Optimizing Ossicular Prosthesis Design and Placement.

Optimizing Ossicular Prosthesis Design and Placement. Adv Otorhinolaryngol. 2018;81:14-23 Authors: Bance M Abstract Middle ear hearing reconstruction is unpredictable. Difficulties arise because of host factors, such as ventilation or scarring, surgical technique factors, such as prosthesis placement and stabilization, and design and mechanical factors influencing the properties of the prosthesis. Often there is a balancing act between choosing optimal stability, and maximizing the mechanical vibrations of the prosthesis. We review our and other investigators' work, in design and ideal placement of middle ear prostheses. Middle ear prostheses need to be rigid enough to deliver acoustic forces without bending. Prosthesis mass has a modest effect at higher frequencies. A key point is that rotational movements of the prosthesis have to be constrained. Prosthesis head size and cartilage interposition, within reason, have little effect on vibration transmission. Reconstruction to the malleus may have some small mechanical advantage; however this is not clearly proven. Similarly, there is no proven advantage in reconstructing to the stapes head instead of the footplate. The most important factor for good long term results is probably the stability of the prosthesis, both to acute inertial forces such as trauma, and to slower term changes such as tympanic membrane position and scarring contractures. PMID: 29794433 [PubMed - in process]
Source: Advances in Oto-Rhino-Laryngology - Category: ENT & OMF Tags: Adv Otorhinolaryngol Source Type: research

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Publication date: Available online 18 November 2019Source: Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of LipidsAuthor(s): Zhen Wang, Hui Gyu Park, Dong Hao Wang, Riki Kitano, Kumar S.D. Kothapalli, J. Thomas BrennaAbstractBranched chain fatty acids (BCFA) and linear chain/normal odd chain fatty acids (n-OCFA) are major fatty acids in human skin lipids, especially sebaceous gland (SG) wax esters. Skin lipids contain variable amounts of monounsaturated BCFA and n-OCFA, in some reports exceeding over 20% of total fatty acids. Fatty acid desaturase 2 (FADS2) codes for a multifunctional enzyme that catalyz...
Source: Biochimica et Biophysica Acta (BBA) Molecular and Cell Biology of Lipids - Category: Lipidology Source Type: research
ConclusionsThe median h-index for an academic thoracic surgeon in Canada and the United States is 10. Surgeons who engage in Twitter activity are more likely to have their research cited by others.
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
ConclusionsEarly-diastolic phase slope of the HVAD flow waveform might be a novel parameter that can estimate the presence of clinically significant AI.
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
ConclusionsOnline education for cardiothoracic surgery is seeing increased public use, with high ratings for content and utility. Despite aggressive marketing to STS members, most remain unaware of this website’s existence. Those who are aware approve of its content, but adoption of referring patients to it has been slow. Improved strategies are necessary to make surgeons aware of this STS-provided service and to increase patient referrals to it.
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
This study evaluated outcomes associated with treatment strategies for this nonagenarian population.MethodsTreatment and overall survival for patients 90 years and older with NSCLC in the National Cancer Data Base (2004-2014) were evaluated using logistic regression, the Kaplan-Meier method, and multivariable Cox proportional hazard models.ResultsThe majority (n = 4152, 57.6%) of the 7205 patients 90 years or older with stage I-IV NSCLC did not receive any therapy. For the entire cohort, receiving treatment was associated with significantly better survival when compared with no therapy (5-year survival, 9.3% [95% confidenc...
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
ConclusionsThe delay in surgical resection of StageIIIa NSCLC is not associated increased early mortality, however it is associated with worse 3-year post-resection survival.
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
Publication date: March 2020Source: Interdisciplinary Neurosurgery, Volume 19Author(s): Joel Kaye, Ahmed Meleis, Shabbar Danish, Zhenggang XiongAbstractMeningiomas are relatively slow-growing, typically benign tumors that arise from the arachnoid cells which form the meninges. They are the most common primary brain tumor and account for nearly one-third of all primary brain and spine tumors. Meningiomas can arise from any dural site, however they are infrequently found at the cerebellopontine angle (CPA). While WHO grade I meningiomas are benign and the slowest growing, WHO grade II meningiomas grow significantly faster, d...
Source: Interdisciplinary Neurosurgery - Category: Neurosurgery Source Type: research
We present a case of Moyamoya disease in an infant who presented with neurological symptoms including convulsions and motor deficits. He was misdiagnosed two times and finally investigated in a tertiary hospital with brain computed tomography and magnetic resonance imaging showing affected vessels with typical pattern of Moyamoya diseases in the brain. He underwent surgical intervention and scheduled for follow up.
Source: Interdisciplinary Neurosurgery - Category: Neurosurgery Source Type: research
ConclusionsIn the current series, the factors which were associated with an increased rate of iatrogenic pituitary injury were: increased manipulation of the gland intra-operatively, a firm tumor consistency not amenable to suction or curettage, and larger pituitary adenoma size. Recognition of the heterogeneity of macroadenoma consistency and growth patterns and appropriate usage of intra- and/or extra-capsular tumor resection techniques may help mitigate the risk of surgical pituitary injury.
Source: Interdisciplinary Neurosurgery - Category: Neurosurgery Source Type: research
Conclusion. The hexane extract of L. apiculata leaves showed the lower MIC against S. aureus when compared with extracts obtained from other parts of the plant. The growth curve and the colonies count suggest a bacteriostatic activity of the L. apiculata leaves extract against Staphylococcus aureus. PMID: 31737073 [PubMed]
Source: International Journal of Microbiology - Category: Microbiology Tags: Int J Microbiol Source Type: research
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