Introduction: Recently various mechanical circulatory support systems are being used all over the world, nevertheless the size of the devices limits the implantation in pediatric cases. Accordingly we report our experiences with assist devices applied for pediatric patients.
Patients And Methods: Twenty-nine children underwent mechanical circulatory support implantation operation. The diagnoses of preoperation were dilated cardiomyopathy in 16, congenital heart disease in 12 and allograft dysfunction in 1.
Results: From November 1987 to January 2004 we implanted 7 LVAD, 11 BVAD and 11 ECMO in pediatric patients. The 29 patients were supported from 11 to 231 days (mean 32.3 days). Three children were supported by Thoratec LVAD. Biventricular Thoratec VAD was used in 3 children. Three children were supported by Medos-HIA system LVAD, and 8 children by biventricular VAD using the Medos-HIA system. One child was supported by Novacor LVAD. Fourteen children were supported by ECMO. We succeeded in heart transplantation in 10 cases, but lost 16 children during the support. Bleeding occurred in 7 cases, thrombosis occurred in 6 cases, infection occurred in 8 cases, pneumothorax occurred in 3 cases and neurological deficit occurred in 2 cases.
Conclusion: The development of assist device for children which has long durability and small in size as a future subject is desired. Further clinical and experimental research and application of those assist devices for children are in progress.
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J Neurochem
January 2025
Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Canada.
Highly abundant in neurons, the cellular prion protein (PrP) is an obligatory precursor to the disease-associated misfolded isoform denoted PrP that accumulates in the rare neurodegenerative disorders referred to either as transmissible spongiform encephalopathies (TSEs) or as prion diseases. The ability of PrP to serve as a substrate for this template-mediated conversion process depends on several criteria but importantly includes the presence or absence of certain endoproteolytic events performed at the cell surface or in acidic endolysosomal compartments. The major endoproteolytic events affecting PrP are referred to as α- and β-cleavages, and in this review we outline the sites within PrP at which the cleavages occur, the mechanisms potentially responsible and their relevance to pathology.
View Article and Find Full Text PDFJ Bone Joint Surg Am
January 2025
Leeds Institute of Health Sciences, School of Medicine, University of Leeds, Leeds, West Yorkshire, England.
Background: In this study, we estimated the risk of surgically treated postoperative periprosthetic femoral fractures (POPFFs) associated with femoral implants frequently used for total hip arthroplasty (THA).
Methods: In this cohort study of patients who underwent primary THA in England between January 1, 2004, and December 31, 2020, POPFFs were identified from prospectively collected revision records and national hospital records. POPFF incidence rates, adjusting for potential confounders, were estimated for common stems.
PLoS One
January 2025
Department of Environmental Health, Qingdao Municipal Center for Disease Control and Prevention, Qingdao Institute of Disease Prevention, Qingdao, Shandong, China.
Background: It is crucial to comprehend the interplay between air pollution and meteorological conditions in relation to population health within the framework of "dual-carbon" targets. The purpose of this study was to investigate the impact of intricate environmental factors, encompassing both meteorological conditions and atmospheric pollutants, on respiratory disease (RD) mortality in Qingdao, a representative coastal city in China.
Methods: The RD mortality cases were collected from the Chronic Disease Surveillance Monitoring System in Qingdao during Jan 1st, 2014 and Dec 31st, 2020.
Objective: Aim: Study the mechanism of interaction between the 'sacroiliac joint - screw' system and determine the optimal parameters of the stabilizing structure, the strength of the system connection through computer modeling, and anatomical-biomechanical experiment.
Patients And Methods: Materials and Methods: The optimal parameters of the stabilizing structure for the sacroiliac joint were calculated using software package MathCAD. To validate the results of the numerical modeling, corresponding investigations of mechanical characteristics and determination of stiffness of the studied systems were conducted by an upgraded testing stand, TIRAtest-2151.
JAMA Netw Open
January 2025
Magee-Womens Research Institute, Department of Obstetrics, Gynecology and Reproductive Sciences, Epidemiology and Clinical and Translational Research, University of Pittsburgh, Pittsburgh, Pennsylvania.
Importance: Chronic hypertension and preeclampsia are leading risk enhancers for maternal-neonatal morbidity and mortality. Severe maternal morbidity (SMM) indicators include heart, kidney, and liver disease, but studies have not excluded patients with preexisting diseases that define SMM. Thus, SMM risks for uncomplicated chronic hypertension specific to preeclampsia remain unclear.
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