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https://www.readbyqxmd.com/read/28350858/in-vivo-measured-joint-friction-in-hip-implants-during-walking-after-a-short-rest
#1
Philipp Damm, Alwina Bender, Georg Duda, Georg Bergmann
INTRODUCTION: It has been suspected that friction in hip implants is higher when walking is initiated after a resting period than during continuous movement. It cannot be excluded that such increased initial moments endanger the cup fixation in the acetabulum, overstress the taper connections in the implant or increase wear. To assess these risks, the contact forces, friction moments and friction coefficients in the joint were measured in vivo in ten subjects. Instrumented hip joint implants with telemetric data transmission were used to access the contact loads between the cup and head during the first steps of walking after a short rest...
2017: PloS One
https://www.readbyqxmd.com/read/28346006/magnetic-resonance-imaging-susceptibility-artifacts-in-the-cervical-vertebrae-and-spinal-cord-related-to-monocortical-screw-polymethylmethacrylate-implants-in-canine-cadavers
#2
Brian G Jones, Geoffrey T Fosgate, Eric M Green, Amy M Habing, Bianca F Hettlich
OBJECTIVE To characterize and compare MRI susceptibility artifacts related to titanium and stainless steel monocortical screws in the cervical vertebrae and spinal cord of canine cadavers. SAMPLE 12 canine cadavers. PROCEDURES Cervical vertebrae (C4 and C5) were surgically stabilized with titanium or stainless steel monocortical screws and polymethylmethacrylate. Routine T1-weighted, T2-weighted, and short tau inversion recovery sequences were performed at 3.0 T. Magnetic susceptibility artifacts in 20 regions of interest (ROIs) across 4 contiguous vertebrae (C3 through C6) were scored by use of an established scoring system...
April 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28343026/comparison-of-unilateral-versus-bilateral-pedicle-screw-fixation-at-the-level-of-fracture-using-posterior-short-segment-pedicle-instrumentation-in-the-treatment-of-severe-thoracolumbar-burst-fractures
#3
Chao Sun, Xinhui Liu, Jiwei Tian, Guoping Guan, Hailong Zhang
BACKGROUND: Thoracolumbar burst fractures (TBFs) are often followed by bilateral pedicle screw fixation (BPSF) at the level of fracture using posterior short-segment pedicle instrumentation (SSPI). There has been increasing support for unilateral pedicle screw fixation (UPSF) in an attempt to reduce complications and costs. The aim of this study was to compare the clinical and radiologic results of UPSF versus BPSF at the level of fracture using SSPI in the treatment of severe TBFs. METHODS: The records of 42 consecutive patients with severe TBFs who underwent SSPI were divided into 2 groups according to the number of screws in the fracture level, including 20 patients (five screws) in UPSF group and 22 patients (six screws) in BPSF...
March 22, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28342523/early-experience-with-a-modified-preloaded-system-for-fenestrated-endovascular-aortic-repair
#4
Blandine Maurel, Tim Resch, Rafaelle Spear, Blayne Roeder, Umberto M Bracale, Stephan Haulon, Tara M Mastracci
OBJECTIVE: Preloaded endovascular delivery systems expand the anatomic eligibility for complex aortic repair by requiring only one iliac access vessel and providing a stable platform for guiding sheaths into challenging target vessels. This article reports the lessons learned and early clinical outcomes using a modified preloaded delivery system for fenestrated endovascular aneurysm repair (FEVAR) in three aortic centers in Europe. METHODS: From October 2015 to March 2016, consecutive patients presenting with extensive aortic aneurysm treated with a modified preloaded FEVAR were prospectively enrolled from three high volume European aortic centers...
April 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28341373/drugs-to-prevent-sudden-cardiac-death
#5
Julia W Erath, Stefan H Hohnloser
Sudden cardiac death (SCD) remains a major public health burden despite enormous advances in post-resuscitation care, management of structural heart diseases, and antiarrhythmic treatment modalities. Primary and secondary prevention of sudden cardiac death require understanding of the underlying substrate causing ventricular arrhythmias and its modification by pharmacological (i.e. heart failure therapy) or interventional (catheter ablation) methods. Antiarrhythmic drug therapy has experienced ups and downs during the last 30years balancing high antiarrhythmic potential, toxic side effects and pro-arrhythmic potency...
March 18, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28340840/short-term-results-of-heartmate-3-ventricular-assist-device-implantation-for-end-stage-heart-failure
#6
P Ozturk, S Ertugay, C Sahutoglu, C Engin, S Nalbantgil, T Yagdi, M Ozbaran
OBJECTIVE: To report our initial experience with Heartmate 3 ventricular assist device (HM3) in cases with end-stage heart failure (ESHF). METHODS: Charts of 8 ESHF patients who underwent HM3 implantation in our clinic from January to June 2016 (group 1) and 16 patients who underwent HM2 implantation during 2015 (group 2) were reviewed retrospectively. Demographics as well as pre- and early postoperative medical data were noted and statistically analyzed between the 2 groups...
April 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28339794/short-term-dabigatran-interruption-before-cardiac-rhythm-device-implantation-multi-centre-experience-from-the-re-ly-trial
#7
Vidal Essebag, Riccardo Proietti, David H Birnie, Jia Wang, James Douketis, Benoit Coutu, Ratika Parkash, Gregory Y H Lip, Stefan H Hohnloser, Andrew Moriarty, Jonas Oldgren, Stuart J Connolly, Michael Ezekowitz, Jeff S Healey
Aims: Cardiac implantable electronic device (CIED) surgery is commonly performed in patients with atrial fibrillation (AF). The current analysis was undertaken to compare peri-operative anticoagulation management, bleeding, and thrombotic events in AF patients treated with dabigatran vs. warfarin. Methods and results: This study included 611 patients treated with dabigatran vs. warfarin who underwent CIED surgery during the RE-LY trial. Among 201 warfarin-treated patients, warfarin was interrupted a median of 144 (inter-quartile range, IQR: 120-216) h, and 37 (18...
February 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28337820/selective-radiofrequency-stimulation-of-the-dorsal-root-ganglion-drg-as-a-method-for-predicting-targets-for-neuromodulation-in-patients-with-post-amputation-pain-a-case-series
#8
Corey W Hunter, Ajax Yang, Tim Davis
OBJECTIVE: While spinal cord stimulation (SCS) has established itself as an accepted and validated treatment for neuropathic pain, there are a number of conditions where it has experienced less, long-term success: post amputee pain (PAP) being one of them. Dorsal root ganglion (DRG) stimulation has shown great promise, particularly in conditions where traditional SCS has fallen short. One major difference between DRG stimulation and traditional SCS is the ability to provide focal stimulation over targeted areas...
March 23, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28336451/effect-of-soybean-phosphatidylcholine-on-lipid-profile-of-bovine-oocytes-matured-in-vitro
#9
Caroline P Pitangui-Molina, Alessandra A Vireque, Alessandra Tata, Katia Roberta A Belaz, Vanessa G Santos, Christina R Ferreira, Marcos N Eberlin, Marcos Felipe S Sá, Rui A Ferriani, Ana Carolina J S Rosa-E-Silva
The phospholipid (PL) composition of embryo and oocyte membranes affects thermal phase behavior and several physicochemical properties such as fluidity and permeability. The characterization of PL profiles and the development of suitable in vitro maturation (IVM) protocols, that are able to modify membrane's composition, may result in significant improvements in oocyte developmental potential and cryotolerance. Using soybean phosphatidylcholine (PC) as a model supplement, we evaluated the effect of PL supplementation during IVM on bovine cumulus-oocyte-complex (COC)...
March 20, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/28333220/implementation-of-an-integrated-biodimensional-method-of-breast-augmentation-with-anatomic-highly-cohesive-silicone-gel-implants-short-term-results-with-the-first-620-consecutive-cases
#10
Paolo Montemurro, Mouchammed Agko, Alessandro Quattrini Li, Stefano Avvedimento, Per Hedén
Background: The previously described Akademikliniken (AK) method is a comprehensive approach to breast augmentation with form stable implants that has been shown to afford favorable outcomes when applied by experienced surgeons. Objectives: To evaluate outcomes of a surgeon newly adopting this method at the beginning of his career. Methods: A retrospective review of patients undergoing dual plane subpectoral augmentation with Style 410 implants between April 2009 and December 2014 was undertaken...
February 20, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/28332286/analysis-of-risk-factors-for-cluster-behavior-of-dental-implant-failures
#11
Bruno Ramos Chrcanovic, Jenö Kisch, Tomas Albrektsson, Ann Wennerberg
BACKGROUND: Some studies indicated that implant failures are commonly concentrated in few patients. PURPOSE: To identify and analyze cluster behavior of dental implant failures among subjects of a retrospective study. MATERIALS AND METHODS: This retrospective study included patients receiving at least three implants only. Patients presenting at least three implant failures were classified as presenting a cluster behavior. Univariate and multivariate logistic regression models and generalized estimating equations analysis evaluated the effect of explanatory variables on the cluster behavior...
March 22, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28331113/transcatheter-aortic-valve-replacement-with-different-valve-types-in-elliptic-aortic-annuli
#12
Yoshio Maeno, Yigal Abramowitz, Sung-Han Yoon, Hasan Jilaihawi, Sharma Raul, Sharjeel Israr, Masaki Miyasaka, Hiroyuki Kawamori, Yoshio Kazuno, Tanya Rami, Nobuyuki Takahashi, Geeteshwar Mangat, Mohammad Kashif, Tarun Chakravarty, Mamoo Nakamura, Wen Cheng, Raj R Makkar
BACKGROUND: The aim of this study was to determine the influence of an elliptic annulus on acute device success rates following self-expanding (SE) transcatheter aortic valve replacement (TAVR) vs. balloon-expandable (BE) TAVR.Methods and Results:Outcomes were assessed using Valve Academic Research Consortium-2 definitions. Aortic annulus ratio (AAR) was measured as short axis diameter/long axis diameter. Mean AAR was 0.81±0.06. Patients were therefore divided into 2 groups: AAR <0...
March 23, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28329271/short-and-long-term-results-after-prosthetic-mitral-valve-implantation-in-patients-with-severe-mitral-annulus-calcification%C3%A2
#13
Ronny Ben-Avi, Boris Orlov, Leonid Sternik, Alexander Kogan, Rafael Kuperstien, Amjad Shalabi, Eilon Ram, Alexander Lipey, Ehud Raanani
OBJECTIVES: To investigate short- and long-term outcomes of a conservative decalcification approach in mitral valve replacement (MVR) surgery in the presence of mitral annulus calcification (MAC). METHODS: Of the 1038 patients who underwent MVR, 133 (13%) had significant MAC with at least 30% of the annular circumference heavily calcified. In most patients, the surgical approach to MAC included conservative decalcification, supra-annular prosthesis implantation and insertion of a pericardial patch between the MV annulus and the prosthesis...
March 1, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28328511/wireless-power-transfer-strategies-for-implantable-bioelectronics-methodological-review
#14
Kush Agarwal, Rangarajan Jegadeesan, Yong-Xin Guo, Nitish V Thakor
Neural implants have emerged over the last decade as highly effective solutions for the treatment of dysfunctions and disorders of the nervous system. These implants establish a direct, often bidirectional, interface to the nervous system, both sensing neural signals and providing therapeutic treatments. As a result of the technological progress and successful clinical demonstrations, completely implantable solutions have become a reality and are now commercially available for the treatment of various functional disorders...
March 16, 2017: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/28328497/synergistic-effects-of-nanodrug-ultrasound-hyperthermia-and-thermal-ablation-on-solid-tumors-an-animal-study
#15
Li-Chen Chiu, Sheng-Kai Wu, Win-Li Lin, Gin-Shin Chen
OBJECTIVE: Delivery barriers of nanodrug in large tumors due to heterogeneous blood supply, elevated interstitial pressure and long transport distances can degrade the efficacy of cancer treatment. In this study, we proposed a therapeutic strategy to improve the tumor growth inhibition by injecting pegylated liposomal doxorubicin (PLD), and then applying a short time of ultrasound hyperthermia (HT) on the entire solid tumor, and inflicting ultrasound thermal ablation (Ab) in the low-perfused tumor region...
March 17, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28323706/comparison-of-open-versus-percutaneous-pedicle-screw-fixation-using-the-sextant-system-in-the-treatment-of-traumatic-thoracolumbar-fractures
#16
Hongwei Wang, Yue Zhou, Changqing Li, Jun Liu, Liangbi Xiang
STUDY DESIGN: We retrospectively reviewed 100 patients who were posterior stabilized without graft fusion. Using the Sextant system, 22 patients underwent minimally invasive short-segment 4-pedicle screw fixation (MIF4) and 39 patients underwent minimally invasive short-segment combined with intermediate screws fixation, that is, 6-pedicle screw fixation (MIF6). The conventional open posterior short-segment 4-pedicle screw fixation (OPF4) technique was used in 39 patients. OBJECTIVE: To evaluate the feasibility, safety, and efficacy of percutaneous pedicle screw fixation using the Sextant system in the treatment of traumatic thoracolumbar fractures compared with the conventional open posterior short-segment pedicle screw fixation technique...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323247/changes-of-the-bone-structure-after-cap-resurfacing-arthroplasty-of-thehumeral-head
#17
Lars V von Engelhardt, Michael Hahn, Thorsten Schulz, Klaus Peikenkamp, Joerg Jerosch
INTRODUCTION: Although humeral head resurfacing with a cap is relatively common in clinical practice, clinical studies about the changes of the bone are rare. The aim of this study was to analyse qualitative and quantitative changes of the bone after cup arthroplasty. Our hypothesis is that the implant leads to a new functional load with remarkable changes of the bone underneath the cap. MATERIAL AND METHODS: Overall, 12 explanted caps with adherent bone tissues, retrieved at the revision surgery, were collected for histological examination...
March 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28321027/effects-of-long-acting-loop-diuretics-in-heart-failure-with-reduced-ejection-fraction-patients-with-cardiac-resynchronization-therapy
#18
Masahiko Asami, Jiro Aoki, Shuzou Tanimoto, Yu Horiuchi, Mika Watanabe, Koichi Furui, Kentaro Yasuhara, Tatsuyuki Sato, Kengo Tanabe, Kazuhiro Hara
There have been no reports evaluating the impact of long-acting loop diuretics (LLD) on the outcome of heart failure (HF) and arrhythmia treatment in HF with reduced ejection fraction (HFrEF) patients implanted with a cardiac resynchronization therapy (CRT) device.This was a prospective, single-blind, randomized crossover study. We allocated 21 consecutive CRT implanted patients into 2 groups. The furosemide group received furosemide as a first treatment and azosemide as a second treatment. The azosemide group received this treatment in the reverse order...
March 17, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28319524/combined-therapy-of-ventricular-assist-device-and-extracorporeal-membrane-oxygenation-for-profound-acute-cardiopulmonary-failure
#19
Kevin Fujita, Koji Takeda, Boyganzi Li, Christine Mauro, Paul Kurlansky, Sowmyashree Sreekanth, Jiho Han, Lauren K Truby, Reshad Garan, Veli Topkara, Melana Yuzefpolskaya, Paolo Colombo, Yoshifumi Naka, Hiroo Takayama
Short-term ventricular assist devices (ST-VAD) have been effective in treating patients with refractory cardiogenic shock. Membrane oxygenators (MO) can be added to the circuit for concomitant profound refractory hypoxia. This study reports outcomes of combined therapy in this portion of patients. This is a retrospective review of 166 patients who received an ST-biventricular assist device (BiVAD) or right ventricular assist device (RVAD) for cardiogenic shock between November 2007 and November 2014. An MO was added to the RVAD for profound hypoxia refractory to maximized ventilation...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28319212/treatment-outcomes-for-mandibular-mini-implant-retained-overdentures-a-systematic-review
#20
Jin-Hong Park, Jeong-Yol Lee, Sang-Wan Shin
PURPOSE: This systematic review evaluated treatment outcomes for mandibular mini-implant-retained overdentures (MMIOs) in terms of (1) implant survival rate, (2) peri-implant marginal bone loss, (3) prosthodontic maintenance and complication occurrence, and (4) patient satisfaction. MATERIALS AND METHODS: Pertinent literature published in English before October 12, 2015 was identified using a MEDLINE and EMBASE search strategy and hand searching of relevant journals...
March 20, 2017: International Journal of Prosthodontics
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