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Cost-Effectiveness of Somatostatin Analogues for the Treatment of Acromegaly in Colombia

Open Journal of Endocrine and Metabolic Diseases 2012年第4期2卷 102-106页

作者： Rafael Alfonso-Cristancho Santiago Herran diazgranados Kariluz Maestre Martinez oscar david diaz-sotelo Novartis de Colombia Rafael Alfonso SA Pharmaceutical Outcomes Research and Policy Program University of Washington Seattle USA RANDOM Foundation Bogotá Colombia

Background: Somatostatin analogues have shown to be effective in controlling the levels of growth hormone and are recommended for the treatment of acromegaly. These treatments have high costs of acquisition and their use might be restricted in limited resource settings. Objective: To evaluate the cost-effectiveness of somatostatin analogues for acromegaly in Colombia. Setting/Subjects/Intervention: A decision model was developed using a hypothetical cohort of patients with Acromegaly. Patients were treated according to the clinical practice of the country. Response to treatment and transition probabilities were derived from published literature. Costs and resource utilization were extracted from public and private sources in Colombia. Main Outcome Measure(s): Cost-effectiveness ratio, measured in Colombian pesos in a 2 year time-horizon. Results: The total medical treatment costs for the octreotide group were (Colombian Pesos) COP$ 53,807,616, compared to the total costs for the lanreotide group of COP$ 83,126,567. In the octreotide arm 65.30% of the patients and in the lanreotide arm 59.50% of the patients were successfully controlled. The number of deaths was 295 (13.1%) and 302 (13.4%) for octreotide and lanreotide, respectively. Because the costs are lower and the effectiveness is higher for octreotide in comparison with lanreotide, octreotide is more cost-effective than lanreotide. Probabilistic sensitivity analyses were consistent showing octreotide as the most cost-effective option. Conclusions: Costs and effects of octreotide compare favorably to those of lanreotide in the treatment of acromegaly in Colombia. Sensitivity analysis showed that despite the uncertainty in cost-effectiveness ratio this result is robust.

关键词： Acromegaly Somatostatin Analogues Octeotride Lanreotide Cost-Effectiveness

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Hydrogen storage in a rare-earth perovskite-type oxide La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_3 for battery applications

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Rare Metals 2018年第12期37卷 1003-1013页

作者： John Henao oscar sotelo Maura Casales-diaz Lorenzo Martinez-Gomez CONACYT-CIATEQ A.C. Av. Manantiales 23-AParque Industrial Bernardo Quintana Instituto de Ciencias Fisicas (ICF) Universidad Nacional Autonoma de Mexico (UNAM)-Campus Morelos

Recently, rare-earth perovskite-type oxides with the general formula ABO(A rare earth element, B transition metal, O oxygen) are regarded as promising materials for Ni/oxide batteries due to their hydrogen storage ability. In the present study, the hydrogen storage properties of the rare-earth perovskite-type oxide LaSrCoFeOwere evaluated in alkaline solution and at various temperatures. The hydrogen storage properties were investigated electrochemically by applying galvanostatic charge/discharge currents. Electrochemical pressurecomposition-temperature isotherms were constructed using the Nernst equation. The exchange current density and proton hydrogen diffusion coefficient were calculated using linear polarization measurements and the potential-step method, respectively. Interestingly, the maximum hydrogen absorption capacity, re-calculated from the electrochemical capacity, is 1.72 wt% at 333 K and 6 mol·LKOH. In addition, the hysteresis value, calculated from pressure-composition-temperature isotherms, was429 J·molat 333 K,while the self-discharge rate was about 25% after 24-h storage at open circuit and at 333 K.

关键词： Hydrogen storage Rare earths Perovskites Ni/oxide batteries

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Cost-Effectiveness of Somatostatin Analogues for the Treatment of Acromegaly in Colombia

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Open Journal of Endocrine and Metabolic Diseases（内分泌与新陈代谢疾病期刊） 2012年第4期

作者： Rafael Alfonso-Cristancho Santiago Herran diazgranados Kariluz Maestre Martinez oscar david diaz-sotelo

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