[Display of different injuries of recurrent laryngeal nerve in laryngeal electromyography].

Objective: To study the display of different types injuries of recurrent laryngeal nerve (RLN) in laryngeal electromyography (LEMG).

Methods: LEMGs of one hundred and forty-seven patients (147 sides) with traumatic unilateral vocal cord paralysis (UVCP) were studied. After LEMGs, the RLNs exploration operations were performed.

[Glottic measurement and vocal evaluation after three surgical techniques in the treatment of bilateral vocal cord paralysis].

Objective: To evaluate postoperative glottic area and vocal quality of three various surgical techniques for treating bilateral vocal cord paralysis, including laser arytenoidectomy (Group A, 24 cases), reinnervation of the posterior cricoarytenoid muscle by phrenic nerve (Group B, 9 cases) and arytenoidectomy accompanying lateral cordopexy by extralaryngeal approach (Woodman's procedure, Group C, 13 cases).

Methods: 46 cases suffered from bilateral recurrent laryngeal nerve injury were included in our study. The pre-postoperative glottic measurement and vocal acoustic parameters were analyzed.

[Diagnosis and management of sulcus vocalis].

Objective: To clarify the pathophysiology of sulcus vocalis and to develop a more rational approach to treatment.

Methods: Twenty-nine cases of sulcus vocalis patients were divided into three classification: Type I is a physiologic variant and no dysphonia (11 cases). Types II (sulcus vergeture, 13 cases) and III (sulcus vocalis, 5 cases) are characterized by severe dysphonia and loss of vibratory activity.

[Glottic measurement and vocal evaluation before and after adult arytenoidectomy].

Objective: To study minimal glottic area which can acquire sufficient airway for decannulation and maximal glottic area which can maintain preoperative vocal function on adult bilateral vocal cord paralysis with unilateral arytenoidectomy.

Methods: Sixteen adult received microscopic right arytenoidectomy with Diomed-25 laser under general anaesthesia and sustained laryngoscope from September 1998 to February 2003. The pre-postoperative glottic measurement and vocal acoustic parameters were analyzed.

[Nerve exploration and decompression for traumatic recurrent laryngeal nerve injuries induced by thyroid gland surgery].

Objective: To show the findings of recurrent laryngeal nerve injury exploration and find out therapeutic effects, indications and timing of nerve decompression for traumatic recurrent laryngeal nerve injury induced by thyroid gland surgery.

Methods: In this study there were 87 patients with recurrent laryngeal nerve injury, including 65 for nerve exploration and 22 for nonsurgical treatment. During nerve exploration, the types, severity of laryngeal nerve injuries and laryngeal muscular mass were studied.

[Comprehensive prognostic value of spontaneous and evoked electromyography in laryngeal paralysis].

Objective: To determine the comprehensive prognostic value of spontaneous and evoked electromyography (EMG) in laryngeal paralysis.

Methods: The characteristics of laryngeal EMG of 91 cases with unilateral vocal cord paralysis (VCP) after thyroid surgery were assessed. All cases were divided into four groups according to the interval of laryngeal EMG after onset, which were group one (2 months shorter, n = 13), group two (2 to 4 months, n = 23), group three (4 to 6 months, n = 36), group four (6 months longer, n = 19).

[Long-term follow-up of autogenous fat injection for unilateral vocal cord paralysis].

Objective: To study the long-term results of autogenous fat injection for unilateral vocal cord paralysis.

Methods: Twenty cases with unilateral vocal cord paralysis were treated by autogenous fat injection into the thyroarytenoid muscle to achieve medialization. The patients were divided into 3 groups by hoarse degree before operation, all of them were followed more than 12 months with serial video laryngoscope and voice evaluation.

[Prevention and therapy of cerebrospinal fluid leakage after translabyrinthine acoustic neuroma removal].

Objective: To evaluate the modified wound closure technique and other methods for preventing and treating the cerebrospinal fluid (CSF) leakage after removal of acoustic neuroma by translabyrinthine approach.

Methods: In a series of 85 cases of acoustic neuroma surgery, two kinds of technique of wound closure, the traditional (as first group) and the modified (as second group), have been subsequently used to prevent CSF leakage. The incidences of CSF leak were analyzed respectively.