Faculty Bibliography

Our experience with 20 cases of blunt fractures of the thyroid cartilage encountered over the last 15 years were reviewed. These injuries were classified into one of three categories: nondisplaced with minimal associated laryngeal injuries (four cases), moderately displaced with intralaryngeal defects (12 cases), and severe fractures with intralaryngeal avulsion injuries (four cases). Treatment consisted of either surgical reduction of fracture (and associated intralaryngeal injuries) or conservative, nonsurgical management. Results were graded subjectively as good, fair, or poor for airway and voice

The degree of turbulent noise in the breathy voice of 25 patients with incomplete glottal closure was determined by PARCOR (PARtial autoCORrelation) analysis. From 10,000 acoustic data points, 44 PARCOR coefficients were calculated to form the residue wave which is representative of the glottal source. The power difference between the residue wave and the original acoustic wave was calculated in order to define a new measurement of acoustic power termed the turbulent noise ratio (TNR). The 25 patients were studied before and after Isshiki thyroplasty type I (IttI). The TNR became smaller in 24 of these patients following IttI, and corresponded closely with acoustic (Fukazawa's Br-Index), aerodynamic (Isshiki's AC/DC ratio), mean airflow rate during phonation, and videolaryngostroboscopic findings. Data affirm that the TNR accurately reflects the degree of turbulent noise at the glottal source

The otolaryngologist is frequently consulted for paranasal sinus disease which has been identified as an incidental finding on computed tomography (CT) in children. The significance of such a finding is difficult to interpret without prior knowledge of the actual incidence of chronic sinus mucosal hypertrophy in the general pediatric population. In this study of pediatric CT scans from busy otolaryngology and ophthalmology clinics, the radiographic incidence of sinus disease in the general pediatric population is estimated. One hundred forty-two CT scans of the orbits and temporal bones obtained over an 18-month period were reviewed. Fifty-eight (41%) scans showed some mucosal thickening or opacification in at least one sinus. When patients were stratified by age, or by the presence or absence of chronic otitis media or respiratory tract disease, exclusive of clinical sinusitis, there was no statistical difference between groups. The authors conclude that the asymptomatic child with an incidental paranasal sinus finding on CT scan need not be worked up further unless clinical symptoms and signs are elicited.

Reconstructive techniques for the stenotic pediatric airway have greatly enhanced the otolaryngologists ability to decannulate the tracheotomy-dependent child. Stents have played an important role in this process by both maintaining the reconstructed lumen and acting as a scaffold. However, decannulation is often not achieved after the first surgical intervention with some patients requiring two, three or more procedures. In an effort to improve upon the design of today's stents, an open stented tracheotomy tube was evaluated at our institution. This stent is designed to provide advantages of immediate postoperative voice and nutrition, and ease of evaluation, as well as to provide for safe and adequate healing. Four patients underwent laryngotracheal reconstruction with this stent over a 10-month period. All patients could vocalize and eat immediately postoperatively but recalcitrant granulation tissue and restenosis has prevented decannulation in three of the cases. The experience with this stent exemplifies the persistent difficulties of stent use in pediatric airway reconstruction. It also points out that progress is still needed in current reconstructive techniques as well as in the development of new techniques.

Endoscopic instruments have revolutionized surgical diagnosis and treatment. Recently, a high resolution microfiberoptic endoscope has been developed that has vast potential for otologic use. This microfiberoptic endoscope was used in cadaver and human studies to visualize the middle ear cavity. The technique used involved placing a 1.0-mm or smaller microfiberoptic scope into the middle ear via a tympanic membrane perforation, through a myringotomy tube or up the eustachian tube. Using the scope, the mesotympanum and hypotympanum can be well visualized. Similarly, the round window, oval window, ossicular chain, and related structures can be clearly demonstrated and recorded photographically. This technique has great potential to enhance diagnosis without open surgery

Although previous efficacy studies have reported high compliance rates among children treated by private physicians with prophylactic antibiotics for prevention of otitis media, compliance rates in a lower socioeconomic, urban clinic population have not been well described. Eighty children who were placed on daily low dose antibiotics in the Pediatric Otolaryngology Clinic at Bellevue Hospital were prospectively followed in order to estimate compliance in this population. Compliance was estimated by the parent's stated word alone. Of the 77 patients with records adequate for analysis, only 36 (46.8%) families claimed compliance, 18 (23.4%) admitted non-compliance, and 23 (29.9%) did not reliably return for follow-up clinic visits. Statistical analysis revealed that no single characteristic of the patient population or the treatment regimen strongly influenced compliance. The factors examined included: the child's age, sex, race and otologic diagnosis, the type of prophylaxis prescribed, the parent's ability to speak English, national origin, consistency of follow-up, and method of payment. Based on these results, less than half of the children attending an inner city clinic compiled with maintenance medication. The clinician should consider alternate treatment modalities, such as the insertion of middle ear ventilation tubes, if poor compliance with prolonged antibiotic treatment is suspected