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Artificial larynx

Mariko Ogino, Yuma Ebihara, Akihiro Homma, Kimitaka Tanaka, Yoshitsugu Nakanishi, Toshimichi Asano, Takehiro Noji, Yo Kurashima, Soichi Murakami, Toru Nakamura, Takahiro Tsuchikawa, Keisuke Okamura, Toshiaki Shichinohe, Satoshi Hirano
PURPOSE: Pharyngo-laryngo-oesophagectomy (PLE) which is mainly indicated for cervical oesophageal cancer or synchronous double cancer of the thoracic oesophagus and the pharynx or larynx, is extremely invasive. Since minimally invasive oesophagectomy (MIE) using video-assisted thoracic surgery has become popular recently, the procedure can be adopted to PLE. Moreover, the use of the prone position (PP) in MIEs has been increasing recently because technical advantages and fewer post-operative complications were reported...
March 23, 2018: Journal of Minimal Access Surgery
Farzaneh Ahmadi, Farzad Noorian, Daniel Novakovic, André van Schaik
Despite emergent progress in many fields of bionics, a functional Bionic Voice prosthesis for laryngectomy patients (larynx amputees) has not yet been achieved, leading to a lifetime of vocal disability for these patients. This study introduces a novel framework of Pneumatic Bionic Voice Prostheses as an electronic adaptation of the Pneumatic Artificial Larynx (PAL) device. The PAL is a non-invasive mechanical voice source, driven exclusively by respiration with an exceptionally high voice quality, comparable to the existing gold standard of Tracheoesophageal (TE) voice prosthesis...
2018: PloS One
M S Banus, M A Birchall, J A Graveston
OBJECTIVE: This prospective cohort study investigates the prediction of a voluntary cough using surface electromyography (EMG) of intercostal and diaphragm muscles, to develop control algorithms for an EMG-controlled artificial larynx. SETTING: The Ear Institute, London. MAIN OUTCOME MEASURES: Electromyography onset compared to voluntary cough exhalation onset and to 100 ms (to give the artificial larynx the time to close the bioengineered vocal cords) before voluntary cough exhalation onset, in twelve healthy participants...
April 2018: Clinical Otolaryngology
Bruno Sodre, Marcelo Rosa, Ana Dassie-Leite
Nineteen acoustical measurements were related to 23 larynx conditions by artificial neural networks (ANNs) and principal component analysis. An exhaustive analysis (combining all possible sets of acoustical measurements as ANN inputs) showed a performance of 99.4% for accuracy and 90.3% for sensitivity and specificity in classifying voice signals into normal and non-normal larynx conditions. In the case of individual larynx condition identification, the general sensitivity drop significantly (6.4%), although some conditions were better identified (including "vocal nodules" and "cysts") then others, reaching 99...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Angela M Dietsch, Christopher B Rowley, Nancy Pearl Solomon, William G Pearson
Purpose: Artificial airway procedures such as intubation and tracheotomy are common in the treatment of traumatic injuries, and bolus modifications may be implemented to help manage swallowing disorders. This study assessed artificial airway status, bolus properties (volume and viscosity), and the occurrence of laryngeal penetration and/or aspiration in relation to mechanical features of swallowing. Method: Coordinates of anatomical landmarks were extracted at minimum and maximum hyolaryngeal excursion from 228 videofluoroscopic swallowing studies representing 69 traumatically injured U...
September 18, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
Mitsuhiro Kamimura, Nobuhisa Kameyama, Chie Homma, Tatsuya Ibe, Shinjiro Takeoka, Atsuto Mouri, Yoichiro Hamamoto
BACKGROUND: Expectoration of sputum can be difficult for patients with respiratory conditions such as chronic obstructive pulmonary disease, chronic bronchitis, or bronchiectasis because of the effects of decreased pulmonary function, respiratory muscle fatigue, altered sputum properties, and impaired ciliary function. We developed a new method for the vibratory stimulation of the cervical trachea and this study aimed to compare it with the Acapella (a current oscillation device) method...
July 2017: Respiratory Investigation
Christian Debry, N Engin Vrana, Agnès Dupret-Bories
No abstract text is available yet for this article.
April 6, 2017: New England Journal of Medicine
Thibaut Raguin, Agnès Dupret-Bories, Christian Debry
Research has been fighting against organ failure and shortage of donations by supplying artificial organs for many years. With the raise of new technologies, tissue engineering and regenerative medicine, many organs can benefit of an artificial equivalent: thanks to retinal implants some blind people can visualize stimuli, an artificial heart can be proposed in case of cardiac failure while awaiting for a heart transplant, artificial larynx enables laryngectomy patients to an almost normal life, while the diabetic can get a glycemic self-regulation controlled by smartphones with an artificial device...
January 2017: Médecine Sciences: M/S
Christian Debry, N Engin Vrana, Agnès Dupret-Bories
No abstract text is available yet for this article.
January 5, 2017: New England Journal of Medicine
Camila Cristina Ishikawa, Thais Gonçalves Pinheiro, Adriana Hachiya, Arlindo Neto Montagnoli, Domingos Hiroshi Tsuji
OBJECTIVES: The aim of this study was to evaluate the effects of cricothyroid muscle contraction on vocal fold vibration, as evaluated with high-speed videoendoscopy, and to identify one or more aspects of vocal fold vibration that could be used as an irrefutable indicator of unilateral cricothyroid muscle paralysis. STUDY DESIGN: This was an experimental study employing excised human larynges. METHODS: Twenty freshly excised human larynges were evaluated during artificially produced vibration...
May 2017: Journal of Voice: Official Journal of the Voice Foundation
Jia-Shiou Liao
Purpose: This study investigated the acoustic properties of 6 Taiwan Southern Min vowels produced by 10 laryngeal speakers (LA), 10 speakers with a pneumatic artificial larynx (PA), and 8 esophageal speakers (ES). Method: Each of the 6 monophthongs of Taiwan Southern Min (/i, e, a, ɔ, u, ə/) was represented by a Taiwan Southern Min character and appeared randomly on a list 3 times (6 Taiwan Southern Min characters × 3 repetitions = 18 tokens). Each Taiwan Southern Min character in this study has the same syllable structure, /V/, and all were read with tone 1 (high and level)...
November 1, 2016: American Journal of Speech-language Pathology
Sirida Pittyanont, Phudit Jatavan, Songkiat Suwansirikul, Theera Tongsong
A fetal sonographic screening examination performed at 23 weeks showed polyhydramnios, micrognathia, fixed postures of all long bones, but no movement and no breathing. The fetus showed fetal heart rate acceleration but no movement when acoustic stimulation was applied with artificial larynx. All these findings persisted on serial examinations. The neonate was stillborn at 37 weeks and a final diagnosis of Pena-Shokeir sequence was made. In addition to typical sonographic features of Pena-Shokeir sequence, fetal heart rate accelerations with no movement in response to acoustic stimulation suggests that peripheral myopathy may possibly play an important role in the pathogenesis of the disease...
September 2016: Journal of Clinical Ultrasound: JCU
Marco Guzman, Gonzalo Miranda, Christian Olavarria, Sofia Madrid, Daniel Muñoz, Miguel Leiva, Lorena Lopez, Cori Bortnem
PURPOSE: The present study aimed to observe the effect of two types of tubes on vocal tract bidimensional and tridimensional images. METHODS: Ten participants with hyperfunctional dysphonia were included. Computerized tomography was performed during production of sustained [a:], followed by sustained phonation into a drinking straw, and then repetition of sustained [a:]. A similar procedure was performed with a stirring straw after 15 minutes of vocal rest. Anatomic distances and area measures were obtained from computerized tomography midsagittal and transversal images...
January 2017: Journal of Voice: Official Journal of the Voice Foundation
Tomohito Fujioka, Kousuke Nakano, Satoshi Maniwa
Artificial respiration by tracheostomy is necessary for long-term survival in spinal muscular atrophy (SMA) Type I patients. There are two types of tracheostomy: i )simple tracheostomy and ii) tracheostomy plus aspiration prevention surgery, including laryngotracheal separation. We experienced three cases of SMA type I patients that had good outcomes after undergoing laryngotracheal separation. The patients' ages at onset were 14 days, two months and one and a half months. Laryngotracheal separation was performed at five months, seven months, and 15 years and five months respectively, and the times from diagnosis to surgery were a month, three months and 15 years...
September 2015: No to Hattatsu. Brain and Development
Reidar Grénman, Petri Koivunen, Heikki Minn
The risk of developing laryngeal cancer increases after 50 years of age. Of the risk factors, smoking has decreased significantly, but alcohol consumption has increased. The significance of HPV infection is lower compared with oropharyngeal cancer. Early laryngeal cancer can be successfully treated with surgery or radiation therapy. For cancers that have spread further (T3 and T4), a combination of surgery and radiotherapy or a combination of radiotherapy and cytostatic chemotherapy are used. By using a voice prosthesis, most patients are able to achieve a fairly good speech quality after laryngectomy...
2015: Duodecim; Lääketieteellinen Aikakauskirja
Vincent Carrière, Danny Cantin, Stéphanie Nault, Charlène Nadeau, Nathalie Samson, Jennifer Beck, Jean-Paul Praud
OBJECTIVE: We previously reported the development of an active inspiratory laryngeal narrowing against ventilator insufflations when inspiratory pressure is increased during nasal pressure support ventilation in lambs. The present study aimed to further understand the factors involved in this inspiratory laryngeal narrowing. More specifically, we tested the hypothesis that a short inspiratory pressure rise time or a low PaCO2 level promotes inspiratory laryngeal narrowing observed in nasal pressure support ventilation...
August 2015: Critical Care Medicine
Kyle Iverson, Ramon Riojas, Danny Sharon, Andrew B Hall
This manuscript aims to determine if there is a difference in performance outcomes after initial training with either animals or simulators. Volunteers without prior experience performing emergency procedures were randomly assigned to receive training in cricothyroidotomy on either a pig model or on an artificial simulator. Volunteers were given identical lectures and trained to proficiency. Two weeks after training, trainees were tested using human cadavers as to their performance with time, incision size, incision start location, initial placement attempt, and final accuracy...
May 2015: American Surgeon
Elisabeth Rieger, Agnès Dupret-Bories, Laetitia Salou, Marie-Helene Metz-Boutigue, Pierre Layrolle, Christian Debry, Philippe Lavalle, Nihal Engin Vrana
Porous titanium implants are widely employed in the orthopaedics field to ensure good bone fixation. Recently, the use of porous titanium implants has also been investigated in artificial larynx development in a clinical setting. Such uses necessitate a better understanding of the interaction of soft tissues with porous titanium structures. Moreover, surface treatments of titanium have been generally evaluated in planar structures, while the porous titanium implants have complex 3 dimensional (3D) architectures...
June 7, 2015: Nanoscale
Dominik Roth, Christina Hafner, Werner Aufmesser, Kurt Hudabiunigg, Christian Wutti, Harald Herkner, Wolfgang Schreiber
BACKGROUND: Ventilation is still one key element of advanced life support. Emergency medical technicians (EMTs) without training in advanced airway management usually use bag valve mask ventilation (BVM). Bag valve mask ventilation requires proper training and yet may be difficult and ineffective. Supraglottic airway devices, such as the laryngeal tube (LT), have been proposed as alternatives. Safety and feasibility are unclear if used by EMTs with limited training only. We compared efficacy of the LT to BVM for out-of-hospital cardiac arrest in a primarily volunteer-based emergency medical services...
August 2015: American Journal of Emergency Medicine
Jian Wang, Wuyi Li, Jianhan Liu, Chunxiao Xu, Dahai Yang, Hong Huo, Xu Tian, Zhuhua Zhang, Yu Chen
OBJECTIVE: To explore the methods and results of surgical management for refractory dysphagia and aspiration. METHODS: The clinical data of 24 refractory dysphagia and aspiration patients who accepted surgical management were retrospectively analysed. RESULTS: Twenty-four refractory dysphagia and aspiration patients accepted 26 operations between 2001 and 2014. Of the 26 operations, 17 were cricopharyngeal myectomy (CPM), 6 were scarectomy, 3 were laryngeal-tracheal separation...
February 2015: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
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