63 research outputs found
Plate-assisted Bone Segment Transport With Motorized Lengthening Nails and Locking Plates:A Technique to Treat Femoral and Tibial Bone Defects
Making America a Better Place for All: Sustainable Development Recommendations for the Biden Administration
In 2015, the United Nations Member States, including the United States, unanimously approved 17 Sustainable Development Goals (SDGs) to be achieved by 2030. The SDGs are nonbinding; each nation is to implement them based on its own priorities and circumstances. This Article argues that the SDGs are a critical normative framework the United States should use to improve human quality of life, freedom, and opportunity by integrating economic and social development with environmental protection. It collects the recommendations of 22 experts on steps that the Biden-Harris Administration should take now to advance each of the SDGs. It is part of a book project that will recommend not only federal actions, but also actions by state and local governments, the private sector, and civil society. In the face of multiple challenges and opportunities, this Article is intended to contribute to a robust public discussion about how to accelerate the transition to a sustainable society and make America a better place for all
Making America A Better Place for All: Sustainable Development Recommendations for the Biden Administration
In 2015, the United Nations Member States, including the United States, unanimously approved 17 Sustainable Development Goals (SDGs) to be achieved by 2030. The SDGs are nonbinding; each nation is to implement them based on its own priorities and circumstances. This Article argues that the SDGs are a critical normative framework the United States should use to improve human quality of life, freedom, and opportunity by integrating economic and social development with environmental protection. It collects the recommendations of 22 experts on steps that the Biden-Harris Administration should take now to advance each of the SDGs. It is part of a book project that will recommend not only federal actions, but also actions by state and local governments, the private sector, and civil society. In the face of multiple challenges and opportunities, this Article is intended to contribute to a robust public discussion about how to accelerate the transition to a sustainable society and make America a better place for all
Tacrolimus pretreatment attenuates preexisting xenospecific immunity and abrogates hyperacute rejection in a presensitized hamster to rat liver transplant model
In the hamster to rat liver transplant model, we determined the efficacy of tacrolimus in attenuating natural xenospecific humoral immunity and in abrogating the hyperacute liver rejection that is produced by presensitizing the Lewis rat recipient. Hamster livers, transplanted orthotopically into naive rats (controls), were rejected with animal death after 6.4±0.5 (SD) days. The infusion on (day -6) of 1.5 x 107 hamster hepatocytes, or of 1.5 x 108 nonparenchymal cells (NPC), resulted in hyperacute rejection and death in ≤1.9 days. However, when the rats were pretreated with 1 mg/kg/day tacrolimus from days -6 to -1, survival of non-presensitized animals was prolonged to 25±20 days and that of recipients presensitized with hamster hepatocytes to 36±16 days or with NPC to 32±1.7 days. The tacrolimus pretreatment significantly reduced the hamster-specific complement-dependent cytotoxic antibodies response directed to liver NPC but not to lymph node cell targets. These observations suggest that the prolongation of survival by appropriately timed treatment with this T cell directed drug model is caused by the inhibition of humoral as well as cellular xenograft rejection
The Oxford IgA nephropathy clinicopathological classification is valid for children as well as adults
To study the predictive value of biopsy lesions in IgA nephropathy in a range of patient ages we retrospectively analyzed the cohort that was used to derive a new classification system for IgA nephropathy. A total of 206 adults and 59 children with proteinuria over 0.5 g/24 h/ 1.73 m2and an eGFR of stage-3 or better were followed for a median of 69 months. At the time of biopsy, compared with adults children had a more frequent history of macroscopic hematuria, lower adjusted blood pressure, and higher eGFR but similar proteinuria. Although their outcome was similar to that of adults, children had received more immunosuppressants and achieved a lower follow-up proteinuria. Renal biopsies were scored for variables identified by an iterative process as reproducible and independent of other lesions. Compared with adults, children had significantly more mesangial and endocapillary hypercellularity, and less segmental glomerulosclerosis and tubulointerstitial damage, the four variables previously identified to predict outcome independent of clinical assessment. Despite these differences, our study found that the cross-sectional correlation between pathology and proteinuria was similar in adults and children. The predictive value of each specific lesion on the rate of decline of renal function or renal survival in IgA nephropathy was not different between children and adults
The Oxford classification of IgA nephropathy: pathology definitions, correlations, and reproducibility
Pathological classifications in current use for the assessment of glomerular disease have been typically opinion-based and built on the expert assumptions of renal pathologists about lesions historically thought to be relevant to prognosis. Here we develop a unique approach for the pathological classification of a glomerular disease, IgA nephropathy, in which renal pathologists first undertook extensive iterative work to define pathologic variables with acceptable inter-observer reproducibility. Where groups of such features closely correlated, variables were further selected on the basis of least susceptibility to sampling error and ease of scoring in routine practice. This process identified six pathologic variables that could then be used to interrogate prognostic significance independent of the clinical data in IgA nephropathy (described in the accompanying article). These variables were (1) mesangial cellularity score; percentage of glomeruli showing (2) segmental sclerosis, (3) endocapillary hypercellularity, or (4) cellular/ fibrocellular crescents; (5) percentage of interstitial fibrosis/ tubular atrophy; and finally (6) arteriosclerosis score. Results for interobserver reproducibility of individual pathological features are likely applicable to other glomerulonephritides, but it is not known if the correlations between variables depend on the specific type of glomerular pathobiology. Variables identified in this study withstood rigorous pathology review and statistical testing and we recommend that they become a necessary part of pathology reports for IgA nephropathy. Our methodology, translating a strong evidence-based dataset into a working format, is a model for developing classifications of other types of renal disease
Staged humerus lengthening with monolateral fixation followed by a circular frame: Technique of fixator change
Monolateral external fixator (MEF) has been commonly used for limb lengthening in both upper and lower extremities. Since MEF can only lengthen or shorten the bone, sagittal, coronal, and torsional deformities need to be corrected acutely at the time of MEF application. Acute correction, particularly torsional correction, may endanger the radial or peroneal nerves. Gradual correction of torsion may be safely achieved using a circular external fixator (CEF) frame. We present a case study of humeral lengthening with derotation to describe a technique, whereby it is possible to first lengthen with MEF and then derotate with CEF. This is a case report of a 14-year-old boy with a history of neonatal sepsis and growth arrest of the proximal humerus that led to a short right humerus and loss of external rotation. Humerus lengthening was achieved (6.6 cm) using MEF. Conversion to CEF was done after the distraction phase and prior to regenerate bone consolidation. Two 2/3 rings were connected to the proximal and distal fixation half-pins, and then the six connecting struts were added. The rotation deformity correction was then performed gradually to achieve 60° of external rotation. The described technique to convert the MEF into CEF is versatile and can be employed in the clinic safely and without sedation
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