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| Name | Class |
|---|---|
| Josip Juraj Strossmayer University of Osijek | OTHER |
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The treatment of advanced laryngeal cancer involves the removal of the entire larynx. After removal of the larynx, the pharyngoesophageal segment (PES) is created by reconstructing the soft tissue of the pharynx and oesophagus, and its vibration creates a substitute voice. High-speed video endoscopy (HSV) is the only method that visualises and measures the vibration of the PES after a laryngectomy. The acoustic characteristics of three forms of rehabilitated voice of laryngectomised individuals (oesophageal voice, tracheoesophageal (TE) voice using a voice prosthesis and electrolarynx) have been satisfactorily described, but the interdependence of acoustic and visual representations of the phonatory movement of the PES is still insufficiently studied. In recent years, biomechanical models have been developed to analyse the vibration of the PES, but consistent results have not yet been obtained that would explain whether the parameters from the analysis of the waveform of the PES can be compared with the parameters obtained from the acoustic analysis of the voice of a laryngectomised patient.Effective rehabilitation focuses on optimising speech and swallowing, which leads to a good integration of the laryngectomised person into society. One step towards achieving this goal is a thorough assessment of their voice and communication experiences, as well as analysing the phonatory movements of the PES using HSV technology.
The first aim of this study is to describe phonatory movement of pharyngoesophageal segment (PES) in laryngectomy patients with HSV and then with biomechanical model. Analyse these recordings and examine the impact of loss of voice in terms of psychological and socioeconomic problems in laryngectomy patients using Croatian version of the Self-Evaluation of Communication Experiences after Laryngectomy (SECEL:HR) questionnaire.
This is a non-interventional, prospective study of laryngectomised participants ( 55 participants) who completed oncological treatment and underwent voice rehabilitation. A consent form will be signed.
Exclusion criteria included individuals with acute upper or lower respiratory tract infections, a second primary cancer in the upper aerodigestive tract or lungs, and individuals with neurological or psychiatric disorders.
Each participant underwent a complete otolaryngological examination. The video recordings of the PES were made with a 90° rigid HSV system Wolf 5562 Hres ENDOCAM (frame rate: 4000 fps, resolution: 256×256 pixels). All subjects phonated the vowel "a" at a comfortable pitch and volume. Visual assessment of the HSV recordings was performed including the assessments of the overall quality of the recordings and the assessments of anatomical and morphological features of the PES: amount of saliva, visibility and shape of the PES, location of visible vibration, presence of a mucosal wave and regularity of the vibration.
Each respondent completed the Croatian version of the Self-Evaluation of Communication Experiences after Laryngectomy (SECEL:HR) questionnaire, specifically designed to address the communication needs of patients who have undergone a laryngectomy. The first part of SECEL:HR examines patient-relevant data, while the second part consists of 35 items designed as questions or statements to explore communication experiences. Patients rate the frequency of these communication difficulties on a Likert scale (0-never, 1-sometimes, 2-often, 3-always). The 35 items are divided into 3 subscales: General (0-15 points), Environment (0-42 points) and Attitude (0-45 points). Item number 35 is a separate question: "Do you talk the same amount now as you did before your laryngectomy?" and is scored with the rating categories "yes"," "more" and "less". The total numerical score ranges from 0 to 102, with a higher score indicating greater difficulty and poorer postoperative adaptation of speech communication.
The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise < 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). The following parameters were recorded from the central part of the best recording: fundamental frequency (F0) (Hz), jitter (%), shimmer (%) and the intensity of substitute voice (dB). The value of the maximal phonation time (MPT; ms) was taken as the value of the longest possible relaxed phonation of the vowel "a".
A multi-mass coupled biomechanical model was developed as a multidimensional time sequence of PES mucosal contractions in the form of the opening width observed for each frame of the video time sequence at different angles.
The biomechanical model of the PES analyses non-stationary pharyngoesophageal vibrations and draws conclusions about the temporal characteristics of tissue stiffness, oscillatory mass, pressure and geometric distributions within the PES. The biomechanical model identifies mathematical dependencies and analyses extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). Using the PES waveform, we were able to calculate cycle duration, open and closed phase duration (%), fundamental frequency (Hz), mean shimmer (dB), relative shimmer (%), mean jitter (s) and relative jitter (%).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Adult laryngectomised patients | Patients who have undergone total laryngectomy and completed minimal their 6-month period without disease after surgery and post-operative treatments such as radiotherapy or chemotherapy |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| High-speed video endoscopy (HSV) | Device | Describe anatomical and morphological characteristics o phonatory movement of pharyngoesophageal segment (PES) in laryngectomy patients |
|
| Measure | Description | Time Frame |
|---|---|---|
| High Speed Video Endoscopy Recordings | Visual recording of the mucosa of the pharyngoesophageal segment (PES) performed with High speed video endoscopy (HSV) during the phonation of the vowel "a".The video recordings of the PES were made with a 90° rigid HSV system Wolf 5562 Hres ENDOCAM (frame rate: 4000 fps, resolution: 256×256 pixels). All subjects phonated the vowel "a" at a comfortable pitch and volume. Visual assessment of the HSV recordings was performed using the protocol including the assessments of the overall quality of the recordings (assessability, brightness and focus) and the assessments of anatomical and morphological features of the PES: amount of saliva, visibility and shape of the PES, location of visible vibration, presence of a mucosal wave and regularity of the vibration. | 15 minutes for each participants |
| The Measures of Central Tendency and Dispersion in Acoustic Signal - Fundamental Frequency | The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise < 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). The fundamental frequency (Hz) parameter was recorded from the central part of the best recording | 15 minutes |
| The Measures of Central Tendency and Dispersion in Acoustic Signal - Intensity of Substitute Voice | The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise < 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). Intensity of substitute voice was recorded from the central part of the best recording | 15 minutes |
| The Measures of Central Tendency and Dispersion in Acoustic Signal - Relative Jitter and Shimmer |
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Inclusion Criteria:
Exclusion Criteria:
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adult male laryngectomised patients who completed oncological treatment and underwent voice rehabilitation
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| Name | Affiliation | Role |
|---|---|---|
| Ana Đanić Hadžibegović, Assoc. Prof | Clinical Hospital Centre Zagreb | Study Chair |
| Andrijana Včeva, Full Prof | University Hospital Osijek | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University Hospital Osijek | Osijek | 31000 | Croatia |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 30409318 | Background | Zenga J, Goldsmith T, Bunting G, Deschler DG. State of the art: Rehabilitation of speech and swallowing after total laryngectomy. Oral Oncol. 2018 Nov;86:38-47. doi: 10.1016/j.oraloncology.2018.08.023. Epub 2018 Sep 12. | |
| 10448737 | Background | van As CJ, Tigges M, Wittenberg T, Op de Coul BM, Eysholdt U, Hilgers FJ. High-speed digital imaging of neoglottic vibration after total laryngectomy. Arch Otolaryngol Head Neck Surg. 1999 Aug;125(8):891-7. doi: 10.1001/archotol.125.8.891. |
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| ID | Title | Description |
|---|---|---|
| FG000 | Adult Laryngectomised Patients | Patients who have undergone total laryngectomy and completed minimal their 6-month period without disease after surgery and post-operative treatments such as radiotherapy or chemotherapy |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
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| ID | Title | Description |
|---|---|---|
| BG000 | Adult Laryngectomised Patients | Patients who have undergone total laryngectomy and completed minimal their 6-month period without disease after surgery and post-operative treatments such as radiotherapy or chemotherapy |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Median |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | High Speed Video Endoscopy Recordings | Visual recording of the mucosa of the pharyngoesophageal segment (PES) performed with High speed video endoscopy (HSV) during the phonation of the vowel "a".The video recordings of the PES were made with a 90° rigid HSV system Wolf 5562 Hres ENDOCAM (frame rate: 4000 fps, resolution: 256×256 pixels). All subjects phonated the vowel "a" at a comfortable pitch and volume. Visual assessment of the HSV recordings was performed using the protocol including the assessments of the overall quality of the recordings (assessability, brightness and focus) and the assessments of anatomical and morphological features of the PES: amount of saliva, visibility and shape of the PES, location of visible vibration, presence of a mucosal wave and regularity of the vibration. | Posted | Count of Participants | Participants | 15 minutes for each participants |
|
50 minutes
Aim of this study is to describe phonatory movement of pharyngoesophageal segment in laryngectomy patients with HSV and then with biomechanical model, analyse these recordings and examine relationship between the obtained parameters and the parameters obtained using the acoustic analysis of the voice of a laryngectomized person.
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Adult Laryngectomised Patients | Patients who have undergone total laryngectomy and completed minimal their 6-month period without disease after surgery and post-operative treatments such as radiotherapy or chemotherapy High - speed video endoscopy (HSV): Describe anatomical and morphological characteristics o phonatory movement of Pharyngoesophageal segment (PES) in laryngectomy patients Acoustic voice analysis: acoustic program (lingWAVES - Voice and speech analyser) - measuring the values of acoustic parameters in voice recordings Quality of life questionnaire: Filling out questionnaires |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Željka Laksar Klarić | University hospital Osijek | +38531512402 | zeljka.l.klaric@gmail.com |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot_SAP | Yes | Yes | No | Study Protocol and Statistical Analysis Plan | Aug 1, 2022 | Apr 25, 2025 | Prot_SAP_000.pdf |
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| ID | Term |
|---|---|
| D007822 | Laryngeal Neoplasms |
| D013060 | Speech |
| ID | Term |
|---|---|
| D010039 | Otorhinolaryngologic Neoplasms |
| D006258 | Head and Neck Neoplasms |
| D009371 | Neoplasms by Site |
| D009369 | Neoplasms |
Not provided
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Not provided
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Not provided
| Acoustic voice analysis | Device | acoustic program (lingWAVES - Voice and speech analyser) - measuring the values of acoustic parameters in voice recordings |
|
| Quality of life questionnaire | Behavioral | Filling out questionnaires |
|
The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise < 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). The following parameters were recorded from the central part of the best recording: jitter (%), shimmer (%) |
| 15 minutes |
| The Measures of Central Tendency and Dispersion of Maximum Phonation Time (MPT) | Measurement of the longest possible relaxed phonation of the voice "a" by a speech therapist The maximum phonation time (measured in seconds) for which a person can sustain a vowel sound when produced on 1 deep breath at a comfortable pitch and loudness and is a common clinical measure of glottal efficiency. | 2 minutes |
| Croatian Version of the SECEL (SECEL:HR) Questionnaire. | Completing the Croatian version of the Self-Evaluation of Communication Experiences after Laryngectomy (SECEL) questionnaire. Questionnaire consists of two parts. The first part examines the relevant general data on the person filling out the questionnaire, while the second part consists of 35 items questionably or statement-designed to examine communication experiences. Patients estimates the incidence of these communication difficulties on the Likert scale (0-never, 1-sometimes, 2-often, 3-always). The 35 items are divided into 3 subscales: General (0-15 points), Environment (0-42 points) and Attitude (0-45 points). Item number 35 is a separate question: "Do you talk the same amount now as you did before your laryngectomy?" and is scored with the rating categories "yes"," "more" and "less". The total numerical score ranges from 0 to 102, with a higher score indicating greater difficulty and poorer postoperative adaptation of speech communication. | 15 minutes |
| The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion - Open and Closed Phase Duration (%), Relative Shimmer and Relative Jitter | The development of the biomechanical model of the PES aims to quantify non-stationary pharyngoesophageal vibrations and draw conclusions about the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identifies mathematical dependencies and analyses extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allows calculation of relative shimmer (%), relative jitter (%), and the duration of the open and closed phases (%), or the percentage of open or closed time of the PES, which is calculated from the PES waveform using the formulas listed in reference 5. | 3 months |
| The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion - Mean Shimmer | The development of the biomechanical model of the PES in order to quantify non-stationary pharyngoesophageal vibrations and drawing conclusions on the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identify mathematical dependencies and analyse extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allowed us to calculate mean shimmer (dB). | 3 months |
| The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion of Mean Jitter | The development of the biomechanical model of the PES in order to quantify non-stationary pharyngoesophageal vibrations and drawing conclusions on the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identify mathematical dependencies and analyse extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allowed us to calculate mean jitter (s). | 3 months |
| The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion - Fundamental Frequency | The development of the biomechanical model of the PES in order to quantify non-stationary pharyngoesophageal vibrations and drawing conclusions on the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identify mathematical dependencies and analyse extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allowed us to calculate the fundamental frequency (Hz). | 3 months |
| 21558056 | Background | Schwarz R, Huttner B, Dollinger M, Luegmair G, Eysholdt U, Schuster M, Lohscheller J, Gurlek E. Substitute voice production: quantification of PE segment vibrations using a biomechanical model. IEEE Trans Biomed Eng. 2011 Oct;58(10):2767-76. doi: 10.1109/TBME.2011.2151860. Epub 2011 May 10. |
| 24861998 | Background | Huttner B, Luegmair G, Patel RR, Ziethe A, Eysholdt U, Bohr C, Sebova I, Semmler M, Dollinger M. Development of a time-dependent numerical model for the assessment of non-stationary pharyngoesophageal tissue vibrations after total laryngectomy. Biomech Model Mechanobiol. 2015 Jan;14(1):169-84. doi: 10.1007/s10237-014-0597-1. Epub 2014 May 27. |
| 29861291 | Background | Schlegel P, Stingl M, Kunduk M, Kniesburges S, Bohr C, Dollinger M. Dependencies and Ill-designed Parameters Within High-speed Videoendoscopy and Acoustic Signal Analysis. J Voice. 2019 Sep;33(5):811.e1-811.e12. doi: 10.1016/j.jvoice.2018.04.011. Epub 2018 May 31. |
| 23169480 | Background | Schindler A, Mozzanica F, Brignoli F, Maruzzi P, Evitts P, Ottaviani F. Reliability and validity of the Italian self-evaluation of communication experiences after laryngeal cancer questionnaire. Head Neck. 2013 Nov;35(11):1606-15. doi: 10.1002/hed.23198. Epub 2012 Nov 20. |
| 8182320 | Background | Debruyne F, Delaere P, Wouters J, Uwents P. Acoustic analysis of tracheo-oesophageal versus oesophageal speech. J Laryngol Otol. 1994 Apr;108(4):325-8. doi: 10.1017/s0022215100126660. |
| 21298450 | Background | Dooks P, McQuestion M, Goldstein D, Molassiotis A. Experiences of patients with laryngectomies as they reintegrate into their community. Support Care Cancer. 2012 Mar;20(3):489-98. doi: 10.1007/s00520-011-1101-4. Epub 2011 Feb 6. |
| years |
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| Sex: Female, Male | Count of Participants | Participants |
|
| Race (NIH/OMB) | Count of Participants | Participants |
|
| Region of Enrollment | Number | participants |
|
| Time of speech therapy (months) | Median | Inter-Quartile Range | months |
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| Myotomy of the cricopharyngeal muscle | Count of Participants | Participants |
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| Type of operation | Count of Participants | Participants |
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| Radiotherapy | Count of Participants | Participants |
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| Chemotherapy | Count of Participants | Participants |
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| Education completed | Count of Participants | Participants |
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| Occupational status | Count of Participants | Participants |
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| Marital status | Count of Participants | Participants |
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| Smoking habits | Count of Participants | Participants |
|
Patients who have undergone total laryngectomy and completed minimal their 6-month period without disease after surgery and post-operative treatments such as radiotherapy or chemotherapy
High - speed video endoscopy (HSV): Describe anatomical and morphological characteristics o phonatory movement of pharyngoesophageal segment (PES) in laryngectomy patients
|
|
| Primary | The Measures of Central Tendency and Dispersion in Acoustic Signal - Fundamental Frequency | The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise < 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). The fundamental frequency (Hz) parameter was recorded from the central part of the best recording | Posted | Median | Inter-Quartile Range | Hertz (Hz) | 15 minutes |
|
|
|
| Primary | The Measures of Central Tendency and Dispersion in Acoustic Signal - Intensity of Substitute Voice | The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise < 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). Intensity of substitute voice was recorded from the central part of the best recording | Posted | Median | Inter-Quartile Range | decibels (dB) | 15 minutes |
|
|
|
| Primary | The Measures of Central Tendency and Dispersion in Acoustic Signal - Relative Jitter and Shimmer | The acoustic analysis of the tracheoesophageal (TE) voice with a voice prosthesis was performed in a quiet room (ambient noise < 50 dB) with a microphone placed 30 cm from the mouth to create optimal conditions for recording and analysis. Three consecutive measurements were taken. The voice recordings were analysed using the acoustic programme lingWAVES (Voice and speech analyser version 2.x software). The following parameters were recorded from the central part of the best recording: jitter (%), shimmer (%) | Posted | Median | Inter-Quartile Range | percentage (%) | 15 minutes |
|
|
|
| Primary | The Measures of Central Tendency and Dispersion of Maximum Phonation Time (MPT) | Measurement of the longest possible relaxed phonation of the voice "a" by a speech therapist The maximum phonation time (measured in seconds) for which a person can sustain a vowel sound when produced on 1 deep breath at a comfortable pitch and loudness and is a common clinical measure of glottal efficiency. | Posted | Median | Inter-Quartile Range | mesured in seconds | 2 minutes |
|
|
|
| Primary | Croatian Version of the SECEL (SECEL:HR) Questionnaire. | Completing the Croatian version of the Self-Evaluation of Communication Experiences after Laryngectomy (SECEL) questionnaire. Questionnaire consists of two parts. The first part examines the relevant general data on the person filling out the questionnaire, while the second part consists of 35 items questionably or statement-designed to examine communication experiences. Patients estimates the incidence of these communication difficulties on the Likert scale (0-never, 1-sometimes, 2-often, 3-always). The 35 items are divided into 3 subscales: General (0-15 points), Environment (0-42 points) and Attitude (0-45 points). Item number 35 is a separate question: "Do you talk the same amount now as you did before your laryngectomy?" and is scored with the rating categories "yes"," "more" and "less". The total numerical score ranges from 0 to 102, with a higher score indicating greater difficulty and poorer postoperative adaptation of speech communication. | Posted | Median | Inter-Quartile Range | score on a scale | 15 minutes |
|
|
|
| Primary | The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion - Open and Closed Phase Duration (%), Relative Shimmer and Relative Jitter | The development of the biomechanical model of the PES aims to quantify non-stationary pharyngoesophageal vibrations and draw conclusions about the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identifies mathematical dependencies and analyses extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allows calculation of relative shimmer (%), relative jitter (%), and the duration of the open and closed phases (%), or the percentage of open or closed time of the PES, which is calculated from the PES waveform using the formulas listed in reference 5. | Posted | Median | Inter-Quartile Range | percentage (%) | 3 months |
|
|
|
| Primary | The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion - Mean Shimmer | The development of the biomechanical model of the PES in order to quantify non-stationary pharyngoesophageal vibrations and drawing conclusions on the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identify mathematical dependencies and analyse extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allowed us to calculate mean shimmer (dB). | Posted | Median | Inter-Quartile Range | decibels (dB) | 3 months |
|
|
|
| Primary | The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion of Mean Jitter | The development of the biomechanical model of the PES in order to quantify non-stationary pharyngoesophageal vibrations and drawing conclusions on the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identify mathematical dependencies and analyse extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allowed us to calculate mean jitter (s). | Posted | Median | Inter-Quartile Range | mesured in seconds | 3 months |
|
|
|
| Primary | The Results of Pharyngoesophageal Segment (PES) Vibration Analysed With the Biomechanical Model Obtained by High - Speed Video Endoscopy - Central Tendency and Dispersion - Fundamental Frequency | The development of the biomechanical model of the PES in order to quantify non-stationary pharyngoesophageal vibrations and drawing conclusions on the temporal characteristics of tissue stiffness, oscillating mass, pressure, and geometric distributions within the PES. The biomechanical model identify mathematical dependencies and analyse extracted time signals of the PES opening and contours (i.e. the opening and closing of the vibrating mucosa of the PES). The PES waveform allowed us to calculate the fundamental frequency (Hz). | Posted | Median | Inter-Quartile Range | Hertz (Hz) | 3 months |
|
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|
| 0 |
| 55 |
| 0 |
| 55 |
| 0 |
| 55 |
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| D007818 |
| Laryngeal Diseases |
| D012140 | Respiratory Tract Diseases |
| D012142 | Respiratory Tract Neoplasms |
| D010038 | Otorhinolaryngologic Diseases |
| D014705 | Verbal Behavior |
| D003142 | Communication |
| D001519 | Behavior |
|
| Relative Jitter |
|