The ethmoid arteries, comprising the anterior and posterior branches, are integral vascular structures that hold immense significance in the realm of sinus and skull base surgery. Originating from the third segment of the ophthalmic artery, these arteries traverse through the medial orbit before passing through the respective ethmoidal canals and entering the ethmoid air cells. Understanding the anatomical significance and clinical implications of the anterior and posterior ethmoid arteries is paramount in ensuring safe and effective management of sinus pathologies and associated complications. Accurate preoperative assessment, appropriate surgical techniques, and a thorough knowledge of these vascular structures are essential for optimizing patient outcomes and minimizing the risk of adverse events during surgical interventions.
Partial laryngectomy, with its roots tracing back to the early 19th century, has evolved over time as an alternative operative approach for a select group of patients with glottic and supraglottic malignancies. The goal was to preserve speech and swallowing without committing to a permanent tracheostomy. In this video, in the context of a cadaver dissection course held at Duke University, the techniques for partial laryngectomy are demonstrated. The initial segment of this video focuses on explaining the two types of laryngeal surgeries: supraglottic laryngectomy and supracricoid laryngectomy with cricohyodopexy, or cricohyodoepiglottopexy (CHEP). Although these surgeries aim to preserve the functionality of the larynx, performing them may impact voice, swallowing, and airway protection.
Functional endoscopic sinus surgery (FESS) is a minimally-invasive technique involving the use of an endoscope to visualize and access the paranasal sinuses, allowing for precise and targeted removal of diseased tissue. The cadaveric video on FESS presented here offers a detailed and comprehensive guide to maxillary, ethmoid, and sphenoid sinus dissection. The step-by-step approach, coupled with the emphasis on anatomical considerations, makes this video an essential resource for healthcare professionals involved in the management of sinonasal disorders.
Temporal Bone Dissection (Cadaver) Cameron M. A. Crasto1; C. Scott Brown, MD2 1University of Toledo College of Medicine 2University of Miami Miller School of Medicine
Temporal bone dissections are a critical learning tool for otologic/neurotologic surgery. The “Temporal Bone Dissection Manual” from the House Institute has long served as a ‘gold standard’ for the stepwise demonstration of this process. In this video, a progressive step-by-step dissection of the temporal bone is performed. Key anatomical structures and landmarks and outlined, and their physiological importance in the context of different otologic pathologies is explained. The procedure begins with the identification of soft tissue landmarks and surface anatomy before delving into cortical mastoidectomy and facial nerve identification. The mastoid tip region is discussed, before moving on to describe the tegmen and endolymphatic sac. A facial recess dissection is performed and middle ear anatomy is explained. A labyrinthectomy and exposure of the internal auditory canal conclude the dissection. In addition to going over the anatomy of the temporal bone dissection, a discussion of how to execute these procedures safely and efficiently is conducted.
By having a thorough understanding of the anatomy of the temporal bone, medical students, residents, and fellows are better able to understand the reasoning behind different otologic procedures and how they can be used to treat patients. This demonstration was created to inform and teach residents and medical students about temporal bone anatomy.
Bilateral axillo-breast approach (BABA) is a contemporary technique for remote-access thyroidectomy. BABA robotic thyroidectomy (RT) offers a number of benefits over other remote-access thyroidectomy techniques, such as provision of a three-dimensional symmetric view of bilateral thyroid lobes and optimal visualization of important anatomical landmarks, including the recurrent laryngeal nerve (RLN), thyroidal vessels, parathyroid glands, and the trachea.
This educational video is a thorough demonstration of BABA RT performed on a young female patient diagnosed with a left-sided thyroid nodule in her early thirties. The thyroid fine needle aspiration biopsy of the 4-cm nodule was indeterminate. Additional molecular testing of the specimen had revealed one of the mutations associated with thyroid cancer. Therefore, a diagnostic thyroid lobectomy was planned. The patient had expressed a strong desire to avoid an obvious neck scar, and therefore, the BABA RT was offered.
The middle fossa approach is indicated for procedures requiring access to the internal auditory canal, structures within the temporal bone, and adjacent structures. This is one of the three main approaches for the surgical repair of tegmental defects causing cerebrospinal fluid (CSF) leak. The middle fossa approach allows for an optimal view of the middle fossa floor for larger or multiple defects, ease of graft placement, and avoidance of the removal of ossicle to access the tegmen.
Surgical intervention for CSF leak is indicated when conservative management fails or when spontaneous closure of a defect is unlikely. In this case, a middle fossa approach is used to surgically close a tegmen defect causing CSF otorrhea refractory to conservative management. This case highlights the step-by-step surgical techniques involved in this procedure including the surgical approach to expose the tegmen defect, repair of the tegmen defect using temporalis fascia and a bone graft, and craniotomy repair and closure.
Stapedotomy (Endaural) David M. Kaylie, MD, MS1; Trey A. Thompson2; C. Scott Brown, MD1 1Duke University Medical Center 2University of Washington School of Medicine
Otosclerosis is a condition characterized by abnormal bone growth that inhibits the movement of the stapes, leading to a gradual conductive hearing loss. The treatment options encompass observation, the use of hearing aids, and surgical intervention. If the patient opts for surgery, either a stapedotomy or a stapedectomy can be executed to liberate the stapes from the sclerotic bone.
In the case of a stapedotomy performed with an endaural approach, access to the middle ear is gained through a minor incision extending from the anterior ear canal to the incisura, also known as the intertragal notch. The surgeon then proceeds to remove the superstructure of the stapes, create an opening in the footplate of the stapes, and subsequently place a prosthesis into the opening, which is then connected to the incus. The outcomes of this procedure are generally positive, with 90–95% of patients experiencing an improvement in hearing.
Laryngeal granulomas present with clinical signs and symptoms including dysphonia, hoarseness, discomfort or pain in the throat, and dyspnea. Notably, vocal granuloma, despite its name, pathologically is not a true granulomatous process. Instead, it is characterized as a reactive/reparative process where intact or ulcerated squamous epithelium is underlaid by granulation tissue or fibrosis. Although granulomas are typically of benign nature, they often require surgical treatment. Other options for treatment include proton-pump inhibitors (PPIs) and steroid inhalations, botulinum neurotoxin injection, and phonotherapy. Nearly half of the cases usually remit through clinical management involving PPIs, topical inhalant steroids, and phonotherapy.
This is a case discussing a 21-year-old male who suffered from both non-comminuted mandibular parasymphyseal and body fractures as a result of a motor vehicle accident, requiring open reduction internal fixation (ORIF) without postoperative maxillomandibular fixation (MMF). The fracture was complicated by a broken tooth root, which required extraction.
After intraoperative MMF, ORIF was performed. The parasymphyseal fracture was plated using two locking four-hole 2-mm thick miniplates utilizing two locking screws on either side of the fracture with one plate along the alveolar surface (monocortical screw) and one along the basal surface (bicortical screw). For the right body fracture, a three-dimensional locking ladder plate was used via a transbuccal trocar approach for additional exposure needed for proper screw placement. Once the hardware was secured, the patient was taken out of MMF and restoration of premorbid occlusion was confirmed. Lastly, watertight mucosal closure was performed using absorbable sutures and Dermabond (cyanoacrylate adhesive).
Coronavirus disease 2019 (COVID-19) has emerged as a worldwide pandemic, profoundly impacting healthcare systems. Despite the use of personal protective equipment, concerns remain over the potential transmission of SARS-CoV-2 for otolaryngologists. Transmission occurs via respiratory droplets and aerosolized virus particles, which are generated during specific interventions such suctioning, bone drilling, and the application of diathermy. The mastoid and middle ear mucosa are connected to the nasopharyngeal mucosa and can serve as a potential source of viral particles in an infected patient. This highlights the need for the development and implementation of strategies that minimize aerosol spread.
