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https://www.readbyqxmd.com/read/28072656/isosorbide-induced-decompression-effect-on-the-scala-media-participation-of-plasma-osmolality-and-plasma-arginine-vasopressin
#1
Taizo Takeda, Setsuko Takeda, Natsumi Uehara, Shungaku Yanagisawa, Tatsuya Furukawa, Ken-Ichi Nibu, Akinobu Kakigi
OBJECTIVE: The correlation between the isosorbide-induced decompression effect on the endolymphatic space and plasma osmolality (p-OSM) or plasma arginine vasopressin (p-AVP) was investigated on comparing two different dosages of isosorbide (2.8 and 1.4 g/kg) to elucidate why the decompression effect is delayed with a large dose of isosorbide. MATERIALS AND METHODS: Two experiments were performed using 80 guinea pigs. Experiment 1 was designed to morphologically investigate the sequential influence of the oral intake of 1...
January 9, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28060071/corneal-lenticule-allotransplantation-after-femtosecond-laser-small-incision-lenticule-extraction-in-rabbits
#2
Jing Zhao, Yang Shen, Mi Tian, Ling Sun, Yu Zhao, Xiaoyu Zhang, Xingtao Zhou
PURPOSE: To investigate the feasibility of allotransplanting extracted lenticules after femtosecond laser-assisted small incision lenticule extraction (SMILE) in rabbits and the subsequent healing process. METHODS: Fourteen New Zealand white rabbits were divided evenly into 2 groups. The rabbits in group A received SMILE procedures with a -6.00 D correction. The lenticules from group A were immediately inserted into a femtosecond laser-created corneal stromal pocket in group B...
February 2017: Cornea
https://www.readbyqxmd.com/read/28057033/reducing-the-risk-of-impaired-bone-apposition-to-titanium-screws-with-the-use-of-fibroblast-growth-factor-2-apatite-composite-layer-coating
#3
Kengo Fujii, Atsuo Ito, Hirotaka Mutsuzaki, Shinji Murai, Yu Sogo, Yuki Hara, Masashi Yamazaki
BACKGROUND: Loosening of screws is a common problem in orthopedic and maxillofacial surgery. Modifying the implant surface to improve the mechanical strength of screws has been tried and reported. We developed screws coated with fibroblast growth factor-2 (FGF-2)-apatite composite layers. We then showed, in a percutaneous external fixation model, that this composite layer had the ability to hold and release FGF-2 slowly, thereby reducing the risk of pin tract infection of the percutaneous external fixation...
January 5, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28055036/preparation-and-implementation-of-optofluidic-neural-probes-for-in-vivo-wireless-pharmacology-and-optogenetics
#4
Jordan G McCall, Raza Qazi, Gunchul Shin, Shuo Li, Muhammad Hamza Ikram, Kyung-In Jang, Yuhao Liu, Ream Al-Hasani, Michael R Bruchas, Jae-Woong Jeong, John A Rogers
This Protocol Extension describes the fabrication and technical procedures for implementing ultrathin, flexible optofluidic neural probe systems that provide targeted, wireless delivery of fluids and light into the brains of awake, freely behaving animals. As a Protocol Extension article, this article describes an adaptation of an existing Protocol that offers additional applications. This protocol serves as an extension of an existing Nature Protocol describing optoelectronic devices for studying intact neural systems...
February 2017: Nature Protocols
https://www.readbyqxmd.com/read/27994977/blood-circulation-in-the-ascidian-tunicate-corella-inflata-corellidae
#5
Michael W Konrad
The body of the ascidian tunicate Corella inflata is relatively transparent. Thus, the circulatory system can be visualized by injecting high molecular weight fluorescein labeled dextran into the heart or the large vessels at the ends of the heart without surgery to remove the body wall. In addition, after staining with neutral red, the movement of blood cells can be easily followed to further characterize the circulatory system. The heart is two gently curved concentric tubes extending across the width of the animal...
2016: PeerJ
https://www.readbyqxmd.com/read/27987599/a-preclinical-animal-study-of-a-novel-simple-and-secure-percutaneous-vessel-occluder-for-the-treatment-of-varicose%C3%A2-veins
#6
Arnold Miller, Nir Lilach, Raanan Miller, Lowell Kabnick
BACKGROUND: Secure, permanent occlusion of the great and small saphenous veins, their tributaries, and perforators is critical for the successful treatment of varicose veins. Current minimally invasive methods replacing surgery are all endoluminal and involve heat (radiofrequency or laser), chemicals (sclerosants and glues), or a combination of mechanical and chemical interventions. This study evaluated in a porcine model the performance of a percutaneous delivery of the Amsel Vessel Occluder (AVO; Amsel Medical Corp, Cambridge, Mass) using ultrasound guidance...
January 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/27984781/simvastatin-augments-revascularization-and-reperfusion-in-a-murine-model-of-hind-limb-ischemia-multimodal-imaging-assessment
#7
Julian Luke Goggi, Michael Ng, Nalini Shenoy, Ramasamy Boominathan, Peter Cheng, Sakthivel Sekar, Kishore Kumar Bhakoo
INTRODUCTION: Peripheral artery disease can lead to severe disability and limb loss. Therapeutic strategies focussing on macrovascular repair have shown benefit but have not significantly reduced amputation rates in progressive PAD. Proangiogenic small molecule therapies may substantially improve vascularisation in limb ischemia. The purpose of the current study was to assess the proangiogenic effects of simvastatin in a murine model of hind limb ischemia using longitudinal multimodal imaging...
November 17, 2016: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/27979758/a-testbed-for-optimizing-electrodes-embedded-in-the-skull-or-in-artificial-skull-replacement-pieces-used-after-injury
#8
JingLe Jiang, Amar R Marathe, Jennifer C Keene, Dawn M Taylor
BACKGROUND: Custom-fitted skull replacement pieces are often used after a head injury or surgery to replace damaged bone. Chronic brain recordings are beneficial after injury/surgery for monitoring brain health and seizure development. Embedding electrodes directly in these artificial skull replacement pieces would be a novel, low-risk way to perform chronic brain monitoring in these patients. Similarly, embedding electrodes directly in healthy skull would be a viable minimally-invasive option for many other neuroscience and neurotechnology applications requiring chronic brain recordings...
December 12, 2016: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/27958227/establishment-of-a-novel-mouse-model-of-coronary-microembolization
#9
Yuan-Yuan Cao, Zhang-Wei Chen, Jian-Guo Jia, Ao Chen, You Zhou, Yong Ye, Yan-Hua Gao, Yan Xia, Shu-Fu Chang, Jian-Ying Ma, Ju-Ying Qian, Jun-Bo Ge
BACKGROUND: Coronary microembolization (CME) has been frequently seen in acute coronary syndromes and percutaneous coronary intervention. Small animal models are required for further studies of CME related to severe prognosis. This study aimed to explore a new mouse model of CME. METHODS: The mouse model of CME was established by injecting polystyrene microspheres into the left ventricular chamber during 15-s occlusion of the ascending aorta. Based on the average diameter and dosage used, 30 C57BL/6 male mice were randomly divided into five groups (n = 6 in each): 9 μm/500,000, 9 μm/800,000, 17 μm/200,000, 17 μm/500,000, and sham groups...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27956071/solution-blow-spun-polymer-a-novel-preclinical-surgical-sealant-for-bowel-anastomoses
#10
Nora G Kern, Adam M Behrens, Priya Srinivasan, Christopher T Rossi, John L Daristotle, Peter Kofinas, Anthony D Sandler
BACKGROUND: Solution blow spinning is a technique for depositing polymer fibers with promising potential use as a surgical sealant. This study assessed the feasibility and efficacy of solution blow spun polymer (BSP) for sealing bowel perforations in a mouse model of partial cecal transection. We then evaluated its use for reinforcing a surgical anastomosis in a preclinical piglet model. METHODS: Three commercially available surgical sealants (fibrin glue, polyethylene glycol (PEG) hydrogel, and cyanoacrylate) were compared to BSP in the ability to seal partially transected cecum in mice...
December 5, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27935666/comparison-of-transverse-computed-tomographic-excretory-urography-images-and-maximum-intensity-projection-images-for-diagnosing-ectopic-ureters-in-dogs
#11
Scott Secrest, Andrew Bugbee, Kenneth Waller, David A Jiménez
Computed tomographic maximum intensity projection (MIP) images have been shown to improve reader confidence in their diagnoses and to improve detection of vascular structures and pulmonary nodules. The objectives of this method comparison study were to compare transverse source computed tomographic excretory urography (CTEU) images to two, five, and 10 slab thick MIP images for diagnosing canine ectopic ureters, compare reader confidence, and evaluate interobserver agreement. Two board-certified veterinary radiologists and a board-certified small animal internist blindly reviewed transverse source CTEU and two, five, and 10 slab thick MIP images of 24 dogs enrolled in the study...
December 9, 2016: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/27935100/precise-injection-of-human-mesenchymal-stromal-cells-in-the-urethral-sphincter-complex-of-g%C3%A3-ttingen-minipigs-without-unspecific-bulking-effects
#12
Bastian Amend, Alexandra Kelp, Martin Vaegler, Mario Klünder, Viktoria Frajs, Gerd Klein, Karl-Dietrich Sievert, Oliver Sawodny, Arnulf Stenzl, Wilhelm K Aicher
AIM: To investigate if injection of cells in the urethral sphincter complex causes unspecific bulking effects. METHODS: Human mesenchymal stromal cells were isolated, expanded, and characterized. For transurethral injection, cells were labeled with the fluorescent dye PKH26 and in magnetic resonance imaging associated experiments with superparamagnetic particles. Aliquots of cells in 250 µL solvent were injected under vision in the urethral sphincter of immuno-suppressed Göttingen minipigs...
December 9, 2016: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/27922979/a-comparison-of-thermal-plasma-energy-versus-argon-beam-coagulator-induced-intestinal-injury-after-vaporization-in-a-porcine-model
#13
Edward J Tanner, Erica Dun, Yukio Sonoda, Alexander B Olawaiye, Dennis S Chi
OBJECTIVES: Complete cytoreduction of ovarian cancer often requires excision or ablation of bowel serosa implants. Both argon beam coagulator (ABC) and thermal plasma energy (TPE) (PlasmaJet; PlasmaSurgical, Roswell, Ga) have been used to ablate bowel serosa implants. Our objective was to identify comparable power settings as well as determine the rate of bowel perforation, depth of thermal injury, and extent of inflammatory response with ABC versus TPE in a porcine model. MATERIALS AND METHODS: Nine pigs underwent vaporization of small bowel and colon serosa according to assigned treatment group (TPE vs ABC) and settings (ABC: 30, 50, and 70 W; TPE: Cut 10U, 20U, and 30U and Coagulation 10U, 20U, and 30U)...
January 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/27901096/image-based-in-vivo-assessment-of-targeting-accuracy-of-stereotactic-brain-surgery-in-experimental-rodent-models
#14
Janaki Raman Rangarajan, Greetje Vande Velde, Friso van Gent, Philippe De Vloo, Tom Dresselaers, Maarten Depypere, Kris van Kuyck, Bart Nuttin, Uwe Himmelreich, Frederik Maes
Stereotactic neurosurgery is used in pre-clinical research of neurological and psychiatric disorders in experimental rat and mouse models to engraft a needle or electrode at a pre-defined location in the brain. However, inaccurate targeting may confound the results of such experiments. In contrast to the clinical practice, inaccurate targeting in rodents remains usually unnoticed until assessed by ex vivo end-point histology. We here propose a workflow for in vivo assessment of stereotactic targeting accuracy in small animal studies based on multi-modal post-operative imaging...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27882211/novel-perspectives-on-the-role-of-the-human-microbiota-in-regenerative-medicine-and-surgery
#15
Tommaso Pellegatta, Marco Saler, Viola Bonfanti, Giovanni Nicoletti, Angela Faga
Plastic surgery is transitioning from a fine craftsmanship to a regenerative science. In wound healing, the role of microorganisms is no longer considered to be just counteracting, but also promoting. Furthermore, host-microbe interactions are essential for numerous aspects of normal mammalian physiology, from metabolic activity to immune homeostasis. Each area of the human body hosts a unique microbial community, and the composition of microbiota is dependent on the host, age and the anatomical area, and it changes according to the characteristics of the microenvironment...
November 2016: Biomedical Reports
https://www.readbyqxmd.com/read/27881956/ovarian-sex-hormones-modulate-compulsive-affective-and-cognitive-functions-in-a-non-induced-mouse-model-of-obsessive-compulsive-disorder
#16
Swarup Mitra, Cristiane P Bastos, Katherine Bates, Grace S Pereira, Abel Bult-Ito
There is currently a lack of understanding of how surgical menopause can influence obsessions, compulsions and associated affective and cognitive functions in female obsessive-compulsive disorder (OCD) patients. Early menopause in women due to surgical removal of ovaries not only causes dramatic hormonal changes, but also may induce affective and cognitive disorders. Here, we tested if surgical removal of ovaries (ovariectomy, OVX), which mimics surgical menopause in humans, would result in exacerbation of compulsive, affective and cognitive behaviors in mice strains that exhibit a spontaneous compulsive-like phenotype...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27875509/osseous-repair-in-minimally-invasive-reconstruction-of-anterior-skull-base-defects
#17
Vijay R Ramakrishnan, Adam M Terella, Seerat Poonia, Alexander G Chiu, James N Palmer
Management of anterior skull base defects is an area of continued innovation for skull base surgeons. Various grafting materials have been advocated for the repair of skull base defects depending on needs, availability, harvest site morbidity, and surgeon preference. Spontaneous bony closure of small skull defects is known to occur in animal models without bone grafts, but this phenomenon has been unexplored in the human skull base. The objective of this study was to evaluate osseous skull base closure in patients undergoing endoscopic repair of skull base defects...
January 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27872724/are-magnetic-resonance-imaging-or-radiographic-findings-correlated-with-clinical-prognosis-in-spinal-cord-neuropathy
#18
Fatemeh Neshat Halati, Alireza Vajhi, Mohammad Molazem, Mohammad Mehdi Dehghan, Fereshteh Ansari
Dogs presented to the Small Animal Hospital of Veterinary Medicine, University of Tehran were included in the present study if spinal or intervertebral disc involvement was suspected. Clinical signs were recorded as well as general information of the patient such as age, breed and sex. Sixty dogs were examined radiographically and two standard orthogonal lateral and ventrodorsal projections were taken from the suspected region. Then magnetic resonance imaging (MRI) was performed for all patients. Agreement between MRI and radiographic findings, comparison of sex and breed with diagnostic imaging grades, comparison between diagnostic imaging grades and mean age, recovery rate after surgery or medical treatment, effects of diagnostic imaging severity grades on surgical or medical referrals were evaluated statistically...
2016: Veterinary Research Forum
https://www.readbyqxmd.com/read/27856964/neonatal-satellite-cells-form-small-myotubes-in-vitro
#19
P L Carvajal Monroy, S Grefte, A M Kuijpers-Jagtman, J W Von den Hoff, F A D T G Wagener
Although palatal muscle reconstruction in patients with cleft palate takes place during early childhood, normal speech development is often not achieved. We hypothesized that the intrinsic properties of head satellite cells (SCs) and the young age of these patients contribute to the poor muscle regeneration after surgery. First, we studied the fiber type distribution and the expression of SC markers in ex vivo muscle tissue from head (branchiomeric) and limb (somite-derived) muscles from neonatal (2-wk-old) and young (9-wk-old) rats...
November 16, 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27842504/epcam-as-multi-tumour-target-for-near-infrared-fluorescence-guided-surgery
#20
P B A A van Driel, M C Boonstra, H A J M Prevoo, M van de Giessen, T J A Snoeks, Q R J G Tummers, S Keereweer, R A Cordfunke, A Fish, J D H van Eendenburg, B P F Lelieveldt, J Dijkstra, C J H van de Velde, P J K Kuppen, A L Vahrmeijer, C W G M Löwik, C F M Sier
BACKGROUND: Evaluation of resection margins during cancer surgery can be challenging, often resulting in incomplete tumour removal. Fluorescence-guided surgery (FGS) aims to aid the surgeon to visualize tumours and resection margins during surgery. FGS relies on a clinically applicable imaging system in combination with a specific tumour-targeting contrast agent. In this study EpCAM (epithelial cell adhesion molecule) is evaluated as target for FGS in combination with the novel Artemis imaging system...
November 14, 2016: BMC Cancer
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