Rats with right hemicolectomy were divided into two groups. One group was free-fed (RHFF), the other group pair-fed (RHPF) and both were compared with a group of control animals. The nitrogen balance (NB) was studied for 5 days at 2 and 14 weeks after surgery. The two groups of rats with right hemicolectomy excreted significantly more fecal nitrogen than the control group (p < 0.01) during the two periods of study. At 2 weeks the RHFF group increased N intake so that their NB was similar to that of the control group. In the same period the nitrogen lost in urine and the NB were reduced in the RHPF rats (p < 0.01). At 14 weeks the results were similar to those for 2 weeks although the increase in food intake for RHFF and the decrease in NB for RHPF were not statistically significant. The rats with right hemicolectomy showed a decreased gain in body weight. This decrease was more pronounced in the RHPF group. The nitrogen content of the carcass and liver was significantly reduced in the RHPF group 4 months after surgery. It is concluded that the rats with right hemicolectomy were characterized by an increment in the nitrogen lost in feces, and when they were only allowed the same intake of food as the control group, the animals showed marked abnormalities in growth and in the nitrogen content of the organism.

Objectives:To identify patients with a diagnosis of acute and complete ACL rupture that healed spontaneously, and to determine whether such healing is related to age, sex, type of rupture, resting time, and trauma mechanisms.Materials and Methods:30 patients with complete acute ACL rupture were evaluated by clinical diagnosis and Magnetic Resonance Image (MRI). Both Lysholm test and IKDC 2000 were used for subjective evaluation.Results:All patients improved from the first to the second consult, with the following results: Lachman (p <0.0406), pivot shift (p = 0.071), and anterior drawer (p <0.001). During the follow-up MRI, all patients showed signs of healing in ACL. With an average follow-up of 12 months for men (95% CI 6-17) and 13 months for women (95% CI 31 max.), a nearly complete clinical recovery could be inferred, as well as healing occurring independently of variables such as age, sex, or specific treatment (p = 0.795 and p = 0.841).Discussion:Despite this study size limitation, the objectives were achieved. There would be spontaneous ACL healing associated with a 3-month post-injury resting time, but it is unrelated to age, sex, specific physiotherapy treatments, or the use of immobilizers. Level of evidence: level of evidence IV

Level IV-case series.

Materials and methods:We retrospectively reviewed 1,186 knee MRI reports from January 1, 2015 to July 31, 2015, using the computerized clinical history system. These were classified according to the origin of the request for the images (specialists in orthopedics and traumatology, residents of traumatology and other medical specialties). This information was explored for its characterization.Retrospective study. Level of evidence IV Results: We obtained 33% (389) normal report of knee, significantly lower (p <0.001) to 67% reporting injuries.The proportion of studies requested was mostly by specialists in orthopedics and traumatology (59%), followed by the proportion required by different medical specialties (27%) and by those prescribed by traumatology residents (13%). The percentages of normal reports of those studies requested were different (p <0.05) 29, 42 and 32%, respectively. Conclusion:In primary care by physicians and residents of traumatology, the request for knee MRI reports a high percentage of normal reports. Specialists in orthopedics and traumatology request this exam with greater demand and present greater findings of injuries.

<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span><strong>RESUMEN</strong><br /> <strong>In­tro­duc­ción: </strong></span><span>el objetivo de este trabajo fue evaluar prospectivamente los resultados del drenaje de gangliones dorsales de muñeca y la ruptura de su pedículo guiada por ecografía, y determinar su tasa de recidiva, las complicaciones y los resultados subjetivos. </span></p><p><strong>Materiales ­y ­Métodos: </strong><span>se evaluaron prospectivamente 32 pacientes con gangliones dorsales sintomáticos de muñeca tratados mediante punción guiada por ecografía, aspiración del contenido y ruptura del pedículo con un trocar, entre enero de 2010 y junio de 2011. La edad de los pacientes promedió 31 años. Todos realizaban tareas administrativas, y retornaron a sus tareas habituales al día siguiente del procedimiento. El puntaje DASH previo al procedimiento fue, en promedio, de 2,90. El dolor previo al procedimiento promedió 7,75 puntos. Se separó a los pacientes en dos grupos, gangliones primarios (grupo 1: 19 pacientes) y gangliones recurrentes con cirugía previa (grupo 2: 13 pacientes). </span></p><p><strong>Resultados: </strong><span>once pacientes tuvieron recidivas (34,3%) al año de seguimiento: 5 del grupo 1 (26,31%) y 6 del grupo 2 (46,1%). El puntaje DASH a los 6 meses promedió 1,91 (rango 1,02-3,98). El dolor a los 6 meses promedió 1,53 puntos (rango 0-4). Ningún paciente presentó complicaciones neurológicas o tendinosas, infección o hematomas (seguimiento promedio 6 meses).</span></p><p><strong>Conclusión:­ </strong><span>la técnica bajo control ecográfico es mínimamente invasiva con una tasa de recurrencia aceptable (26% en pacientes sin antecedente quirúrgico), considerando que plantea menores riesgos que los procedimientos quirúrgicos al igual que un menor costo y bajo costo laboral. </span></p><div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p> </p></div></div></div></div></div></div>