Prevalencia de portación nasal de Staphylococcus aureus sensible y resistente a la meticilina en candidatos a artroplastia total de cadera o rodilla / Prevalence of nasal carriage of methicillin-sensitive and methicillin-resistant Staphylococcus aureus in candidates for total hip or knee arthroplasty

INTRODUCIÓN Las infecciones perioperatorias en cirugía de reemplazo articular son fuente importante de morbimortalidad, así como de altos costos económicos y sociales, tanto para el paciente como para su entorno. La colonización preoperatoria por Staphylococcus aureus ha sido reconocida como un factor de riesgo importante para desarrollar una infección de sitio quirúrgico.El objetivo de este estudio es conocer la prevalencia de portación nasal de S. aureus, tanto sensible a la meticilina (SASM) como resistente a la meticilina (SARM), en pacientes candidatos a cirugía de reemplazo articular de cadera o rodilla. MATERIALES Y MÉTODOS Se realizó un estudio observacional de una cohorte retrospectiva de pacientes con indicación de artroplastia total de cadera (ATC) y rodilla (ATR) electiva por artrosis severa en un hospital público de Chile. Los pacientes fueron sometidos a tamizaje preoperatorio de portación, cultivándose muestras obtenidas mediante hisopado de ambas fosas nasales. Los datos del laboratorio fueron recopilados y presentados como porcentaje de portación de S. aureus. RESULTADOS Se estudiaron 303 pacientes consecutivos de ATC y 343 de ATR. En total, 483 de los 646 pacientes (74,7%) tuvieron estudio preoperatorio de portación nasal. Se identificaron 123 pacientes (25,4%) portadores de S. aureus, de los cuales sólo 2 (0,41%) casos correspondieron a SARM. CONCLUSIÓN La prevalencia de portación nasal de S. aureus obtenida fue de 25%, similar a lo reportado en otras series. La prevalencia de SARM (0.41%), sin embargo, estuvo bajo lo descrito en la literatura internacional (0,6­6%). Sería de utilidad, dada la alta prevalencia de portación descrita en nuestro trabajo y de acuerdo a evidencia publicada recientemente, realizar protocolos de descolonización universales, sin necesidad de realizar tamizaje preoperatorio.

INTRODUCTION Surgical-site infections in joint replacement surgery are an important source of morbidity and mortality that entail high economic and social burden both for the patient and their environment. Preoperative colonization by Staphylococcus aureus has been recognized as an important risk factor for the development of surgical-site infection. The aim of the present study is to determine the prevalence of nasal colonization by S. aureus, both methicillin-sensitive (MSSA) and methicillin-resistant (MRSA) in patients who are candidates for total replacement of the hip or knee joints. MATERIALS AND METHODS A retrospective observational study of a cohort of 646 patients with an indication to undergo total hip arthroplasty (THA) or total knee arthroplasty (TKA) due to severe osteoarthritis was performed in a Public Hospital in Chile. The patients were submitted to a preoperative screening for S. aureus carriage, and the culture samples were obtained by swabbing both nostrils. The laboratory data was collected and presented as a percentage of carriage. RESULTS We consecutively examined 303 THA and 343 TKA patients. A total of 483 of the 646 patients (74.7%) underwent a preoperative study of nasal carriage. We identified 123 (25.4%) S. aureus carriers, and only found 2 (0.41%) cases corresponding to MRSA. CONCLUSION We found a prevalence of nasal carriage of S. aureus of 25.4%, a rate similar to that reported in other series. The prevalence of MRSA (0.41%), however, was lower than that reported in the international literature (0.6­6%). Given the high prevalence of carriage described in our work and according to recently published data, it would be worthwhile to carry out universal decolonization protocols, without the need for preoperative screening.

Periprosthetic Infections: Five Steps to Keep Moving Forward in 2021.

The 2010 to 2020 decade produced remarkable advances in the understanding of periprosthetic joint infections (PJI). However, the challenges that surgeons and clinical researchers will face in the coming decade are many. Among the tactics that should comprise the strategy to keep moving forward are: (1) The incorporation of value-based healthcare concepts in PJI diagnosis. (2) Personalized approaches to estimate PJI risk and prevent it. (3) The concentration of PJI cases in multidisciplinary superspecialized units of treatment. (4) The use of a uniform definition to categorize failed and successful episodes of treatment. (5) Using the best available evidence as a benchmark to guide daily bedside decision-making.

Protrusio acetabular en artroplastía total de cadera: diez tácticas para un buen resultado quirúrgico / Total hip arthroplasty in protrusio acetabuli: ten tips to improve surgical outcomes

Los pacientes candidatos a artroplastía total de cadera con protrusio acetabular asociada generan distintos desafíos en los equipos quirúrgicos. Múltiples estrategias han sido utilizadas a lo largo de los años para optimizar los resultados. Mediante una revisión de la evidencia actualizada disponible, proponemos diez tácticas a realizar en el manejo de estos pacientes que pueden mejorar y hacer predecible el tratamiento de un paciente con protrusio acetabular al que se le realiza una artroplastía total de cadera. Nivel de Evidencia V.

Patients with acetabular protrusio and osteoarthritis are a challenge for the surgical team. Many strategies have been developed to anticipate, plan and optimize the surgical results of these patients. Based on the current available clinical evidence, we propose ten tips to improve the surgical management of hip arthroplasty patients with protrusio acetabuli. Level of Evidence V.

Hip fractures in the elderly Chilean population: a projection for 2030.

Using national databases, we projected the magnitude of hip fractures among the elderly Chilean population by 2030. Hip fractures will increase by 27.5% from 2018 to 9862 cases (95% CI = 8760 to 10,965). The most substantial growth is expected to occur in patients older than 80 years of age. INTRODUCTION: There is scarce information regarding the magnitude of hip fractures that will be observed in Latin American countries in the near future. The aim of this study is to project the volume of hip fractures in the elderly Chilean population by the year 2030. METHODS: The database of the Chilean Department of Statistics and Health Information, which includes all hospital discharges within Chile, was employed to evaluate the volume of hip fractures observed from 2012 to 2018 in the elderly population (≥ 65 years old). The annual incidence was determined by combining the volume of fractures with census data. Linear regression analysis was performed to determine the projected volume of hip fractures for 2030. RESULTS: For 2030, hip fractures among the elderly population are projected to grow 27.5% (R2 = 0.92) to 9862 cases (95% CI = 8760 to 10,965). In the group from 65 to 79 years old, hip fractures are expected to grow 21.6% (R2 = 0.87) to 3046 cases (95% CI = 2686 to 3405). In patients ≥ 80 years of age, hip fractures are expected to grow 30.1% (R2 = 0.9) to 6817 cases (95% CI = 5889 to 7744). CONCLUSIONS: A substantial growth in the volume of hip fractures is expected for the next decade among the elderly Chilean population, especially in patients ≥ 80 years of age. A national healthcare strategy should consider efforts to mitigate the impact of the future burden related to patients' care.