Detection of adenoidal hypertrophy using acoustic rhinomanometry

Validation of a new grading system for endoscopic examination of adenoid hypertrophy

Objective

To propose and validate a new subjective grading system of adenoid size with flexible fiberoptic evaluation.

Study Design and Setting

Digital video clips of 24 flexible fiberoptic nasopharyngeal exams were presented to 24 examiners (otolaryngology resident and consultant physicians) at a tertiary care institution. Examiners were asked to use the proposed grading system to rate adenoid hypertrophy. Kappa statistical analysis was used to evaluate the degree of intergrader agreement or disagreement.

Results

Statistical analysis of intergrader agreement demonstrated an overall Kappa score of 0.71 suggesting a “substantial” strength of agreement. The Kappa strength of agreement was found to be 0.83 (almost perfect) among consultant physicians and 0.62 (substantial) among resident physicians.

Conclusions

The proposed adenoid staging system is a reliable and consistent method of staging adenoid tissue size.

Significance

This new validated grading system may be a useful standard for reporting adenoid size in future clinical outcome studies.

ACE grading-A proposed endoscopic grading system for adenoids and its clinical correlation

OBJECTIVES

To propose a novel endoscopic adenoid grading system using a rigid nasal endoscope and to study its correlation with the clinical diagnosis.

METHODOLOGY

Prerecorded video clips of rigid nasal endoscopy taken during endoscopic adenoidectomy were retrieved. Otolaryngology consultants blinded to the clinical diagnosis of the child were presented these videos and asked to grade the adenoid hypertrophy as per the proposed endoscopic ACE (Airway/Choana/Eustachian tube) grading system. The clinical diagnosis was correlated with the different aspects of the descriptive endoscopic grading system.

RESULTS

152 video clips were presented to the otolaryngology consultants for grading. The average age was 8.6 years (SD-3.48), while the male female ratio was 3:2. The A subcomponent of the ACE grading showed significant correlation with the diagnosis of sleep disordered breathing and chronic adenotonsillitis, C subcomponent with sleep disordered breathing and the E subcomponent with the diagnosis of otitis media.

CONCLUSION

The proposed endoscopic grading is easily applicable and at the same time clearly describes the relation of the adenoids to the nasopharynx, choana and Eustachian tube. Different aspects of the grading system correlated differently with the clinical diagnosis emphasizing that a descriptive scoring rather than a comprehensive scoring is a more relevant clinical tool.

Evaluation of airway obstruction by adenoid tissue: comparison of measures in the sitting and recumbent

OBJECTIVE

To measure the airway obstruction caused by adenoid hypertrophy in the sitting and recumbent positions in search of hypothesized differences.

METHODS

Forty eight children between the ages of 2 and 12 years who sought the department of otorhinolaryngology spontaneously complaining of snoring and/or nasal obstruction. Children could be either male or female and belong to any social or racial group. Patients underwent nasal videoendoscopy sitting and lying performed by the same investigator. An image of the posterior nasopharynx was obtained from each nasal cavity of each patient for both positions. The free area of the nasopharynx was measured and compared in both positions. Image analysis was performed by two researchers other than that who carried out the examination.

RESULTS

The nasopharynx free area obtained with seated patient is, on average, 53% bigger than the free area obtained with the patient lying down (confidence interval: 95%; p<0.001). Thus, adenoidal obstruction is larger when the examination is performed with the patient lying down.

CONCLUSIONS

Nasal videoendoscopy to evaluate adenoid hypertrophy with the patient lying down makes testing more reliable, better reproducing the patient's position when sleeping. Such accuracy is essential since it influences the decision for surgical intervention in this important and widespread disease in the pediatric population.

The role of rhinomanometry after nasal decongestant test in the assessment of adenoid hypertrophy in children

INTRODUCTION

Nasal respiratory obstruction is a very common otolaryngologic problem, often caused by adenoid hypertrophy (AH). Nasal fiberoptic endoscopy (NFE) represents the gold standard method to diagnose AH. Rhinomanometry represents a valid diagnostic support.

OBJECTIVE

The aim of our study was to analyze the diagnostic value of rhinomanometry after nasal decongestant (ND) test for the evaluation of adenoid hypertrophy in children.

MATERIALS AND METHODS

Seventy-one of 97 collaborative children, aged 6-12 years, affected by upper airways obstructive symptoms and diagnosed as 'chronic oral breathers' by a standardized questionnaire were included in the study. The first evaluation included a complete physical examination, anterior rhinoscopy and anterior active rhinomanometry. Patients with a positive rhinomanometry underwent a second rhinomanometry after the administration of the nasal decongestant (ND) xylometazoline. All children were evaluated using nasal fiberoptic endoscopy (NFE).

RESULTS

At rhinomanometry a normal nasal airflow was found in 19 (26.8%) of children while nasal obstruction was underlined in 52 (73.2%). These patients were tested also with rhinomanometry after ND which confirmed the presence of nasal obstruction in 29 (55.7%) of patients. All patients included in the study underwent a NFE: 34 (47.8%) of them presented severe AH with an occlusion >75% of the choanal opening (grade ≥ 3) and 37 (52.2%) presented no or a mild form of AH (grade < 3). When compared to NFE, rhinomanometry test after ND had 82.7% sensitivity and 82.6% specificity. Positive predictive value and negative predictive value were 85.7% and 79.2%, respectively. Two receiver operating characteristic (ROC) curves were derived using data related to rhinomanometry vs NFE, and to rhinomanometry after ND vs NFE.

CONCLUSIONS

Rhinomanometry after ND, compared to rhinomanometry, is more specific and useful to evaluate nasal obstruction due to AH in children, and it may be helpful to avoid unnecessary surgical procedures in children with temporary nasal obstruction.

Correlation between otitis media and dental malocclusion in children

AIM

To determine the possible correlation between otitis media and dental malocclusion in children.

METHODS

Fifty subjects (26 males and 24 females; mean age: 7.8 +/- 1 years) were assessed: 25 patients, with otitis media formed the study group, while 25 healthy subjects formed the control group. An otolaryngological examination and dental cast measurements were performed in order to evaluate adenoids, tonsils and dental relationships, respectively.

RESULTS

A significant correlation (p<0.05) was found between otitis media and enlargement of adenoids (13 patients, 52% in the study group) and tonsils (11 patients, 44% in the study group). Furthermore, a significant predominance (p<0.05) of posterior crossbite was found in the study group (19 children, 76%), in comparison to the control group (4 children, 16%). No correlation between otitis media and overjet, overbite, Angle Class relationship, or inadequate oral habits were found.

CONCLUSIONS

Posterior cross-bite and adenoids-tonsils enlargement are factors significantly associated with otitis media in children.

Molecular characterization of Staphylococcus aureus isolated from children with adenoid hypertrophy: emergence of new spa types t7685 and t7692

OBJECTIVE

Adenoids have been associated with the pathogenesis of acute, recurrent and chronic infectious diseases of the upper respiratory system and their hypertrophy is one of the most common causes of upper airway obstruction affecting children. In this study, the characteristics of Staphylococcus aureus isolates from patients who had undergone adenoidectomy were investigated via spa typing method.

METHODS

A total of 113 children with adenoid hypertrophy who underwent adenoidectomy during September 2009 to November 2010, were included in the study. The isolates were identified to the species level as S. aureus using standard biochemical methods, following which the amplification and sequencing of the spa gene X region were carried out.

RESULTS

S. aureus was found in the adenoid tissue of 26 (23%) patients. Out of the 26 S. aureus isolates, 5 (19%), 3 (11.5%) and 3 (11.5%) were resistant to tetracycline, erythromycin and oxacillin respectively. All the isolates were susceptible to vancomycin, rifampin, ciprofloxacin, gentamicin, mupirocin and quinupristin-dalfopristin and were typed using spa typing method. All the isolates were found to include 21 spa types, including two previously unreported types (t7685 and t7692). The most prevalent spa types were t7685 (11.5%), t230 (8%), t325 (8%) and t1149 (8%).

CONCLUSION

This study demonstrates that the prevalence rate of S. aureus in the adenoid tissue of the children assessed was 23%. An interesting point to note was the dominance of the spa type t7685 that has not been previously reported by other studies.

Proposed definitive grading system tool for the assessment of adenoid hyperplasia

OBJECTIVES/HYPOTHESIS

To propose a definitive standard grading scale in the assessment of adenoid tissue in relation to size, position, and proximity to surrounding anatomic structures. This will allow for better clinical communications among practitioners when treating this pathology, a better understanding of its relationship and how it effects neighboring structures (eustachian tube and choanae), and allow for a more precise description of this tissue for the purpose of research data collection and analysis.

STUDY DESIGN

A prospective evaluation of adenoid tissue during adenoidectomy was obtained documenting its size and descriptive relationship to adjacent structures (eustachian tube and choanae).

METHODS

A convenience sample of 150 children undergoing adenoidectomy alone or concurrently with tonsillectomy and/or myringotomy and tubes were prospectively evaluated. Mirror nasopharyngeal exam was performed in all cases. Size of the adenoid, as well as its relationship to the choanae and eustachian tube were recorded. A descriptive grading system tool was created accounting for these relationships. Statistical analysis was performed to offer a preliminary validation of the tool.

RESULTS

Adenoid grading scores were assigned to 150 pediatric patients, 74 males and 76 females, who underwent surgery for adenoidectomy with or without tonsillectomy and/or myringotomy and tube placement. Seven patients were found to have no adenoid tissue in the nasopharynx as they had previous adenoidectomy and received a grade of 0A-. The mean age was 5.71 years (range, 1-17 years). Of the 150 scores, 107 patients had an associated diagnosis of chronic hypertrophic adenoids and/or tonsils (CHAT) accounting for 71.3% of the sample. There was a significant increasing trend of CHAT with an increasing size and increasing blocking of the choanae. However, there is no relationship of this morbidity with blocking of the eustachian tube (ET). There is a strong inverse relationship between blocking of the choanae and chronic and recurrent adenotonsillitis. The percentage of patients with this morbidity significantly decreases with increasing blocking of the choanae. A total of nine patients with chronic sinusitis were found to have no relationship between size, blocking of the choanae, and abutting of the eustachian tube. Eustachian tube dysfunction (ETD) was significantly related to blocking of the eustachian tube (ET) in this study, as 54.3% experienced ETD in the presence of blocked ET compared to only 15% in the absence of a blocked ET. Among the components of the adenoid score, the diagnosis given preoperatively, and the surgical treatments performed, there were strong correlations found giving merit to the descriptive nature of this grading tool proposed.

CONCLUSIONS

This grading system is simple, reliable, and easily used. It offers standardization for clinicians and researchers in facilitating communications, and allowing interpretation of adenoid tissue observed with its relationship to and effect on adjacent anatomic structures. This will allow more detailed information of findings during adenoid surgery to assist in future clinical research studies and outcomes analysis.

Assessment of adenoid size: A comparison of lateral radiographic measurements, radiologist assessment, and nasal endoscopy

OBJECTIVES

Correlate adenoid size as determined by lateral neck radiographs and intra-operative mirror exam. Determine if a radiologist's assessment of the lateral neck X-ray correlates with adenoid size. Assess the correlation of endoscopic findings to the degree of adenoid hypertrophy seen on intra-operative mirror exam. To perform a cost analysis of radiographic and endoscopic evaluations of the adenoids.

STUDY DESIGN

Retrospective study.

METHODS

Patients who underwent adenoidectomy were reviewed. The adenoid size as determined by the adenoid-to-nasopharyngeal (A/N) ratio, radiology report, and flexible nasal endoscopy were compared to the adenoid size as determined by intra-operative mirror nasopharyngeal exam. Compensation rates for each modality were compared.

RESULTS

Sixty-one children had pre-operative airway radiography. Ninety-nine patients underwent flexible nasopharyngoscopy. When the A/N ratio was compared to the intra-operative mirror exam, the Pearson Correlation coefficient was 0.64 (p<0.0001). The radiology reading was compared to intra-operative mirror exam and the Spearman Correlation coefficient was 0.29 (p=0.0258). When endoscopic nasopharyngoscopy was compared to intra-operative mirror exam, the Pearson Correlation coefficient was 0.62 (p<0.0001). The cost of nasal endoscopy was $654. Lateral airway radiography plus radiology interpretation cost $605.

CONCLUSION

Children who undergo lateral radiographs to assess adenoid size are younger than those who undergo awake flexible endoscopic nasopharyngoscopy. Both the A/N ratio and endoscopic nasopharyngoscopy correlate well with the findings of the intra-operative mirror exam. The radiologist interpretations that do not utilize the A/N ratio measurement do not correlate well with intra-operative mirror exam findings. Both modalities are comparable in cost.

Correlation between adenoid-nasopharynx ratio and endoscopic examination of adenoid hypertrophy: a blind, prospective clinical study

OBJECTIVE

To determine the reliability of adenoid-nasopharynx (A/N) ratio that is calculated on lateral cephalometric graphies for measuring the adenoid tissue size.

METHODS

85 patients that had been examined in our clinic with a prediagnosis of adenoid hypertrophy between June 2007 and March 2008 were included in the study. Local ethics committee approved the study protocol. Patients who had a previous adenoidectomy history and anatomic anomaly or acute infection in nose, palate or nasopharynx were excluded. Endoscopic nasal examination was done in all patients in addition to the routine ear nose throat examination. Lateral cephalometric graphs were obtained from all patients. Digital images obtained during endoscopic examination were evaluated on computer and obstruction ratios of adenoid tissue to choanal opening were calculated. Each cephalometric graph was evaluated by a blinded author. A/N ratio was calculated by dividing the distance from the outermost point of convexity of adenoid shadow to basiocciput to the distance between sphenobasiocciput and posterior end of hard palate (Fujioka Method). A/N ratio of each patient was then compared with the obstruction ratio obtained in nasal endoscopy. Pearson correlation test was used for statistical analysis and a p-value of <0.05 was accepted as significant.

RESULTS

There were 52 male and 33 female patients between the ages of 2 and 12 years (mean age, 5.0+/-2.2; median, 4.5). In nasal endoscopy, adenoid tissue was determined to obstruct the choanal opening as 88.5+/-12.0% (range, 51-99%) in an average. Mean adenoid nasopharynx ratio was found to be 0.87+/-0.1. There was a statistical significant correlation between A/N ratio and nasal endoscopic examination findings (r=0.511; p<0.0001).

CONCLUSIONS

A/N ratio is an easily applicable, noninvasive method that can correctly measure the size of the adenoid tissue in patients who are suspected to have adenoid hypertrophy.

Acoustic rhinometry of Asian noses

BACKGROUND

Each ethnic group has different nasal cavity geometries. The reference value of the minimal cross-sectional area (MCA) and the nasal volume (NV) is mandatory for rhinologic evaluation in regular practice and for research. This study was designed to study the normal value of acoustic rhinometry (AR) in Asian subjects in comparison with other ethnic groups.

METHODS

AR was performed in 135 healthy Thai subjects. Subjects were divided into two groups: group I, with normal anterior rhinoscopic appearance; group II included subjects with asymptomatic, slightly deviated nasal septa.

RESULTS

The mean of the MCA was 0.61 +/- 0.60 cm2 before decongestion and 0.64 +/- 0.14 cm2 after decongestion. The mean distance from the nostril to the point of MCA (D) was 1.66 +/- 0.59 cm before decongestion and 1.41 +/- 0.74 cm after decongestion. The mean of the NV measured between 0 and 4 cm was 3.66 +/- 0.67 cm3 before decongestion and 4.18 +/- 0.75 cm3 after decongestion. Before decongestion, there were no significant differences in the mean of the MCA, D, and NV between group I and group II subjects; however, there were significant differences in mean MCA and NV after decongestion. There were no differences in the parameters between male and female subjects before decongestion, except for the D, but after decongestion the mean values of the MCA, D, and NV were significantly higher in male subjects compared with female subjects.

CONCLUSION

The results of this study can be used as a reference value for Asian ethnicities. Thai subjects had measurements comparable with those of the European study and somewhat different from the study in black populations.

Measurement of nasal patency by acoustic rhinometry in Japanese school children

OBJECTIVE

The present study was planned in order to evaluate: (1) the reference value of Japanese school children at a certain grade, (2) the relationship between subjective sensation of nasal obstruction and acoustic rhinometry, and (3) relationship of acoustic rhinometry with gender and body status.

METHODS

Seventy-five school children in the second grade, which include 39 girls (52%) and 36 boys (48%), ranging in age from 7 to 8 were studied in July 2006.

RESULTS

The normal mean values of the minimal cross-sectional area and nasal volume were 0.389 and 2.63cm(3) in this group, respectively. In those with nasal obstruction sensation, the cross-sectional areas at the third and the fourth notches were significantly smaller than those without nasal obstruction sensation (p<0.05). Nasal volume weakly correlated to body weight and body mass index. The distance from the nostril to the i-notch was significantly higher in the girls than in the boys (p<0.01). The area at the i-notch was significantly higher in the boys than in the girls. Height, weight, body mass were significantly higher in the boys than in the girls (p<0.01).

CONCLUSION

Acoustic rhinometry is a useful method for evaluation of nasal patency in school children.

[Acoustic rhinometry evaluation of adenoid hypertrophy and adenoidectomy efficacy]

INTRODUCTION

Adenoid hypertrophy is a problem of more than 1/3 of children and is the predominant reason of otolaryngology consultations in this population. Diagnosis and surgical qualification are based on physical examination and other methods introduced more than 100 years ago. Development of endoscopic techniques has been found this method to be a gold standard in adenoid assessment up to date. However, the method is difficult to performed in some young patient because of their invasiveness. Acoustic assessment of nosopharyngs seems to be a new promising method.

THE AIM OF THE STUDY

Were an assessment of nasal obstruction due to adenoid hypertrophy in group of patients referring to adenoidectomy and an objective evaluation of changes in the volume of the nasopharynx after adenoidectomy.

MATERIAL AND METHODS

The examination was carried on the group of 30 patients aged 5-10 y.o. with adenoid hypertrophy admitted for adenoidectomy. The control group consisted of 10 children free of otolaryngological problems. All studied individuals had acoustic rhinometry performed and additionally, endoscopic method such as rhynofiberoscopy and endoscopy of nasopharyngs were introduced in the patient's group.

RESULTS

The study showed that children with adenoid hypertrophy have statistically significant reduction of nasopharyngeal volume (NPV) vs control group. Adenoidectomy increases the NPV parameter and makes it equal to control group.

CONCLUSIONS

The acoustic rhynometry seems to be a promising method in assessment of nasopharyngeal volume. This and further studies may help to reduce the number of "unnecessary" adenoidectomies, by making standards for NPV in different group of age.

Junior JF, Mion O, Voegels RL. Avaliação da cavidade nasal e nasofaringe através da rinometria acústica antes e após adenoidectomia

INTRODUÇÃO: A hipertrofia adenoideana é vista com freqüência na prática otorrinolaringológica e é importante avaliar a patência nasal antes do início do tratamento. Neste trabalho, os autores buscam avaliar as mudanças na geometria nasal e nasofaringe antes e após adenoidectomia através de um método objetivo de mensuração da patência nasal, a rinometria acústica. FORMA DE ESTUDO: Clínico prospectivo. OBJETIVO: Os autores avaliam a área de secção transversal mínima (ASTM) e o volume das cavidades nasais e nasofaringe através da rinometria acústica (RA) antes e após a cirurgia de adenoidectomia. MATERIAL E MÉTODO: Vinte e três crianças que tinham indicação cirúrgica para adenoidectomia com ou sem tonsilectomia foram submetidas ao exame de RA antes e 15 dias após a cirurgia. RESULTADOS: A ASTM das fossas nasais variou, antes do uso de vasoconstritor (VC), de 0,73 cm² antes da cirurgia para 0,79 cm² após a cirurgia; após o uso de VC variou de 0,87 cm² para 0,93 cm². O volume das fossas nasais variou, antes do uso de VC, de 6,18 cm³ antes da cirurgia para 6,47 cm³ após a cirurgia; após o uso de VC variou de 8,31 cm³ para 8,65 cm³. Na nasofaringe a ASTM variou, antes do uso de VC, de 2,43 cm² antes da cirurgia para 2,69 cm² após a cirurgia; após o uso de VC variou de 2,76 cm² para 3,79 cm². Na nasofaringe o volume variou, antes do uso de VC, de 5,57 cm³ antes da cirurgia para 6,14 cm³ após a cirurgia; após o uso de VC variou de 6,51 cm³ para 8,78 cm³. CCINCLUSÃO: O aumento de ASTM e volume da nasofaringe, indicando melhora da permeabilidade nasal, concorda com a melhora dos sintomas obstrutivos referidos pelo paciente e familiares após a cirurgia de adenoidectomia.

Assessment of adenoidal obstruction in children: clinical signs versus roentgenographic findings

OBJECTIVE

As part of a comprehensive study of indications for tonsillectomy and adenoidectomy, we investigated the reliability of standardized clinical assessments and standardized roentgenographic assessments of adenoidal obstruction of the nasopharynx, and the degree of correlation between clinical assessments and roentgenographic assessments.

METHODS

We rated the degree of patients' mouth breathing and patients' speech hyponasality on a 4-point scale (none = 1; mild = 2; moderate = 3; marked = 4), we averaged the ratings for each child to obtain a Nasal Obstruction Index, and we determined levels of interobserver agreement concerning the ratings. We classified lateral soft-tissue roentgenograms of the nasopharynx, based on assessments of adenoid size and of nasopharyngeal airway patency, as showing either no obstruction, borderline obstruction, or obstruction, and we determined levels of inter- and intraobserver agreement concerning the classifications. Finally, we determined correlations in individual patients between clinical ratings and roentgenographic ratings of nasal/nasopharyngeal obstruction, and calculated the predictive values of clinical ratings based on roentgenographic ratings as the gold standard.

RESULTS

In sets of paired examinations, weighted kappa values for interobserver agreement concerning mouth breathing (total, 235 children) and speech hyponasality (total, 648 children) ranged from 0.84 to 0.91. The value for interobserver agreement concerning roentgenographic assessment of nasopharyngeal airway status (207 children) was 0.92, and for intraobserver agreement (191 children) 0.88. The Kendall's tau b value for concordance between Nasal Obstruction Index values and roentgenographic ratings (1033 children) was 0.51. Nasal Obstruction Index values at the lower and upper extremes--i.e., 1.0 and > or = 3.5, respectively--were highly predictive of concordant roentgenographic ratings.

CONCLUSIONS

We conclude that standardized clinical ratings of the degree of children's mouth breathing and speech hyponasality provide reliable and reasonably valid assessments of the presence and degree of adenoidal obstruction of the nasopharyngeal airway. These clinical assessments are particularly valid at the extremes of either marked obstruction or no obstruction. Clinical assessment alone may be insufficient to establish the presence of adenoidal obstruction, but clinical assessment alone when findings are unequivocally negative can suffice to rule out adenoidal obstruction with a high degree of confidence.