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Early Intracordal Hyaluronic Acid Injection During Spontaneous Reinnervation for Unilateral Recurrent Laryngeal Nerve Paralysis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02163772
Recruitment Status : Completed
First Posted : June 16, 2014
Last Update Posted : June 16, 2014
National Science Council, Taiwan
Information provided by (Responsible Party):
Chang Gung Memorial Hospital

Brief Summary:
Backgrounds: Unilateral vocal cord paralysis caused from recurrent laryngeal nerve (RLN) injury is not an unusual disease and may deteriorate patients'voice and swallowing outcomes. Although the long term treatment effect is encouraged, the point when to perform surgical treatment is not conclusive. Previous reports suggested late treatment principle because patients may spontaneous reinnervation to some degree within 4-5 months after injury. The vocal cord position and tone may change during reinnervation. Others delineated laryngeal synkinesis by misdirected reinnervation is common and suggested early temporary injection laryngoplasty. They implied early injection laryngoplasty may improve patients'not only short term voice outcomes but also decrease the incidence of transcervical laryngeal framework surgery as a determined surgery. However, lacking of prospective study and objective data makes the treatment-time policy still controversial. Purposes: 1. To find incidence of spontaneous reinnervation or synkinetic regeneration. 2. To detect the relationship between changing of glottal gap and laryngeal synkinesis. 3. To detect the impaction of early intracordal hyaluronic acid injection on vocal cord position change in patients with laryngeal synkinesis. Study design: Forty patients is planned to be enrolled in the study. Twenty of them will undergo hyaluronate intracordal injection at three-six month from RLN damage. The other 20 patients will follow the watch-and wait policy. Laryngoscope, laryngeal EMG (electromyography), voice analysis and voice outcome survey will be done at 3-6 month and 12-month after RLN injury. At the end of follow up, the glottal gap, voice laboratory data and quality of life will be compared. The outcomes will also be correlated with laryngeal electromyography (LEMG) data and the impact of synkinetic reinnervation.

Condition or disease Intervention/treatment Phase
Paralysis, Unilateral, Vocal Cord Procedure: Intracordal hyaluronate injection Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 29 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Early Intracordal Hyaluronic Acid Injection During Spontaneous Reinnervation for Unilateral Recurrent Laryngeal Nerve Paralysis
Study Start Date : August 2011
Actual Primary Completion Date : July 2013

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Paralysis

Arm Intervention/treatment
Experimental: Intracordal hyaluronate injection (HI)
The intervention of Intracordal hyaluronate (Restylane) injection is given in this group No other therapies are given
Procedure: Intracordal hyaluronate injection
Other Name: Resylane

No Intervention: Conservative management (CM)
In this arm, only observation is arranged. No therapy is given.

Primary Outcome Measures :
  1. voice outcome [ Time Frame: before intervention and at 6 month follow-up ]
    VOS score: The VOS originally developed by Gliklich et al. comprises a five-item survey that evaluates the physical and social problems associated with unilateral vocal fold palsy.

Secondary Outcome Measures :
  1. laryngeal electromyography [ Time Frame: before and 6 months post intervention ]
    laryngeal electromyography signals were obtained using a concentric needle electrode with the surface-ground electrode adhered to the forehead. We examined the electromyography signals on bilateral thyroarytenoid muscle and cricothyroid muscles. With the concentric needle electrode in the thyroarytenoid muscle , the patient was asked to produce three series of "e"s at three different intensities (low, moderate and highest possible), with each "e" lasting at least 400 ms and each inter-"e" interval lasting about 200 ms. To evaluate cricothyroid function, the patients were asked to produce a glissando upward "e" at normal loudness.

  2. videolaryngostroboscopy [ Time Frame: before and 6 months post intervention ]
    An image of glottis was captured during the videolaryngoscopy examination while the patient vocalized /eee/ at modal pitch and regular loudness. The images showing the narrowest vocal slitglottal gap from several phonatory cycles were measured.

  3. laboratory voice analysis [ Time Frame: before and 6 months post intervention ]
    In a sound-insulated room, the patient read a standard passage and a sustained vowel at a conversational pitch and loudness. The patient's voice was captured using a unidirectional dynamic microphone (Shure SM48; Shure Brothers Inc., Agua Prieta, Mexico).

  4. health related quality of life (SF-36) [ Time Frame: before and 6 months post intervention ]
    The SF-36 questionnaire is designed for general health measurement of 8 domains, including physical functioning, role functioning-physical problems, bodily pain, general health, vitality, social functioning, role functioning-emotional problems, and mental health. The recall period of SF-36 is 4 weeks.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients of untreated unilateral vocal cord paralysis with a known cause of RLN injury within 3-6 month will be enrolled

Exclusion Criteria:

  • Patients proved to be not suitable for transcutaneous intracordal injection under topical anesthesia. Those who had previous phonosurgery or can't follow the observation rule will also be excluded.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02163772

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Chang Gung Memorial Hospital
Taoyuan County, Taiwan
Sponsors and Collaborators
Chang Gung Memorial Hospital
National Science Council, Taiwan
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Chang Gung Memorial Hospital Identifier: NCT02163772    
Other Study ID Numbers: NSC100-2314-B-182-021
First Posted: June 16, 2014    Key Record Dates
Last Update Posted: June 16, 2014
Last Verified: July 2013
Additional relevant MeSH terms:
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Vocal Cord Paralysis
Neurologic Manifestations
Nervous System Diseases
Laryngeal Diseases
Respiratory Tract Diseases
Otorhinolaryngologic Diseases
Vagus Nerve Diseases
Cranial Nerve Diseases