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Ear reconstruction

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https://www.readbyqxmd.com/read/29451456/clival-meningocele-causing-bilateral-hearing-loss-in-a-child-due-to-superficial-siderosis-of-the-central-nervous-system-case-report
#1
Stephen J Johans, Kevin N Swong, Daniel J Burkett, Michael P Wemhoff, Sean M Lew, Chirag R Patel, Anand V Germanwala
Superficial siderosis (SS) of the CNS is a rare and often unrecognized condition. Caused by hemosiderin deposition from chronic, repetitive hemorrhage in the subarachnoid space, it results in parenchymal damage in the subpial layers of the brain and spinal cord. T2-weighted MRI shows the characteristic hypointensity of hemosiderin deposition, classically occurring around the cerebellum, brainstem, and spinal cord. Patients present with progressive gait ataxia and sensorineural hearing impairment. Although there have been several studies, case reports, and review articles over the years, the clear pathophysiology of subarachnoid space hemorrhage remains to be elucidated...
February 16, 2018: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29449572/optimising-the-decellularization-of-human-elastic-cartilage-with-trypsin-for-future-use-in-ear-reconstruction
#2
Shafiq Rahman, Michelle Griffin, Anish Naik, Matthew Szarko, Peter E M Butler
Decellularized scaffolds can induce chondrogenic differentiation of stem cells. This study compares different methods to optimise the decellularization of auricular cartilage. The process consisted of an initial 12 hour dry freeze thaw which froze the cartilage specimens in an empty tube at -20 °C. Samples were allowed to thaw at room temperature followed by submersion in phosphate buffer solution in which they were frozen at -20 °C for a 12 hour period. They were then allowed to thaw at room temperature as before...
February 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29433146/reconstruction-of-tragus-and-external-auditory-meatus-using-remnant-auricle-during-microtia-reconstruction
#3
Gao-Feng Li, Yi-Gao Hu, Wei Ding, Jun Tan, Xin Chen, Tao Luo, Bo Zhang, Xiao-Jia Liu
This article investigates an effective method with which to reconstruct the tragus and external auditory meatus for microtia reconstruction. The external ear was reconstructed using a delayed postauricular skin flap in patients with congenital microtia. After the first stage of delaying the postauricular skin flap and the second stage of otoplasty with ear framework fabricated from autogenous rib cartilage draping with the delayed skin flap, the third stage involved tragus and external auditory meatus canaloplasty...
February 12, 2018: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/29428492/the-gray-scale-value-of-ear-tissues-undergoing-volume-rendering-high-resolution-cone-beam-computed-tomography
#4
Masahiro Komori, Shinya Miuchi, Jun Hyodo, Taisuke Kobayashi, Masamitsu Hyodo
OBJECTIVE: When the thresholds for VR reconstruction from multi-slice CT images are changed, problems develop when assessing pathologies in the absence of standardized thresholds. The advantages of CBCT include lower radiation exposure compared with other techniques and better visualization of small ear structures. However, a disadvantage is that the scanner provides unstandardized gray scale values, thus not CT numbers (Hounsfield units, HU). METHODS: We analyzed 88 sets of volume data obtained from temporal bones...
February 7, 2018: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29419592/refinements-in-elevation-of-the-reconstructed-auricle-the-zigzag-incision
#5
So-Eun Han, Yeseul Eom, Kap Sung Oh
OBJECTIVE: Auricular elevation with superficial temporal fascia and skin graft is widely used in microtia reconstruction using costal cartilage. However, in some patients, there has been occurrence of contraction of skin graft, which led to insufficient projection of the elevated auricle and diminished auriculocephalic angle with unfavorable long-term results. In this article, the authors introduce their multiple triangular flaps with zigzag incision to maintain stable projection and natural retroauricular sulcus appearance in auricular reconstruction patients...
February 6, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29412737/high-pregnancy-and-calving-rates-with-a-limited-number-of-transferred-handmade-cloned-bovine-embryos
#6
Jenin Victor Cortez, Gábor Vajta, Nilton Murga Valderrama, Gleni Segura Portocarrero, Jorge Maicelo Quintana
A major obstacle of widespread commercial application of bovine somatic cell nuclear transfer is the low overall efficiency, that is, healthy calf-late pregnancy per transferred embryo rate. In this study, we report a series of experiments with a limited number of embryos created with handmade cloning (HMC) and transferred without or after open pulled straw vitrification. Embryo reconstruction was performed by using in vitro matured oocytes and adult ear skin fibroblasts. In two experiments, a total of 53 D7 blastocysts were developed from 188 reconstructed embryos...
February 2018: Cellular Reprogramming
https://www.readbyqxmd.com/read/29397114/special-anatomic-considerations-in-otosclerosis-surgery
#7
REVIEW
Helge Rask-Andersen, Nadine Schart-Morén, Karin Strömbäck, Fred Linthicum, Hao Li
The anatomy of the vestibular organs together with considerations of the middle and inner ear anatomy relevant to stapes surgery is discussed. An archival collection of macerated and freshly frozen human temporal bones underwent micro-computed tomography (CT) with subsequent volume-rendering. Three-dimensional (3D) reconstructions and the topographic anatomy of the oval window were considered. Micro-CT and 3D rendering revealed the relationship between the otolith organs and the oval window. Anatomic variations were extensive and included the distance between the footplate and the reconstructed macula margins...
January 31, 2018: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/29396297/in-vitro-regeneration-of-patient-specific-ear-shaped-cartilage-and-its-first-clinical-application-for-auricular-reconstruction
#8
Guangdong Zhou, Haiyue Jiang, Zongqi Yin, Yu Liu, Qingguo Zhang, Chen Zhang, Bo Pan, Jiayu Zhou, Xu Zhou, Hengyun Sun, Dan Li, Aijuan He, Zhiyong Zhang, Wenjie Zhang, Wei Liu, Yilin Cao
Microtia is a congenital external ear malformation that can seriously influence the psychological and physiological well-being of affected children. The successful regeneration of human ear-shaped cartilage using a tissue engineering approach in a nude mouse represents a promising approach for auricular reconstruction. However, owing to technical issues in cell source, shape control, mechanical strength, biosafety, and long-term stability of the regenerated cartilage, human tissue engineered ear-shaped cartilage is yet to be applied clinically...
January 13, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29381620/modified-methods-of-fabricating-helix-and-antihelix-in-total-auricular-reconstruction-based-on-different-length-of-eighth-costal-cartilage
#9
Meirong Yang, Haiyue Jiang, Huibin Li, Xiaobo Yu, Ye Zhang, Bo Pan
BACKGROUND: Attaining an ideal appearance of the reconstructed ear depends primarily on the fabricated cartilaginous ear framework. Despite the role of eighth costal cartilage, the length of the eighth rib cartilage is difficult to anticipate, and growth of the eighth cartilage is variable. The authors discussed modified methods of fabricating helix and antihelix based on different length of eighth costal cartilage. METHODS: Based on the actual length of the eighth costal cartilage, patients were divided into group A and group B...
January 19, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29370001/discussion-polyethylene-ear-reconstruction-a-state-of-the-art-surgical-journey
#10
William J Rifkin, David A Staffenberg
No abstract text is available yet for this article.
February 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29370000/polyethylene-ear-reconstruction-a-state-of-the-art-surgical-journey
#11
John Reinisch, Youssef Tahiri
BACKGROUND: The use of a porous high-density polyethylene implant for ear reconstruction is gradually gaining acceptance because it allows for a pleasing ear reconstruction in young children before they enter school. In response to this growing interest, the authors decided to write an article clarifying in detail all the steps of this challenging procedure. In this article, the authors also answer all the common questions that surgeons have when they come to observe the operation, or when they go back to their respective practices and start performing this procedure...
February 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29358571/a-bone-conduction-implantable-device-as-a-functional-treatment-option-in-unilateral-microtia-with-bilateral-stapes-ankylosis-a-report-of-two-cases
#12
Diego Zanetti, Federica Di Berardino
BACKGROUND Implantable devices have been proposed as an alternative to hearing aids and auditory canal reconstruction in patients with microtia (congenital aural atresia), which includes a malformation of the external and middle ear. This report is of two rare cases of microtia associated with congenital stapes ankylosis treated with an implantable device and describes the treatment outcomes. CASE REPORT Two siblings from Ecuador, a 29-year-old woman, and her 35-year-old brother, were born with unilateral type II microtia with bilateral external auditory canal atresia and conductive hearing loss...
January 23, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29352233/hearing-capacities-and-morphology-of-the-auditory-system-in-serrasalmidae-teleostei-otophysi
#13
Geoffrey Mélotte, Eric Parmentier, Christian Michel, Anthony Herrel, Kelly Boyle
Like all otophysan fishes, serrasalmids (piranhas and relatives) possess a Weberian apparatus that improves their hearing capacities. We compared the hearing abilities among eight species of serrasalmids having different life-history traits: herbivorous vs. carnivorous and vocal vs. mute species. We also made 3D reconstructions of the auditory system to detect potential morphological variations associated with hearing ability. The hearing structures were similar in overall shape and position. All the species hear in the same frequency range and only slight differences were found in hearing thresholds...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29342049/the-impact-of-the-transcanal-endoscopic-approach-and-mastoid-preservation-on-recurrence-of-primary-acquired-attic-cholesteatoma
#14
Livio Presutti, Lukas Anschuetz, Alessia Rubini, Marco Ruberto, Matteo Alicandri-Ciufelli, Marco Dematte, Marco Caversaccio, Daniele Marchioni
OBJECTIVE: We aim to investigate the factors associated with recurrent disease following surgery for primary acquired attic cholesteatoma. We hypothesize that minimal invasive, mucosal sparing operation techniques have beneficial effects on the outcome in terms of recurrence. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center. PARTICIPANTS: A total of 110 patients presenting with primary acquired attic cholesteatoma were enrolled in the study...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29332169/measuring-cochlear-duct-length-in-asian-population-worth-giving-a-thought
#15
Mohnish Grover, Shitanshu Sharma, Shashank Nath Singh, Tanmaya Kataria, Rajendra Singh Lakhawat, Man Prakash Sharma
INTRODUCTION: The anatomy of the cochlea forms the basis for a successful cochlear implantation. Cochlear duct length (CDL) is defined as the length of the scala media as measured from the middle of the round window to helicotrema. Preoperative measurement of CDL is particularly important when precise intracochlear electrode array placement is desired. It can be done both histologically and radiologically. Preoperative high-resolution computed tomography (HRCT) scan which forms an integral part of cochlear implant workup is a useful tool to calculate CDL using 3D reconstructions...
January 13, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29328534/split-thickness-skin-grafting-for-reconstruction-of-auricular-skin-defects-a-statistical-analysis
#16
Tobias Thuile, Lorenz Larcher, Barbara Gatscher, Karl Schwaiger, Jenny Deluca, Amgiad Fallaha, Lukas Tappeiner, Mario Puviani, Klaus Eisendle
BACKGROUND AND OBJECTIVES: Surgical reconstruction following the removal of large malignant auricular lesions is challenging. While many options for defect closure have been described, in the elderly population usually affected flap surgery, long anesthesia times, patient compliance, and anticoagulant therapy pose additional risks. An alternative quick, simple, and effective method of defect closure is therefore highly desirable. The objective of the present study was to assess the aesthetic outcome, healing process, complications, and recurrence rates associated with unmeshed split-thickness skin grafts (STSGs) used for covering large auricular skin defects following cartilage-sparing skin cancer removal...
January 12, 2018: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/29311019/the-ideal-ear-position-in-caucasian-females
#17
P Niclas Broer, Aung Thiha, Denis Ehrl, Sammy Sinno, Sabrina Juran, Caroline Szpalski, Reuben Ng, Milomir Ninkovic, Lukas Prantl, Paul I Heidekrueger
PURPOSE: Ear position contributes significantly to facial appearance. However, while objective measurements remain the foundation for esthetic evaluations, little is known about how an ear should ideally be positioned regarding its rotational axis. This study aimed to further evaluate whether there exists a universally applicable ideal ear axis, and how sociodemographic factors impact such preferences. MATERIALS AND METHODS: An interactive online survey was designed, enabling participants to change the axis of a female model's ear in terms of its forward and backward rotation...
December 26, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29303853/patient-perception-and-satisfaction-questionnaire-for-microtia-reconstruction-a-new-clinical-tool-to-improve-patient-outcome
#18
Chunxiao Cui, Yiyuan Li, Ruhong Zhang, Qun Zhang, Zhicheng Xu, Ernest S Chiu, Feng Xu, Datao Li, Tianya Li, Wei Chen
BACKGROUND: Patients' satisfaction is an increasingly important indicator for successful ear reconstruction surgeries. However, there is no scientifically sound patient-based outcome instrument in this field. This study aims at developing a patient-reported outcome measure for microtia reconstruction for investigating patients' satisfaction and perception of reconstructed ear and clinical researches. METHODS: The development of questionnaire included 3 stages. Traditional psychometric tests were used for analysis...
January 4, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29279725/tympanoplasty-news-and-new-perspectives
#19
REVIEW
Marcus Neudert, Thomas Zahnert
Techniques and biomaterials for reconstructive middle ear surgery are continuously and steadily developing. At the same time, clinical post-surgery results are evaluated to determine success or failure of the therapy. Routine quality assessment and assurance is of growing importance in the medical field, and therefore also in middle ear surgery. The exact definition and acquisition of outcome parameters is essential for both a comprehensive and detailed quality assurance. These parameters are not the audiological results alone, but also additional individual parameters, which influence the postoperative outcome after tympanoplasty...
2017: GMS Current Topics in Otorhinolaryngology, Head and Neck Surgery
https://www.readbyqxmd.com/read/29249247/-what-s-new-in-instrumental-dermatology
#20
V Chaussade
This "What's new in instrumental dermatology" dedicated skin surgeryis based upon a 2015-2017 literature analysis. The excision of skin cancers is an important part of surgical dermatology. Will artificial intelligence and new drug be able to face the increasing need for therapy? Wrong-site surgery is due to multiple factors. Photographs of biopsy site and short time between biopsy and surgery decrease postponement of surgery and wrong-site surgery. Noninvasive imaging technologies are improving and help to delineate skin tumors and increase the probability of complete tumor removal...
December 2017: Annales de Dermatologie et de Vénéréologie
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