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if phrenic nerve is damaged, can it be restored?
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if phrenic nerve is damaged, can it be restored?

My mom has a neck operation, after the operations, hoarseness in voice and coughing occured. She had an endoscopy and found out that her left phrenic nerve is paralyzed.if phrenic nerve is damaged, can it be restored? is this temporary or permanent? what shall we do to bring back her normal voice and no cough?
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The information you were given may not be correct.  The nerves to the vocal cords are the recurrent laryngeal nerves.  Injury to that nerve causes vocal cord paralysis and hoarseness.  The phrenic nerve goes to the diaphragm.  When it is damaged or cut, the diaphragm muscle becomes paralyzed and this may cause shortness of breath, but not hoarseness.

Vocal cord or vocal fold paralysis due to damage to the recurrent laryngeal nerve is often irreversible, but recent reports suggest that several different types of surgery can restore vocal cord function.  One is called a muscle-nerve-muscle technique.  A second is described below in a report from the Cleveland Clinic.  I suggest you contact these people at the Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio, USA.
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Title Ansa cervicalis-to-recurrent laryngeal nerve anastomosis for unilateral
vocal fold paralysis: experience of a single institution.
Source Annals of Otology, Rhinology & Laryngology. 117(1):40-5, 2008 Jan.
Abstract
OBJECTIVES: One treatment option for unilateral vocal fold paralysis (UVFP) is ansa cervicalis-to-recurrent laryngeal nerve (ansa-RLN) anastomosis to provide reinnervation to the affected vocal fold. The advantages of this treatment approach are that it 1) provides vocal fold tone, bulk, and tension, 2) is technically simple, and 3) does not preclude other medialization procedures. We present all patients who have undergone ansa-RLN anastomosis for UVFP at our institution.
METHODS: An Institutional Review Board-approved retrospective chart review was performed to include all patients who had undergone an ansa-RLN anastomosis procedure for UVFP at our institution. Data from clinical and endoscopic laryngoscopy with stroboscopy were recorded. Statistical analysis was performed on visual and perceptual vocal data.
RESULTS: A total of 46 patients were included in the study. Stroboscopic analysis and perceptual vocal evaluation was performed in a blinded fashion on the 21 patients who had preoperative and postoperative stroboscopy. Severity, roughness, breathiness, and strain all improved significantly over time. Glottic closure, vocal fold edge, and supraglottic effort all significantly improved after operation. Of the 38 patients with at least 3 months of follow-up, all except 1 demonstrated evidence of reinnervation.
CONCLUSIONS: This technique for treating UVFP results in significant improvements in patients' voice and on visual examination.
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