MethodsSearches on MEDLINE, the Cochrane Library, Embase and Google Scholar were performed to locate studies involving patients receiving internal hemipelvectomy and pelvic reconstruction using a prosthesis, implant or bone graft. All studies were either prospective or retrospective observational studies published in English. ResultsThis
systematic review included 12 studies from 1990 DMH1 to 2011 involving 217 patients from 5 to 77 years of age who had received follow-up for a period from 3 weeks to 15 years. Among the 12 studies, the mortality rate, disease-free rate and incidence of local recurrence were 10-69.2, 23.1-90.0 and 9.1-41.7%, respectively. The post-operative Musculoskeletal Tumor Society (MSTS) functional score ranged from 50 to 70 in the more recent studies. Compared with prostheses and other implants, patients who received allografts had the highest post-operative function, as shown by their MSTS scores, but also had a greater incidence of post-operative infection. On the other hand, the prosthesis AG-120 chemical structure group was associated with the highest percentage of fracture and dislocations, as well as other significant complications. ConclusionThis
comprehensive review provided informative details regarding the goals, outcomes and complications associated with this procedure and underscored the need for further investigation into the various surgical approaches currently available.”
“Eiby YA, Lumbers ER, Headrick JP, Lingwood BE. Left ventricular output and aortic blood flow in response to changes in preload and afterload in the preterm piglet heart. Am J Physiol Regul Integr Comp Physiol 303: R769-R777, 2012. First published August 15, 2012; doi:10.1152/ajpregu.00010.2012.-Low systemic blood flow occurs in up to 30% of
infants born at less than 30 wk gestation. It is associated with increased morbidity and mortality, and current treatments are ineffective in 40% of cases. The aim of this study was to assess the ability of the preterm heart to respond to the acute shifts in preload and afterload that occur at the time of birth. Myocardial and coronary vascular function was assessed using an isolated working heart model in term (115 days) and preterm (92 days) piglets. Cardiac output/kg body wt in preterm hearts was similar to 50% lower than that of term hearts AZD4547 (P = 0.001). Pressure development was similar in term and preterm hearts. Elevations in preload increased cardiac output and aortic flow similarly in term and preterm hearts, demonstrating significant preload “reserve”. By contrast, elevations in afterload markedly depressed aortic flow, with a greater proportion of cardiac output being distributed to coronary flow in preterm hearts at high afterloads. The demands of increased workload were associated with greater increases in coronary flow in preterm hearts compared with term hearts.