bluuebunny/crossref_metadata_2025_split huggingface dataset:
Expression of Oncostatin M in Chronic Obstructive Sialadenitis of the Submandibular Gland
Authors: Lee Heung-Man , Cho Jae-Goo , Kang Hee-Joon , Chae Sung-Won , Hwang Soon-Jae , Jung Kwang-Yoon , Woo Jeong-Soo 
Published: October 2014

Objectives: We investigated the expression of oncostatin M messenger RNA (mRNA) and protein in normal submandibular glands and those with chronic obstructive sialadenitis and localized the expression of o costatin M protein. Methods: Submandibular glands from 10 patients with chronic obstructive sialadenitis as a study group and 10 normal submandibular glands as a control group were examined. Oncostatin M mRNA extracted from submandibular gland was used for reverse transcription–polymerase chain reaction and analyzed semiquantitatively. The difference in expression level of oncostatin M protein between the 2 groups was analyzed through Western blot analysis, and oncostatin M protein was localized immunohistochemically. Results: The expression levels of oncostatin M mRNA and protein were significantly increased in the study group. The protein was predominantly localized in ductal epithelia and infiltrating inflammatory cells and was more strongly expressed in the study group also. Conclusions: Oncostatin M is expressed in both chronic obstructive sialadenitis and normal submandibular gland, and is up-regulated in chronic obstructive sialadenitis. These results suggest that oncostatin M is involved in the pathologic process of chronic obstructive sialadenitis. However, the physiologic role in normal glands, as well as a possible role in the development of chronic obstructive sialadenitis, remains to be elucidated.
Glycosaminoglycan Composition of the Vocal Fold Lamina Propria in Relation to Function
Authors: Hahn Mariah S. , Jao Cindy Y. , Faquin William , Grande-Allen K. Jane 
Published: October 2014

Objectives: This study was designed to quantify the specific glycosaminoglycans (GAGs) in the midmembranous vocal fold (VF) lamina propria (LP) and to interpret their presence in relation to the known stresses borne by each LP layer. Methods: GAGs from normal human LP and from both normal and scarred canine LPs were analyzed by fluorophore-assisted carbohydrate electrophoresis (FACE). Immunostaining was conducted to give insight into the spatial distribution of each GAG type. Results: Hyaluronan composes roughly 0.64% ± 0.41% of the human LP as measured relative to tissue total protein. Chondroitin sulfate and/or dermatan sulfate (CS/DS), keratan sulfate, and heparan sulfate chains constitute approximately 23.9% ± 12.1%, 14.7% ± 6.1%, and 61.4% ± 13.6%, respectively, of human LP sulfated GAGs. Conclusions: Observed CS/DS sulfation patterns imply that versican is a major contributor to human LP CS levels. In addition, examination of LP GAG with respect to gender revealed a significant variation in total levels of CS/DS and a potential difference in the levels of versican relative to decorin and biglycan. In dogs, LP scarring appeared to result in a reduction in hyaluronan and CS/DS. These FACE results were combined with histologic data to update current descriptive models linking LP microstructure with the regional variations in LP loading.
Coblation-Assisted Lingual Tonsillectomy for Dysphagia Secondary to Tongue Base Hypertrophy
Authors: Bock Jonathan M. , Trask Douglas K. 
Published: October 2014

Objectives: Lingual tonsillar hypertrophy is an underappreciated cause of dysphagia and is believed to impede swallowing function by inhibition of laryngeal elevation and epiglottic inversion due to mechanical interference by bulky tongue base tissue. We present a case of severe dysphagia secondary to idiopathic tongue base hypertrophy that was treated with coblation lingual tonsillectomy and tongue base reduction. Methods: We report a case and discuss the relevant literature regarding tongue base hypertrophy and surgical interventions to treat the enlarged base of the tongue. Results: Symptoms of dysphagia and globus sensation and signs of decreased epiglottic inversion and laryngeal penetration improved markedly after surgical reduction of hypertrophied lingual tonsillar tissue using coblation. Preoperative and postoperative clinical imaging and radiographs are presented to show the reduction of tongue base size, correlated with the patient's improved clinical function. Conclusions: Coblation-assisted lingual tonsillectomy and tongue base reduction can successfully treat dysphagia secondary to tongue base hypertrophy.
Prospective Study of the Impact of Thyroid Hormone Replacement on Objective Voice Parameters
Authors: Birkent Hakan , Karacalioglu Ozgur , Merati Albert L. , Akcam Timur , Gerek Mustafa 
Published: October 2014

Objectives: Hypothyroidism has long been considered to have an impact on phonation. In this study, objective evaluation of vocal function in women with hypothyroidism was performed in order to characterize potential dysphonia; their subsequent response to thyroid hormone replacement was prospectively studied. It was hypothesized that thyroid hormone replacement therapy in this cohort would have an objectively measurable impact on vocal function. Methods: Prospective evaluation of objective voice parameters and concurrent determination of serum thyroid status was executed both before and after thyroid hormone replacement in a cohort of patients who had had total thyroidectomy. Objective voice parameters before and after treatment were compared. Results: Twenty-four female subjects were recruited over an 18-month period. After surgery, all subjects were hypothyroid (mean thyroid-stimulating hormone level, 81.38 mIU/L; range, 25.26 to 100.00 mIU/L) before replacement. After hormone therapy, their mean thyroid-stimulating hormone level dropped to 1.20 mIU/L (range, 0.28 to 3.83 mIU/L). The mean fundamental frequency significantly increased from a pretreatment average of 223.48 ± 36.10 Hz to 237.64 ± 38.81 Hz. Other measured voice parameters (jitter, shimmer, amplitude perturbation quotient, pitch perturbation quotient, noise-to-harmonics ratio, and maximum phonation time) were not affected. Conclusions: Thyroid hormone replacement therapy following total thyroidectomy has a measurable impact on mean fundamental frequency in female patients. The mechanism of this effect is not known.
Optical Coherence Tomography—Enhanced Microlaryngoscopy: Preliminary Report of a Noncontact Optical Coherence Tomography System Integrated with a Surgical Microscope
Authors: Vokes David E. , Jackson Ryan , Guo Shuguang , Perez Jorge A. , Su Jianping , Ridgway James M. , Armstrong William B. , Chen Zhongping , Wong Brian J. F. 
Published: October 2014

Objectives: Optical coherence tomography (OCT) is a new imaging modality that uses near-infrared light to produce cross-sectional images of tissue with a resolution approaching that of light microscopy. We have previously reported use of OCT imaging of the vocal folds (VFs) during direct laryngoscopy with a probe held in contact or near-contact with the VFs. This aim of this study was to develop and evaluate a novel OCT system integrated with a surgical microscope to allow hands-free OCT imaging of the VFs, which could be performed simultaneously with microscopic visualization. Methods: We performed a prospective evaluation of a new method of acquiring OCT images of the VFs. Results: An OCT system was successfully integrated with a surgical microscope to permit noncontact OCT imaging of the VFs of 10 patients. With this novel device we were able to identify VF epithelium and lamina propria; however, the resolution was reduced compared to that achieved with the standard contact or near-contact OCT. Conclusions: Optical coherence tomography is able to produce high-resolution images of vocal fold mucosa to a maximum depth of 1.6 mm. It may be used in the diagnosis of VF lesions, particularly early squamous cell carcinoma, in which OCT can show disruption of the basement membrane. Mounting the OCT device directly onto the operating microscope allows hands-free noncontact OCT imaging and simultaneous conventional microscopic visualization of the VFs. However, the lateral resolution of the OCT microscope system is 50 μm, in contrast to the conventional handheld probe system (10 μm). Although such images at this resolution are still useful clinically, improved resolution would enhance the system's performance, potentially enabling real-time OCT-guided microsurgery of the larynx.
Post-Laryngectomy Speech Respiration Patterns
Authors: Stepp Cara E. , Heaton James T. , Hillman Robert E. 
Published: October 2014

Objectives: The goal of this study was to determine whether speech breathing changes over time in laryngectomy patients who use an electrolarynx, to explore the potential of using respiratory signals to control an artificial voice source. Methods: Respiratory patterns during serial speech tasks (counting, days of the week) with an electrolarynx were prospectively studied by inductance plethysmography in 6 individuals across their first 1 to 2 years after total laryngectomy, as well as in an additional 8 individuals who had had a laryngectomy at least 1 year earlier. Results: In contrast to normal speech that is only produced during exhalation, all individuals were found to engage in inhalation during speech production, and those studied longitudinally displayed increased occurrences of inhalation during speech production with time after laryngectomy. These trends appear to be stronger for individuals who used an electrolarynx as their primary means of oral communication rather than tracheoesophageal speech, possibly because of continued dependence on respiratory support for the production of tracheoesophageal speech. Conclusions: Our results indicate that there are post-laryngectomy changes in the speech breathing behaviors of electrolarynx users. This has implications for designing improved electrolarynx communication systems, which could use signals derived from respiratory function as one of many potential physiologically based sources for more natural control of electrolarynx speech.
Laryngeal Carcinoma in Nonsmoking Patients
Authors: Hamzany Yaniv , Hadar Tuvia , Feinmesser Raphael , Guttman Dan , Shvero Jacob 
Published: October 2014

Objectives: Smoking is a known risk factor for laryngeal carcinoma. We sought to describe the clinicopathologic characteristics and outcomes of nonsmoking patients with laryngeal carcinoma. Methods: Of 1,443 patients treated for laryngeal carcinoma between 1960 and 2006, 55 (3.8%) were nonsmokers: 40 (73%) had never smoked and 15 (27%) had stopped smoking 12 years or more before diagnosis. Patient characteristics and outcomes were reviewed. Results: The study group consisted of 87% men; the mean age at diagnosis was 67 years. All lesions but one were located in the glottis. The 5-year survival rate for the whole group was 85%. Most tumors were detected early. Of 38 patients (69%) with stage T1 disease, there was no significant difference in prognostic features between those who had never smoked and those who had smoked in the past. Conclusions: Fewer than 5% of patients with laryngeal carcinoma were nonsmokers. Like smokers, this subgroup was characterized by a male predominance and an approximate age at diagnosis in the seventh decade. Unlike smokers, nonsmokers show a greater predilection for glottic rather than supraglottic disease. There was no difference in prognosis between smokers and nonsmokers, regardless of whether they had smoked in the past.
Partial Lesions of the Intratemporal Segment of the Facial Nerve: Graft versus Partial Reconstruction
Authors: Bento Ricardo F. , Salomone Raquel , Brito Rubens , Tsuji Robinson K. , Hausen Mariana 
Published: October 2014

Objectives: In cases of partial lesions of the intratemporal segment of the facial nerve, should the surgeon perform an intraoperative partial reconstruction, or partially remove the injured segment and place a graft? We present results from partial lesion reconstruction on the intratemporal segment of the facial nerve. Methods: A retrospective study on 42 patients who presented partial lesions on the intratemporal segment of the facial nerve was performed between 1988 and 2005. The patients were divided into 3 groups based on the procedure used: Interposition of the partial graft on the injured area of the nerve (group 1; 12 patients); keeping the preserved part and performing tubulization (group 2; 8 patients); and dividing the parts of the injured nerve (proximal and distal) and placing a total graft of the sural nerve (group 3; 22 patients). Results: Fracture of the temporal bone was the most frequent cause of the lesion in all groups, followed by iatrogenic causes (p < 0.005). Those who obtained results lower than or equal to III on the House-Brackmann scale were 1 (8.3%) of the patients in group 1, none (0.0%) of the patients in group 2, and 15 (68.2%) of the patients in group 3 (p < 0.001). Conclusions: The best surgical technique for therapy of a partial lesion of the facial nerve is still questionable. Among these 42 patients, the best results were those from the total graft of the facial nerve.
Digastric Muscle Sew-up Procedure for the Repair of the Floor of the Mouth following Pull-through Operation for Oral Cancers
Authors: Suzuki Hideaki , Matsuura Kazuto , Hiraki Nobuaki , Kadokawa Yohei , Hashida Koichi , Udaka Tsuyoshi , Nagatani Gunji 
Published: October 2014

Objectives: We report the digastric muscle sew-up procedure for the repair of the floor of the mouth following the pull-through operation for advanced oral cancers. Methods: Eleven patients with advanced oral cancers (of the tongue in 8 cases and of the floor of the mouth in 3 cases) were retrospectively analyzed. One-third glossectomy and hemiglossectomy were performed in 4 patients each; the other 3 patients underwent tumor resection on the floor of the mouth. After neck dissection and tumor resection via the pull-through approach, the floor of the mouth was repaired simply by sewing the digastric muscle to the mandibular base. The surfaces of the transected musculature of the tongue and the floor of the mouth were left uncovered and exposed to the oral cavity. Results: The postoperative wound healing was fairly good in all of the patients. Neck infection or the formation of a fistula on the floor of the mouth was not seen. The patients started transoral ingestion by the 10th postoperative day. Temporary difficulty in swallowing occurred in all patients, but was totally alleviated within 1 month. Their clarity of speech recovered to a tolerable level. Conclusions: We believe that the digastric muscle sew-up procedure is a simple, safe, and timesaving method for the repair of small to medium-sized defects of the floor of the mouth created by ablative surgery in patients with advanced oral cancers.
Retrograde Labeling of the Rat Facial Nerve with Carbocyanine Dyes to Enhance Intraoperative Identification
Authors: Dogru Salim , Van Daele Douglas , Hansen Marlan R. 
Published: October 2014

Objectives: Removal of head and neck neoplasms, especially those of the parotid gland and those of the internal auditory canal and cerebellopontine angle, often requires microdissection of the facial nerve. Displacement or splaying of the nerve can make it difficult to identify facial nerve fibers and/or distinguish them from surrounding tissues. Here we tested a method of labeling the facial nerve with fluorescent lipophilic dyes as a method of providing intraoperative visual confirmation of nerve fibers. Methods: The facial nerves of adult rats were retrogradely labeled with 1,1′-dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate (DiI), 3,3′-dioctadecyloxacarbocyanine perchlorate (DiO), or 3,3′-dilinoleyloxacarbocyanine perchlorate (Fast DiO) either by direct application to the nerve sheath or by microinjection into the facial muscles. The nerves were examined 30 days after dye application by means of a dissecting stereomicroscope equipped with epifluorescence filters. Results: Of the dyes tested, Fast DiO proved to be the most effective, providing labeling of the nerve sufficient to be seen with combined fluorescent and bright field stereomicroscopy. Nerve conduction studies indicated that fluorescent labeling did not adversely affect nerve function. Conclusions: These results raise the possibility of using fluorescent lipophilic dyes to label nerves as a method of enhancing identification and distinguishing nerve fibers during surgery.
Morphometric Study on the Anatomy of the Fetal Cricoid Cartilage and Comparison between its Inner Diameter and Endotracheal Tube Sizes
Authors: Lima Leila F. R. , Nita Luciana M. , Campelo Victor E. S. , Imamura Rui , Tsuji Domingos H. 
Published: October 2014

Objectives: The high incidence of respiratory disorders is one of the main problems in perinatal medical care. With the increased use of intubation, the incidence of laryngeal injury causing stenosis has also increased. The principal constriction point in the infant's larynx is the midcricoid area. We sought to provide detailed morphometric data on the anatomy of the cricoid cartilage and its relationship with growth and body characteristics of fetuses at 5 to 9 months of gestational age. Methods: Nineteen larynges obtained from 17 stillborn infants and 2 newborn infants ranging in gestational age from 5 to 9 months were studied. Measurements of the cricoid cartilage were made with a millimeter-graded caliper. Results: Weight was the variable most correlated with cricoid measurements. The cricoid lumen configuration showed an almost elliptic shape and did not change with gestational age. The mean inner subglottic cricoid area was 19.27 ± 9.62 mm2 and was related to weight and body surface area. Cricoid growth was more pronounced at the outer portion of the cartilage. Conclusions: The cricoid lumen configuration was elliptic, and its mean area was smaller than that of available endotracheal tubes. This lumen area was most influenced by weight and height.
Unique Transgenic Animal Model for Hereditary Hearing Loss
Authors: Cosetti Maura , Culang David , Kotla Sumankrishna , O'Brien Peter , Eberl Daniel F. , Hannan Frances 
Published: October 2014

Objectives: This study capitalizes on the unique molecular and developmental similarities between the auditory organs of Drosophila and mammals, to investigate genes implicated in human syndromic and nonsyndromic hearing loss in a genetically tractable experimental animal model, the fruit fly Drosophila. Methods: The Drosophila counterparts of 3 human deafness genes (DIAPH1/DFNA1, ESPN/DFNB36, and TMHS/DFNB67) were identified by sequence similarity. An electrophysiological assay was used to record sound-evoked potentials in response to an acoustic stimulus, the Drosophila courtship song. Results: Flies with mutations affecting the diaphanous, forked, and CG12026/TMHS genes displayed significant reductions in the amplitude of sound-evoked potentials compared to wild-type flies (p < 0.05 to p < 0.005). The mean responses were reduced from approximately 500 to 600 μV in wild-type flies to approximately 100 to 300 μV in most mutant flies. Conclusions: The identification of significant auditory dysfunction in Drosophila orthologs of human deafness genes will facilitate exploration of the molecular biochemistry of auditory mechanosensation. This may eventually allow for novel diagnostic and therapeutic approaches to human hereditary hearing loss.
Postoperative Monitoring of Esophageal Pressure in Patients with Obstructive Sleep Apnea-Hypopnea Syndrome Who Have Undergone Tonsillectomy with Uvulopalatopharyngoplasty
Authors: Suzuki Masaaki , Saigusa Hanako , Kurogi Ryoko , Morita Shigeho , Ishizuka Yoichi 
Published: October 2014

Objectives: To realize better postoperative management in patients with obstructive sleep apnea-hypopnea syndrome (OSAHS), we elucidated the need for the postoperative monitoring of esophageal pressure (Pes). Methods: A prospective randomized controlled study was performed. Adult patients with OSAHS were divided into 2 groups: Those administered autoadjusted continuous positive airway pressure (CPAP) before, on, and after the first postoperative night (CPAP group) and those not administered CPAP before or after the surgery (non-CPAP group). Tonsillectomy with uvulopalatopharyngoplasty (UPPP) under general anesthesia was performed on all of the patients. On the first postoperative night, continuous overnight monitoring of Pes and oxygen saturation level was carried out simultaneously with oxygen supplementation in both groups in the patient's room in the general ward. Results: The CPAP group showed a significantly improved mean inspiratory maximal end-apneic Pes swing on the first postoperative night as compared with the non-CPAP group, although there was no significant difference in oxygen desaturation index on the first postoperative night between the 2 groups. Conclusions: Continuous Pes monitoring and CPAP administration were beneficial in the detection and minimization of respiratory disturbances in patients with OSAHS who underwent tonsillectomy with UPPP under general anesthesia.
Vocal Fold Paralysis in Infants with Tracheoesophageal Fistula
Authors: Oestreicher-Kedem Yael , DeRowe Ari , Nagar Hagit , Fishman Gad , Ben-Ari Josef 
Published: October 2014

Objectives: We describe the clinical characteristics and management of vocal fold paralysis in infants who were born with a tracheoesophageal fistula (TEF). Methods: This retrospective case series included all infants born with TEFs who presented to our pediatric otolaryngology unit and intensive care unit because of dyspnea or aphonia in the years 2005 and 2006, and who were found to have vocal fold paralysis. Results: Five boys and 1 girl were studied. One infant had stridor before TEF repair, and 5 after it. All children underwent flexible laryngotracheobronchoscopy and were treated in the pediatric intensive care unit before diagnosis of the vocal fold paralysis (5 bilaterally and 1 unilaterally) was made. The ages at diagnosis of paralysis ranged between 14 days and 14 months. Five infants required tracheostomy. Conclusions: Vocal fold paresis in infants is difficult to diagnose. The risk for recurrent laryngeal nerve injury associated with TEF and TEF repair should be emphasized in these children. We recommend that all newborns with TEF should be examined by an otolaryngologist before operation to confirm the mobility of the vocal folds and to rule out other associated airway malformations, and examined after operation if respiratory difficulties develop.