Predictive Value of Laryngeal Penetration to Aspiration in a Cohort of Pediatric Patients

Videofluoroscopic swallow studies (VFSS) provide dynamic assessment of the phases of swallowing under fluoroscopic visualization and allow for identification of abnormalities in the process, such as laryngeal penetration and aspiration. While penetration and aspiration both reflect degrees of swallowing dysfunction, the predictive potential of penetration for subsequent aspiration is not fully elucidated in the pediatric population. As a result, management strategies for penetration vary widely. Some providers may interpret any depth or frequency of penetration as a proxy for aspiration and implement various therapeutic interventions (e.g., modification of liquid viscosity) to eliminate penetration episodes. Some may recommend enteral feeding given the presumed risk of aspiration with penetration, even when aspiration is not identified during the study. In contrast, other providers may advise continued oral feeding without modification even when some degree of laryngeal penetration is identified. We hypothesized that the depth of penetration is associated with the likelihood of aspiration. Identification of predictive factors for aspiration following laryngeal penetration events has significant implications for selection of appropriate interventions. We performed a retrospective cross-sectional analysis of a random sample of 97 patients who underwent VFSS in a single tertiary care center over a 6 month period. Demographic variables including primary diagnosis and comorbidities were analyzed. We examined the association between aspiration and degrees of laryngeal penetration (presence or absence, depth, frequency) across diagnostic categories. Infrequent and shallow penetration events of any type of viscosity were less likely to be associated with aspiration event(s) during the same clinical encounter regardless of diagnosis. In contrast, children with consistent deep penetration of thickened liquids invariably demonstrated aspiration during the same study. Our findings show that shallow, intermittent laryngeal penetration of any viscosity type on VFSS was not consistent with clinical aspiration. These results provide further evidence that penetration-aspiration is not a uniform clinical entity and that nuanced interpretation of videofluoroscopic swallowing findings is necessary to guide appropriate therapeutic interventions.

Evaluating the biomechanical characteristics of cuffed-tracheostomy tubes using finite element analysis

The objective of this study was to perform finite element analysis (FEA) of cuff inflation within an anatomically accurate model of an adult trachea in four different cuffed-tracheostomy tube designs. The leakage quantified by the distance between the cuff and trachea was largest for the Tracoe cuff and smallest for the Portex cuff. The smooth muscle stresses were greatest for the Portex and least for the Distal cuff, respectively. The proposed FEA model offers a promising approach to virtually evaluate the sealing efficacy of cuffed-tracheostomy tubes and the tracheal wall stresses induced by cuff inflation, prior to application.

The use of videos in preparation for pediatric otolaryngology cases-a national survey

OBJECTIVE

1) Review surgical preparation methods for pediatric otolaryngology fellows and fellowship directors, focusing on surgical video usage.

STUDY DESIGN

Cross sectional survey.

METHODS

Structured survey querying preparation methods for surgical cases was distributed to current pediatric otolaryngology fellows and fellowship program directors (FD's).

RESULTS

84 surveys were distributed (47 fellows, 37 FD). Overall response rate was 44% (37/84); fellow response rate was 55% (26/47) and FD response rate was 30% (11/37). Most respondents used videos (84%) and textbooks (95%) to prepare for surgery; fellows were more likely than FD's to use videos (96% vs. 55%, p < 0.01). 89% of respondents used YouTube to prepare; C-videos was the next most common platform used (27%). Fellows were more likely to have used YouTube than FD's (100% vs 63%, p < 0.01). 45% of FD's did not know or did not think their fellows use videos to prepare for cases. Mean helpfulness of surgical videos on a 5 point scale was 3.41 (95% CI 3.0-3.8). Videos were considered most helpful for illustrating technical portions of cases (51%), visualizing the case (27%) and reviewing anatomy (24%). Survey respondents mentioned poor quality (59%) and irrelevance to a particular institutions approach (19%) as weaknesses of available surgical videos.

CONCLUSIONS

Surgical videos are commonly used by pediatric otolaryngology fellows to prepare for cases, and can assist in building anatomic knowledge and illustrating technical details of complex cases. YouTube is the most commonly utilized platform accessed by fellows, but poor quality and limited generalizability may restrict the usefulness of current video resources.

LEVEL OF EVIDENCE

4.

Competency-Based Assessment Tool for Pediatric Esophagoscopy: International Modified Delphi Consensus

OBJECTIVES/HYPOTHESIS

Create a competency-based assessment tool for pediatric esophagoscopy with foreign body removal.

STUDY DESIGN

Blinded modified Delphi consensus process.

SETTING

Tertiary care center.

METHODS

A list of 25 potential items was sent via the Research Electronic Data Capture database to 66 expert surgeons who perform pediatric esophagoscopy. In the first round, items were rated as "keep" or "remove" and comments were incorporated. In the second round, experts rated the importance of each item on a seven-point Likert scale. Consensus was determined with a goal of 7 to 25 final items.

RESULTS

The response rate was 38/64 (59.4%) in the first round and returned questionnaires were 100% complete. Experts wanted to "keep" all items and 172 comments were incorporated. Twenty-four task-specific and 7 previously-validated global rating items were distributed in the second round, and the response rate was 53/64 (82.8%) with questionnaires returned 97.5% complete. Of the task-specific items, 9 reached consensus, 7 were near consensus, and 8 did not achieve consensus. For global rating items that were previously validated, 6 reached consensus and 1 was near consensus.

CONCLUSIONS

It is possible to reach consensus about the important steps involved in rigid esophagoscopy with foreign body removal using a modified Delphi consensus technique. These items can now be considered when evaluating trainees during this procedure. This tool may allow trainees to focus on important steps of the procedure and help training programs standardize how trainees are evaluated.

LEVEL OF EVIDENCE

5. Laryngoscope, 131:1168-1174, 2021.

Competency-Based Assessment Tool for Pediatric Tracheotomy: International Modified Delphi Consensus

OBJECTIVES/HYPOTHESIS

Create a competency-based assessment tool for pediatric tracheotomy.

STUDY DESIGN

Blinded, modified, Delphi consensus process.

METHODS

Using the REDCap database, a list of 31 potential items was circulated to 65 expert surgeons who perform pediatric tracheotomy. In the first round, items were rated as "keep" or "remove," and comments were incorporated. In the second round, experts were asked to rate the importance of each item on a seven-point Likert scale. Consensus criteria were determined a priori with a goal of 7 to 25 final items.

RESULTS

The first round achieved a response rate of 39/65 (60.0%), and returned questionnaires were 99.5% complete. All items were rated as "keep," and 137 comments were incorporated. In the second round, 30 task-specific and seven previously validated global rating items were distributed, and the response rate was 44/65 (67.7%), with returned questionnaires being 99.3% complete. Of the Task-Specific Items, 13 reached consensus, 10 were near consensus, and 7 did not achieve consensus. For the 7 previously validated global rating items, 5 reached consensus and two were near consensus.

CONCLUSIONS

It is feasible to reach consensus on the important steps involved in pediatric tracheotomy using a modified Delphi consensus process. These items can now be considered to create a competency-based assessment tool for pediatric tracheotomy. Such a tool will hopefully allow trainees to focus on the important aspects of this procedure and help teaching programs standardize how they evaluate trainees during this procedure.

LEVEL OF EVIDENCE

5 Laryngoscope, 130:2700-2707, 2020.

How design characteristics of tracheostomy tubes affect the cannula and tracheal flows

OBJECTIVES

The aim of this study was to perform computational simulations of airflow within an anatomically accurate model of an adult trachea in different tracheostomy tube designs. We hypothesized that tracheal airflow in patients is significantly influenced by the geometry and size of these devices.

METHODS

The three-dimensional (3D) geometry of the trachea was reconstructed using computed tomography scans for an adult with no history of lung disease. 3D models of four cuffed tube designs, namely Tracoe, Portex, and Shiley Proximal and Distal tracheostomy tubes were generated using geometric modeling software. Transient simulations of airflow in the tube-airway assembly were performed for each tube using computational fluid dynamics (CFD).

RESULTS

Airflow velocity was higher for the Shiley tubes compared with Portex and Tracoe tubes. For all designs, the largest magnitude of inspiratory airflow turbulence was obtained midway in the trachea. The work of breathing, quantified by the resistance of the tracheostomy tube, was lowest for Tracoe. Maximum airway wall shear stress (WSS), defined as flow-induced frictional forces, occurred at the same spatial location in all cases. Low inspiratory WSS at the carina and high expiratory airway WSS at the cuff-airway interface were observed for the Tracoe and Portex tubes.

CONCLUSION

Our CFD model offers a promising approach not only for choosing a tracheostomy tube for a patient but for improving existing tracheostomy tube designs.

LEVEL OF EVIDENCE

NA Laryngoscope, 129:1791-1799, 2019.

Swallowing dynamics status post caustic ingestion in a pediatric patient: A multidisciplinary case report

A case report of a 10 year old male illustrates the effect of damage to the tongue base, hypopharynx, cricopharyngeus, and esophagus on the sensory and motor components of the swallowing mechanism. The characteristics of the dysphagia were manifested clinically, radiographically, and endoscopically. A myectomy was required to restore functional swallowing as scar tissue formation in the cricopharyngeus severely interfered with the dynamic components of swallowing. A collaborative approach facilitated communication and effective treatment planning; the multidisciplinary components in the management of this case are discussed.

Altered Laryngeal Sensation: A Potential Cause of Apnea of Infancy

Delayed maturation of respiratory control of breathing and the laryngeal adductor reflex (LAR) are commonly implicated in infant apnea. A swallow response occurs to remove the stimulus from the pharynx to prevent aspiration once the glottis reopens. Induction of apnea by poorly cleared endogenous upper airway secretions has been postulated to be a potential cause of infant apnea. Our purpose was to determine whether alteration in the LAR, an indicator of laryngeal sensation, and the presence of secretions influenced the responsiveness of the LAR in infants with apnea. The LAR was induced in 20 infants with apnea (median gestational age, 36.5 weeks) by application of air pulses of controlled duration (50 ms) and intensity (2.5 to 10 mm Hg) to the aryepiglottic fold. Twenty infants evaluated for upper respiratory tract anomalies were used as a comparison group (median gestational age, 39 weeks). The infants with apnea required higher-intensity stimuli (p < .001) to induce the LAR (6.2 ± 1.6 mm Hg) than did the comparison group (4.3 ± 1.0 mm Hg) and demonstrated poorer clearance of secretions (p < .001). These findings were significant even when we adjusted for postconceptional age at the time of the test (p = .007). The findings of this study suggest that decreased laryngeal sensitivity results in poor endogenous secretion clearance and that it may induce a prolonged glottic closure event to prevent aspiration. This closure may play a role in infant apnea.

Airway Reconstruction in Pediatric Burn Patients

OBJECTIVE: Reconstruction of the laryngotracheal airway in pediatric burn victims has been described anecdotally as less successful than reconstruction performed in other populations. To evaluate this clinical impression, outcomes of laryngotracheal reconstruction (LTR) in pediatric burn victims were compared with a randomly selected, matched control population of children receiving LTR.

DESIGN: Retrospective case control study.

SUBJECTS: The records of 34 pediatric burn victims undergoing LTR were reviewed. A control group of 48 children undergoing LTR for acquired stenosis was randomly selected from a population matched for age and grade of stenosis.

RESULTS: Decannulation rate after 1st procedure, number of open airway procedures required, and length of time after 1st procedure until decannulation were not significantly different between the 2 groups. Two deaths (both tracheostomy tube related) occurred in the burn group; 1 occurred in the control group. Two patients in the burn group and 3 patients in the control group remain tracheostomy tube dependent at least 1 year after the initial reconstructive attempt.

CONCLUSIONS: Long-term outcomes of LTR in burn patients are not significantly different from outcomes of LTR in the pediatric acquired airway stenosis population.

A Systematic Review of Patient- or Proxy-Reported Validated Instruments Assessing Pediatric Dysphagia

Objective

Pediatric dysphagia occurs in 500,000 children each year; however, there is not a common tool to assess these children. Our aim was to identify validated patient- or parent-reported outcome assessment tools evaluating pediatric dysphagia.

Data Sources

Scopus, EMBASE, PubMed, Cochrane Library, and CINAHL electronic databases (all indexed years through August 2014).

Review Methods

Inclusion criteria included English-language articles containing instruments evaluated in children. Two investigators independently reviewed all articles, and the review was performed according to PRISMA guidelines (Preferred Reporting Items for Systematic Reviews and Meta-analyses).

Results

The initial search yielded 1697 abstracts; 158 studies were assessed further. Four symptom questionnaires, validated in adults, were used to report pediatric dysphagia outcomes. Four outcomes tools assessing dysphagia were validated in pediatrics in selected populations. The Dysphagia in Multiple Sclerosis questionnaire and the Dysphagia Symptom Questionnaire for eosinophilic esophagitis were validated in adolescents and adults. The Symptom Questionnaire for Eosinophilic Esophagitis was validated in children with eosinophilic esophagitis. The Pediatric Quality of Life Inventory Gastrointestinal Symptoms Module, validated in children with gastrointestinal disorders, includes 2 domains that assess swallowing function.

Conclusion

We did not identify any validated patient- or parent-reported outcome assessment tools examining dysphagia symptoms in a general pediatric population. However, we identified 4 questionnaires that have been validated in specific pediatric disease cohorts. Having a standardized assessment instrument validated in all children would allow clinicians to systematically report symptoms and compare results of pediatric clinical trials. With this in mind, we recommend establishing a standard questionnaire for the broader pediatric population.

Pediatric Exercise Stress Laryngoscopy following Laryngotracheoplasty

Objective

Exercise-induced airway obstruction in pediatric patients is a unique phenomenon with multiple potential etiologies. An accurate diagnosis can be challenging to establish in pediatric patients because they are frequently asymptomatic at rest. Exercise stress laryngoscopy (ESL) is a modality by which pediatric patients can be evaluated under physiologic conditions that produce their symptoms. The purpose of this study was to demonstrate (1) the diagnostic effectiveness of pediatric ESL and (2) the ability of ESL to guide treatment for “normal” and post–airway reconstruction patients with exercise intolerance.

Study Design

Case series with chart review.

Setting

Tertiary care children’s hospital.

Subjects and Methods

Patients undergoing ESL for exercise intolerance were reviewed. Demographics, surgical history, examination findings, and management recommendations were extracted.

Results

Thirty-seven patients (average age, 13.5 years; range, 5-21 years) were included. There were 14 male and 23 female patients. Airway abnormalities became evident in 56% of patients. Of these, 24% had focal supraglottic collapse, 43% had evidence of paradoxical vocal fold motion, 24% had combined supraglottic and glottic dysfunction, and 9% had distal airway abnormalities. Overall, 18 patients had changes in management after ESL. Twelve patients in this review had histories of laryngotracheoplasty with equivocal findings on operative bronchoscopy. Of these patients, 10 (83%) received focal diagnoses after ESL.

Conclusion

ESL is a contemporary modality by which complex patients with undiagnosed exercise intolerance can be effectively evaluated. ESL can be an important tool used to guide treatment in pediatric patients with exercise-induced dyspnea after airway reconstruction.

Compensatory Laryngeal Function and Airway Protection in Children Following Airway Reconstruction

Objectives:

Laryngotracheal reconstruction (LTR) procedures for repair of complex congenital or acquired airway stenosis of the larynx and/or trachea in pediatric patients have advanced over recent decades. The aim of the present project was to investigate the relationships among diagnoses, type of surgical intervention, and laryngeal findings in a post-LTR patient cohort to identify factors associated with adequate airway protection and swallowing outcomes.

Methods:

A retrospective review of 30 airway patients undergoing simultaneous or close interval functional laryngeal and swallowing examinations was completed. Analyses of the data were performed to examine factors associated with postoperative airway protection and swallowing function. The patient cohort was separated into 2 groups according to the adequacy of their airway protection (aspiration and no aspiration) as judged by clinicians via instrumental examination.

Results:

Data analyses revealed statistically significant differences between the 2 groups for 3 key parameters: laryngeal closure, laryngeal closure timeliness (relative to bolus flow), and overall swallowing coordination.

Conclusions:

These findings contribute to the knowledge of laryngeal closure patterns present in patients undergoing airway reconstruction and the effect on the essential laryngeal function of airway protection during swallowing. Implications of the data for swallowing function in this population are discussed.

Using Exercise Stress Laryngoscopy in the Pediatric Patient with Exercise Intolerance

Objectives:

Exercise induced airway obstruction in the pediatric patient is a unique phenomenon with multiple potential etiologies. Because patients are frequently asymptomatic at rest, establishing an accurate diagnosis can be challenging. Exercise Stress Laryngoscopy (ESL) presents a modality by which pediatric patients can be evaluated under physiologic conditions that produce their symptoms. The purpose of this study is to demonstrate the diagnostic utility of pediatric ESL and to guide the treatment of patients with exercise intolerance.

Methods:

All patients undergoing ESL for exercise intolerance and airway symptoms at a tertiary care children’s hospital were reviewed. Data extracted included patient demographics, exam indications, exam findings, and management recommendations.

Results:

A total of 37 patients, average age 11.8 years (range 5-19), were included. There were 14 male and 37 female patients. A specific airway abnormality became evident upon exertion in 56% of patients undergoing ESL. Of these, 24% had focal supraglottic collapse, 43% had paradoxical vocal fold motion, 24% had combined dysfunction, and 9% had distal airway abnormalities. A focal airway abnormality resulting in a change in management occurred in 71% of patients. 57% of patients in this review had a history of laryngotracheoplasty with equivocal findings on operative bronchoscopy. Of these patients, 83% received a focal diagnosis following ESL that resulted in treatment.

Conclusions:

Determining the etiology of exercise intolerance is often a challenge in the pediatric patient. ESL is a contemporary modality by which complex patients with undiagnosed airway symptoms can be effectively evaluated, frequently leading to effective treatment.

Future of pediatric tonsillectomy and perioperative outcomes

OBJECTIVE

Although commonly performed, pediatric tonsillectomy is not necessarily a low risk procedure due to potentially life threatening perioperative complications. There is paucity of literature on lethal anesthesia and surgical complications of tonsillectomy. In this article, we have reviewed both minor and serious complications following tonsillectomy. Hemorrhage, burn injuries, respiratory complications, postoperative nausea and vomiting, and pain management are discussed. We have highlighted our practice of pain management at Cincinnati Children's Hospital after tonsillectomy recent warning about codeine by the FDA on children undergoing tonsillectomy. We describe post-tonsillectomy outcomes including postanesthesia care unit stay, post discharge maladaptive behavioral outcomes and finally effective ways to identify children at risk for anesthesia and a few preventive strategies.

METHODS

In addition to literature review, the LexisNexis "MEGA™ Jury Verdicts and Settlements" database was reviewed from 1984 through 2010 for deaths and complications during and following tonsillectomy. Data including year of case, cause of death, surgical, anesthetic and postoperative opioid related complications, injury, case result, and judgment awarded were collected and analyzed.

RESULTS

The results of this analysis are presented with an emphasis on hemorrhage and on anesthesia and opioid related claims and their characteristics. Two hundred and thirty-three claim reports were reviewed. There were 96 deaths (41%) and 137 perioperative injuries (59%). Deaths were primarily related to surgery (n=46, 48%) with post-tonsillectomy bleed the most frequent cause (n=38, 40%) followed by opioid toxicity (n=17, 18%) and anesthesia complications (n=9, 9%). Non-fatal injuries included, postoperative bleeding (n=59, 25%), impaired function (n=29, 12%), anoxic events (n=20, 9%) and postoperative opioid toxicity (n=20, 8.6%). Anoxic event was noted to have the highest monetary award with a mean award at $9,017,379. Injuries (including anoxia) had higher mean monetary awards than deaths.

CONCLUSION

Tonsillectomy in children carries a high risk of perioperative complications and malpractice claims. Though postoperative bleeding is the most common complication associated with malpractice claims, anoxia related to anesthesia and opioids had the greatest overall risk from a monetary standpoint.

A preliminary investigation of four-dimensional ultrasound for evaluation of middle ear ossicles: an in vitro study

OBJECTIVE

Temporal bone imaging in children has several inherent limitations. Computed tomography has the disadvantage of ionizing radiation, possible sedation, cost and accessibility. Magnetic resonance imaging has most of these disadvantages, with the exception of radiation, and provides bone images of limited resolution. Recent advances in ultrasound have led to its increased application in numerous medical fields. The purpose of this study was to investigate the ability of four-dimensional ultrasound (4DUS) to image middle ear ossicles in vitro and determine if this technology should be adapted for future clinical use.

METHODS

Thirty cadaveric ossicles (10 malleus, 10 incus, and 10 stapes) were randomized and measured by two evaluators under a microscope. The ossicles were then immersed in a cold water bath and imaged, randomized, and measured using four-dimensional ultrasound by the same two evaluators. A separate cadaveric temporal bone, modified to allow the ultrasound probe to rest on the tympanic membrane, was imaged to visualize the ossicles in situ and evaluate whether or not the tympanic membrane and malleus would impede visualization of more medial structures.

RESULTS

Microscopic measurements were: malleus (h=8.0 mm+/-0.32, w=2.7 mm+/-0.20), incus (h=6.8 mm+/-0.41, w=5.3 mm+/-0.46), stapes (h=3.5 mm+/-0.34, w=2.4 mm+/-0.17). Inter-rater reliability was 0.8. Measurements were in agreement with previously published values. Ultrasound measurements were: malleus (h=8.0 mm+/-0.51, w=2.9 mm+/-0.27), incus (h=6.8 mm+/-0.49, w=5.5 mm+/-0.42), stapes (h=3.6 mm+/-0.41, w=2.5 mm+/-0.19). Inter-rater reliability was 0.7. Mean intra-class correlation coefficient for microscopic and ultrasound measurements was 0.7. Images of the ossicular chain in continuity in the temporal bone specimen were not as clear as images of individual ossicles that were disarticulated and imaged under water.

CONCLUSIONS

4DUS provides reasonable images of ossicles disarticulated and mounted in underwater medium. However, images of the intact ossicular chain in a modified cadaveric temporal bone were not as clear, making interpretation difficult. Further investigation into the development of a thinner ultrasound probe that can pass through the external auditory canal and into overcoming limitations of air in the middle ear cleft are warranted. This could allow for a clinically relevant, faster, lower cost and lower risk alternative to current imaging techniques.

The significance of post-operative fever following airway reconstruction

OBJECTIVE

Post-operative management of children undergoing airway reconstruction has been well-described. However, many of these patients develop post-operative fevers. We conducted a retrospective review in an attempt to define the significance of post-operative fever following pediatric airway reconstruction.

METHOD

Retrospective analysis of 78 pediatric laryngotracheoplasties (LTPs) from May 1, 2006 - April 30, 2007 at a tertiary care pediatric hospital. Fever was defined as temperature >or=38.5. A fever was "significant" if accompanied by a positive sputum, blood or urine culture, or an elevated WBC. Chest radiograph (CXR) results and co-morbidities were examined.

RESULTS

Forty-five percent of cases (35/78) had fever. Of those febrile, 46% (n=16) had significant fever. Overall, 20.5% had significant fevers. Fifty-two cases were single-stage LTP (SSLTP) with 31 febrile and 26 cases were double-stage LTP (DSLTP) with 4 febrile. SSLTP cases were at a significantly greater risk for post-operative fever compared with DSLTP, 59% vs 15% respectively (p=0.0002). 42% of febrile SSLTPs (n=13) had significant fevers compared to 50% (n=2) of febrile DSLTPs (Fisher's Exact p=1.0). 81.5% of cases with CXR findings had fevers, but only 50% of these fevers were significant. Subjects with post-operative atelectasis were more likely to have a fever compared to subjects with no post-operative atelactasis (93% vs. 33% respectively, p<0001). 30.8% of those with atelectasis had significant fever, compared to 52% of those without atelectasis (p=0.2) and 25 of SSLTPs vs. 3.9% of DSLTPs had atelactasis (p=0.027). No comorbidities were shown to be significant risk factors for post-operative fever.

CONCLUSION

Based on our review, most children undergoing LTPs will have insignificant fevers. Those children undergoing SSTLP and/or having post-operative atelectasis are at higher risk for post-operative fever. Fevers in children with double-stage procedures or all reconstruction cases with CXR findings other than atelectasis should have a thorough fever work-up.

Adding the third dimension--a new tool for constructing 3D models of the airway from 2D bronchoscopic video

OBJECTIVE

To develop a new method of using existing bronchoscopic video technology to generate a 3D model of the airway for clinical purposes.

DESIGN

Prospective pilot study with clinical correlation.

METHODS

A Storz 7200 bronchoscope was used to obtain video of a standardized tube. The images were then processed using "open source" tools which detected feature points. A three dimensional model was then constructed using these feature points. An in-house 3D image program was then used to compare the 3D model with the standardized tube. Video from a representative airway patient who had previously had a CT of the chest and a bronchoscopic examination was also analyzed using this technique. The 3D model was correlated with CT images to clinically validate this technique.

SETTING

Tertiary care hospital.

PATIENTS

One airway patient video was used for clinical validation.

OUTCOME MEASURES

(1) Average diameters of the 3D video derived tube model were compared to the actual tube and (2) a cross section of the 3D video derived patient model was compared to the patient CT derived model.

RESULTS

Repeated measures on standardized tubes demonstrated that is it possible to construct an airway model using this novel technique with a less than 5% error. Further, it is possible to construct a 3D model from patient video using existing bronchoscopic technology.

CONCLUSIONS

It is possible to extract 3D data from a sequence of 2D images. Further, this 3D model can be used for the purposes of management and planning and is quantitatively accurate and reliable. Initial data suggests that these measurements correlate with actual airway size and may provide a better instrument with which to make surgical decisions.

Clinical Practice Guideline: Hoarseness (Dysphonia)

Objective:

This guideline provides evidence-based recommendations on managing hoarseness (dysphonia), defined as a disorder characterized by altered vocal quality, pitch, loudness, or vocal effort that impairs communication or reduces voice-related quality of life (QOL). Hoarseness affects nearly one-third of the population at some point in their lives. This guideline applies to all age groups evaluated in a setting where hoarseness would be identified or managed. It is intended for all clinicians who are likely to diagnose and manage patients with hoarseness.

Purpose:

The primary purpose of this guideline is to improve diagnostic accuracy for hoarseness (dysphonia), reduce inappropriate antibiotic use, reduce inappropriate steroid use, reduce inappropriate use of anti-reflux medications, reduce inappropriate use of radiographic imaging, and promote appropriate use of laryngoscopy, voice therapy, and surgery. In creating this guideline the American Academy of Otolaryngology—Head and Neck Surgery Foundation selected a panel representing the fields of neurology, speech-language pathology, professional voice teaching, family medicine, pulmonology, geriatric medicine, nursing, internal medicine, otolaryngology–head and neck surgery, pediatrics, and consumers.

Results

The panel made strong recommendations that 1) the clinician should not routinely prescribe antibiotics to treat hoarseness and 2) the clinician should advocate voice therapy for patients diagnosed with hoarseness that reduces voice-related QOL. The panel made recommendations that 1) the clinician should diagnose hoarseness (dysphonia) in a patient with altered voice quality, pitch, loudness, or vocal effort that impairs communication or reduces voice-related QOL; 2) the clinician should assess the patient with hoarseness by history and/or physical examination for factors that modify management, such as one or more of the following: recent surgical procedures involving the neck or affecting the recurrent laryngeal nerve, recent endotracheal intubation, radiation treatment to the neck, a history of tobacco abuse, and occupation as a singer or vocal performer; 3) the clinician should visualize the patient's larynx, or refer the patient to a clinician who can visualize the larynx, when hoarseness fails to resolve by a maximum of three months after onset, or irrespective of duration if a serious underlying cause is suspected; 4) the clinician should not obtain computed tomography or magnetic resonance imaging of the patient with a primary complaint of hoarseness prior to visualizing the larynx; 5) the clinician should not prescribe anti-reflux medications for patients with hoarseness without signs or symptoms of gastroesophageal reflux disease; 6) the clinician should not routinely prescribe oral corticosteroids to treat hoarseness; 7) the clinician should visualize the larynx before prescribing voice therapy and document/communicate the results to the speech-language pathologist; and 8) the clinician should prescribe, or refer the patient to a clinician who can prescribe, botulinum toxin injections for the treatment of hoarseness caused by adductor spasmodic dysphonia. The panel offered as options that 1) the clinician may perform laryngoscopy at any time in a patient with hoarseness, or may refer the patient to a clinician who can visualize the larynx; 2) the clinician may prescribe anti-reflux medication for patients with hoarseness and signs of chronic laryngitis; and 3) the clinician may educate/counsel patients with hoarseness about control/preventive measures.

Disclaimer:

This clinical practice guideline is not intended as a sole source of guidance in managing hoarseness (dysphonia). Rather, it is designed to assist clinicians by providing an evidence-based framework for decision-making strategies. The guideline is not intended to replace clinical judgment or establish a protocol for all individuals with this condition, and may not provide the only appropriate approach to diagnosing and managing this problem.

Airway injury complicating excision of thyroglossal duct cysts

OBJECTIVES

We report on four cases of thyroglossal duct cyst (TGDC) excision using the Sistrunk procedure (resection of the mid-portion of the hyoid bone in continuity with a thyroglossal duct cyst tract) in which the airway was significantly injured. The patterns of injury, their treatment and outcomes as well as preventative measures are detailed.

METHODS

Retrospective analysis of four patients referred to a tertiary medical center after sustaining injury to the cricothyroid membrane and/or thyroid cartilages while undergoing a Sistrunk excision of a TGDC.

RESULTS

Three patients were repaired after a delay; one patient was immediately repaired. All four patients required application of cartilage grafts, and all ultimately required tracheotomy. Decannulation was achieved in the four patients after an average of 4.5 months, and none suffered from aspiration. Voice outcomes were poor in 3/4.

CONCLUSIONS

The Sistrunk procedure has been advocated for TGDC excision, citing a low recurrence rate. However, if the thyroid cartilage is mistaken for the hyoid bone, significant airway injury occurs. Urgent laryngotracheoplasty is indicated, but poor voice outcomes are anticipated.

SIGNIFICANCE

Surgeons employing the Sistrunk procedure to excise TGDC must remain oriented to midline cervical anatomy, particularly as the hyoid my override the thyroid notch in young children, placing the larynx at risk for significant injury.

Modeling flow in a compromised pediatric airway breathing air and heliox

OBJECTIVES/HYPOTHESIS

The aim of this study was to perform computer simulations of flow within an accurate model of a pediatric airway with subglottic stenosis. It is believed that the airflow characteristics in a stenotic airway are strongly related to the sensation of dyspnea.

METHODS

Computed tomography images through the respiratory tract of an infant with subglottic stenosis were used to construct the three-dimensional geometry of the airway. By using computational fluid dynamics (CFD) modeling to capture airway flow patterns during inspiration and expiration, we obtained information pertaining to flow velocity, static airway wall pressure, pressure drop across the stenosis, and wall shear stress. These simulations were performed with both air and heliox (helium-oxygen mixture).

RESULTS

Unlike air, heliox maintained laminar flow through the stenosis. The calculated pressure drop over stenosis was lower for the heliox flow in contrast to the airflow case. This led to an approximately 40% decrease in airway resistance when using heliox and presumably causes a decrease in the level of effort required for breathing.

CONCLUSIONS

CFD simulations offer a quantitative method of evaluating airway flow dynamics in patients with airway abnormalities. CFD modeling illustrated the flow features and quantified flow parameters within a pediatric airway with subglottic stenosis. Simulations with air and heliox conditions mirrored the known clinical benefits of heliox compared with air. We anticipate that computer simulation models will ultimately allow a better understanding of changes in flow caused by specific medical and surgical interventions in patients with conditions associated with dyspnea.

Cervical thymic remnants in children

OBJECTIVE

Define the clinical presentation, diagnostic value of preoperative imaging, surgical management, and outcomes of treatment of congenital cervical thymic remnants in children.

DESIGN

Retrospective cohort.

SETTING

Single tertiary care institution.

PATIENTS

20 children who underwent excision of cervical thymic remnant, 1975-2006.

MAIN OUTCOMES MEASURED

Utility of preoperative imaging to diagnose cervical thymic anomalies; success of surgical treatment of cervical thymic remnants.

RESULTS

A total of 20 children were identified, with an average age of 6.98+/-5.63 years. All ectopic thymus tissue was found in the embryonic distribution area associated with the third branchial pouch. Fourteen patients underwent excision of a cystic ectopic thymus. Four of these patients exhibited lesions isolated to the cervical region, and 10 patients displayed lesions involving cervicomediastinal areas. Six patients underwent excision of solid ectopic cervical thymus, and each of these was an unanticipated mass encountered during surgical dissection for other procedures. 83% of patients with solid ectopic cervical thymus presented at age 3 or younger. Physical exam and preoperative imaging correctly diagnosed thymic remnants in 15% patients. Resection of thymic remnants was successful in all patients, and there were no recurrences.

CONCLUSIONS

Though rare, thymic remnants should be considered in the differential diagnosis of masses presenting in locations associated with derivatives of the third branchial pouch. Though preoperative imaging is helpful in identifying the extent of these lesions, congenital thymic remnants prove difficult to diagnosis radiologically. Surgical excision is the diagnostic and therapeutic treatment of choice in the management of cervical thymic remnants.

Suction cautery and electrosurgical risks in otolaryngology

BACKGROUND

Flash fires, mucosal injuries and commissure burns during otolaryngology procedures have been largely attributed to anesthetic and surgical errors. Reports of direct electrosurgical device related events are rare. The discovery of thermal damage to the oral commissure during routine suction cautery adenoidectomy at our institution prompted a detailed investigation of the device's thermal properties. We complement this analysis with a review of electrocautery device related injuries reported in otolaryngology literature.

METHODS

FLIR Systems Thermovision A40 infrared camera was used to evaluate temperature changes along the electrosurgical wand of suction cautery devices. Shaft temperatures were measured at specific times of continuous use, distances along the shaft, and cautery settings. A literature search of electrocautery-associated injuries during upper aerodigestive procedure was then performed. Nine pediatric otolaryngologists were then interviewed for historical experience with electrocautery injuries.

RESULTS

Temperatures exceeding 60 degrees C, and sufficient to cause thermal soft tissue damage, occurred along the suction cautery wand at a setting of 40 Watts (W). These temperatures traveled far enough to appose the oral commissure when the device was simultaneously in continuous use, in the fulgurate mode, and with the suction turned off. Literature review identified eleven articles specifically pertaining to electrosurgical injuries during routine oropharyngeal procedures. Flash fires and their associated burns were the most frequently reported complication. Conversely, seven of ten cases elicited from peer interviews were oral or commissure burns attributed to improper insulation of electrocautery devices.

CONCLUSIONS

Inadvertent electrosurgical injuries during routine otolaryngology procedures can result from inadequate equipment insulation. Techniques to reduce the likelihood of these events are discussed.

The Implications of Upper-Airway Obstruction on Successful Infant Feeding

Oral feeding in infants requires highly integrated sucking, swallowing, and respiratory sequencing controlled by the neurologic system. Rapid neuromuscular coordination of oral, pharyngeal, and esophageal phases of swallowing must be coordinated with respiration in the swallowing process. When obstruction is present in the upper airway secondary to anatomic or physiologic anomalies, disruption to the oral feeding process may occur. The infant will likely be unable to coordinate sucking and swallowing with breathing in an advantageous sequence. Inefficient feeding and difficulty with airway protection during swallowing may have serious implications regarding the infant's respiratory health as well as ability to gain weight adequately. A stable and patent airway is always the first priority in the management of the infant with upper-airway obstruction. Evaluation of the infant's potential for oral feeding may occur simultaneously with the initial evaluation of the degree of airway obstruction or it may occur following medical or surgical intervention for the airway obstruction. The evaluation process and management options for oral feeding will depend upon the method used to establish a patent airway. Clinical assessment by the speech-language pathologist includes a thorough assessment of oral sensory and motor mechanics, recognition of clinical signs and symptoms of swallowing dysfunction, and consideration of referral for instrumental assessment to obtain objective information regarding airway protection and swallowing function. A variety of medical and feeding interventions may be used to help support oral feeding to whatever extent is safe and efficient. Infants with significant oral feeding problems in the presence of airway obstruction may require a period of supplemental tube feeding and non-nutritive oral stimulation.

Advances in the diagnosis and management of chronic pulmonary aspiration in children

Chronic pulmonary aspiration (CPA) in children is an important cause of recurrent pneumonia, progressive lung injury, respiratory disability and death. It is sporadic, intermittent and variable, and often occurs in children with complicated underlying medical conditions and syndromes that produce symptoms indistinguishable from CPA. For most types of aspiration there is no gold-standard diagnostic test. The diagnosis of CPA is currently made clinically with some supporting diagnostic evaluations, but often not until significant lung injury has been sustained. Despite multiple diagnostic techniques, the diagnosis or exclusion of CPA in children is challenging. This is of particular concern given the outcome of unrecognised progressive lung injury and the invasiveness of definitive therapies. Although new techniques have been introduced since the 1990s and significant advances in the understanding of dysphagia and gastro-oesophageal reflux have been made, characterisation of the aspirating child remains elusive.

Lingual hamartoma in an infant: CT and MR imaging

Lingual hamartoma is a rare tongue mass, primarily diagnosed in childhood. In most cases in the literature, the masses were surgically removed without preoperative imaging. There are only 3 cases reported in the clinical literature that describe preoperative imaging findings. We report the clinical and imaging findings in an infant with lingual hamartoma and review the literature.

Lingual cyst lined by squamous epithelium

Lingual choristomas or foregut duplication cysts are infrequently reported congenital anomalies that typically present in the perinatal period, and can cause respiratory or feeding problems. These cysts are lined by epithelial cells characteristic of the upper aerodigestive tract. We describe two children who presented shortly after birth with lingual cysts lined with squamous epithelium and foci of respiratory epithelium. Unlike previously reported lingual choristomas, these cysts did not contain gastrointestinal epithelium. In both these cases, the lingual cysts were successfully excised via a transoral approach. This article will discuss the histological findings in these two cases, the differential diagnosis and attempt to classify these lesions in the context of existing terminology.

Internet Use by Parents of Children Undergoing Outpatient Otolaryngology Procedures

OBJECTIVES

(1) To determine the prevalence of Internet medical information searches by parents prior to their child's surgical procedure, and (2) to evaluate whether Internet-based health information influences parents' medical decisions on behalf of their children.

DESIGN

A questionnaire designed to gather information regarding preoperative use of the Internet by parents of children who were scheduled to undergo outpatient otolaryngology procedures. Parents were asked to respond to questions regarding Internet searches for information specific to their child's diagnosis and anticipated surgical procedure.

SETTING

Tertiary care pediatric hospital.

RESULTS

Internet access was available to 83% of respondents. Of those parents with Internet access, 48% searched the Internet for information regarding their child's diagnosis and surgical procedure. Of those who searched the Internet, 93% said they found information that was both understandable and helpful. More important, 84% of parents using the Internet said the information influenced or somewhat influenced the medical decisions they made on behalf of their child. Only 43% of parents discussed the information they found on the Internet with their child's surgeon.

CONCLUSIONS

Approximately 50% of the parents in our study with Internet access used it to find medical information prior to their child's surgery. Parents who used the Internet found the information helpful and influential, although physicians remain the most important source of information that guides a parent or patient in their medical decision making. Ideally, surgeons would direct parents or patients to a few trusted Internet sites and be prepared to discuss this information.

Pediatric FEESST: fiberoptic endoscopic evaluation of swallowing with sensory testing

Fiberoptic endoscopic evaluation of swallowing (FEES) was developed as an adjunct to the videofluoroscopic swallowing study and clinical examination of swallowing function in the adult. The sensory testing aspect of fiberoptic endoscopic evaluation of swallowing with sensory testing (FEESST) utilizes an air pulse stimulus of mechanoreceptors within the larynx. The study can be performed safely in children as young as premature infants and in adults. Adequate levels of cooperation can be obtained in nearly all children requiring FEESST. No cases of laryngospasm or respiratory compromise have been encountered. FEESST was initially applied to patients with dysphagia. It is now used in the study of the effects of gastroesophageal reflux on the larynx and swallowing function. The extent of pooled secretions in the hypopharynx can be used as a surrogate measure of laryngopharyngeal sensory testing. When patients managed by FEESST were compared with patients managed by videofluoroscopic swallow studies, there were no statistical differences in the rates of pneumonia or pneumonia-free interval. A learning curve is present for the operator, but with basic endoscopic skills, FEESST is a skill within the scope of practice of most pediatric endoscopists.

Nonoperative Management of Complete Tracheal Rings

BACKGROUND

Children with complete tracheal rings are often challenging to manage. Most children will present early with a severely compromised airway and will require tracheal reconstruction.

OBJECTIVE

To show that a small number of minimally symptomatic patients with complete tracheal rings experience airway growth over time and do not require tracheoplasty.

DESIGN

A retrospective medical chart review over a 10-year period.

SETTING

A tertiary care pediatric hospital.

PATIENTS

Children (N = 10) with a diagnosis of complete tracheal rings, confirmed on bronchoscopy, who were observed for a minimum of 1 year prior to determining the need for tracheoplasty.

MAIN OUTCOME MEASURES

Patient symptoms, bronchoscopic findings, airway size, and the progression of these over time. Other congenital anomalies, the reason for initial diagnosis, and the need for tracheoplasty were documented.

RESULTS

The 10 patients in our series fell into the following 3 categories: 5 patients were minimally symptomatic or asymptomatic, showed bronchoscopic evidence of progressive airway growth, and did not require tracheoplasty; 2 patients had worsening symptoms of exercise intolerance, showed minimal airway growth, and ultimately required tracheoplasty; and 3 patients are still being clinically observed and may eventually require tracheoplasty. Periods of observation have varied from 1 year to over 12 years.

CONCLUSIONS

Not all patients with complete tracheal rings require tracheoplasty. Some have satisfactory airway growth and do not require airway reconstruction. A period of observation to monitor airway growth and clinical symptoms is safe and may spare some patients from undergoing unwarranted airway reconstruction.

Chronic esophageal foreign bodies in pediatric patients: a retrospective review

OBJECTIVE

Chronic esophageal foreign bodies (CEFB) are associated with a high incidence of morbidity and mortality in adults. However, the presentation, management and outcome of chronic esophageal foreign bodies in children are not well described.

METHODS

We performed a retrospective chart review of children with chronic esophageal foreign bodies admitted to the Children's Hospital Medical Center, Cincinnati, OH, between May 1990 and January 2002. A chronic esophageal foreign body was defined as a foreign body estimated to have been present for over 1 week.

RESULTS

Over the inclusion period, 522 children were admitted with esophageal foreign bodies, 41 (8%) of which were chronic. The most common foreign bodies were coins. Seventy-six percent of patients presented with a primary complaint of respiratory symptoms, with respiratory distress being the most common followed by asthmatic symptoms and cough. Twenty-two percent of patients had primarily gastrointestinal symptoms including nausea/vomiting and dysphagia. One patient was asymptomatic on presentation. A perforated esophagus was identified in 18 patients, with 17 of these being a technically perforated esophagus and one case being a classic esophageal perforation. There were no deaths or permanent morbidity in this series.

CONCLUSIONS

Respiratory symptoms are more common than gastrointestinal symptoms in pediatric patients with chronic esophageal foreign bodies. Removal by rigid esophagoscopy is recommended. A small proportion of cases require open removal of the foreign body. Conservative management is appropriate for the technically perforated esophagus. A good outcome should be anticipated for the majority of cases.

Intrapartum Management of Severe Fetal Airway Obstruction

OBJECTIVE

To review our experience with the planned intrapartum management of fetuses with suspected severe airway obstruction.

METHODS

Retrospective review of prenatal presentations, intrapartum airway procurement methods, outcomes, and complications.

RESULTS

All cases (N = 11) at our tertiary airway referral institution between 1995 and 2002 were reviewed. Obstruction was secondary to giant cervicofacial lymphangiomas (5), teratomas (2), epignathis (1), epulis (1), conjoined fetus (1), and tracheal foreign body (1). Elective cesarean delivery of the entire fetus was performed while maintaining fetal-placental circulation as long as possible. We found it necessary to deliver the entire fetus to improve airway exposure and decrease maternal hemorrhage. The airway was secured effectively in all cases.

CONCLUSIONS

Although full cesarean delivery of the fetus significantly reduces fetal-placental circulation times, in comparison with the formal ex utero intrapartum treatment (EXIT) procedure, airway access is improved, maternal complications may be decreased, and high airway procurement success is still safely achieved.

Velopharyngeal insufficiency

PURPOSE OF REVIEW

Velopharyngeal insufficiency is a niche within our specialty, but patients with hypernasality present who have never been diagnosed previously. Otolaryngologists should be familiar with current trends in diagnosis and treatment of hypernasality.

RECENT FINDINGS

Velopharyngeal insufficiency has been associated with genetic conditions and identifiable syndromes. Multiple surgical techniques are available for the treatment of this condition, the results of which vary widely in the literature. There is difficulty in interpreting the success of surgical outcomes on speech intelligibility and resonance because of the heterogeneity of the patient population and the subjective nature of assessing results. More studies are now available for the evaluation of associations of comorbid conditions and their impact on speech results.

SUMMARY

Velopharyngeal insufficiency must be diagnosed properly. Syndromes and comorbid conditions must be identified. No single specialty can care appropriately for these patients. A team approach is the ideal method of evaluating and managing patients with velopharyngeal insufficiency. Specialists with a particular interest and training in the management of patients with clefts of the palate and velopharyngeal insufficiency must collaborate to obtain the maximal functional outcome for these patients.

A rare case of combined type I and II first branchial sinus

The authors report a rare case of first branchial sinus with combined Work's type I and type II characteristics. Instead of a sinus opening in the neck, this sinus opened above the angle of the jaw in the face. The facial nerve was significantly more superficial to the tympanomastoid suture line than normal. Early diagnosis, ensuring complete resection, and avoidance of facial nerve injury are challenging issues discussed here.

Harmonic scalpel tonsillectomy in children: a randomized prospective study

OBJECTIVE

In this randomized prospective study, we evaluated postoperative morbidity after use of the Harmonic Scalpel (HS), an ultrasonic dissector coagulator (Ethicon Endo-Surgery Inc, Cincinnati, OH), or conventional electrocautery (EC) during tonsillectomy.

STUDY DESIGN AND SETTINGS

Pediatric subjects at 2 sites were randomized and underwent tonsillectomy. Intraoperative blood loss and operation duration were recorded. Postoperative parameters and complications were recorded.

RESULTS

One hundred seventeen subjects completed the study. For the HS group, mean operative time was significantly longer (P < 0.001), but intraoperative blood loss was equivalent (P = 1.000). HS subjects slept soundly on postoperative days 1, 2, 3, and 14 (P = 0.041, 0.013, 0.022, and 0.038, respectively, compared with EC group). Mean postoperative pain scores trended lower for HS subjects on postoperative days 2, 3, and 4.

CONCLUSION

The use of the HS in pediatric tonsillectomy showed no increase in intraoperative or postoperative blood loss compared with the use of EC, and HS provided possible clinical advantages over EC in patient comfort.

SIGNIFICANCE

Tonsillectomy subjects in the HS group showed a statistically significant ability to sleep soundly, suggesting that the subjects experienced less pain. These data correlate with the observed decrease in pain scores.

Surgery for pediatric vocal cord paralysis: a retrospective review

To determine the outcome of surgical procedures for bilateral vocal cord paralysis in children, we performed a retrospective review of children under 18 years of age with bilateral vocal cord paralysis and a previous tracheotomy who underwent a primary procedure at a single tertiary care institution with an aim of decannulation. The primary outcome measure was the operation-specific decannulation rate (OSDR). The overall decannulation rates, as well as morbidity rates, were also recorded. Fifty-two children met the inclusion criteria (mean age at time of primary surgery, 6.2 years; SD, 5 years). Vocal cord lateralization procedures combined with a partial arytenoidectomy achieved the highest OSDR (17/24 or 71%). This OSDR was statistically higher than the OSDRs for CO2 laser cordotomy or arytenoidectomy procedures (OSDR, 5/17 or 29%, p = .008), for isolated arytenoidopexy procedures (OSDR, 1/4 or 25%, p = .000004), or for posterior costal cartilage graft procedures (OSDR, 3/5 or 60%, p = .0004). Neither of the 2 children who underwent isolated arytenoidectomy achieved primary decannulation. The incidence of aspiration following posterior cartilage graft procedures was 15% (2/15). Subanalysis by age failed to reveal differences in OSDR. We conclude that vocal cord lateralization procedures with partial arytenoidectomy afford the highest OSDR among primary procedures for pediatric vocal cord paralysis. The CO2 laser procedures, while having limited success as a primary procedure, are effective for revision.

Harmonic scalpel for tonsillectomy

OBJECTIVE

To describe the Harmonic scalpel and review recent studies comparing its use in tonsillectomy with standard dissection and electrocautery.

STUDY DESIGN

Review.

METHODS

The Harmonic scalpel uses ultrasonic technology to cut and coagulate tissues at lower temperatures than those associated with electrocautery and lasers. Studies of the use of this device have assessed its performance with respect to intraoperative blood loss, postoperative hemorrhage, and postoperative pain.

RESULTS

Intraoperative blood loss and episodes of postoperative hemorrhages have been found to be minimal in patients in whom the Harmonic scalpel was used for tonsillectomy. The device also appears to be associated with a reduction in postoperative pain.

CONCLUSION

Use of the Harmonic scalpel for tonsillectomy may have several advantages over standard methods.

Left ventricular hypertrophy and abnormal ventricular geometry in children and adolescents with obstructive sleep apnea

Obstructive sleep apnea (OSA) has been shown to be an independent risk factor for cardiovascular disease in adults. However, there are severe limitations in the extent to which the cardiovascular consequences of OSA are being studied in children. To investigate the echocardiographic changes in children with OSA, right and left ventricular (RV, LV) dimensions and LV mass index and geometry were measured in 28 children with OSA and 19 children with primary snoring (PS). The study showed that LV mass index and relative wall thickness were greater in the OSA group compared with those with PS (p = 0.012 and p < 0.0001, respectively). An apnea-hypopnea index of more than 10 per hour was significantly associated with RV dimension above the 95th percentile (odds ratios, 6.7; 95% confidence interval, 1.4-32) and LV mass index above the 95th percentile (odds ratios, 11.2; confidence interval, 1.9-64). Abnormality of LV geometry was present in 15% of children with PS compared with 39% of children with OSA. We conclude that OSA in children is associated with increased LV mass.

Congenital high airway obstruction syndrome and airway reconstruction: an evolving paradigm

OBJECTIVES

To refine the classic definition of, and provide a working definition for, congenital high airway obstruction syndrome (CHAOS) and to discuss the various aspects of long-term airway reconstruction, including the range of laryngeal anomalies and the various techniques for reconstruction.

DESIGN

Retrospective chart review.

PATIENTS

Four children (age range, 2-8 years) with CHAOS who presented to a single tertiary care children's hospital for pediatric airway reconstruction between 1995 and 2000.

CONCLUSIONS

To date, CHAOS remains poorly described in the otolaryngologic literature. We propose the following working definition for pediatric cases of CHAOS: any neonate who needs a surgical airway within 1 hour of birth owing to high upper airway (ie, glottic, subglottic, or upper tracheal) obstruction and who cannot be tracheally intubated other than through a persistent tracheoesophageal fistula. Therefore, CHAOS has 3 possible presentations: (1) complete laryngeal atresia without an esophageal fistula, (2) complete laryngeal atresia with a tracheoesophageal fistula, and (3) near-complete high upper airway obstruction. Management of the airway, particularly in regard to long-term reconstruction, in children with CHAOS is complex and challenging.

Surgery for pediatric subglottic stenosis: disease-specific outcomes

To set the foundation to develop a disease-based, operation-specific model to predict the outcome of pediatric airway reconstruction surgery, we performed a retrospective database review of children operated on at a single, tertiary-care children's hospital. Over the 12-year period 1988 to 2000, a total of 1,296 airway reconstruction procedures were performed. Out of these, charts were identified for 199 children who underwent laryngotracheal reconstruction for a sole diagnosis of subglottic stenosis. Children were excluded from the study if their disorder included supraglottic, glottic, or upper tracheal disease. The main outcome measures were Myer-Cotton grade-specific decannulation and extubation rates, including both operation-specific and overall results. There were 101 children who underwent double-stage laryngotracheal reconstruction. The operation-specific decannulation rates for Myer-Cotton grades 2, 3, and 4 were 85% (18/21), 37% (23/61), and 50% (7/14) (chi2 analysis, p = .0007). The overall decannulation rates were 95% (20/21), 74% (45/61), and 86% (12/14) (chi2 analysis, p = .04). There were 98 children who underwent single-stage laryngotracheal reconstruction. The operation-specific extubation rates for Myer-Cotton grades 2, 3, and 4 were 82% (37/45), 79% (34/43), and 67% (2/3) (chi2 analysis, p = .63). The overall extubation rates were 100% (45/45), 86% (37/43), and 100% (3/3) (chi2 analysis, p = .03). Logistic regression analysis showed no effect of age (less than or greater than 2 years of age) on operation-specific or overall outcome parameters. We conclude that laryngotracheal reconstruction for pediatric subglottic stenosis remains a challenging set of procedures in which multiple operations may be required to achieve eventual extubation or decannulation. Children with Myer-Cotton grade 3 or 4 disease continue to represent a significant challenge, and refinements of techniques are being examined to address this subset of children. Disease-based, operation-specific outcome statistics are the first step in the development of a meaningful predictive model.

Topical mitomycin application after laryngotracheal reconstruction: a randomized, double-blind, placebo-controlled trial

OBJECTIVE

To explore the effect of mitomycin treatment on the pediatric airway following laryngotracheal reconstruction.

DESIGN

Randomized, double-blind, placebo-controlled trial.

PATIENTS

Children aged 2 to 17 years with subglottic or upper tracheal stenosis undergoing laryngotracheal reconstruction at a single, tertiary care, children's hospital.

INTERVENTION

At the time of extubation or stent removal, the children underwent bronchoscopy and 0.4 mg/mL (2 mL of a 0.2-mg/mL solution of either mitomycin or an equal volume of isotonic sodium chloride was directly applied to the subglottic region for a single application of 2 minutes. These children then underwent interval endoscopy at 2 weeks, 6 weeks, and 3 months postoperatively for assessment of their airways.

RESULTS

Granulation tissue was graded on a scale of 0 (none) to 4 (near-total or total occlusion). Videotapes of endoscopies were independently observed and graded by 3 pediatric otolaryngology fellows with a subsequent interobserver agreement of 91.6%. The results were then dichotomized to represent a single cohort in which further surgical intervention would be required and another separate cohort in which further surgery would not be required. At the 1-year mark, interim analysis was performed by a Data Safety and Monitoring Committee. At this time, 13 children had been randomized to the mitomycin-treated arm of the study and 11 children to the placebo-treated arm. A 2-tailed Fisher exact test revealed a value of 1.00. The Data Monitoring and Safety Committee advised that the trial should be stopped because the distributions between the 2 populations were almost identical.

CONCLUSION

We cannot reject the null hypothesis that a single topical dose of mitomycin exerts an equal benefit as does isotonic sodium chloride when applied to the pediatric airway after laryngotracheal reconstruction.

Posttonsillectomy hemorrhage: what is it and what should be recorded?

OBJECTIVES

To report on our incidence of posttonsillectomy hemorrhage and to define what constituted posttonsillectomy bleeding.

DESIGN

Retrospective study.

SETTING

Tertiary care children's hospital and a local satellite facility.

PATIENTS

A series of 1438 consecutive patients who had undergone either tonsillectomy or adenotonsillectomy between January 1, 1999, and December 31, 1999.

INTERVENTION

During this period, parents were instructed to return with their children for clinical evaluation if any blood was seen in the postoperative period.

MAIN OUTCOME MEASURES

Postoperative day of evaluation, age, sex, location of bleeding, management strategy, length of hospital admission, and any bleeding disorders were noted for each patient.

RESULTS

A total of 112 patients underwent evaluation 134 times. Of these patients, 96 required only 1 evaluation and 16 required more than 1 evaluation. All patients who had more than 1 evaluation required intervention. The total number of children requiring intervention for posttonsillectomy hemorrhage was 51 (3.5%) of the 1438 patients. Female patients were more likely than male patients to return for evaluation. Patients who were 12 years and older were the most likely and those 3 years and younger were the least likely to have posttonsillectomy hemorrhage. The most common time from surgery to initial evaluation for hemorrhage was 6 days.

CONCLUSIONS

By reviewing our own criteria for defining and recording posttonsillectomy hemorrhage, we conclude that posttonsillectomy hemorrhage is defined differently in the literature. This supports the need for a standard definition to allow for direct comparisons.