Gregory J. Wiet

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OBJECTIVE The aim of this study is to investigate a new treatment regimen for macrocystic and microcystic lymphatic malformations (LM) of the head and neck. STUDY DESIGN The study represents a retrospective review of outcomes from new percutaneous treatments for lymphatic malformations. SUBJECTS AND METHODS Thirty-one patients (age range, 2 days to 51(More)
Five cases of prenatally detected neck masses that had a potential for airway obstruction at birth are described. The various options for management of the airway are discussed, including using maternal-fetal circulation until intubation, rigid bronchoscopy, tracheotomy, cyst aspiration, or extracorporeal membrane oxygen support. Congenital abnormalities(More)
OBJECTIVE Evaluate the effectiveness of surgical treatment of obstructive sleep apnea in a diverse population of children. DESIGN A retrospective case series of pre and post operative polysomnograms (PSG) of pediatric patients with obstructive sleep apnea (OSA). SETTING Tertiary care children's hospital. PATIENTS 48 patients in whom sleep studies were(More)
Advanced display technologies have made the virtual exploration of relatively complex models feasible in many applications. Unfortunately, only a few human interfaces allow natural interaction with the environment. Moreover, in surgical applications, such realistic interaction requires real-time rendering of volumetric data-placing an overwhelming(More)
Automatic scoring of resident performance on a virtual mastoidectomy simulation system is needed to achieve consistent and efficient evaluations. By not requiring immediate expert intervention, the system provides a completely objective assessment of performance as well as a self-driven user assessment mechanism. An iconic temporal bone with surgically(More)
OBJECTIVES Blunt laryngeal trauma in the pediatric population is an uncommon but unique entity that can be potentially life-threatening. Given the infrequency of these events, its management can pose a clinical dilemma. The authors review the evaluation and treatment of blunt pediatric laryngeal trauma. METHODS We present a case report and a review of the(More)
OBJECTIVE To determine the role of airway fluoroscopy in comparison with other diagnostic modalities in diagnosing the site of partial airway obstruction in children with stridor. DESIGN Prospective study comparing direct laryngoscopy and bronchoscopy with nasopharyngoscopy, airway fluoroscopy, and plain films. Children with stridor or partial airway(More)
We report on our continued development of a virtual simulation for temporal bone dissection that provides stereoscopic display, haptic feedback, and aural simulation into a straightforward, comprehensive learning environment. The multimodal interface provides a seamless simulation for non-deterministic drilling and cutting of bone in the surgical context,(More)
The intra-cochlear distributions of aspartate aminotransferase and glutaminase, prominent enzymes of aspartate and glutamate metabolism, have been studied by quantitative microchemical techniques. Also measured was choline acetyltransferase, the enzyme synthesizing acetylcholine, and a marker for the olivocochlear bundle. Aspartate aminotransferase activity(More)