The Experts below are selected from a list of 207 Experts worldwide ranked by ideXlab platform
Mamoru Suzuki - One of the best experts on this subject based on the ideXlab platform.
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Three-dimensional laryngeal model for planning of laryngeal framework surgery
Acta Oto-laryngologica, 2020Co-Authors: Hiroyuki Hiramatsu, Ryoji Tokashiki, Hiroya Yamaguchi, Mamoru SuzukiAbstract:Conclusion. The three-dimensional prototype model was useful for planning of laryngeal framework surgery. Objective: To discuss the usefulness of a three-dimensional laryngeal model for laryngeal framework surgery. Materials and methods. A three-dimensional laryngeal model was created based on the postoperative helical computed tomography (CT) data of the larynx (case 1) which underwent Lateral Cricoarytenoid Muscle (LCA) pull surgery. LCA pull surgery is a kind of arytenoid adduction for uniLateral vocal cord paralysis. A three-dimensional model of case 1 larynx was prototyped using a selective laser sintering method. In case 1, the patient's voice did not improve after LCA pull surgery. The three-dimensional model revealed that the original surgical procedure was not appropriate to obtain optimal arytenoid adduction. According to the analysis of this three-dimensional model, we changed the surgical approach and performed this new refined LCA pull surgery on another patient with uniLateral vocal cord par...
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combination of direct pull of Lateral Cricoarytenoid Muscle and thyroplasty type i for severe uniLateral vocal cord paralysis
Nippon Jibiinkoka Gakkai Kaiho, 2006Co-Authors: Hidenori Kanebayashi, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:外側輪状披裂筋牽引術(Lateral Cricoarytenoid Muscle pull:以下LCA-Pull)と甲状軟骨形成術I型(以下I型)を併用した片側性喉頭麻痺5症例についてその効果を検討した.当科では2000年より片側性喉頭麻痺に対しLCA-Pullを行ってきたが,当初はその効果を判断するために高度嗄声例に対してもあえて単独で対応してきた.その結果は最長発声持続時間(MPT)10秒以上を「改善」としたところ75%の改善率であったが,改善例の中にも聴覚印象的には不満足な症例があった.この結果をふまえ我々は2004年6月以降,高度嗄声を呈した症例に対してはLCA-PullとI型とを併用する方針とした.2004年10月から2005年3月までの6ヵ月間に両術式を併用した症例は5例で,4例は一期的に両術式を行い,残り1例は2004年10月以前にLCA-Pullを施行し,上記期間内にI型を追加した.これら5症例に対しMPT,発声時平均呼気流率(MFR),GRBASを用いた聴覚印象による評価を行い,全例正常音声と判断できるレベルまで改善した.LCA-PullとI型の併用は甲状軟骨板を経由した同一術野での手術であり,両術式を併用する必要のある高度嗄声症例に対し有用である.
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direct pull of Lateral Cricoarytenoid Muscle for uniLateral vocal cord paralysis
Acta Oto-laryngologica, 2005Co-Authors: Ryoji Tokashiki, Hiroyuki Hiramatsu, Hiroya Yamaguchi, Rei Motohashi, Kiyoaki Tsukahara, Mamoru SuzukiAbstract:Conclusion. Lateral Cricoarytenoid Muscle-pull surgery (LCA pull) is a safe and effective method for the treatment of uniLateral vocal cord paralysis. Objective. To evaluate the results of an improved method of LCA pull for uniLateral vocal cord paralysis. Material and methods. Thirteen patients with uniLateral vocal cord paralysis underwent LCA pull between April 2003 and January 2004. A small window was made in the posterior lower part of the thyroid cartilage and 2–3 mm in a cranial direction to the lower edge of the thyroid cartilage. The inner perichondrium was carefully removed to expose the LCA Muscle. A 4-0 nylon suture placed through the LCA Muscle was pulled to adduct the arytenoid and was tied to the anterior lower part of the thyroid cartilage. All cases were treated by LCA pull alone. In all cases, the maximum phonation time was measured and an auditory evaluation was performed using the grade, roughness, breathiness, asthenia and strain scale. The airflow rate was measured in five cases. Res...
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a case of high pitched diplophonia that resolved after a direct pull of the Lateral Cricoarytenoid Muscle
Acta Oto-laryngologica, 2005Co-Authors: Kiyoaki Tsukahara, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:Various approaches have been employed for the surgical treatment of uniLateral vocal cord paralysis. Recently, we performed a direct pull of the Lateral Cricoarytenoid Muscle in a case of high-pitched diplophonia with little difference between the right and left vocal cord levels and obtained favorable results. The patient was a 66-year-old male who consulted our hospital with chief complaints of husky voice and abnormal sensation in the pharyngolaryngeal region. Cerebellum/brainstem inflammation was diagnosed in February 2002 and appropriate treatment was instituted. Despite an improvement in the patient's systemic condition, right vocal cord paralysis remained. Although there were no abnormalities in the vocal range for ordinary speech, diplophonia was noted at high pitches, and synchronization could not be observed using stroboscopy. Therefore, the patient was operated on in October 2002. The high-pitched diplophonia disappeared and stroboscopy revealed favorable mucosal waves at high pitches. Thus, di...
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a direct pull of the Lateral Cricoarytenoid Muscle for treatment of uniLateral laryngeal paralysis
Nihon Kikan Shokudoka Gakkai Kaiho, 2005Co-Authors: Kiyoaki Tsukahara, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:一側喉頭麻痺に対しては様々な外科的治療が行われている。われわれは一側喉頭麻痺症例に対して外側輪状披裂筋牽引術を行い良好な結果を得たので報告する。対象は2002年10月から2003年9月の間に東京医科大学耳鼻咽喉科にて一側喉頭麻痺と診断され, 外側輪状披裂筋牽引術を行った7症例 (男性5例, 女性2例) で, 術前, 術後の最長発声持続時間および聴覚印象的評価の比較検討を行った。全例でMPTは改善し, 聴覚印象的には7例中4例が術後G(0) に, 1例がG(1) へと改善した。外側輪状披裂筋牽引術は一側喉頭麻痺の外科的治療として有用であると思われた。
Wang Wenhui - One of the best experts on this subject based on the ideXlab platform.
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experimental study of the neurophysiology of the Lateral Cricoarytenoid Muscle a fter nervous reinnervation on the vocal cord paralysis in dogs
Chinese Archives of Otolaryngology-head and Neck Surgery, 2005Co-Authors: Wang WenhuiAbstract:OBJECTIVE To study the electro-neurogram of the Lateral cricoaryten oid(LCA)Muscle after nervous reinnervation on the vocal cord paralysis in dogs . METHODS The recurrent laryngeal nerve(RLN)of the left side was totally cut ,three months later,the adducent branch of the RLN was anastomosed with the bran ch of the cervical ansa . Six months after the reinnervation , the electro-neuro gram was examined to detect the function of the LCA. RESULTS Six months after t he operation,the nervous latency of LCA was 1.60 ± 0.05 ms,this showed no diffe rence with that of the normal LCA,but the nervous conduction speed of LCA was sl ower than that of the normal LCA. CONCLUSION The nervous reinnervation after t hree months of the vocal cord paralysis can recover the basic function of the la ryngeal Muscle,but it still needs time to reach the total normal function .
Ryoji Tokashiki - One of the best experts on this subject based on the ideXlab platform.
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Three-dimensional laryngeal model for planning of laryngeal framework surgery
Acta Oto-laryngologica, 2020Co-Authors: Hiroyuki Hiramatsu, Ryoji Tokashiki, Hiroya Yamaguchi, Mamoru SuzukiAbstract:Conclusion. The three-dimensional prototype model was useful for planning of laryngeal framework surgery. Objective: To discuss the usefulness of a three-dimensional laryngeal model for laryngeal framework surgery. Materials and methods. A three-dimensional laryngeal model was created based on the postoperative helical computed tomography (CT) data of the larynx (case 1) which underwent Lateral Cricoarytenoid Muscle (LCA) pull surgery. LCA pull surgery is a kind of arytenoid adduction for uniLateral vocal cord paralysis. A three-dimensional model of case 1 larynx was prototyped using a selective laser sintering method. In case 1, the patient's voice did not improve after LCA pull surgery. The three-dimensional model revealed that the original surgical procedure was not appropriate to obtain optimal arytenoid adduction. According to the analysis of this three-dimensional model, we changed the surgical approach and performed this new refined LCA pull surgery on another patient with uniLateral vocal cord par...
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combination of direct pull of Lateral Cricoarytenoid Muscle and thyroplasty type i for severe uniLateral vocal cord paralysis
Nippon Jibiinkoka Gakkai Kaiho, 2006Co-Authors: Hidenori Kanebayashi, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:外側輪状披裂筋牽引術(Lateral Cricoarytenoid Muscle pull:以下LCA-Pull)と甲状軟骨形成術I型(以下I型)を併用した片側性喉頭麻痺5症例についてその効果を検討した.当科では2000年より片側性喉頭麻痺に対しLCA-Pullを行ってきたが,当初はその効果を判断するために高度嗄声例に対してもあえて単独で対応してきた.その結果は最長発声持続時間(MPT)10秒以上を「改善」としたところ75%の改善率であったが,改善例の中にも聴覚印象的には不満足な症例があった.この結果をふまえ我々は2004年6月以降,高度嗄声を呈した症例に対してはLCA-PullとI型とを併用する方針とした.2004年10月から2005年3月までの6ヵ月間に両術式を併用した症例は5例で,4例は一期的に両術式を行い,残り1例は2004年10月以前にLCA-Pullを施行し,上記期間内にI型を追加した.これら5症例に対しMPT,発声時平均呼気流率(MFR),GRBASを用いた聴覚印象による評価を行い,全例正常音声と判断できるレベルまで改善した.LCA-PullとI型の併用は甲状軟骨板を経由した同一術野での手術であり,両術式を併用する必要のある高度嗄声症例に対し有用である.
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direct pull of Lateral Cricoarytenoid Muscle for uniLateral vocal cord paralysis
Acta Oto-laryngologica, 2005Co-Authors: Ryoji Tokashiki, Hiroyuki Hiramatsu, Hiroya Yamaguchi, Rei Motohashi, Kiyoaki Tsukahara, Mamoru SuzukiAbstract:Conclusion. Lateral Cricoarytenoid Muscle-pull surgery (LCA pull) is a safe and effective method for the treatment of uniLateral vocal cord paralysis. Objective. To evaluate the results of an improved method of LCA pull for uniLateral vocal cord paralysis. Material and methods. Thirteen patients with uniLateral vocal cord paralysis underwent LCA pull between April 2003 and January 2004. A small window was made in the posterior lower part of the thyroid cartilage and 2–3 mm in a cranial direction to the lower edge of the thyroid cartilage. The inner perichondrium was carefully removed to expose the LCA Muscle. A 4-0 nylon suture placed through the LCA Muscle was pulled to adduct the arytenoid and was tied to the anterior lower part of the thyroid cartilage. All cases were treated by LCA pull alone. In all cases, the maximum phonation time was measured and an auditory evaluation was performed using the grade, roughness, breathiness, asthenia and strain scale. The airflow rate was measured in five cases. Res...
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a case of high pitched diplophonia that resolved after a direct pull of the Lateral Cricoarytenoid Muscle
Acta Oto-laryngologica, 2005Co-Authors: Kiyoaki Tsukahara, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:Various approaches have been employed for the surgical treatment of uniLateral vocal cord paralysis. Recently, we performed a direct pull of the Lateral Cricoarytenoid Muscle in a case of high-pitched diplophonia with little difference between the right and left vocal cord levels and obtained favorable results. The patient was a 66-year-old male who consulted our hospital with chief complaints of husky voice and abnormal sensation in the pharyngolaryngeal region. Cerebellum/brainstem inflammation was diagnosed in February 2002 and appropriate treatment was instituted. Despite an improvement in the patient's systemic condition, right vocal cord paralysis remained. Although there were no abnormalities in the vocal range for ordinary speech, diplophonia was noted at high pitches, and synchronization could not be observed using stroboscopy. Therefore, the patient was operated on in October 2002. The high-pitched diplophonia disappeared and stroboscopy revealed favorable mucosal waves at high pitches. Thus, di...
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a direct pull of the Lateral Cricoarytenoid Muscle for treatment of uniLateral laryngeal paralysis
Nihon Kikan Shokudoka Gakkai Kaiho, 2005Co-Authors: Kiyoaki Tsukahara, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:一側喉頭麻痺に対しては様々な外科的治療が行われている。われわれは一側喉頭麻痺症例に対して外側輪状披裂筋牽引術を行い良好な結果を得たので報告する。対象は2002年10月から2003年9月の間に東京医科大学耳鼻咽喉科にて一側喉頭麻痺と診断され, 外側輪状披裂筋牽引術を行った7症例 (男性5例, 女性2例) で, 術前, 術後の最長発声持続時間および聴覚印象的評価の比較検討を行った。全例でMPTは改善し, 聴覚印象的には7例中4例が術後G(0) に, 1例がG(1) へと改善した。外側輪状披裂筋牽引術は一側喉頭麻痺の外科的治療として有用であると思われた。
Hiroyuki Hiramatsu - One of the best experts on this subject based on the ideXlab platform.
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Three-dimensional laryngeal model for planning of laryngeal framework surgery
Acta Oto-laryngologica, 2020Co-Authors: Hiroyuki Hiramatsu, Ryoji Tokashiki, Hiroya Yamaguchi, Mamoru SuzukiAbstract:Conclusion. The three-dimensional prototype model was useful for planning of laryngeal framework surgery. Objective: To discuss the usefulness of a three-dimensional laryngeal model for laryngeal framework surgery. Materials and methods. A three-dimensional laryngeal model was created based on the postoperative helical computed tomography (CT) data of the larynx (case 1) which underwent Lateral Cricoarytenoid Muscle (LCA) pull surgery. LCA pull surgery is a kind of arytenoid adduction for uniLateral vocal cord paralysis. A three-dimensional model of case 1 larynx was prototyped using a selective laser sintering method. In case 1, the patient's voice did not improve after LCA pull surgery. The three-dimensional model revealed that the original surgical procedure was not appropriate to obtain optimal arytenoid adduction. According to the analysis of this three-dimensional model, we changed the surgical approach and performed this new refined LCA pull surgery on another patient with uniLateral vocal cord par...
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combination of direct pull of Lateral Cricoarytenoid Muscle and thyroplasty type i for severe uniLateral vocal cord paralysis
Nippon Jibiinkoka Gakkai Kaiho, 2006Co-Authors: Hidenori Kanebayashi, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:外側輪状披裂筋牽引術(Lateral Cricoarytenoid Muscle pull:以下LCA-Pull)と甲状軟骨形成術I型(以下I型)を併用した片側性喉頭麻痺5症例についてその効果を検討した.当科では2000年より片側性喉頭麻痺に対しLCA-Pullを行ってきたが,当初はその効果を判断するために高度嗄声例に対してもあえて単独で対応してきた.その結果は最長発声持続時間(MPT)10秒以上を「改善」としたところ75%の改善率であったが,改善例の中にも聴覚印象的には不満足な症例があった.この結果をふまえ我々は2004年6月以降,高度嗄声を呈した症例に対してはLCA-PullとI型とを併用する方針とした.2004年10月から2005年3月までの6ヵ月間に両術式を併用した症例は5例で,4例は一期的に両術式を行い,残り1例は2004年10月以前にLCA-Pullを施行し,上記期間内にI型を追加した.これら5症例に対しMPT,発声時平均呼気流率(MFR),GRBASを用いた聴覚印象による評価を行い,全例正常音声と判断できるレベルまで改善した.LCA-PullとI型の併用は甲状軟骨板を経由した同一術野での手術であり,両術式を併用する必要のある高度嗄声症例に対し有用である.
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direct pull of Lateral Cricoarytenoid Muscle for uniLateral vocal cord paralysis
Acta Oto-laryngologica, 2005Co-Authors: Ryoji Tokashiki, Hiroyuki Hiramatsu, Hiroya Yamaguchi, Rei Motohashi, Kiyoaki Tsukahara, Mamoru SuzukiAbstract:Conclusion. Lateral Cricoarytenoid Muscle-pull surgery (LCA pull) is a safe and effective method for the treatment of uniLateral vocal cord paralysis. Objective. To evaluate the results of an improved method of LCA pull for uniLateral vocal cord paralysis. Material and methods. Thirteen patients with uniLateral vocal cord paralysis underwent LCA pull between April 2003 and January 2004. A small window was made in the posterior lower part of the thyroid cartilage and 2–3 mm in a cranial direction to the lower edge of the thyroid cartilage. The inner perichondrium was carefully removed to expose the LCA Muscle. A 4-0 nylon suture placed through the LCA Muscle was pulled to adduct the arytenoid and was tied to the anterior lower part of the thyroid cartilage. All cases were treated by LCA pull alone. In all cases, the maximum phonation time was measured and an auditory evaluation was performed using the grade, roughness, breathiness, asthenia and strain scale. The airflow rate was measured in five cases. Res...
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a case of high pitched diplophonia that resolved after a direct pull of the Lateral Cricoarytenoid Muscle
Acta Oto-laryngologica, 2005Co-Authors: Kiyoaki Tsukahara, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:Various approaches have been employed for the surgical treatment of uniLateral vocal cord paralysis. Recently, we performed a direct pull of the Lateral Cricoarytenoid Muscle in a case of high-pitched diplophonia with little difference between the right and left vocal cord levels and obtained favorable results. The patient was a 66-year-old male who consulted our hospital with chief complaints of husky voice and abnormal sensation in the pharyngolaryngeal region. Cerebellum/brainstem inflammation was diagnosed in February 2002 and appropriate treatment was instituted. Despite an improvement in the patient's systemic condition, right vocal cord paralysis remained. Although there were no abnormalities in the vocal range for ordinary speech, diplophonia was noted at high pitches, and synchronization could not be observed using stroboscopy. Therefore, the patient was operated on in October 2002. The high-pitched diplophonia disappeared and stroboscopy revealed favorable mucosal waves at high pitches. Thus, di...
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a direct pull of the Lateral Cricoarytenoid Muscle for treatment of uniLateral laryngeal paralysis
Nihon Kikan Shokudoka Gakkai Kaiho, 2005Co-Authors: Kiyoaki Tsukahara, Ryoji Tokashiki, Hiroyuki Hiramatsu, Mamoru SuzukiAbstract:一側喉頭麻痺に対しては様々な外科的治療が行われている。われわれは一側喉頭麻痺症例に対して外側輪状披裂筋牽引術を行い良好な結果を得たので報告する。対象は2002年10月から2003年9月の間に東京医科大学耳鼻咽喉科にて一側喉頭麻痺と診断され, 外側輪状披裂筋牽引術を行った7症例 (男性5例, 女性2例) で, 術前, 術後の最長発声持続時間および聴覚印象的評価の比較検討を行った。全例でMPTは改善し, 聴覚印象的には7例中4例が術後G(0) に, 1例がG(1) へと改善した。外側輪状披裂筋牽引術は一側喉頭麻痺の外科的治療として有用であると思われた。
Allen D Hillel - One of the best experts on this subject based on the ideXlab platform.
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Electromyographic findings in recurrent laryngeal nerve reinnervation.
Annals of Otology Rhinology and Laryngology, 2020Co-Authors: Nicole Maronian, Lawrence R Robinson, Patricia Waugh, Allen D HillelAbstract:Abductor, adductor, and combined reinnervation procedures have been explored with variable success rates. We describe the experience of a tertiary care center with adductor reinnervation procedures, including preoperative and postoperative videostroboscopy and electromyography (EMG) findings. A retrospective chart review was performed from 1997 to 2001 that included 9 patients. Preoperative and postoperative voice comparison was performed by 3 blinded speech pathologists. Clinical comparisons of videostroboscopy findings for vocal fold bulk, tone, position, presence of gap, and movement are elucidated. The preoperative and postoperative EMG findings are described. In all patients, preoperative EMG revealed a dense, complete denervation of the affected recurrent laryngeal nerve. No movement was noted on videostroboscopy with persistent glottic gap. Reinnervation involved a nerveMuscle pedicle or a direct neurorrhaphy of the ansa cervicalis to the recurrent laryngeal nerve. Voice improvement was noted between 60 days and 3 months after reinnervation. Four postoperative EMG studies were performed. An early postoperative EMG study at 5 months revealed activation of the Lateral Cricoarytenoid Muscle and thyroarytenoid Muscle with head-lift. Videostroboscopy showed excellent near-midline static positioning of the vocal fold. Late EMG studies, performed 12 to 16 months after reinnervation, revealed learning of these Muscles, with new activation on eee phonation. We conclude that recurrent laryngeal nerve reinnervation procedures belong in the armamentarium of the laryngologist for the treatment of vocal fold paralysis. The EMG findings reported in this study suggest that ongoing reinnervation allows for activation with phonation in matured neuronal anastomoses. Overall, this procedure results in excellent patient acceptance and near-normal vocal quality.
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Findings of multiple Muscle involvement in a study of 214 patients with laryngeal dystonia using fine-wire electromyography.
Annals of Otology Rhinology and Laryngology, 2020Co-Authors: Darrell A. Klotz, Nicole Maronian, Lawrence R Robinson, Patricia Waugh, Ariana Shahinfar, Allen D HillelAbstract:Although perceptual and stroboscopic data help in diagnosing and classifying laryngeal dystonia, these measures do not aid the voice clinician in targeting which specific Muscles to treat with botulinum toxin. Most patients achieve smoother, less effortful voicing with standard injection regimens. However, there is a notable failure rate. We performed fine-wire electromyography on 214 consecutive patients with laryngeal dystonia. We correlated voice ratings, stroboscopy data, and fine-wire electromyography data. Videostroboscopy was successful in visually demonstrating most of the audible findings in isolated vocal tremor, but it was much less successful in identifying breaks alone or a combination of breaks and tremor. Fine-wire electromyography revealed that the thyroarytenoid Muscle was significantly more likely than the Lateral Cricoarytenoid Muscle to be the predominant Muscle associated with adductor spasmodic dysphonia, and that the thyroarytenoid and Lateral Cricoarytenoid Muscles were equally likely to be predominantly involved in tremor spasmodic dysphonia. In addition, several patients in both the adductor spasmodic dysphonia and the tremor spasmodic dysphonia groups presented with interarytenoid Muscle predominance. All of the intrinsic laryngeal Muscles are capable of being the predominant Muscle in laryngeal dystonia, and there are patterns of Muscle abnormalities that differ between adductor spasmodic dysphonia and tremor spasmodic dysphonia. Some of the failures in treating adductor spasmodic dysphonia with botulinum toxin, and the greater difficulty with success in treating patients with tremor spasmodic dysphonia, are due to failure to deliver toxin to the appropriate Muscles.
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tremor laryngeal dystonia treatment of the Lateral Cricoarytenoid Muscle
Annals of Otology Rhinology and Laryngology, 2004Co-Authors: Nicole Maronian, Lawrence R Robinson, Patricia Waugh, Allen D HillelAbstract:Tremor laryngeal dystonia is a clinical entity distinct from adductor laryngeal dystonia, according to perceptual, stroboscopic, and fine-wire electromyographic findings. Treatment with botulinum toxin has proven more difficult for tremor laryngeal dystonia than for adductor laryngeal dystonia, yet no treatment variations have been considered that might produce improved clinical results. We present 81 patients with a clinical presentation of tremor laryngeal dystonia who were treated with a variety of approaches with botulinum toxin. On the basis of both fine-wire electromyographic findings and clinical response, currently 44 of those patients are being followed up after at least 3 injections. Twenty-one patients (48%) are maintained on Lateral Cricoarytenoid injections, and 23 (52%) are maintained on thyroarytenoid Muscle injections. The electromyographic findings of this group are presented along with their clinical outcome. According to our findings, the majority of patients with tremor laryngeal dystonia can be successfully treated with botulinum toxin if the practitioner includes injections to the Lateral Cricoarytenoid Muscle as a treatment option.
