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Background: In total knee arthroplasty and total hip arthroplasty occurs a considerable loss of blood, which often requires homologous transfusions of red blood cells. However, homologous transfusions have risks, besides being expensive and a limited resource. Thus, in order to reduce the need for homologous transfusions alternatives strategies have been developed, like post-operative recovery of blood.Objectives: Evaluation of post-operative recovery of blood in postoperatively red blood cells consumption and in hospital stay, by a retrospective analysis of patients undergoing total knee arthroplasty or total hip arthroplasty.Material and Methods: Patients (n = 976) were divided in 2 groups: CELL TRANS – after implementation of postoperative recovery of blood and CONT – before implementation of the strategy. The red blood cells requests to Serviço de Imunohemoterapia gave the number of RBC units administered and the length of hospital stay was obtained through the Sistema de Apoio ao Médico. Statistical analysis was performed using the R language, considering significant differences between groups when p values < 0,05.Results: After the introduction of this strategy, 29% of patients undergoing total knee arthroplasty and 38% of patients undergoing total hip arthroplasty received red blood cells in the postoperative period, a number considerably lower to that observed before the implementation of post-operative recovery of blood, 68% and 59% respectively. Concomitantly, there was a statistically significant reduction in the length of stay of 9.0 to 8.3 days in the case of total knee arthroplasty patients and from 9.1 to 8.8 days in the case of patients undergoing total hip arthroplasty.Conclusion: Post-operative recovery of blood in patients undergoing total knee arthroplasty or total hip arthroplasty significantly reduces the need for red blood cells transfusion and the length of hospital stay.

In the present work a study of the situation that is presented in Brazil with regard to the sexually transmitted diseases is made, indicating those groups of people for which the most common certain diseases. It introduces a system of differential equations that simulates the process of transmission of different diseases, if different cases are studied that derive from the general system; the system is simplified according to the case, a qualitative study of the system of equations is presented and conclusions are drawn regarding the future situation in relation to the number of infested patients.

Avoidant restrictive food intake disorder (ARFID) is one of the least clearly understood feeding and eating disorders, and there are no guidelines for its treatment. Patients with ARFID often present comorbid psychiatric disorders. The feeding and eating disorders can present with pancytopenia associated with poor nutritional status. Our aim is to present a clinical case of pancytopenia in a patient with ARFID. The case concerns a 20‑year‑old man hospitalized with pancytopenia. It was diagnosed ARFID and comorbid generalized anxiety disorder. Cognitive behavior therapy was implemented, and after six months there was an improvement in the feeding behavior, with greater diversity of ingested food and remission of pancytopenia. This is the first documented case of ARFID with pancytopenia. A multidisciplinary approach is crucial not only for the correct diagnosis, but also for the effective treatment with relapse prevention.

In the present work a study of the situation that is presented in Brazil with regard to the sexually transmitted diseases is made, indicating those groups of people for which the most common certain diseases. It introduces a system of differential equations that simulates the process of transmission of different diseases, if different cases are studied that derive from the general system; the system is simplified according to the case, a qualitative study of the system of equations is presented and conclusions are drawn regarding the future situation in relation to the number of infested patients.