• 한국임상수의학회지
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• 제14권1호
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• pp.48-55
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• 1997

This study eas conducted to assess the spectrographic analysis agter vocal cordectomy in which procedures included biopsy punch per os, laryngofissure and lactic acid injection to the vocal cord. There were significant difference in dominant frequency(DF) of spectrograms between normal and all surgical procedures for vocal cordectomy at 1 day (p<0.01). Vocal cordectomy(laryngofissure) revealed significant differences in minimum frequency of call (MIFC) and DF during the period of observation after surgery (p<0.01). In lactic acid injextion group, there were also significant differences in DF and maximum frequency of call (MAFC) variables (p<0.01).

• 대한기관식도과학회지
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• 제17권1호
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• pp.53-56
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• 2011

Vocal cord paralysis (VCP) is a common complication after thyroidectomy despite the continuity of the recurrent laryngeal nerve (RLN) is preserved. Much efforts have been made into preventing VCP, but few of them focuses on the treatment strategies and prognosis after VCP take place. In this case, patient visited the clinic for papillary thyroid cancer in Rt. thyroid gland without VCP. She underwent total thyroidectomy with central neck dissection. During dissection, Rt main mass was encircling Rt. RLN. To make matters worse, Lt. RLN was severed due to tight attachment with Berry's ligament. After that, intratumoural dissection of Rt. RLN and end to end anastomosis of Lt. RLN were performed with microscopy to preserve the functions of RLNs as much as possible, otherwise permanent bilateral VCPs were inevitable. We report this case, since both vocal cords recovered from VCPs with symmetric, synchronous movements at postoperative follow up.

• 한국통신학회논문지
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• 제37A권9호
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• pp.792-798
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• 2012

네트워크 지수가 중요한 현대 사회에서 음성을 통한 전달력 극대화로 대화 상대자로 하여금 호감도를 최대한 끌어 올리는 것이 중요한 사안이 되었다. 이때 공기 중에 포함된 습도는 음성의 전달력에 많은 영향을 미친다. 따라서 본 논문에서는 30%, 50%, 80%의 습도를 일정하게 유지한 환경에서 성대에 미치는 영향을 분석하기 위한 음성신호 분석 기술을 적용한 실험을 수행하여 습도가 음성의 전달력에 미치는 영향을 정량적으로 규명해 보고자 한다. 이를 위해 20대 남성 20명을 대상으로 30%, 50%, 80% 습도 환경을 유지하고 있는 공간에서 1시간동안 노출된 상태에서 음성을 수집하고 성대 진동 변화 및 음성 에너지 크기를 측정한 실험을 수행하였다. 최종적으로 습도 변화에 따른 성대 기능의 특징 요소를 측정하고 통계 분석을 통해 추출된 실험 결과가 통계적 유의성을 갖는지에 대해 분석해 보고자 한다.

• 대한기관식도과학회지
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• 제7권2호
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• pp.105-111
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• 2001

• 대한음성언어의학회:학술대회논문집
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• 대한음성언어의학회 2001년도 제14회 학술대회
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• pp.67-69
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• 2001

• 대한음성언어의학회:학술대회논문집
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• 대한음성언어의학회 2001년도 제14회 학술대회
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• pp.77-79
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• 2001

• 대한후두음성언어의학회지
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• 제21권1호
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• pp.27-31
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• 2010

Mild vocal fold hypomobility is a common finding of which clinical significance is incompletely understood. Recently, electrophysiologic investigations have shown that vocal fold hypomobility is a continuum of neurogenic dysfunction ; partial denervation (paresis), complete denervation (paralysis), and variable degrees and patterns of reinnervation. Despite a sound pathophysiological basis for its existence, interest in and acceptance of the diagnosis of vocal fold paresis is relatively recent. Vocal fold paresis may be a relatively common and often overlooked condition that can be difficult to diagnose since laryngoscopy does not reliably distinguish innocent laryngeal asymmetry from hypomobility caused by paresis. Although not entirely free from error, laryngeal electromyography seems to hold more promise as a means of reliable diagnosis than laryngoscopy, and should be employed systematically in the evaluation of suspected paresis. The means to help most patients with paresis already exists in the repertoire of interventions developed to treat paralysis. However, since the vocal fold retains substantial movement, more conservative treatment strategy is recommended as a first line of treatment. The authors reviewed the representative reports of vocal fold paresis and summarized the controversies and consensus regarding the vocal fold paresis.

• 대한의용생체공학회:의공학회지
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• 제25권5호
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• pp.343-349
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• 2004

전기성문전도는 발성시에 성문의 진동이 전기적 임피던스를 이용하여 검출되는 신호이다. 본 연구는 이러한 전기성문전도를 기록하기 위한 장비를 구현하고 음성분석 및 후두질환 진단에 대한 적용생을 평가하고자 하였다. 전기성문전도의 하드웨어는 2 쌍의 링전극, 동조증폭기, 검파기, 저역통과필터, 자동이득조절부 등으로 구성되며, 2.7MHz의 반송파 신호를 이용하고 진폭 변조 방식의 검파를 통해 임피던스 신호를 추출하도록 하였다. 추출된 신호는 PC 사운드 카드의 라인 입력을 통해 샘플링되고 양자화되었다. 검출 신호를 분석하기 위한 파라미터는 패래 시간을(CQ), 개폐 속도율(SQ), 개폐속도지수(SI), 성대진동 주파수(F0), 성대진동 주파수변동지수(Jitter), 성대진동 진폭변동지수(Shimmer) 등을 추출하였다. 전기성문전도를 분석한 결과, F0가 증가할수록 CQ는 커지고, SQ와 SI는 작아지는 경향을 보였으며, 전기성문전도와 음성 선호의 기본주파수가 일치함을 알 수 있었다. CQ, SQ, SI는 정상인과 후두암 환자를 비교한 결과 유의한 차이를 보였다. 이러한 결과는 성대의 운동을 관찰할 수 있는 휴대용 전기성문전도 계측기의 구현이 가능하게 하였고, 성대 기능 이상 검사가 가능함을 시사하였다.

• 한국임상수의학회지
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• 제15권1호
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• pp.124-130
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• 1998

This study was performed to evaluate the new surgical technique for debarking. Of the 8 mongrel dogs which underwent devocalization, 4 heads (group 1) received complete surgical removal of the vocal cords and another 4 heads (group 2) received fixation of vocal cords and vocal processes onto the thyroid cartilage. Volume of each dogs' voices was measured by a sound level meter(Function A) over 7 months at intervals of 10 days. All experimental animals'hematological values were measured before operation and postoperative at 2i 5 and 10 days. The changes of volume of dogs'voices and hematological values were analyzed by paired t-test. The volume in the dogs'voices in each group after operation was significantly lower than that before operation. At this results we detected that devocalizing effect was the same in each group. Postoperative volume of dogs'voices in group 1 had a tendency to increaser but group 2 had a tendency to decrease. The number of erythrocytes at 2 days after operation was significantly fewer than those before operation in group 1, but the group 2 did not have significant changes. The number of leukocytes at 2 days after operation significantly increased from those before operation in group 11 but the group 2 did not have significant changes. It was concluded that the new surgical technique, fixation of vocal cords and vocal processes onto the thyroid cartilages could be available for the devocalization of dogs and for the prevention of postoperative inflammation and blood loss.

• 대한후두음성언어의학회지
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• 제5권1호
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• pp.69-74
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• 1994

Thyroplasty type III provides an effective mean of shortening the vocal fold. It is used primarily fer lowering vocal pitch. The indications for this surgery are the male patients with too high a vocal pitch of long duration which has proven resistant to voice therapy and a type of dysphonia characterized by high pitch and a breathy voice, in which the laryngeal findings include a very narrow glottal chink and a small amplitude of vibration, suggesting a stiff vocal cord. In this study, we have experienced two cases of high pitched voice, one is mutational falsetto and other is high pitched, breathy voice with stiff vocal fold. The results were satisfactorily successful with type III thyroplasty. So we report the cases of type III thyroplasty in patients of dysphonia with high pitched voice.