Abstract. The objective of our study was to evaluate the association between acute periprosthetic joint infection (APJI) and radiographic measurement of soft-tissue thickness in elective total hip replacement surgery. A case-control study was conducted to compare the soft-tissue thickness radiographic measurement (SRM) at the hip in patients diagnosed with APJI based on Tsukayama et al. (2003) criteria after total hip replacement with patients that were not infected, at a single institution from 2013 to 2019. To minimize selection bias, each case was matched with two controls using the following methodology: patients of the same sex, with an age variation of ± 5 years, and nearest in surgery date to the cases were selected. All postoperative radiographs were performed in the first 24 h after total hip arthroplasty (THA) surgery as it is protocolized in our institution. Soft-tissue thickness radiographic measurement was defined as the distance from the tip of the greater trochanter to the skin following a perpendicular line to the femoral diaphysis in postoperative anteroposterior hip radiographs. In total, 78 patients were included (26 cases and 52 controls). The SRM median of the cases was 76.19 mm (SD: 26.518) and 53.5 mm (SD: 20.47) in controls. A multivariate logistic regression model showed an independent association between APJI and SRM (odds ratio (OR) = 1.033, 95 % confidence interval (CI) 1.007–1.059, p=0.012). Patients with an SRM greater than 60 mm had a 7-fold increase in the odds of APJI (OR = 7.295, 95 % CI = 2.364–22.511, p<0.001). The results of our study suggest an association between large SRM at the hip and the risk of APJI in patients with primary total hip arthroplasty. SRM may be a helpful and easy tool for evaluating the risk of APJI before elective primary total hip replacement surgery.

Background and aim The current COVID-19 pandemic scenario has driven surgical departments to a transformation. The worldwide spread of the disease has led to a public health quarantine where health care professionals are at high risk of infection. In this context, telemedicine has been promoted and scaled up to reduce the risk of transmission. This study aims to demonstrate that a combined framework based on telematics and in-person clinical encounter not only ensures medical care but the safety of healthcare professionals and patients. Material and method Descriptive observational study on the follow-up of patients during the COVID19 Pandemic, combining telephone and traditional. Results A total of 5031 telephone calls were made, differentiating between medical referrals, specialised primary care visits, and outpatient consultation. They were classified as successful, required an in-person visit, or no successful telephone contact. Furthermore, we divided them into 2 groups: resolved and unresolved. 53% of all telematic visits were successful. Conclusions Telematic medical systems are a feasible option in a orthopedics department and an interesting resource to preserve once the pandemic is resolved. Future lines of research should be opened to improve system success, analyze its cost-effectiveness ratio, and correct any legal conflicts that may exist.

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A partir de la segunda mitad del siglo XX, América Latina participa, desde el campo teórico, en la revisión de los modos de interpretar el sistema internacional, fuertemente influida por su condición de periférica en un sistema internacional signado históricamente por las políticas de poder de los “grandes” actores internacionales y las fuerzas diversas que los atraviesan. Se plantea, de este modo, la necesidad de superar las lógicas del poder y los modos de interpretar la política internacional desde sus propias rutas teóricas. Es así como el logocentrismo de las Relaciones Internacionales, en clave presentista y estatocéntrica, es revisitado, desde la Periferia, para construir, en diálogo con la historia, nuevos enfoques teóricos. En ese contexto, surge en la década del ‘90 desde la Argentina, el Realismo Periférico, una teoría de Relaciones Internacionales elaborada por Carlos Escudé. La pregunta a plantearse es cuál es la importancia que asigna a la historia en la explicación de las Relaciones Internacionales, teniendo en cuenta que, desde su lectura realista, se presentan en tensión la inmutabilidad del sistema internacional en términos de relaciones de poder, el imperativo de que la Periferia acepte sus reglas en pos de su insercióninternacional y las trayectorias de la humanidad bajo los supuestos del poder.