The S/Z Ratio as an Indicator of Laryngeal Pathology

1981 ◽  
Vol 46 (2) ◽  
pp. 147-149 ◽  
Author(s):  
Frances C. Eckel ◽  
Daniel R. Boone
Keyword(s):  
Vocal Fold ◽  
Statistical Difference ◽  
Air Flow ◽  
The Other ◽  
Clinical Usefulness ◽  
Clinical Indicator ◽  
Laryngeal Pathology ◽  
Functional Dysphonia ◽  
Duration Measure ◽  
Normal Speaking

The use of the s/z ratio as a clinical indicator of laryngeal pathology was investigated with 28 dysphonic subjects with laryngeal pathology (nodules or polyps), 36 dysphonic subjects without laryngeal pathology, and 86 normal-speaking subjects. While no statistical difference was found between the three groups in their ability to sustain /s/, the subjects with laryngeal pathology had significantly lower duration times for /z/ than subjects in the other two groups. The computed s/z ratios were significantly higher for the dysphonic subjects with laryngeal pathology; subjects with functional dysphonia free of laryngeal pathology demonstrated the same s/z ratios (approximately 1.0) as the normal-speaking control subjects. The dysphonic subjects with laryngeal pathology produced s/z ratios in excess of 1.4 ninety-five percent of the time. It appeared from these data that when an additive mass developed along the glottal margin, vocal fold approximation was less efficient. This decrement in efficiency appears to result in a decrease in glottal resistance, increasing air flow, and a shortened phonatory duration time. The clinical usefulness of the s/z ratio as a duration measure for identifying voice clients who may have laryngeal lesions is considered.

The Voiced/Voiceless Phonation Time in Children With and Without Laryngeal Pathology

1992 ◽  
Vol 23 (2) ◽  
pp. 163-168 ◽  
Author(s):  
David N. Sorensen ◽  
Pamela Ann Parker
Keyword(s):  
Laryngeal Pathology ◽  
Maximum Duration ◽  
Normal Speaking

Eleven children with vocal pathology were matched to 11 normal speaking children. All subjects produced maximum duration of phonation for /s/and /z/from detailed instructions and clinician models. The s/z ratio also was calculated. Results showed no difference in /s/durations between groups, but /z/durations and s/z ratios were significantly different. The /z/durations and s/z ratio results differ from those of previous research. Possible reasons for these differences are task construction and instructional variables. Results are discussed in relationship to these variables, as well as in relationship to reduced glottal efficiency.

Markers of Wound Healing in Vocal Fold Secretions from Patients with Laryngeal Pathology

2004 ◽  
Vol 113 (1) ◽  
pp. 23-29 ◽  
Author(s):  
Ryan C. Branski ◽  
Katherine Verdolini ◽  
Clark A. Rosen ◽  
Patricia A. Hebda
Keyword(s):  
Wound Healing ◽  
Vocal Fold ◽  
Laryngeal Pathology

Videostrobolaryngoscopy of Mucus Layer during Vocal Fold Vibration in Patients with Laryngeal Tension-Fatigue Syndrome

2002 ◽  
Vol 111 (6) ◽  
pp. 537-541 ◽  
Author(s):  
Tzu-Yu Hsiao ◽  
Chia-Ming Liu ◽  
Kai-Nan Lin
Keyword(s):  
Mechanical Properties ◽  
Vocal Fold ◽  
Rough Surfaces ◽  
Voice Disorders ◽  
Vocal Folds ◽  
Voice Disorder ◽  
Mucus Layer ◽  
Vocal Fold Vibration ◽  
Fatigue Syndrome ◽  
Functional Dysphonia

The mucus layer on the vocal folds was examined by videostrobolaryngoscopy in patients with laryngeal tension-fatigue syndrome, a chronic functional dysphonia due to vocal abuse and misuse. Besides the findings in previous reports (such as abnormal glottal closure, phase or amplitude asymmetry, and the irregular mucosal wave), the vocal folds during vibration had an uneven mucus surface. The occurrence of an uneven mucus layer on vocal folds was significantly greater in subjects with this voice disorder (83% or 250 of 301 patients in this series) than in those without voice disorders (18.5% or 5 of 27). The increase of mucus viscosity, mucus aggregation, and the formation of rough surfaces on the vocal folds alter the mechanical properties that contribute to vibration of the cover of the vocal folds, and thereby worsen the symptoms of dysphonia in patients with laryngeal tension-fatigue syndrome.

scholarly journals Control Study between CT Signs and Pathological Subtypes and Differentiation Degree in Lung Adenocarcinoma

2019 ◽  
Author(s):  
Lizhen Duan ◽  
Wenli Shan ◽  
Genji Bo ◽  
Guangming Lu ◽  
Lili Guo
Keyword(s):  
Lung Adenocarcinoma ◽  
Statistical Difference ◽  
The Other ◽  
Differentiation Degree ◽  
Treatment Plans ◽  
Poorly Differentiated ◽  
Tumor Types ◽  
The Relationship ◽  
Control Study ◽  
Pathological Subtypes

Abstract Background: To study the relationship between CT signs and pathological subtypes and differentiation degree in lung adenocarcinoma.Methods: We retrospectively reviewed 394 cases’ CT images of lung adenocarcinoma and compared the diversity of images among PIL, MIA and IAC, as well as differentiation degrees of IAC by Kruskal-Wall test and X2 test.Results: There was no statistical difference of CT sign between PIL and MIA (P＞0.05). There are statistical differences among size and density of PIL, MIA and IAC (P＜0.01); the incidences of pleura traction sign, spicule sign, lobulation sign, tumor vascular sign, bronchial cut-off sign, air bronchogram sign and cavity sign in IAC were higher than the other two groups (P＜0.05); there was no statistical difference of vacuole sign among PIL, MIA and IAC (P＞0.05). There are statistical differences among size and density of three differentiated subgroups (P＜0.01); the incidences of pleura traction sign, spicule sign, tumor vascular sign, bronchial cut-off sign and cavity sign in poorly differentiated subgroup were highest (P＜0.01); the incidence of air bronchogram sign in highly differentiated subgroup was higher than moderately and poorly differentiated subgroup while incidence of lobulation sign was the lowest in three subgroups above (P＜0.05) ; there was no statistical difference of vacuole sign among three differentiated subgroups (P＞0.05).Conclusions: CT signs of lung adenocarcinoma are closely related to pathological subtypes and differentiation degrees，which would have great value to help predict tumor types and make treatment plans in clinical.

scholarly journals Impact of Turbulence Models on the Air Flow in a Confined Rectangular Space

2020 ◽  
pp. 46-53
Author(s):  
Jakub Mularski ◽  
Amit Arora ◽  
Muhammad Azam Saeed ◽  
Łukasz Niedźwiecki ◽  
Samrand Saeidi
Keyword(s):  
Experimental Data ◽  
Air Flow ◽  
Turbulence Models ◽  
The Other ◽  
Experimental Measurements ◽  
Wall Region ◽  
Sst Model ◽  
Computational Fluid Dynamics Cfd ◽  
The Impact ◽  
The Given

The paper regards the impact of four different turbulence models on the air flow pattern in a confined rectangular space. The following approaches are analyzed. The Baseline (BSL) Reynolds model, the Speziale-Sarkar-Gatzki (SSG) Reynolds model, the Menter's shear-stress transport (SST) model and the basic k-ε model. Computational fluid dynamics (CFD) results are compared with the experimental measurements in four different planes. The Reynolds number for the given conditions is equal to 5000. The k-ε model yielded the most accurate results with regard to the experimental data but its reliability decreased near the wall region. With respect to the other models, it was also found that the k-ε approach generated the least circulating flow.

EML Thoron Gas Measurements

1994 ◽  
Vol 56 (1-4) ◽  
pp. 263-266 ◽  
Author(s):  
E.O. Knutson ◽  
A.C. George ◽  
P. Shebell ◽  
C.V. Gogolak
Keyword(s):  
Indoor Air ◽  
Air Flow ◽  
The Other ◽  
Coincidence Method ◽  
Flow Paths ◽  
Filter Tube ◽  
Current Measuring ◽  
Low Levels ◽  
Gas Measurements ◽  
Indoor Air Flow

Abstract The Environmental Measurements Laboratory's experience with two methods of measuring thoron gas, and its findings on the feasibility of using these measurements to diagnose indoor air flow paths, are presented. One method is an updated version of the two-filter tube, and the other is a modified Falk-More-Nyblom delayed coincidence method. Measurements made with these instruments in six houses indicated that thoron concentrations are very low (median about 11 Bq.m-3); this is consistent with values previously reported for US housing. Both methods had difficulty measuring these low levels, particularly in houses with high radon gas levels. At one house, thoron levels measured outdoors over bare earth were higher than indoor levels. At the low levels encountered and with the current measuring technology, it seems unlikely that thoron gas measurements can be used to trace indoor air motion.

Fillers, Repairs and Repetitions in the Conversations of Saudi English Speakers: Conversational Device or Disfluency Markers

2018 ◽  
Vol 10 (6) ◽  
pp. 193
Author(s):  
Yaseen A. Azi
Keyword(s):  
Discourse Analysis ◽  
Literature Review ◽  
Nonnative Speakers ◽  
Native English Speakers ◽  
The Other ◽  
English Speakers ◽  
Other Hand ◽  
Different Levels ◽  
Normal Speaking

Based on the literature review, the three patterns (fillers, repairs and repetitions) in the conversations of the native English speakers are generally regarded as results of the normal speaking between people. On the other hand, the same patterns in the conversations of the L2 speakers are always seen as a marker of disfluency and linguistic disabilities of the nonnative speakers. Therefore, this study simply focuses on finding how the three disfluency patterns are used by the Saudi English speakers from different levels of fluency. The sampling of the study includes two groups of participants from different fluency levels. Through the transcriptions and the discourse analysis of one hour recoding of the two groups, the results showed that the three patterns (fillers, repairs and repetitions) should not be generally associated with disfluency. Instead, repetitions and self-repairs have been equally used by the two groups and such patterns can be used as a conversational device. However, the filler “uh” with longer pausing can clearly predict disfluency among the Saudi English speakers. 

scholarly journals Comparative study of the surface roughness of Ormocer-based and conventional composites

2003 ◽  
Vol 11 (4) ◽  
pp. 348-353 ◽  
Author(s):  
Leonardo Gonçalves Cunha ◽  
Roberta Caroline Bruschi Alonso ◽  
Paulo Henrique dos Santos ◽  
Mário Alexandre Coelho Sinhoreti
Keyword(s):  
Surface Roughness ◽  
Comparative Study ◽  
Statistical Difference ◽  
The Other ◽  
Initial Surface ◽  
Resin Composites ◽  
Metallic Mold ◽  
Tukey Test ◽  
Final Surface ◽  
Before And After

The aim of this study was to evaluate the surface roughness of two Ormocer-based resin composites before and after mechanical toothbrushing. The study compared the brands Admira and Definite with composites based on conventional monomer systems (Bis-GMA, Bis-EMA, UEDMA e TEGDMA), Z250 and A110. Eight samples of each material with 4mm in diameter and 2mm in height were prepared using a metallic mold. After 24 hours they were polished and examined with a profilometer for measurement of the initial surface roughness (Ra, mm) before mechanical toothbrushing (30,000 cycles). After toothbrushing, the samples were taken to the profilometer once again to check the final surface roughness. The results were submitted to ANOVA and Tukey test (5%). The Admira composite presented a higher mean of surface roughness before toothbrushing (0.132mm), with a statistical difference from the composite A110 (0.082mm). Definite (0.110mm) and Z250 (0.105mm) composites showed no differences between themselves or among the other composites. No statistical differences were observed after toothbrushing between the composites Definite (0.178mm), Z250 (0.187mm), Admira (0.181mm), and A110 (0.193mm). All composites showed a statistically significant increase in the surface roughness after toothbrushing.

Personality and Voice Disorders

2000 ◽  
Vol 43 (3) ◽  
pp. 749-768 ◽  
Author(s):  
Nelson Roy ◽  
Diane M. Bless ◽  
Dennis Heisey
Keyword(s):  
Vocal Fold ◽  
Voice Disorders ◽  
Personality Factors ◽  
Control Group ◽  
Personality Variables ◽  
Personality Differences ◽  
Functional Dysphonia ◽  
Vocal Nodules ◽  
Personality Features ◽  
And Control

To determine whether personality factors play causal, concomitant, or consequential roles in common voice disorders, a vocally normal control group and four groups with voice disorders—functional dysphonia (FD), vocal nodules (VN), spasmodic dysphonia (SD), and unilateral vocal fold paralysis (UVFP)—were compared on measures of personality and psychological adjustment. Superfactor group comparisons revealed that the majority of FD and VN subjects were classified as introverts and extraverts, respectively. Comparisons involving the SD, UVFP, and control subjects did not identify consistent personality differences. The disability hypothesis, which suggests that personality features and emotional maladjustment are solely a negative consequence of vocal disability, was not supported. Personality variables and their behavioral consequences may therefore contribute to FD and VN. Results are presented within the context of a dispositional theory offered by Roy and Bless (2000a).

Endovascular Retrograde Suction Decompression as an Adjunct to Surgical Treatment of Ophthalmic Aneurysms: Analysis of Risks and Clinical Outcomes

2009 ◽  
Vol 64 (suppl_1) ◽  
pp. ONS107-ONS112 ◽  
Author(s):  
Daniel H. Fulkerson ◽  
Terry G. Horner ◽  
Troy D. Payner ◽  
Thomas J. Leipzig ◽  
John A. Scott ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Clinical Outcomes ◽  
Statistical Difference ◽  
Internal Carotid ◽  
Balloon Occlusion ◽  
The Other ◽  
Published Data ◽  
Intraoperative Angiography ◽  
Technical Aspects ◽  
Endovascular Balloon Occlusion

Abstract Objective: Endovascular retrograde suction decompression with balloon occlusion of the internal carotid artery is a useful adjunct in the surgical treatment of ophthalmic aneurysms. This technique helps establish proximal control, facilitates intraoperative angiography and may aid dissection by evacuating blood and softening the aneurysm. Although the technical aspects of this procedure have been described, the published data on its safety are scant. This study analyzed 2 groups of patients who underwent craniotomies for treatment of ophthalmic aneurysms, comparing a group who received suction decompression with a group who did not. Methods: A retrospective analysis of prospectively collected data on 118 craniotomies for ophthalmic aneurysms performed from 1990 to 2005 is presented. A group of 63 patients treated with endovascular suction decompression during surgery is compared with 55 patients who did not undergo this technique. Results: In our overall analysis of ophthalmic aneurysms, the clinical outcome was statistically related to aneurysm size (P = 0.046). The endovascular suction decompression group in this study had overall larger aneurysms (P < 0.0001) compared with the other group. There was no statistical difference between the 2 groups in rates of complications, stroke, new visual deficit, or death. The clinical outcomes were statistically similar at discharge and at 1 year. Conclusion: Endovascular balloon occlusion and suction decompression did not increase the complication rate in a large cohort of craniotomy patients with ophthalmic aneurysms. This technique may be used to augment surgical capabilities without significantly increasing the operative risk.

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