2014 and were subsequently converted to gastric banding, gastric bypass or sleeve gastrectomy. Women who got pregnant during the initial gastric banding follow-up and patients that performed more than one conversion were excluded. Results: A total of 103 patients were included. Fifteen underwent revision to gastric banding, 71 to gastric bypass and 17 to sleeve gastrectomy. Respectively, percentage of excess weight loss at 1 month were 1.9 ± 12.2% in 6 patients, 36.9 ± 18.2% in 49 patients and 27.1% (13.3 -68.6) in 11 patients (laparoscopic adjustable-gastric banding-laparoscopic Roux-en-Y gastric bypass p < 0.001, laparoscopic adjustable-gastric banding-laparoscopic sleeve gastrectomy p = 0.002 and laparoscopic Roux-en-Y gastric bypass--laparoscopic sleeve gastrectomy p = 0.474). At 3 months there were 12.8% (5.7 -84.8) in 6 patients, 44.8 ± 19.7% in 24 patients and 48 ± 20.1% in 8 patients (laparoscopic adjustable-gastric banding-laparoscopic Roux-en-Y gastric bypass p = 0.017, laparoscopic adjustable-gastric banding-laparoscopic sleeve gastrectomy p = 0.039 and laparoscopic Roux-en-Y gastric bypass-laparoscopic sleeve gastrectomy p = 0.691). Discussion: At revision, ages and body mass indices are higher than other studies. Gastric bypass is the preferred revision surgery, because combines restriction and malabsorption, surgeons have more experience and long term outcomes are better described. Conclusions:The main indications for reoperation were inadequate weight loss (37.4%) and band slippage (30%). At short term, in our patients, gastric banding as a revision surgery was not effective, as opposed to gastric bypass and sleeve gastrectomy.

A detailed investigation and characterization is made of the magnetic phase transitions that occur in the cubic CeFe2 Laves phase compound using high resolution direct measurements of the temperature derivative of the electrical resistivity (dϱ/dT). The results confirm the existence of a spin reorientation transition (SRT) in the ferromagnetic phase of CeFe2 at Tsr ≈ (132 ± 1) K, of second order character. This transition can be understood in terms of a [100] → [uuw] spin reorientation transition due to a non‐negligible K3 term in the expression of the magnetic anisotropy energy. Near the Curie temperature, critical analysis of dϱ/dT data shows that CeFe2 behaves as an isotropic Heisenberg ferromagnet with a critical temperature Tc ≈ (227.5 ± 0.1) K and a critical exponent α = 0.10 ± 0.02. This value is consistent with the theoretical expectancy based on the magnetic specific heat.

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