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https://www.readbyqxmd.com/read/28502649/post-implantation-development-of-red-rumped-agouti-dasyprocta-leporina-linnaeus-1758
#1
Gleidson Benevides de Oliveira, Hélio Noberto de Araújo Júnior, Herson da Silva Costa, Alexandre Rodrigues Silva, Carlos Eduardo Bezerra de Moura, Hugo Alexandre de Oliveira Rocha, Maria Angélica Miglino, Moacir Franco de Oliveira
Fourteen pregnant agouti (Dasyprocta leporina Linnaeus, 1758) females at gestational ages of 30-100days and two at gestational ages of 55-100days, were studied, including 24 embryos/fetuses and two neonates (single offspring from two females). Females were euthanized and embryos/fetuses were examined, measured, and photographed. Embryos at 30days post-copulation were "C-shaped," with paddle-shaped limb buds and 10.75±0.11mm crown-rump length (CRL). In embryos at 35days post-copulation, paddle-shaped forelimbs, fin-shaped pelvic limbs, and a liver bud were evident, with 15...
May 2, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28499298/-cochlear-implant-state-of-the-art
#2
Thomas Lenarz
Cochlear implants are the treatment of choice for the auditory rehabilitation of patients with sensory deafness. They restore the missing function of inner hair cells by transforming the acoustic signal into electrical stimuli for activation of auditory nerve fibers. Due to the very fast technology development cochlear implants provide open-set speech understanding in the majority of patients including the use of the telephone. Children can achieve a near to normal speech and language development provided their deafness is detected early after onset and implantation is performed quickly thereafter...
April 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28498269/real-time-intracochlear-electrocochleography-obtained-directly-through-a-cochlear-implant
#3
Michael S Harris, William Jason Riggs, Kanthaiah Koka, Leonid M Litvak, Prashant Malhotra, Aaron C Moberly, Brendan P O'Connell, Jourdan Holder, Federico Alberto Di Lella, Carlos Mario Boccio, George B Wanna, Robert F Labadie, Oliver F Adunka
HYPOTHESIS: Utilizing the cochlear implant to record electrophysiologic responses during device placement is a feasible and efficacious technique for monitoring near real-time cochlear physiology during and following electrode insertion. BACKGROUND: Minimizing intracochlear trauma during cochlear implantation has emerged as a highly researched area to help improve patient performance. Currently, conventional cochlear implant technology allows for the recording of electrically evoked compound action potentials (eCAPs)...
May 11, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28498265/the-effect-of-systemic-steroid-on-hearing-preservation-after-cochlear-implantation-via-round-window-approach-a-guinea-pig-model
#4
Mun Young Chang, Yoon Chan Rah, Jun Jae Choi, Shin Wook Woo, Yu-Jung Hwang, Hayden Eastwood, Stephen J O'Leary, Jun Ho Lee
HYPOTHESIS: When administered perioperatively, systemic dexamethasone will reduce the hearing loss associated with cochlear implantation (CI) performed via the round window approach. BACKGROUND: The benefits of electroacoustic stimulation have led to interest in pharmacological interventions to preserve hearing after CI. METHODS: Thirty guinea pigs were randomly divided into three experimental groups: a control group; a 3-day infusion group; and a 7-day infusion group...
May 11, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28469553/intracochlear-recordings-of-acoustically-and-electrically-evoked-potentials-in-nucleus-hybrid-l24-cochlear-implant-users-and-their-relationship-to-speech-perception
#5
Jae-Ryong Kim, Viral D Tejani, Paul J Abbas, Carolyn J Brown
The Hybrid cochlear implant (CI) has been developed for individuals with high frequency hearing loss who retain good low frequency hearing. Outcomes have been encouraging but individual variability is high; the health of the cochlea and the auditory nerve may be important factors driving outcomes. Electrically evoked compound action potentials (ECAPs) reflect the response of the auditory nerve to electrical stimulation while electrocochleography (ECochG) reflects the response of the cochlear hair cells and auditory nerve to acoustic stimulation...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28388970/contemporary-imaging-of-auditory-implants
#6
REVIEW
S E J Connor
There have been significant advances in the diversity and effectiveness of hearing technologies in recent years. Implanted auditory devices may be divided into those that stimulate the cochlear hair cells (bone conduction devices and middle ear implants), and those that stimulate the neural structures (cochlear implants and central auditory implants). Contemporary preoperative and postoperative imaging may be used to help individualise implant selection, optimise surgical technique and predict auditory outcome...
April 4, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28388662/scanning-laser-optical-tomography-for-in-toto-imaging-of-the-murine-cochlea
#7
Lena Nolte, Nadine Tinne, Jennifer Schulze, Dag Heinemann, Georgios C Antonopoulos, Heiko Meyer, Hans Gerd Nothwang, Thomas Lenarz, Alexander Heisterkamp, Athanasia Warnecke, Tammo Ripken
The mammalian cochlea is a complex macroscopic structure due to its helical shape and the microscopic arrangements of the individual layers of cells. To improve the outcomes of hearing restoration in deaf patients, it is important to understand the anatomic structure and composition of the cochlea ex vivo. Hitherto, only one histological technique based on confocal laser scanning microscopy and optical clearing has been developed for in toto optical imaging of the murine cochlea. However, with a growing size of the specimen, e...
2017: PloS One
https://www.readbyqxmd.com/read/28387239/survival-of-human-embryonic-stem-cells-implanted-in-the-guinea-pig-auditory-epithelium
#8
Min Young Lee, Sandra Hackelberg, Kari L Green, Kelly G Lunghamer, Takaomi Kurioka, Benjamin R Loomis, Donald L Swiderski, R Keith Duncan, Yehoash Raphael
Hair cells in the mature cochlea cannot spontaneously regenerate. One potential approach for restoring hair cells is stem cell therapy. However, when cells are transplanted into scala media (SM) of the cochlea, they promptly die due to the high potassium concentration. We previously described a method for conditioning the SM to make it more hospitable to implanted cells and showed that HeLa cells could survive for up to a week using this method. Here, we evaluated the survival of human embryonic stem cells (hESC) constitutively expressing GFP (H9 Cre-LoxP) in deaf guinea pig cochleae that were pre-conditioned to reduce potassium levels...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28386212/characterizing-electrocochleography-in-cochlear-implant-recipients-with-residual-low-frequency-hearing
#9
Christofer W Bester, Luke Campbell, Adrian Dragovic, Aaron Collins, Stephen J O'Leary
Objective: Lay the groundwork for using electrocochleography (ECochG) as a measure of cochlear health, by characterizing typical patterns of the ECochG response observed across the electrode array in cochlear implant recipients with residual hearing. Methods: ECochG was measured immediately after electrode insertion in 45 cochlear implant recipients with residual hearing. The Cochlear Response Telemetry system was used to record ECochG across the electrode array, in response to 100- or 110-dB SPL pure tones at 0...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28381734/implant-supported-oral-rehabilitation-in-child-with-ectodermal-dysplasia-4-year-follow-up
#10
Thaisa Cezária Triches, Marcos Ximenes, João Gustavo Oliveira de Souza, Armando Rodrigues Lopes Pereira Neto, Antônio Carlos Cardoso, Michele Bolan
Ectodermal dysplasia (ED) is an anomaly determined by genetic factors that alter ectodermal structures such as skin, hair, nails, glands, and teeth. Children affected by this condition require extensive, comprehensive, and multidisciplinary treatment. An 8-year-old female patient visited the Dentistry Clinic of the Federal University of Santa Catarina with the chief complaint of multiple missing teeth. The mother reported that the patient had ED. Clinical and radiographic examination revealed the congenital absence of several primary and permanent teeth and tooth germs...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28352608/an-innovative-scalp-dyeing-technique-with-gentian-violet-solution-during-follicular-unit-extraction-for-white-haired-follicular-units
#11
Min Seon Moon, Jong Pil Choi
There exist some restrictions and difficulties in performing follicular unit extraction (FUE) in white-haired patients, for several reasons. In this paper, we introduce a novel technique for visualizing white hair during the punching procedure and graft preparation in FUE for white-haired patients. In white-haired older male patients, we dyed the surrounding scalp skin purple with a gentian violet solution-stained toothpick. Our method has several advantages: surgeons can easily focus on the center of the follicular unit and rapidly perform punching, they can recognize the condition of the harvested follicular units during FUE, and the hair transplant team can secure a clear view for trimming and loading into the implanter...
March 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28350869/in-vitro-skin-models-to-study-epithelial-regeneration-from-the-hair-follicle
#12
Nkemcho Ojeh, Baki Akgül, Marjana Tomic-Canic, Mike Philpott, Harshad Navsaria
The development of dermal equivalents (DEs) for the treatment of burns has contributed toward efficient wound closure. A collagen-glycosaminoglycan DE (C-GAG) grafted with hair follicles converted a full-thickness wound to partial-thickness resulting in complete wound closure and restored hair. In this study we compared the ability of both intact pilosebaceous units (PSU) or truncated hair follicles (THF) to regenerate a multilayered epidermis in vitro when implanted into de-epidermalized dermis (DED) or C-GAG with the epidermis generated in vivo using C-CAG...
2017: PloS One
https://www.readbyqxmd.com/read/28336116/purulent-pericarditis-by-staphylococcus-panton-valentine-secondary-to-hair-implants
#13
Leydimar Anmad Shihadeh, Patricia Couto Comba, Carolina Hernández Carballo
No abstract text is available yet for this article.
March 20, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28280893/aesthetic-eyebrow-reconstruction-with-an-expanded-scalp-island-flap-pedicled-by-the-superficial-temporal-artery
#14
Xing Yuan Pang, Jun Ren, Wei Xu, Rui Wan, Wei Yuan, Ying Shu
PURPOSE: This case study demonstrates a new operative method of eyebrow reconstruction, in which the hair density of the reconstructed eyebrow is controlled by the surgeon and is more similar to that of the uninjured side, resulting in a more natural facial expression and greater aesthetic value for our patients. MATERIALS AND METHODS: The operation was divided into two stages: Stage 1: Implantation of a soft tissue expander into the corresponding subgaleal position of the parietal branch of the superficial temporal artery on the injured side, followed by dilation of the expander until the density of the hair on the expanded scalp reached a suitable value and was lower than that of the uninjured eyebrow...
March 9, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28225734/auditory-performance-and-electrical-stimulation-measures-in-cochlear-implant-recipients-with-auditory-neuropathy-compared-with-severe-to-profound-sensorineural-hearing-loss
#15
Joseph Attias, Tally Greenstein, Miriam Peled, David Ulanovski, Jay Wohlgelernter, Eyal Raveh
OBJECTIVES: The aim of the study was to compare auditory and speech outcomes and electrical parameters on average 8 years after cochlear implantation between children with isolated auditory neuropathy (AN) and children with sensorineural hearing loss (SNHL). DESIGN: The study was conducted at a tertiary, university-affiliated pediatric medical center. The cohort included 16 patients with isolated AN with current age of 5 to 12.2 years who had been using a cochlear implant for at least 3...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28222835/clinical-assessment-of-urinary-tract-damage-during-sustained-release-estrogen-supplementation-in-mice
#16
Dalis E Collins, Kathleen R Mulka, Mark J Hoenerhoff, Russell S Taichman, Jason S Villano
Estrogen supplementation is a key component of numerous mouse research models but can adversely affect the urinary system. The goal of this study was to develop a clinical scoring system and identify biomarkers of occult urinary tract lesions prior to the development of systemic illness in mice. Ovariectomized or sham-surgery SCID mice were implanted subcutaneously with a placebo pellet or one containing sustained-release estradiol (0.18 mg 60-d release 17β-estradiol). Mice were assessed twice weekly for 4 to 6 wk by using a clinical scoring system that included body condition, general activity, posture, hair coat, hydration, abdominal distension, urine staining of coat and skin, and ability to urinate...
February 1, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28209736/pejvakin-a-candidate-stereociliary-rootlet-protein-regulates-hair-cell-function-in-a-cell-autonomous-manner
#17
Marcin Kazmierczak, Piotr Kazmierczak, Anthony W Peng, Suzan L Harris, Prahar Shah, Jean-Luc Puel, Marc Lenoir, Santos J Franco, Martin Schwander
Mutations in the Pejvakin (PJVK) gene are thought to cause auditory neuropathy and hearing loss of cochlear origin by affecting noise-induced peroxisome proliferation in auditory hair cells and neurons. Here we demonstrate that loss of pejvakin in hair cells, but not in neurons, causes profound hearing loss and outer hair cell degeneration in mice. Pejvakin binds to and colocalizes with the rootlet component TRIOBP at the base of stereocilia in injectoporated hair cells, a pattern that is disrupted by deafness-associated PJVK mutations...
March 29, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28169594/keratin-hydrogel-enhances-in-vivo-skeletal-muscle-function-in-a-rat-model-of-volumetric-muscle-loss
#18
J A Passipieri, H B Baker, Mevan Siriwardane, Mary D Ellenburg, Manasi Vadhavkar, Justin M Saul, Seth Tomblyn, Luke Burnett, George J Christ
Volumetric muscle loss (VML) injuries exceed the considerable intrinsic regenerative capacity of skeletal muscle, resulting in permanent functional and cosmetic deficits. VML and VML-like injuries occur in military and civilian populations, due to trauma and surgery as well as due to a host of congenital and acquired diseases/syndromes. Current therapeutic options are limited, and new approaches are needed for a more complete functional regeneration of muscle. A potential solution is human hair-derived keratin (KN) biomaterials that may have significant potential for regenerative therapy...
April 14, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28162053/cell-and-growth-factor-loaded-keratin-hydrogels-for-treatment-of-volumetric-muscle-loss-in-a-mouse-model
#19
H B Baker, J A Passipieri, Mevan Siriwardane, Mary D Ellenburg, Manasi Vadhavkar, Christopher R Bergman, Justin M Saul, Seth Tomblyn, Luke Burnett, George J Christ
Wounds to the head, neck, and extremities have been estimated to account for ∼84% of reported combat injuries to military personnel. Volumetric muscle loss (VML), defined as skeletal muscle injuries in which tissue loss results in permanent functional impairment, is common among these injuries. The present standard of care entails the use of muscle flap transfers, which suffer from the need for additional surgery when using autografts or the risk of rejection when cadaveric grafts are used. Tissue engineering (TE) strategies for skeletal muscle repair have been investigated as a means to overcome current therapeutic limitations...
April 14, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28134037/destiny-rides-again-the-reappearance-of-silicone-gel-filled-breast-implant-toxicity
#20
A E Brawer
Background Twenty-five years ago attorneys representing ailing women in class action litigation against silicone breast implant manufacturers made the procedural error of defining silicone-induced toxicity in the courtroom before it was properly studied in the exam room. This aberrant methodology perverted the proper research process, rendered verification of any real disease elusive, and cemented the groundwork for a repeat public health crisis potentially affecting two million women in the USA who possess new silicone gel devices inserted over the past 10 years...
January 1, 2017: Lupus
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