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https://www.readbyqxmd.com/read/28453901/quasi-static-acoustic-tweezing-thromboelastometry
#1
R G Holt, D Luo, N Gruver, D B Khismatullin
BACKGROUND: Thromboelastography is widely used as a tool to assess the coagulation status of surgical patients. It allows observation of changes in material properties of whole blood, beginning with early stages of clot formation and ending with clot lysis. However, the contact activation of the coagulation cascade at surfaces of thromboelastographic systems leads to inherent variability and unreliability in predicting bleeding or thrombosis risks. OBJECTIVES: To develop acoustic tweezing thromboelastometry as a noncontact method for perioperative assessment of blood coagulation...
April 28, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28453433/diagnostic-accuracy-of-selective-3-t-mr-neurography-guided-retroperitoneal-genitofemoral-nerve-blocks-for-the-diagnosis-of-genitofemoral-neuralgia
#2
Jan Fritz, A Lee Dellon, Eric H Williams, Gedge D Rosson, Allan J Belzberg, Frederick E Eckhauser
Purpose To determine if 3-T magnetic resonance (MR) neurography-guided retroperitoneal genitofemoral nerve (GFN) blocks are safe and effective for the diagnosis of genitofemoral neuralgia. Materials and Methods Following institutional review board approval and informed consent, 26 subjects (16 men, 10 women; mean age, 42 years [range, 24-78 years]; mean body mass index, 28 kg/m(2) [range, 20-35 kg/m(2)]) with intractable groin pain were included. By using a 3-T MR imaging system, intermediate-weighted turbo spin-echo pulse sequences, and MR-conditional needles, diagnostic MR neurography-guided GFN blocks were performed in the retroperitoneum...
April 28, 2017: Radiology
https://www.readbyqxmd.com/read/28449254/bioresorbable-fe-mn-and-fe-mn-ha-materials-for-orthopedic-implantation-enhancing-degradation-through-porosity-control
#3
Michael Heiden, Eric Nauman, Lia Stanciu
Resorbable, porous iron-manganese-hydroxyapatite biocomposites with suitable degradation rates for orthopedic applications are prepared using salt-leaching for the first time. These transient biomaterials have the potential to replace inert, permanent implants that can suffer from long-term complications, or have to be surgically removed, leaving an unfavorable void. Fe30Mn-10HA materials are newly developed to address inadequate resorption rates of degradable materials proposed for orthopedic environments in the past...
April 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28449169/analysis-of-liver-tumors-using-preoperative-and-intraoperative-contrast-enhanced-ultrasound-ceus-ioceus-by-radiologists-in-comparison-to-magnetic%C3%A2-resonance-imaging-and-histopathology
#4
Severin Huf, Natascha Platz Batista da Silva, Isabel Wiesinger, Matthias Hornung, Marcus N Scherer, Sven Lang, Christian Stroszczynski, Thomas Fischer, Ernst Michael Jung
Purpose To evaluate the diagnostic significance of preoperatively and intraoperatively performed contrast-enhanced ultrasound (CEUS/IOCEUS) in the diagnosis of liver tumors in comparison to magnetic resonance imaging (MRI) and histopathology. Materials and Methods Retrospective analysis of 70/317 patients who underwent surgery for liver tumors between January 2012 and October 2015. Findings of CEUS and IOCEUS were compared to MRI. CEUS and IOCEUS were performed using multifrequency linear probes (1 - 5, 6 - 15 MHz) after bolus injection of 1 - 5 ml sulfur hexafluoride microbubbles...
May 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28448921/novel-bone-surrogates-for-cranial-surgery-training
#5
Marianne Hollensteiner, David Fürst, Benjamin Esterer, Peter Augat, Falk Schrödl, Stefan Hunger, Michael Malek, Daniel Stephan, Andreas Schrempf
Parietal graft lifts are trained on human or animal specimens or are directly performed on patients without extensive training. In order to prevent harm to the patient resulting from fast rotating machinery tools, the surgeon needs to apply appropriate forces. Realistic haptics are essential to identify the varying parietal bone layers and to avoid a penetration of the brain. This however, requires experience and training. Therefore, in this study, bone surrogate materials were evaluated with the aim to provide an anatomically correct artificial skull cap with realistic haptic feedback for graft lift training procedures...
April 19, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28448270/a-new-in-vitro-spine-test-rig-to-track-multiple-vertebral-motions-under-physiological-conditions
#6
Agnes Beckmann, Christian Herren, Marion Mundt, Jan Siewe, Philipp Kobbe, Rolf Sobottke, Hans-Christoph Pape, Marcus Stoffel, Bernd Markert
In vitro pure moment spine tests are commonly used to analyse surgical implants in cadaveric models. Most of the tests are performed at room temperature. However, some new dynamic instrumentation devices and soft tissues show temperature-dependent material properties. Therefore, the aim of this study is to develop a new test rig, which allows applying pure moments on lumbar spine specimens in a vapour-filled chamber at body temperature. As no direct sight is given in the vapour-filled closed chamber, a magnetic tracking (MT) system with implantable receivers was used...
April 27, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28445683/impact-of-preoperative-breast-mr-imaging-and-mr-guided-surgery-on-diagnosis-and-surgical-outcome-of-women-with-invasive-breast-cancer-with-and-without-dcis-component
#7
Christiane K Kuhl, Kevin Strobel, Heribert Bieling, Eva Wardelmann, Walther Kuhn, Nikolaus Maass, Simone Schrading
Purpose To (a) compare the diagnostic accuracy of breast magnetic resonance (MR) imaging with that of conventional imaging (digital mammography and breast ultrasonography) in the identification of ductal carcinoma in situ (DCIS) components of biopsy-proven invasive breast cancer before surgery and (b) investigate the surgical outcome (positive margin rates and mastectomy rates) of women with breast cancer who underwent preoperative MR imaging combined with MR-guided needle biopsy and/or MR-guided lesion localization or bracketing where appropriate...
April 26, 2017: Radiology
https://www.readbyqxmd.com/read/28444838/modified-brow-suspension-technique-for-the-treatment-of-pseudoptosis-due-to-redundant-frontal-skin-in-the-dog-a-retrospective-study-of-25-cases
#8
Martí Cairó, Marta Leiva, Daniel Costa, Maria Teresa Peña
PURPOSE: To describe the outcome of modified brow suspension technique for the treatment of upper eyelid pseudoptosis in canine patients with redundant frontal skin folds. METHODS: Medical records from 1999 to 2015 were retrospectively reviewed. Only dogs that underwent modified brow suspension for treating bilateral pseudoptosis were included in the study. Recorded data included breed, age, gender, main ophthalmic complaint, ocular findings, suture material used for brow suspension, number of slings placed, postoperative treatment, complications, follow-up time, and outcome...
April 25, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28439749/slippage-a-significant-problem-following-gastric-banding-a-single-centre-experience
#9
Tomasz Szewczyk, Przemyslaw Janczak, Natalia Jezierska, Piotr Jurałowicz
BACKGROUND: Laparoscopic adjustable gastric banding is a well-established method of morbid obesity treatment. One of the complications is slippage. AIM: The aim of the study was to assess the prevalence, causes, and handling of slippage after LAGB in own material. MATERIAL AND METHODS: There were 740 procedures performed by one surgical team. The patients were selected according to the IFSO principles. The pars flaccida technique was applied and the position of the band was controlled...
April 24, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28439164/use-of-t-m-j-disc-as-a-soft-tissue-interpositional-graft-material-for-functional-rehabilitation-of-ankylosed-t-m-joint
#10
Ravinder Singh Bedi, Upasana Khemka, Jaipal Singh, Manoj Yadav, Pratibha Singh
INTRODUCTION: Many surgical techniques have been described for the treatment of TMJ ankylosis, but no strategy has been uniformly agreed upon underscoring the difficulty of the problem. Despite new guidelines and updated methods, treating patients with TMJ Ankylosis remains a challenge as the incidence of recurrence after treatment is soaring. This study exemplifies our experience in using an unsullied method to treat TMJ Ankylosis to restore the structure of TMJ in conjunction with convalescing secondary maxillofacial deformity...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28439160/ranula-decompression-using-stitch-and-stab-method-the-aluko-technique
#11
Bayo Aluko-Olokun, Ademola Abayomi Olaitan
BACKGROUND: A ranula is a cystic lesion in the floor of the mouth, formed either as a retention cyst or pseudocyst as a result of extravasation of mucus in the surrounding tissue. It may be treated by micro-marsupialization, marsupialization or excision of lesion with or without the associated salivary gland. Marsupialization is usually achieved by cutting a slit and thereafter stitching the edges such that the epithelium of the exterior becomes continuous with that of the interior of a cyst...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28438070/creation-of-a-novel-simulator-for-minimally-invasive-neurosurgery-fusion-of-3d-printing-and-special-effects
#12
Peter Weinstock, Roberta Rehder, Sanjay P Prabhu, Peter W Forbes, Christopher J Roussin, Alan R Cohen
OBJECTIVE Recent advances in optics and miniaturization have enabled the development of a growing number of minimally invasive procedures, yet innovative training methods for the use of these techniques remain lacking. Conventional teaching models, including cadavers and physical trainers as well as virtual reality platforms, are often expensive and ineffective. Newly developed 3D printing technologies can recreate patient-specific anatomy, but the stiffness of the materials limits fidelity to real-life surgical situations...
April 25, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28437133/the-impact-of-the-centrifuge-characteristics-and-centrifugation-protocols-on-the-cells-growth-factors-and-fibrin-architecture-of-a-leukocyte-and-platelet-rich-fibrin-l-prf-clot-and-membrane
#13
David M Dohan Ehrenfest, Nelson R Pinto, Andrea Pereda, Paula Jiménez, Marco Del Corso, Byung-Soo Kang, Mauricio Nally, Nicole Lanata, Hom-Lay Wang, Marc Quirynen
L-PRF (leukocyte- and platelet-rich fibrin) is one of the four families of platelet concentrates for surgical use and is widely used in oral and maxillofacial regenerative therapies. The first objective of this article was to evaluate the mechanical vibrations appearing during centrifugation in four models of commercially available table-top centrifuges used to produce L-PRF and the impact of the centrifuge characteristics on the cell and fibrin architecture of a L-PRF clot and membrane. The second objective of this article was to evaluate how changing some parameters of the L-PRF protocol may influence its biological signature, independently from the characteristics of the centrifuge...
April 24, 2017: Platelets
https://www.readbyqxmd.com/read/28437003/high-intensity-focused-ultrasound-for-the-treatment-of-adenomyosis-selection-criteria-efficacy-safety-and-fertility
#14
Lian Zhang, Fangwen Rao, Raymond Setzen
Adenomyosis is a disorder of uterus in which endometrial glands and stroma are present within the uterine musculature. The main clinical manifestations are dysmenorrhea and menorrhagia. Adenomyosis has a great impact on both the quality of life and fertility of women. The treatment of adenomyosis remains an immense challenge MATERIAL AND METHODS: Relevant articles were searched through MEDLINE, Pubmed between 2000 and March 2017. The search terms of adenomyosis, magnetic resonance imaging (MRI) features of adenomyosis, high intensity focused ultrasound (HIFU), Ultrasound-guided HIFU and MRgFUS were used...
April 24, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28434012/clinical-importance-of-somatostatin-receptor-2-sstr2-and-somatostatin-receptor-5-sstr5-expression-in-thyrotropin-producing-pituitary-adenoma-tshoma
#15
Benxia Yu, Zhongsheng Zhang, Hao Song, Yuchun Chi, Chunling Shi, Miao Xu
BACKGROUND Thyrotropin-secreting pituitary adenomas (TSHomas) are a rare cause of hyperthyroidism. Somatostatin analogs have proved to be effective for inhibiting pituitary hormones secretion, working via interactions with somatostatin receptors (SSTRs). Moreover, antiproliferative activity of somatostatin analog is now demonstrated in several studies. In the present study, we determined the relative predominance of SSTR2 and SSTR5 subtypes among the different types of adenomas, especially TSHoma, and investigated the relationship between efficacy of short-term octreotide (OCT) treatment and SSTR expression...
April 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28432852/correlation-between-expression-of-high-temperature-requirement-serine-protease-a1-htra1-in-nucleus-pulposus-and-t2-value-of-magnetic-resonance-imaging
#16
Dapeng Li, Jiawei Yue, Lu Jiang, Yonghui Huang, Jifu Sun, Yan Wu
BACKGROUND Degrading enzymes play an important role in the process of disc degeneration. The objective of this study was to investigate the correlation between the expression of high temperature requirement serine protease A1 (HtrA1) in the nucleus pulposus and the T2 value of the nucleus pulposus region in magnetic resonance imaging (MRI). MATERIAL AND METHODS Thirty-six patients who had undergone surgical excision of the nucleus pulposus were examined by MRI before surgery. Pfirrmann grading of the target intervertebral disc was performed according to the sagittal T2-weighted imaging, and the T2 value of the target nucleus pulposus was measured according to the median sagittal T2 mapping...
April 22, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28431732/retrograde-pulmonary-embolectomy-for-acute-pulmonary-embolism-a-simplified-technique
#17
Syed T Hussain, John R Bartholomew, Marzia Leacche, Michael Zhen-Yu Tong
Surgical embolectomy in acute pulmonary embolism is usually reserved for patients with massive pulmonary embolism presenting with cardiogenic shock, or for whom thrombolysis is absolutely contraindicated or has failed. Incomplete removal of thrombotic material lodged in the distal pulmonary arterial bed is considered an important cause of persistent pulmonary hypertension. Retrograde pulmonary embolectomy is an adjunct to conventional pulmonary embolectomy, resulting in more complete embolectomy, specifically of material lodged in the distal pulmonary arterial bed...
May 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28431477/duration-of-orthognathic-surgical-treatment
#18
Jaakko Paunonen, Mika Helminen, Timo Peltomäki
OBJECTIVE: The objective of this study was to determine the duration of orthognathic-surgical treatment conducted with conventional pre- and post-surgical orthodontic treatment phases. MATERIAL AND METHODS: The study material was comprised of the files of 185 consecutive patients treated in Oral and Maxillofacial Unit, Tampere University Hospital, Finland, in 2007-2014. The files were reviewed and the following data was obtained: gender and age of patients, ICD-10 diagnosis, type of malocclusion, duration of pre- and post-surgical orthodontic treatment and type of operation...
April 21, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28430555/beyond-wires-and-seeds-reflector-guided-breast-lesion-localization-and-excision
#19
Victoria L Mango, Ralph T Wynn, Sheldon Feldman, Lauren Friedlander, Elise Desperito, Sejal N Patel, Ameer Gomberawalla, Richard Ha
Purpose To evaluate outcomes of Savi Scout (Cianna Medical, Aliso Viejo, Calif) reflector-guided localization and excision of breast lesions by analyzing reflector placement, localization, and removal, along with target excision and rates of repeat excision (referred to as re-excision). Materials and Methods A single-institution retrospective review of 100 women who underwent breast lesion localization and excision by using the Savi Scout surgical guidance system from June 2015 to May 2016 was performed. By using image guidance 0-8 days before surgery, 123 nonradioactive, infrared-activated, electromagnetic wave reflectors were percutaneously inserted adjacent to or within 111 breast targets...
April 21, 2017: Radiology
https://www.readbyqxmd.com/read/28430293/three-cases-of-ectopic-sphenoid-sinus-pituitary-adenoma
#20
Ernest Jan Bobeff, Karol Wiśniewski, Wielisław Papierz, Ludomir Stefańczyk, Dariusz Jan Jaskólski
<i><b>Introduction</b>: Ectopic sphenoid sinus pituitary adenoma is a rare tumour originating from embryologic remnants of Rathke's pouch. Although it is considered a clinically benign neoplasm, necrosis is encountered in 25% of cases and it can invade adjacent bone structures. <b>Aims</b>: To establish clinical, radiological and histopathological features of ectopic sphenoid sinus pituitary adenoma. <b>Material and methods: </b> Analysis of three cases: two females and one man, aged 61-70...
2017: Folia Neuropathologica
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