AI Article Synopsis
Article Abstract
An acoustical transmission line model of the middle-ear cavities and mastoid air cell system (MACS) was constructed for the adult human middle ear with normal function. The air-filled cavities comprised the tympanic cavity, aditus, antrum, and MACS. A binary symmetrical airway branching model of the MACS was constructed using an optimization procedure to match the average total volume and surface area of human temporal bones. The acoustical input impedance of the MACS was calculated using a recursive procedure, and used to predict the input impedance of the middle-ear cavities at the location of the tympanic membrane. The model also calculated the ratio of the acoustical pressure in the antrum to the pressure in the middle-ear cavities at the location of the tympanic membrane. The predicted responses were sensitive to the magnitude of the viscothermal losses within the MACS. These predicted input impedance and pressure ratio functions explained the presence of multiple resonances reported in published data, which were not explained by existing MACS models.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4417022 | PMC |
| http://dx.doi.org/10.1121/1.4916200 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
BA inhibits LPS-stimulated inflammatory response and apoptosis in human middle ear epithelial cells by regulating the Nf-Kb/Iκbα axis.
Open Life Sci
December 2024
Department of ENT, Yueqing People's Hospital, 338, Qingyuan Road, Chengnan Street, Yueqing City, Wenzhou, Zhejiang, 325600, China.
Otitis media (OM) is a prevalent childhood ear disease characterized by inflammation of the middle ear cavity, which can lead to ear pain, fever, and hearing loss. The pathogenesis of OM is multifaceted, encompassing a variety of factors including bacterial or viral infections, host immune responses, and the function of middle ear epithelial cells. Boswellic acid (BA), a natural triterpene compound extracted from frankincense resin, has been proven to possess significant anti-inflammatory and immunomodulatory effects.
View Article and Find Full Text PDFOptimizing the hyperbaric chamber pressurization profile during standard hyperbaric oxygen therapy.
Undersea Hyperb Med
January 2025
King Hamad American Mission Hospital, A'ali, Kingdom of Bahrain.
Middle ear barotrauma (MEBT) is the most common complication in providing hyperbaric oxygen therapy (HBO). This study explored the impact of altering the shape of the time-pressure curve with the aim of reducing the occurrence of MEBT and optimizing the HBO experience during the pressurization process. Four distinct mathematically derived protocols-Constant Pressure Difference (CPD), Constant Volume Difference (CVD), Constant Ratio (CR), and Inverted Constant Ratio (ICR)-were investigated using computer simulations on a simple ear model.
View Article and Find Full Text PDFSquamous Cell Carcinomas of the Sinonasal Region and Temporal Bone Diagnosed After Recurrences: A Report of Two Patients.
Int J Surg Pathol
January 2025
Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The University of Tennessee Health Sciences Center, Memphis, TN, USA.
squamous cell carcinoma is a recently recognized entity characterized by a non-viral-related non-keratinizing squamous cell carcinoma with chromosomal rearrangement between on 6p22.3 and on Xq28. This neoplasm is associated with an aggressive clinical behavior, particularly regarding local recurrences and distant metastases even with its deceptively bland histomorphology.
View Article and Find Full Text PDFPostoperative Hearing Outcomes and Usefulness of Endoscopy-Assisted Tympanoplasty in Pars Tensa Cholesteatoma.
Int Arch Otorhinolaryngol
January 2025
Department of Otorhinolaryngology. Head and Neck Surgery, National Defense Medical College, Saitama, Japan.
In recent years, transcanal endoscopic ear surgery (TEES) has gained widespread recognition as an excellent surgical field for blind spots such as the sinus tympani (ST) when compared to microscopic ear surgery (MES). To investigate the postoperative hearing results for pars tensa cholesteatoma and the indications for utilizing endoscopy. The medical records of 16 patients (10 men and 6 women) with pars tensa cholesteatoma, who received initial surgical treatment between 2018 and 2022, were reviewed.
View Article and Find Full Text PDFBromelain Supplementation in the Management of Otitis Media with Effusion in Children.
Children (Basel)
November 2024
Department of Health Promotion Sciences, Maternal and Child Care, Internal Medicine and Medical Specialties 'Giuseppe D'Alessandro', University of Palermo, Via del Vespro 133, 90127 Palermo, Italy.
Background/objectives: The respiratory system is prone to infectious diseases, especially in children below five years of age. Upper respiratory tract infections in children are often associated with Eustachian tube dysfunction and complicated by otitis media with effusion (OME), an inflammatory process within the middle ear, which can lead to hearing loss. Treatment for these infections involves a combination of medication and symptom relief, depending on the severity and cause of the infection.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!