratification nor correlation of clinical presentation, endoscopic appearance, treatment and outcome. In order to statistically evaluate the choice of treatment based upon presentation, patients must first be classified by relevant predictors of disease severity. A form is proposed to classify the clinical presentation of laryngomalacia by recording relevant historical and anatomic factors. Historical factors are classified by (1) severity of stridor; (2) weight gain; (3) age at presentation; and (4) neurologic status, forming the mnemonic SWAN. The principal anatomic site of collapse is recorded as: (1) postero-lateral; (2) posterior; or (3) anterior. Endoscopic findings consistent with gastroesophageal reflux disease (GERD) or gross aspiration are noted. Photographic and/or video documentation is performed when possible. A pilot study was undertaken to determine the ease of use of this instrument. Ten children, four boys and six girls, were classified. Ages ranged from 1-day-old to 19 months, with a mean of 9 months. Five children were examined in the clinic and five in the operating room. The form was readily and easily applied, and allowed the heterogeneity of the disorder to be organized. Wider application of this form across institutions, with classification of patients with laryngomalacia by historical and anatomic factors, should allow the accumulation of sufficient numbers of patients to allow statistical analyses of treatment and outcome as they relate to the initial presentation of this disorder of airway dynamics.

Gastroesophageal reflux association with laryngomalacia: a prospective study

OBJECTIVE

To identify the incidence and clinical role of gastroesophageal reflux (GER) in patients with laryngomalacia.

DESIGN

Prospective evaluation of consecutive infants with a new diagnosis of laryngomalacia with an initial questionnaire, a barium esophagram or 24 h pH probe and record of their subsequent clinical course.

SETTING

A large, tertiary pediatric referral center and its associated outpatient clinic.

PATIENTS

New diagnosis of laryngomalacia in 33 consecutive infants were evaluated by questionnaire and 27 of these were evaluated for GER.

RESULTS

GER was observed in 64% of patients and was significantly associated with severe symptoms and complicated clinical course (P = 0.0163). The presence of smokers in the infant's household negatively impacted his or her clinical course and symptomatology (P = 0.013) as did the presence of other major, concurrent medical problems (P = 0.065).

CONCLUSIONS

In patients with laryngomalacia, GER was significantly associated with severe symptoms (a complicated clinical course), as was smoking in an infant's household and other significant medical problems.

Discoordinate pharyngolaryngomalacia

In cases of severe laryngomalacia, laser division of the aryepiglottic folds (AEFs) or endoscopic supraglottoplasty may be an ineffective solution. Failure of this technique is rare and the reasons for failure are not well established. The purpose of this study was to describe those cases of laryngomalacia in which endoscopic treatment did not reverse the clinical situation. We introduce the concept of discoordinate pharyngolaryngomalacia (DPLM). DPLM was defined as severe laryngomalacia with complete supraglottic collapse during inspiration, without shortened AEFs or redundant mucosa, and with associated pharyngomalacia. Twenty-seven of 82 children with severe laryngomalacia presented a DPLM. Endoscopic treatment was performed in 16 children and the surgical procedure was inadequate to reverse the clinical problem in these patients. In 10 children correction of additional sites of obstruction was required (uvulopharyngopalatoplasty, surgery of choanal atresia, aortopexy). Tracheostomy was necessary in 13 children. Bi-level positive airway pressure (BiPAP) was used successfully in 2 children and tracheotomy was avoided. Treatment still needs to be better defined.

Congenital laryngomalacia

There is at present, very little information on congenital laryngomalacia in the anaesthetic literature. The purpose of this article is to review this topic, which in 90% of patients represents a benign self-limiting condition, disappearing by the age of two to five years. However, if untreated, the remaining 10% of cases can prove fatal. This severe form presents as persistent sternal recession, feeding difficulties, and failure to thrive, progressing to apnoeic attacks, cor pulmonale and eventually death. The developmental and functional anatomy of the larynx will be included, with a discussion of the pathophysiology and history of the disorder. Its diagnosis and a résumé of the various treatment strategies, will be presented. The anaesthetic management is controversial as is the surgical technology. Our technique, for diagnosis or definitive repair, is based upon suspension laryngoscopy using topical local analgesia and spontaneous ventilation. Halothane is then administered by insufflation into the pharynx, using a #8 nasopharyngeal catheter, and suction is applied to the mouth. During the surgical repair, an endotracheal tube (ETT), may be inserted, at the discretion of the anaesthetist and surgeon. Finally, the role of the dioxide CO2 laser and its hazards will be introduced.

Aetiology of stridor in Malaysian children

Eighty-five children who presented with stridor were reviewed in order to determine the aetiology of stridor in these cases. Congenital causes accounted for 57.6% of cases. Laryngomalacia was the commonest congenital abnormality (77.5%). Other common causes of stridor were a foreign body in the airway (acquired) and laryngotracheobronchitis (33.3%) (infective). Tracheostomized children are a problem in developing countries, requiring prolonged hospitalization. We overcome this problem by teaching parents how to maintain the tracheostomy tube at home.

Clinical applications of lasers in otolaryngology--head and neck surgery

The use of lasers in otolaryngology--head and neck surgery is described from the invention of the laser in 1960, through the current uses of the laser, and concludes with a summary for the future directions of laser surgery. The various lasers, including the argon, the KTP, and the carbon dioxide lasers used in otolaryngology, are briefly described. The applications of lasers in the larynx, sinuses, and the ear are separately covered, as well as pediatric otolaryngology. In addition to a brief description of the procedure, the complications and limitations are given. Anesthetic considerations are also covered.

Pediatric airway manifestations of gastroesophageal reflux

Gastroesophageal reflux (GER) in children may be classified as physiologic or pathologic, depending on its degree and consequences. There are many head and neck complications of GER in pediatric patients, but most numerous are the airway manifestations, including stridor, recurrent croup, exacerbation of subglottic stenosis, laryngeal irritation with or without laryngospasm, chronic cough, and obstructive apnea. Diagnosis may be difficult unless there is a high index of suspicion for GER and awareness of the concept of "silent" GER. We present the common pediatric airway manifestations of GER, illustrated by case reports, and provide a paradigm to assist in the diagnosis and management of children with airway compromise associated with GER.

Surgical treatment of laryngomalacia

Laryngomalacia is the commonest cause of congenital stridor. The majority of cases are mild and do not require surgical intervention. However in approximately 10 per cent of these infants the condition is life-threatening. The standard treatment for these patients has been to perform a tracheostomy. Recent reports have shown encouraging results following endoscopic surgery to the supraglottic structures. We report a series of twelve patients in whom a tracheostomy was avoided by performing an aryepiglottic fold trim--'aryepiglottoplasty'. Dramatic improvements were seen in the respiratory obstruction and failure to thrive following surgery.

The current status of corrective surgery for laryngomalacia

When the airway obstruction related to laryngomalacia becomes significant, surgical correction of the underlying laryngeal deformity is indicated. The three elements of the supraglottic soft tissue that prolapses, namely, the corniculate mounds on the arytenoid cartilages, the shortened ary-epiglottic folds, and the omega shaped epiglottis, can all be appropriately "trimmed" using either conventional instruments or the surgical laser. Relief of symptoms is dramatic and, provided surgery is performed precisely and not during episodes of infection, complications should not occur. The aid of specialized, skillful anesthesia is required for this type of surgery. We present a series of 40 children with significant obstruction: 30% had neuromuscular disorders, 68% had an infantile epiglottis, seven required airway support prior to surgery, all had laser "supraglottic trimming," and 13 required airway support after surgery. Relief of stridor and airway obstruction was generally rapid. There was only one complication: croup developing 4 days after surgery.

Evaluation of epiglottoplasty as treatment for severe laryngomalacia

Six patients with severe laryngomalacia underwent epiglottoplasty. Four of these patients had life-threatening episodes of airway obstruction before surgery; of these, two had required tracheal intubation and one had required cardiopulmonary resuscitation. Two patients had failure to thrive and two had cor pulmonale. Patients had required a mean of two hospitalizations related to upper airway obstruction. We performed polysomnography during a daytime nap, both before and after epiglottoplasty, in all patients. Respiratory effort, arterial oxygen saturation, and end-tidal carbon dioxide pressure were monitored with continuous electrocardiograms and electrooculograms. All patients had abnormal polysomnograms preoperatively. Six patients had obstructive apnea, four had hypoxemia (arterial oxygen saturation less than 90% while breathing room air), and four had hypoventilation (end-tidal carbon dioxide pressure greater than 45 mm Hg) before epiglottoplasty. Mean age (+/- SEM) at epiglottoplasty was 10.3 +/- 5.3 months. No patients had surgical complications. An endotracheal tube was in place for 25 +/- 7 hours postoperatively, and patients were discharged 4 +/- 1 days postoperatively. Polysomnography performed 2.8 +/- 1.0 months after surgery showed that all patients had improved. Two patients had residual, mild episodes of obstructive apnea, and one patient had mild hypoventilation and desaturation. No patient had further life-threatening events or required further hospitalizations after epiglottoplasty. We conclude that epiglottoplasty is an effective and safe treatment for a selected group of patients with severe laryngomalacia.