Utilidad de la procalcitonina sérica para la discriminación temprana entre fascitis necrosante y celulitis de las extremidades : serie de casos y revisión de la literatura

Objective: to assess the usefulness of a risk scale based on serum procalcitoninwhen compared with the LRINEC score in the early discrimination between necrotizing fasciitis (NF) and extremities cellulite.Material and method: retrospective study, between 2009 and 2017, of all patients with the confirmed diagnosis of NF in one limb (N = 10). The findings of these patients were compared with those of 23 patients who were admitted for severe cellulitis of limbs in the same period. The variables related to each group were analyzed. Using the area under the curve (AUC), the discriminationcapacity for NF diagnosis of two scales was compared, one based on procalcitonin levels and another based on the LRINEC score.Results: the area under the curve was greater for the risk categorized by procalcitonin levels. When analyzing the LRINEC score and procalcitonin levels as continuous variables, the latter also presented a larger area under the curve. The cut-off point with the greatest area under the curve was that corresponding to> 0.87 ng / ml of procalcitonin (sensitivity of 100% and specificity of 82.6%) and score 5 on the LRINEC score (sensitivity of 80% and specificity of 82.6%).Conclusion: in our sample the level of procalcitoninand the scale based on this level has been shown as a more sensitive and at least as specific tool as the LRINEC scale for early discrimination between NF and a cellulite of the extremities

Notodo es "cut-out" : reclasificación de las complicaciones mecánicas del tornillo cefálico del clavo intramedular.

The use of the intramedullary nail in extracapsular fractures of the proximal third of the femur is the most frequent stabilization system. In recent years, the biomechanical complications that affect this system have been increasing.A retrospective radiographic study of intertrochanteric fractures was performed followed by an analysis of the biomechanical complications in zone 1 of the cephalic screw. Of the 548 cases, 85 cases (15.5%) of complications were observed, with "back-out" being the most frequent minor complication and "cut-out" the most frequent major complication. 41% of the total fractures correspond to type 31-A2.3 AO / OTA. The basicervical fractures and 31-A2.3 have a high risk of complications.The biomechanical origin that Lenich describes is important to understand as the surgical solution varies depending on whether it is cut-out, cut-in (same origin of the biomechanical failure of the head screw) or cut-through (different origin) to, consequently, resolve them in the right manne