The Role of Vocal Rest After Removal of Benign Lesions From Vocal Cord

Study Overview
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Brief Summary
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The accepted recommendation after removal of vocal cord lesion is voice rest.This recommendation leads to great tension among the patients, loss of working days and need to practice speech therapy.The investigators hypothesize that voice rest after surgery does not affect the quality of the patient's voice. The investigators will divide the patients into 2 groups: the first group will be instructed for a postoperative voice rest and the second group will not. Later the investigators will compare the results and conclude whether voice rest had any significance.

Detailed Description
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The prevailing view among laryngologists is that voice rest after laryngeal surgery is important to ensure a good recovery of the epithelium and lamina propria layers of the vocal cord. Speaking immediately after surgery leads to the formation of an irregular collagen in large quantities of the vocal cords - namely the creation scar tissue. The scarred vocal cords leads to a decrease in its elasticity, which is reflected in poor speech quality. Although this theory, not many works were published in the literature proving the necessity for voice rest after vocal cord surgery. Several studies have been recently published which claim that there is no need for vocal rest and stress the importance of a moderate voice effort straight after surgery. This need is based on the idea that early mobilization of tissue after surgery led to the creation of a healthy soft tissue architecture. The investigators hypothesize that there is no role for vocal rest after surgery to remove benign lesions from the vocal cords. Patients candidate for laryngeal surgery that include removal of a benign vocal cord lesion will be divided into two groups: Patients instructed for the conventional post operative voice rest, namely absolute voice rest for a week and another week of relative voice rest (speaking is allowed for 20 minutes a day). Patients instructed to speak freely without restrictions after the surgery. those are the study phases: * first visit- preoperative visit. First the investigators prove by fiber optic examination that the patient suffers from the scourge of benign vocal cord lesion. Then the patient gets an explanation of the study, fill a demographic questionnaire. Next the patient fills the VHI (voice handicap index) questionnaire - a questionnaire which assesses the impact of the patient voice by 3 measures:emotional,functional and psychosocial. The questionnaire contains 30 questions. Any question dotted between 0-4 by the patient so that a higher score means more bad sound. Optical fiber testing is performed. Vocal cords including the lesion are photographed and video files are saved . Stroboscopic test for determining the quality of vibration, movement and closure of the vocal cords.The patient voice is recorded for future determination of the GRBAS (Grade,Roughness, breathiness, asthenia,strain). this index, scored by the laryngologists assesses the patient's voice according to five factors- grade, roughness, breathiness, asthenia,strain. Each parameter dotted between 0-3 so a higher score means more bad sound.The last test is objective. The voice recording will undergo computer analysis which determine the following voice objectives : fundamental frequency, jitter, shimmer, harmonic to noise ratio. Lastly the patient is randomized (by block randomization) to determine to which group the patient belongs. Patients belonging to the control group (standard post operative voice rest) receive a form where they annotate every day whether they kept on the instructed sound regime. This log will allow the investigators to track the compliance of the patients belonging to the voice rest group. Second visit- 3 days post operative Execute an optical fiber examination for description and evaluation of the recovery process of the vocal cord. Vocal cords including the lesion will be photographed and video files are saved. stroboscopic test for future determination of the quality of vibration, movement and closure of the vocal cods. Third visit- 14 days post operative Same examination as the second visit are performed plus: - The patient voice will be recorded to determine the GRBAS Index by the laryngologist. recording of the patient's voice for an objective voice analysis evaluation using a computer. Forth visit- 1 months post operative. Same examinations as the second visit are performed. Fifth visit- 3 months post operative. Same examinations as the second visit are performed plus patient fills VHI questionnaire. Sixth visit- 6 months post operative. Same examinations as the fifth visit are performed.

Official Title
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Is Voice Rest Contributes to the Quality of Voice After Surgery to Remove Benign Vocal Cord Lesion?

Conditions
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Vocal Fold Polyp, Vocal Cord Dysfunction

Intervention / Treatment
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* Behavioral: post operative voice rest
* Behavioral: No voice rest


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient Over 18 years old suffers a benign vocal cord lesion and candidate for surgical removal . Recruitment will take place in the voice and Swallowing Clinic. Rambam medical center. Israel. Exclusion Criteria: A patient under 18. Demented patient. Deaf patient.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 99 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: The research group is the group of patients who do not keep voice rest and talk without restrictions or special instructions after surgery.
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: standard voice rest<br>This group maintains postoperative voice rest. Namely, absolute voice rest for a week, followed by a week of relative voice rest sound (talking is allowed for 20 minutes a day). post operative voice rest | Behavioral: post operative voice rest<br>* After surgery, a week of total silence. In the second week after surgery talking is allowed for 20 minutes a day.<br>|
| Experimental: no voice rest<br>This group has no limitations regarding post operative speech. Members can talk indefinitely after surgery with no special restrictions. | Behavioral: No voice rest<br>* No limitations regarding post operative speech. Members can talk indefinitely after surgery with no special restrictions<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Patient's evaluation of his own voice | VHI questionnaire score | 1 month post operative | 
| Patient's evaluation of his own voice | VHI questionnaire score | 3 months post operative | 
| Patient's evaluation of his own voice | VHI questionnaire score | 6 months post operative | 
| doctors evaluation of the patient's voice | GRABS scale score | 1 month post operative | 
| doctors evaluation of the patient's voice | GRABS scale score | 3 month post operative | 
| doctors evaluation of the patient's voice | GRABS scale score | 6 month post operative | 
| voice analysis by a software | jitter score, shrimmer score, harmonic to noise ration | 1 month post operative | 
| voice analysis by a software | jitter score, shrimmer score, harmonic to noise ration | 3 month ost operative | 
| voice analysis by a software | jitter score, shrimmer score, harmonic to noise ration | 6 month post operative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Testing the effect of various regimens voice rest on the healing process of vocal cords. the parameters the will be tested are : edema, hyperemia, epithelization, other (presence of granuloma/web) | The next parameters will be evaluated in each visit: 1. edema- scoring the edema severity .score 1= mild edema .score 2= moderate edema score 3= severe edema hyperemia- scoring the hyperemia severity .score 1= mild hyperemia .score 2= moderate hyperemia score 3= severe hyperemia epithelization degree: 1 =up to 20% 2= up to 50% 3= up to 75% 4- complete epithelization other findings: 1= granuloma 2= web. The final score of each visit includes the sum of all scores separately and will be reported as a single value. | 3 days post operative | 
| Testing the effect of various regimens voice rest on the healing process of vocal cords. the parameters the will be tested are : edema, hyperemia, epithelization, other (presence of granuloma/web) | The next parameters will be evaluated in each visit: 1. edema- scoring the edema severity .score 1= mild edema .score 2= moderate edema score 3= severe edema hyperemia- scoring the hyperemia severity .score 1= mild hyperemia .score 2= moderate hyperemia score 3= severe hyperemia epithelization degree: 1 =up to 20% 2= up to 50% 3= up to 75% 4- complete epithelization other findings: 1= granuloma 2= web. The final score of each visit includes the sum of all scores separately and will be reported as a single value. | 2 weeks post operative | 
| Testing the effect of various regimens voice rest on the healing process of vocal cords. the parameters the will be tested are : edema, hyperemia, epithelization, other (presence of granuloma/web) | The next parameters will be evaluated in each visit: 1. edema- scoring the edema severity .score 1= mild edema .score 2= moderate edema score 3= severe edema hyperemia- scoring the hyperemia severity .score 1= mild hyperemia .score 2= moderate hyperemia score 3= severe hyperemia epithelization degree: 1 =up to 20% 2= up to 50% 3= up to 75% 4- complete epithelization other findings: 1= granuloma 2= web. The final score of each visit includes the sum of all scores separately and will be reported as a single value. | 1 month post operative | 
| Testing the effect of various regimens voice rest on the healing process of vocal cords. the parameters the will be tested are : edema, hyperemia, epithelization, other (presence of granuloma/web) | The next parameters will be evaluated in each visit: 1. edema- scoring the edema severity .score 1= mild edema .score 2= moderate edema score 3= severe edema hyperemia- scoring the hyperemia severity .score 1= mild hyperemia .score 2= moderate hyperemia score 3= severe hyperemia epithelization degree: 1 =up to 20% 2= up to 50% 3= up to 75% 4- complete epithelization other findings: 1= granuloma 2= web. The final score of each visit includes the sum of all scores separately and will be reported as a single value. | 3 month post operative | 
| Testing the effect of various regimens voice rest on the healing process of vocal cords. the parameters the will be tested are : edema, hyperemia, epithelization, other (presence of granuloma/web) | The next parameters will be evaluated in each visit: 1. edema- scoring the edema severity .score 1= mild edema .score 2= moderate edema score 3= severe edema hyperemia- scoring the hyperemia severity .score 1= mild hyperemia .score 2= moderate hyperemia score 3= severe hyperemia epithelization degree: 1 =up to 20% 2= up to 50% 3= up to 75% 4- complete epithelization other findings: 1= granuloma 2= web. The final score of each visit includes the sum of all scores separately and will be reported as a single value. | 6 month post operative | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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voice rest, laryngeal surgery, glottic polyp, glottic cyst