We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Mules and other equine species have been used in warfare for thousands of years to transport goods and supplies. Mules are known for ‘braying’, which is disadvantageous in warfare operations. This article explores the fascinating development of surgical techniques to stop military mules from braying, with particular emphasis on the key role played by the otolaryngologist Arthur James Moffett in devoicing the mules of the second Chindit expedition of World War II.
Method
The PubMed database (1900–2017) and Google search engine were used to identify articles related to devoicing mules in the medical and veterinary literature, along with information and images on the Chindit expedition.
Results
This paper reviews the surgical techniques aimed at treating braying in mules, ranging from ventriculectomy and arytenoidectomy to Moffett's approach of vocal cordectomy.
Conclusion
Moffett's technique of vocal cordectomy provided a quick, reproducible and safe solution for devoicing mules. It proved to be advantageous on the battlefield and demonstrated his achievements outside the field of medicine.
Supracricoid laryngectomy with cricohyoidoepiglottopexy is an organ-preserving procedure used to treat laryngeal cancer. However, the post-operative neoglottis tends to be variable in form and difficult to predict.
Methods:
We retrospectively analysed three-dimensional images reconstructed from multidetector-row computed tomography data for 21 patients, assessing arytenoid motion and minimum neoglottic gap cross-sectional area.
Results:
While mean transverse and coronal motion was similar for bilateral and unilateral arytenoids, movement along the sagittal axis was greater for unilateral than bilateral arytenoids. The neoglottic gap during respiration was wider in patients with bilateral arytenoids, but both groups had a similar neoglottic gap during phonation.
Conclusion:
Anterior shifting of the unilateral arytenoid plays an important role in compensating for the inability to achieve neoglottic closure. These two results demonstrate that the unilateral arytenoid alone is capable of achieving sufficient neoglottic narrowing to compensate for the resected arytenoid. Three-dimensional analysis was useful to evaluate the physiological status of the neoglottis after supracricoid laryngectomy with cricohyoidoepiglottopexy.
Supracricoid laryngectomy with cricohyoidoepiglottopexy is an organ-preserving surgical technique used to treat laryngeal cancer. This procedure resects the vocal folds; however, it is unclear how the sound source and airway morphology are involved in phonation through the post-operative neoglottis.
Method:
Multidetector helical computed tomography scanning was performed on two patients who had undergone supracricoid laryngectomy with cricohyoidoepiglottopexy. The cricoid and arytenoid cartilages and the airway were visualised using three-dimensional images.
Results:
The mobility of the arytenoid cartilages was well preserved in the one patient with bilateral arytenoids, and in the other patient with only one arytenoid remaining. Two types of airway configuration were observed during phonation: one patient had a single stream airway, while the other had a combination of several streams.
Conclusion:
In the patient with only one arytenoid remaining, the preserved arytenoid tended to be rotated excessively inward. Therefore, phonation may have also occurred in various airways followed by mucosal vibration, which may be a sound source.
Major late complications, following radiotherapy of head and neck carcinomas, such as laryngeal oedema, perichondritis and chondronecrosis usually occur between three and 12 months after treatment. However, the present case displayed necrosis of the laryngo-tracheal cartilage and ulceration of anterior neck skin with a tracheal fistula 44 years after irradiation. The reasons for the long interval between irradiation and late complications may be explained by long-standing hypovascularity and/or infection of the irradiated area. Histological study revealed chondronecrosis without inflammatory cells in the laryngo-tracheal cartilage and bacterial colonization of subcutaneous tissue. Necrotic tissue was removed and tracheostomy was performed. The fistula was almost completely closed using a delto-pectoral cutaneous flap and the clinical course of patient has been good. This paper demonstrates the possibility of laryngo-tracheal necrosis in cases that had received radiation as long ago as 44 years.
A case of dysphagia due to a post-cricoid web in a seven-year-old boy with Rubinstein-Taybi syndrome is presented. the main features of this syndrome are summarized with particular reference to dysphagia and with previous cases of post-cricoid webs in children reviewed.
A recent study in our department demonstrated that depressing the plunger of a 50-mL syringe was reliably and linearly related to the force applied between 20N and 50N. Using a 50-mL syringe we constructed a simple device to help train anaesthetic assistants to apply cricoid pressure correctly. We then tested anaesthetists, operating department practitioners (non-physicians) and nurses in our hospital to see if they could correctly apply forces of 20 and 40 N. All subjects were then trained using this apparatus and once confident were retested immediately afterwards, and again 1 week and 1 month later. The results show a wide variation in the force applied with only 30% of subjects applying appropriate force at 20N, and 40% at 40N. Training leads to a significant improvement in performance (P < 0.005 at 20N and P < 0.001 at 40N) which is maintained for 1 week for both 20N (P < 0.05) and 40N (P < 0.05) but not for 1 month. Therefore training should be practised on a weekly basis. This is an inexpensive and simple device that we believe to be useful in helping anaesthetic assistants to apply effective cricoid pressure.
The problem of the therapy of glottal and neoglottal insufficiency is still unsolved. The surgical techniques and the materials employed up until now are not completely free from possible partial or total failures, early or late complications, or the need of a second operation. The objective of the study is to introduce a new thyroplasty technique of inserting tubular expanded polytetrafluoroethylene (e-PTFE) into the larynx of an animal model, with the purpose of using it next in human laryngeal tissue augmentation. Seven 30 kg pigs had tubular e-PTFE implanted under endoscopic control into a vocal fold or laryngeal vestibule. The implants were secured by suture to the thyroid cartilage. Short-term results demonstrate the ease and effectiveness of this mini-invasive implant surgical technique. Long-term follow-up is underway in anticipation of applying this technique to human laryngeal tissue augmentation.
Post-radiation necrosis of the larynx is a major complication after irradiation and has become rare. Recently, combined chemotherapy and radiation therapy has been introduced for head and neck tumours. The authors report a case of laryngeal necrosis after combination therapy for a patient with cervical lymph node metastases of nasopharyngeal carcinoma and review the literature on late laryngeal necrosis. Although radiation-induced laryngeal necrosis has become a rare complication, the combination of chemotherapy and radiation therapy may increase its incidence. We should always consider it as a possible late complication and treat it appropriately.
Timely cricothyrotomy may be life-saving, but it is not without its complications. Together with tracheostomy performed too high, there are high incidences of stenosis and voice changes afterwards – often neglected because the patient has so many other problems. Jackson warned of these problems over 70 years ago – his message is still relevant.
Twelve patients with bilateral fixed vocal cords seeking decannulation of their tracheostomies were subjected to endoscopic correction of the compromised airway. They all had arytenoidectomy associated with posterior cordectomy whether as a primary or secondary stage procedure. Decannulation was achieved in all patients using the technique described.
Recommend this
Email your librarian or administrator to recommend adding this to your organisation's collection.