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https://www.readbyqxmd.com/read/28544843/a-new-sign-of-severe-aortic-regurgitation-detected-through-airflow-analysis-in-mechanical-ventilation
#1
Juan C Garcia-Rubira, Maria J Cristo-Ropero, Manuel Almendro-Delia, Rafael Hidalgo-Urbano
A 72-year-old female with a previous history of aortic valve replacement by biological prosthesis was admitted with progressive heart failure. The clinical course was unfavorable, requiring inotropic support and invasive mechanical ventilation. Auto-triggering of the ventilator from cardiac origin has been previously described, and explained as a consequence of hyperdynamic circulation. In our case, the oscillatory movements due to the aortic regurgitation are transmitted to the airway. Early recognition of this condition can facilitate not only the correction this asynchrony in mechanical ventilation but also should raise the suspicion of aortic regurgitation...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544842/transfemoral-valve-in-valve-in-a-degenerated-small-aortic-bioprosthesis-five-year-follow-up
#2
Stefano Salizzoni, Federico Conrotto, Mauro Rinaldi, Gian Paolo Ussia, Gaetana Ferraro, Mauro Giorgi, Maurizio D'Amico
A small-sized bioprosthesis can limit transcatheter valve-in-valve (V-in-V) implantations. The case is reported of a 91-year-old woman who had successfully undergone a V-in-V procedure with a 26 mm CoreValve in a previously implanted Mitroflow 19 mm valve. At the five-year follow up the prosthesis showed good echocardiographic function and the patient was alive and free from major symptoms. The patient died three months after the follow up examination at the age of 96 years. This case demonstrates the feasibility, with acceptable longterm functioning, of a V-in-V procedure involving a small bioprosthesis...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544841/transcatheter-valve-in-valve-implantation-failing-tricuspid-bioprosthesis-in-a-patient-with-ebstein%C3%A2-s-anomaly
#3
Pedro A Villablanca, Aman M Shah, David F Briceno, Ali N Zaidi, Mei Chau, Mario J Garcia, David Slovut, Cynthia Taub
Transcatheter valve-in-valve (VIV) implantation has been recently proposed as an alternative to surgical reoperative aortic valve replacement in patients with a failing aortic bioprosthesis. Experience with transcatheter VIV implantation at other valve positions is very limited. Herein is reported the case of an 18-year-old man with Ebstein's anomaly and severe tricuspid valve (TV) regurgitation status after bioprosthetic valve replacement, who developed new dyspnea on exertion three years after the initial valve replacement...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544836/aortic-valve-replacement-with-the-labcor-tlpb-supra%C3%A2-porcine-bioprosthesis-intermediate-clinical-and-echocardiographic-outcomes
#4
Markus Schlömicher, Zulfugar Taghiyev, Yazan Al-Jabery, Peter Lukas Haldenwang, Leif Markthaler, Vadim Moustafine, Axel Maria Laczkovics, Justus Thomas Strauch, Matthias Bechtel
BACKGROUND: The Labcor TBLP Supra™ prosthesis is a second-generation tissue valve that has evolved from the Labcor TBLP™ prosthesis, first introduced in 1984. The Supra prosthesis is a triple-composite porcine valve, with no specific anticalcification treatment being used in its production other than standard tissue fixation with 0.4% glutaraldehyde. To date, more than 100,000 Supra valves have been implanted, mainly in South America. Despite this remarkably high number of implants, only marginal data exist concerning durability and safety issues...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544832/percutaneous-antegrade-trans-septal-closure-of-mitral-paravalvular-leak-without-creation-of-an-arteriovenous-wire-loop-in-patients-with-coexistent-mechanical-aortic-valve
#5
Teoman Kilic, Senol Coskun, Kurtulus Karauzum, Sadan Yavuz, Tayfun Sahin
BACKGROUND: Various approaches such as antegrade trans-septal, retrograde transfemoral and transapical techniques have been used to close mitral paravalvular leak (PVL) in patients with an aortic prosthesis. During the implementation of these techniques, an arteriovenous guidewire loop is often created for device delivery. However, passing through a mechanical aortic valve may cause hemodynamic compromise and prolong the procedure. To date, no studies have evaluated antegrade mitral PVL closure without the use of an arteriovenous wire loop in patients with a mechanical aortic prosthesis...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544829/symetis-tf-acurateneo%C3%A2-valve-in-valve-a-new-indication-for-another-self-expanding-tavi-prosthesis
#6
Elton Pllaha, Paolo Pagnotta, Marco Rossi, Bernhard Reimers
During the past decade there has been a major shift in the use of surgical bioprostheses. Consequently, due to the increasing age of the population there will be a major increase in the incidence of failure of these prostheses. While mortality associated with the re-replacement of surgical valve failures remains high, advances in transcatheter interventions have permitted the use of transcatheter valves in degenerative surgical bioprostheses. Herein is described the first use of the Symetis transfemoral ACURATEneo™ valve-in-valve procedure, together with details of the associated technical challenges...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544824/sutureless-valves-reduce-hospital-costs-compared-to-traditional-valves
#7
François Laborde, Thierry Folliguet, Gabriel Ghorayeb, Konstantinos Zannis
BACKGROUND: The study aim was to assess differences in clinical outcome, safety, and associated costs between sutureless and aortic isolated aortic valve replacement (AVR) with a standard bioprosthesis. METHODS: A retrospective comparative study was conducted to investigate 65 patients, each of whom had undergone isolated AVR with a traditional aortic valve (T) or a Perceval S sutureless aortic prosthesis (P) between January 2010 and December 2012. Cost data were drawn from the proprietary cost accounting system of the hospital, excluding acquisition costs of the devices...
January 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28544015/transfemoral-transcatheter-acurate-neo%C3%A2-aortic-valve-replacement-in-a-patient-with-a-previous-mechanical-mitral-valve
#8
Rodrigo Bagur, Vincenzo Pestrichella, Rosamaria Montesanti, Rossella Alemanni, Mauro Cassese
Transcatheter aortic valve replacement (TAVR) in the presence of a mechanical mitral valve (MMV) prosthesis is challenging due to the stiff mitral cage in the boundaries of the aorto-mitral curtain. We describe the technique for TAVR using the ACURATE-neo™ aortic bioprosthesis in a patient with a MMV prosthesis.
May 24, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28543392/mechanical-analysis-of-the-vascularized-fibular-graft-prosthetic-composite-vfgpc-for-internal-hemipelvectomy-reconstruction
#9
Jonathan Morris, Rui Yang, Michael Roth, Jonathan Gill, Richard Gorlick, Yungtai Lo, Bang H Hoang, Evan Garfein, David S Geller
INTRODUCTION: The vascularized fibular graft prosthetic composite (VFGPC) is used for reconstruction after internal hemipelvectomy. The purpose of this study was to create a mathematical model that calculates the mechanical effects of the vascularized fibular graft on the VFGPC. METHODS: The effects of the VFG positioning were calculated based on three-dimensional static analyzes to determine the direction, magnitude, and distribution of the forces through the prosthesis and VFG...
May 22, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28542633/new-chamber-stapes-prosthesis-a-preliminary-assessment-of-the-functioning-of-the-prototype
#10
Monika Kwacz, Magdalena Sołyga, Maciej Mrówka, Konrad Kamieniecki
Piston-stapedotomy is the most common method for hearing restoration in patients with otosclerosis. In this study, we have experimentally examined a prototype of a new chamber stapes prosthesis. The prototype was implanted in a human cadaver temporal bone. The round window vibrations before and after implantation were measured for the acoustic signal (90 dB SPL, 0.8-8 kHz) in the external auditory canal. In comparison with a 0.4-mm piston prosthesis, the chamber prosthesis induced significantly higher vibration of the round window, especially for frequencies above 1...
2017: PloS One
https://www.readbyqxmd.com/read/28542504/level-of-surgical-experience-is-associated-with-change-in-hip-center-of-rotation-following-cementless-total-hip-arthroplasty-a-radiographic-assessment
#11
Seung-Chan Kim, Young-Wook Lim, Soon-Yong Kwon, Woo-Lam Jo, Sung-Hun Ju, Chan-Joo Park, Choong-Woo Lee, Yong-Sik Kim
OBJECTIVES: After total hip arthroplasty (THA), restoration of hip center of rotation (COR) is essential to ensure stability of the prosthetic hip and longevity of the prosthesis. Our aim was to determine whether, and how, the COR changed postoperatively compared to the native COR following implantation of a cementless acetabular component in anatomical position and to compare the accuracy of cup placement between two surgeons with different levels of surgical experience. MATERIALS AND METHODS: We evaluated 145 patients (145 hips) who underwent unilateral primary THA, who had no distorted acetabulum on the affected hip and a normal contralateral hip...
2017: PloS One
https://www.readbyqxmd.com/read/28541915/embedded-system-for-prosthetic-control-using-implanted-neuromuscular-interfaces-accessed-via-an-osseointegrated-implant
#12
Enzo Mastinu, Pascal Doguet, Yohan Botquin, Bo Hakansson, Max Ortiz-Catalan
Despite the technological progress in robotics achieved in the last decades, prosthetic limbs still lack functionality, reliability, and comfort. Recently, an implanted neuromusculoskeletal interface built upon osseointegration was developed and tested in humans, namely the Osseointegrated Human-Machine Gateway. Here, we present an embedded system to exploit the advantages of this technology. Our artificial limb controller allows for bioelectric signals acquisition, processing, decoding of motor intent, prosthetic control, and sensory feedback...
May 23, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28541895/noncontact-electrical-permittivity-mapping-and-ph-sensitive-films-for-osseointegrated-prosthesis-and-infection-monitoring
#13
Sumit Gupta, Kenneth J Loh
The objective of this study is to develop a noncontact, noninvasive system for detecting and monitoring subcutaneous infection occurring at the tissue and osseointegrated prosthesis interface. It is known that the local pH of tissue can change due to infection. Therefore, the sensing system integrates two parts, namely, pH-sensitive thin films that can be coated onto prosthesis surfaces prior to them being implanted and an electrical capacitance tomography (ECT) algorithm that can reconstruct the spatial permittivity distribution of a region of space in a noncontact fashion...
May 23, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28541598/pediatric-melody-mitral-valve-replacement-in-acute-endocarditis-alternative-surgical-hybrid-technique
#14
Ireneusz Haponiuk, Maciej Chojnicki, Radosław Jaworski, Mariusz Steffens, Konrad Paczkowski, Aneta Szofer-Sendrowska, Marta Paśko-Majewska, Katarzyna Gierat-Haponiuk, Anna Romanowicz, Wiktor Szymanowicz
BACKGROUND AND AIM: Acute endocarditis (AE) is still rare disease in pediatric population, nevertheless the children suffering from AE usually need heart valves repair or replacement in emergency settings. METHODS: We present a case of emergency mitral valve replacement with the use of Melody balloon expandable stented bioprosthesis in a 2-years-old patient with acute endocarditis, subsequent mitral (bicuspid) valve incompetence after aggressive infective destruction with the symptoms of critical multiorgan failure...
May 25, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28540566/-osteosynthesis-associated-infections-epidemiology-definition-and-diagnosis
#15
REVIEW
N Renz, S Feihl, C E Dlaska, M A Schütz, A Trampuz
Osteosynthesis-associated infections occur in 1-5% after closed and in up to 30% after open fractures. There are three different descriptions of implant-associated infections after fracture fixation, which are crucial for the selection of the adequate treatment strategy; temporal appearance from the index surgery (early versus late), pathogenesis of the infection (exogenous, hematogenous and contiguous from an adjacent focus), duration of infection symptoms (acute versus chronic). Diagnosis of osteosynthesis-associated infection is challenging, as chronic low-grade infections often present only with unspecific and subtle clinical symptoms...
May 24, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28540521/comparative-study-of-fat-suppression-techniques-for-hip-arthroplasty-mr-imaging
#16
Sébastien Molière, Jean-Philippe Dillenseger, Matthieu Ehlinger, Stéphane Kremer, Guillaume Bierry
OBJECTIVES: The goal of this study was to evaluate different fat-suppressed fluid-sensitive sequences in association with different metal artifacts reduction techniques (MARS) to determine which combination allows better fat suppression around metallic hip implants. METHODS: An experimental study using an MRI fat-water phantom quantitatively evaluated contrast shift induced by metallic hip implant for different fat-suppression techniques and MARS. Then a clinical study with patients addressed to MRI unit for painful hip prosthesis compared these techniques in terms of fat suppression quality and diagnosis confidence...
May 24, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28540415/incidence-of-osteosynthesis-of-members-in-france
#17
Patrice Papin, Eric Berthonnaud
PURPOSE: Little data is available on the number of osteosynthesis of limbs in a country. Incidence of osteosynthesis is an essential element for the formation and organization of care. Based on the data from the work of the Hospital Information Technology Agency ( http://www.atih.sante.fr/ ) and available in open access, we wanted to know the incidence of the number of osteosynthesis performed in France and their evolution over ten years between 2006 and 2015. METHODS: The data analyzed are derived from the website of the technical agency of information on the hospitalization (ATIH)...
May 24, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28540149/treatment-challenges-of-prosthetic-hip-infection-with-associated-iliacus-muscle-abscess-report-of-5-cases-and-literature-review
#18
Joshua M Lawrenz, Nathan W Mesko, Carlos A Higuera, Robert M Molloy, Claus Simpfendorfer, Maja Babic
Prosthetic joint infection is an unfortunate though well-recognized complication of total joint arthroplasty. An iliacus and/or iliopsoas muscle abscess is a rarely documented presentation of hip prosthetic joint infection. It is thought an unrecognized retroperitoneal nidus of infection can be a source of continual seeding of the prosthetic hip joint, prolonging attempts to eradicate infection despite aggressive debridement and explant attempts. The current study presents five cases demonstrating this clinical scenario, and discusses various treatment challenges...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28540148/clinical-and-microbiological-characteristics-of-bacteroides-prosthetic-joint-infections
#19
Neel Shah, Douglas Osmon, Aaron J Tande, James Steckelberg, Rafael Sierra, Randall Walker, Elie F Berbari
Clinical and microbiological characteristics of patients with Bacteroides prosthetic joint infection (PJI) have not been well described in the literature. The aim of this retrospective cohort study was to assess the outcome of patients with Bacteroides PJI and to review risk factors associated with failure of therapy. Between 1/1969 and 12/2012, 20 episodes of Bacteroides PJI in 17 patients were identified at our institution. The mean age of the patients in this cohort at the time of diagnosis was 55.6 years; 59% (n=10) had knee involvement...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28540146/-combined-diagnostic-tool-application-to-a-retrospective-series-of-patients-undergoing-total-joint-revision-surgery
#20
Enrico Gallazzi, Lorenzo Drago, Andrea Baldini, Ian Stockley, David A George, Sara Scarponi, Carlo L Romanò
Background: Differentiating between septic and aseptic joint prosthesis may be challenging, since no single test is able to confirm or rule out infection. The choice and interpretation of the panel of tests performed in any case often relies on empirical evaluation and poorly validated scores. The "Combined Diagnostic Tool (CDT)" App, a smartphone application for iOS, was developed to allow to automatically calculate the probability of having a of periprosthetic joint infection, on the basis of the relative sensitivity and specificity of the positive and negative diagnostic tests performed in any given patient...
2017: J Bone Jt Infect
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