[Risk factor control, lifestyle intervention, and prescribed medication in a cohort of patients with ischemic heart disease]. / Control sobre factores de riesgo, intervención sobre estilos de vida, y medicación prescrita en una cohorte de pacientes con cardiopatía isquémica.

OBJECTIVE: The aim of this study was to analyze the recommended prevention measures in our health area for patients discharged after a myocardial infarction. METHODS: This was a retrospective descriptive study that selected patients with acute coronary syndrome in our health area in the previous calendar year. Control of the risk factors observed at the time of the coronary event and at 1 year and medication prescribed 1 year after the episode were studied. Variables including age, sex, control of dyslipidemia, hypertension or diabetes mellitus, adherence to treatment and lifestyle habits were analyzed. RESULTS: Risk factor control was insufficient and sometimes even unassessed at the time of infarction. Although a slight improvement was perceived, control remained insufficient 1 year later. Moreover, patients, particularly women, were undertreated: one fifth (20%) more men were receiving appropriate treatment than women year after the myocardial event. CONCLUSIONS: An additional effort must be made compared to what is currently being done, both by specialists in Hospital Care and Primary Care, to carry out good control of risk factors, meaning the control of certain diseases such as diabetes, high blood pressure or dyslipidemia, as well as habits or lifestyles that increase the probability of suffering a cardiovascular event. Furthermore, it is important to avoid these cardiovascular diseases and their relapse to reinforce adherence to the prescribed treatments.

Cost analysis of next-generation imaging in high-risk prostate cancer staging.

INTRODUCTION AND OBJECTIVE: Next-generation imaging (NGI) tests, such as choline PET/CT and PSMA PET, have shown to increase sensitivity in the detection of nodal and metastatic disease in prostate cancer. However, their use implies an increase in diagnostic costs compared to conventional imaging (CI) tests such as CT and bone scan. The aim of our study was to determine which diagnostic pathway is more cost-effective in high-risk prostate cancer. MATERIAL AND METHOD: Cost-effectiveness analysis of the available imaging tests (CI, Choline/PSMA PET) for the staging of high-risk prostate cancer. Sensitivity and specificity were estimated based on published evidence, and costs were collected from the Management Department. In order to carry out a cost-effectiveness analysis, five diagnostic pathways were proposed estimating the accurate diagnoses. RESULTS: PSMA PET was the most accurate diagnostic option. The CI diagnostic workup was the most economical and CI+PSMA the most expensive. Analyzing the diagnostic cost-effectiveness ratio, CI+PSMA proved to be the most expensive (€5627.30 per correct diagnosis) followed by PET PSMA (€4987.11), choline (€4599.84) and CI (€4444.22). CONCLUSIONS: PSMA PET is the most accurate strategy in staging distant disease in patients with high-risk prostate cancer. Radiotracer uptake tests such as CI have been shown to be the most cost-effective option, followed by choline and PSMA.

Effect of hip hemiarthroplasty dislocation on mortality after hip fracture surgery / Efecto de la luxación de la prótesis parcial de cadera en la mortalidad tras la cirugía de fractura de cadera

Introduction: Hip arthroplasty is the treatment of choice for displaced femoral neck fractures among the older population. The hip prosthesis dislocation is one of the most pointed potential complications after hip arthroplasty, but there is a lack of updated information on the effect of dislocation on the survival of older hip fracture patients so treated by hip hemiarthroplasty. We aim to evaluate the standalone effect of hip prosthesis dislocation after hip fracture hemiarthroplasty on patients’ survival outcomes. Materials and methods: We conducted a retrospective multicenter study, including 6631 femoral neck fracture patients over 65 surgically treated by hemiarthroplasty. We made follow-up cut-offs 30-days, 6 weeks, 90-days, and one year after hospital discharge determining hip dislocation rate and patients’ survival. Results: The women population represented 78.7%, and the mean age of the population was 85.2±6.7 years. Hip prosthesis dislocation incidence was 1.9% in the first 90-days after discharge, representing 91.54% of primary dislocations yearly noted. We reported statistically significant increased mortality rates of patients presenting at least one hip prosthesis dislocation event (from 16.0% to 24.6% at 90-day after discharge, and 29.5% to 44.7% at one year), and also significantly decreasing patient survival function at 90-day (p=0.016) and one-year follow-up (p<0.001). The recurrent dislocation events (26.15%) showed even higher mortality rates (up to 60.6%, p<0.001). The multivariate Cox regression model determined that prosthesis dislocation was the only significant variable (p=0.035) affecting patient survival, increasing the risk of dying before one year of follow-up by 2.7 times. Discussion: Our study stands for the standalone hip prosthesis dislocation entailing a higher risk of death after hip fracture hemiarthroplasty in the older population.(AU)

Introducción: La artroplastia de cadera es el tratamiento de elección para las fracturas desplazadas del cuello de fémur en la población de edad avanzada. La luxación de la prótesis de cadera es una de las complicaciones potenciales tras la artroplastia de cadera, pero falta información actualizada sobre el efecto de la luxación en la supervivencia de los pacientes mayores con fractura de cadera tratados mediante hemiartroplastia de cadera. Nuestro objetivo es evaluar el efecto de la luxación de la prótesis de cadera (hemiartroplastia) como factor aislado, en la función de supervivencia de los pacientes. Materiales y métodos: Realizamos un estudio multicéntrico retrospectivo, que incluyó a 6.631 pacientes mayores de 65 años con fractura de cuello de fémur tratados quirúrgicamente mediante hemiartroplastia. Se realizaron cortes de seguimiento a los 30 días, 6 semanas, 90 días y un año del alta hospitalaria, determinando la tasa de luxación de cadera y la supervivencia de los pacientes. Resultados: La población femenina representó el 78,7%, y la edad media de la población fue de 85,2±6,7 años. La incidencia de luxación de la prótesis de cadera fue del 1,9% en los primeros 90 días tras el alta, lo que representa el 91,54% de las luxaciones primarias observadas anualmente. Se registró un aumento estadísticamente significativo de las tasas de mortalidad de los pacientes que presentaban al menos un evento de luxación de la prótesis de cadera (del 16,0 al 24,6% a los 90 días del alta, y del 29,5 al 44,7% al año), y también una disminución significativa de la función de supervivencia de los pacientes a los 90 días (p=0,016) y al año de seguimiento (p<0,001). Los eventos de luxación recurrente (26,15%) mostraron tasas de mortalidad aún más altas (hasta el 60,6%, p<0,001). El modelo multivariante de regresión de Cox determinó que la luxación de la prótesis de cadera es la única variable significativa (p=0,035) que afecta a la...(AU)

[Artículo traducido] Efecto de la luxación de la prótesis parcial de cadera en la mortalidad tras la cirugía de fractura de cadera / Effect of hip hemiarthroplasty dislocation on mortality after hip fracture surgery

Introducción: La artroplastia de cadera es el tratamiento de elección para las fracturas desplazadas del cuello de fémur en la población de edad avanzada. La luxación de la prótesis de cadera es una de las complicaciones potenciales tras la artroplastia de cadera, pero falta información actualizada sobre el efecto de la luxación en la supervivencia de los pacientes mayores con fractura de cadera tratados mediante hemiartroplastia de cadera. Nuestro objetivo es evaluar el efecto de la luxación de la prótesis de cadera (hemiartroplastia) como factor aislado, en la función de supervivencia de los pacientes. Materiales y métodos: Realizamos un estudio multicéntrico retrospectivo, que incluyó a 6.631 pacientes mayores de 65 años con fractura de cuello de fémur tratados quirúrgicamente mediante hemiartroplastia. Se realizaron cortes de seguimiento a los 30 días, 6 semanas, 90 días y un año del alta hospitalaria, determinando la tasa de luxación de cadera y la supervivencia de los pacientes. Resultados: La población femenina representó el 78,7%, y la edad media de la población fue de 85,2±6,7 años. La incidencia de luxación de la prótesis de cadera fue del 1,9% en los primeros 90 días tras el alta, lo que representa el 91,54% de las luxaciones primarias observadas anualmente. Se registró un aumento estadísticamente significativo de las tasas de mortalidad de los pacientes que presentaban al menos un evento de luxación de la prótesis de cadera (del 16,0 al 24,6% a los 90 días del alta, y del 29,5 al 44,7% al año), y también una disminución significativa de la función de supervivencia de los pacientes a los 90 días (p=0,016) y al año de seguimiento (p<0,001). Los eventos de luxación recurrente (26,15%) mostraron tasas de mortalidad aún más altas (hasta el 60,6%, p<0,001). El modelo multivariante de regresión de Cox determinó que la luxación de la prótesis de cadera es la única variable significativa (p=0,035) que afecta a la...(AU)

Introduction: Hip arthroplasty is the treatment of choice for displaced femoral neck fractures among the older population. The hip prosthesis dislocation is one of the most pointed potential complications after hip arthroplasty, but there is a lack of updated information on the effect of dislocation on the survival of older hip fracture patients so treated by hip hemiarthroplasty. We aim to evaluate the standalone effect of hip prosthesis dislocation after hip fracture hemiarthroplasty on patients’ survival outcomes. Materials and methods: We conducted a retrospective multicenter study, including 6631 femoral neck fracture patients over 65 surgically treated by hemiarthroplasty. We made follow-up cut-offs 30-days, 6 weeks, 90-days, and one year after hospital discharge determining hip dislocation rate and patients’ survival. Results: The women population represented 78.7%, and the mean age of the population was 85.2±6.7 years. Hip prosthesis dislocation incidence was 1.9% in the first 90-days after discharge, representing 91.54% of primary dislocations yearly noted. We reported statistically significant increased mortality rates of patients presenting at least one hip prosthesis dislocation event (from 16.0% to 24.6% at 90-day after discharge, and 29.5% to 44.7% at one year), and also significantly decreasing patient survival function at 90-day (p=0.016) and one-year follow-up (p<0.001). The recurrent dislocation events (26.15%) showed even higher mortality rates (up to 60.6%, p<0.001). The multivariate Cox regression model determined that prosthesis dislocation was the only significant variable (p=0.035) affecting patient survival, increasing the risk of dying before one year of follow-up by 2.7 times. Discussion: Our study stands for the standalone hip prosthesis dislocation entailing a higher risk of death after hip fracture hemiarthroplasty in the older population.(AU)

Effect of hip hemiarthroplasty dislocation on mortality after hip fracture surgery. / [Artículo traducido] Efecto de la luxación de la prótesis parcial de cadera en la mortalidad tras la cirugía de fractura de cadera.

INTRODUCTION: Hip arthroplasty is the treatment of choice for displaced femoral neck fractures among the older population. The hip prosthesis dislocation is one of the most pointed potential complications after hip arthroplasty, but there is a lack of updated information on the effect of dislocation on the survival of older hip fracture patients so treated by hip hemiarthroplasty. We aim to evaluate the standalone effect of hip prosthesis dislocation after hip fracture hemiarthroplasty on patients' survival outcomes. MATERIALS AND METHODS: We conducted a retrospective multicenter study, including 6631 femoral neck fracture patients over 65 surgically treated by hemiarthroplasty. We made follow-up cut-offs 30-days, 6 weeks, 90-days, and one year after hospital discharge determining hip dislocation rate and patients' survival. RESULTS: The women population represented 78.7%, and the mean age of the population was 85.2 ± 6.7 years. Hip prosthesis dislocation incidence was 1.9% in the first 90-days after discharge, representing 91.54% of primary dislocations yearly noted. We reported statistically significant increased mortality rates of patients presenting at least one hip prosthesis dislocation event (from 16.0% to 24.6% at 90-day after discharge, and 29.5% to 44.7% at one year), and also significantly decreasing patient survival function at 90-day (P = .016) and one-year follow-up (P < .001). The recurrent dislocation events (26.15%) showed even higher mortality rates (up to 60.6%, p < .001). The multivariate Cox regression model determined that prosthesis dislocation was the only significant variable (P = .035) affecting patient survival, increasing the risk of dying before one year of follow-up by 2.7 times. DISCUSSION: Our study stands for the standalone hip prosthesis dislocation entailing a higher risk of death after hip fracture hemiarthroplasty in the older population.

Effect of hip hemiarthroplasty dislocation on mortality after hip fracture surgery.

INTRODUCTION: Hip arthroplasty is the treatment of choice for displaced femoral neck fractures among the older population. The hip prosthesis dislocation is one of the most pointed potential complications after hip arthroplasty, but there is a lack of updated information on the effect of dislocation on the survival of older hip fracture patients so treated by hip hemiarthroplasty. We aim to evaluate the standalone effect of hip prosthesis dislocation after hip fracture hemiarthroplasty on patients' survival outcomes. MATERIALS AND METHODS: We conducted a retrospective multicenter study, including 6631 femoral neck fracture patients over 65 surgically treated by hemiarthroplasty. We made follow-up cut-offs 30-days, 6 weeks, 90-days, and one year after hospital discharge determining hip dislocation rate and patients' survival. RESULTS: The women population represented 78.7%, and the mean age of the population was 85.2±6.7 years. Hip prosthesis dislocation incidence was 1.9% in the first 90-days after discharge, representing 91.54% of primary dislocations yearly noted. We reported statistically significant increased mortality rates of patients presenting at least one hip prosthesis dislocation event (from 16.0% to 24.6% at 90-day after discharge, and 29.5% to 44.7% at one year), and also significantly decreasing patient survival function at 90-day (p=0.016) and one-year follow-up (p<0.001). The recurrent dislocation events (26.15%) showed even higher mortality rates (up to 60.6%, p<0.001). The multivariate Cox regression model determined that prosthesis dislocation was the only significant variable (p=0.035) affecting patient survival, increasing the risk of dying before one year of follow-up by 2.7 times. DISCUSSION: Our study stands for the standalone hip prosthesis dislocation entailing a higher risk of death after hip fracture hemiarthroplasty in the older population.

Implantación de un protocolo de recuperación precoz en artroplastia total de rodilla. Ensayo clínico aleatorizado / Implementation of a rapid recovery protocol in total knee arthroplasty. A randomized controlled trial

Introducción: Los programas de recuperación precoz (rapid recovery, RP) en artroplastia total de rodilla pueden mejorar la funcionalidad a la vez que se reducen los costes. El objetivo del estudio es comparar los resultados de un programa de rehabilitación precoz con nuestro protocolo habitual. Pacientes y métodos: Se realizó un ensayo clínico aleatorizado (NCT03823573) en pacientes operados de artroplastia total de rodilla. El grupo intervención (RP) recibió infiltración periarticular con levobupivacaína e inició deambulación supervisada a las 4-6 h tras la intervención. El grupo control (C) empleó drenaje y recibió un bloqueo femoral e inició la deambulación al retirar el drenaje. Los pacientes completaron un cuestionario Oxford Knee Score preoperatorio y a los 6 meses. La incidencia de trombosis venosa profunda asintomática se analizó mediante ecodoppler. El seguimiento mínimo fue de 6 meses. Resultados: Fueron incluidos 175 pacientes (92 pacientes en el grupo C y 83 en el RP). No hubo diferencias en sexo, edad, tipo de prótesis, descenso de hemoglobina, necesidad de transfusiones, balance articular activo al alta (C: 82,6°; RP: 85°) ni al finalizar el seguimiento (C: 105,1°; RP: 106,6°), mejoría del cuestionario (C: 17,5 puntos; RP: 19,3 puntos), satisfacción del paciente o reatenciones hospitalarias (C: 7,6%; RP: 10,8%). Se observó significación en el tiempo de isquemia (C: 81,29 min; RP: 85,35 min; p=0,03), necesidad de rescate con opioides (C: 19,7%; RP: 38,6%; p=0,007), estancia media (C: 3,84 días; RP: 2,54 días; p<0,0001) y demora en la deambulación (C: 2,46 días; RP: 0,23 días; p<0,0001). Conclusión: El protocolo RP puede reducir la estancia hospitalaria sin aumentar las complicaciones ni las reatenciones.(AU)

Background: Rapid recovery (RP) in total knee arthroplasty may increase the functionality while reducing costs. The aim of this study is to prove the benefits of a rapid recovery program compared to our classic protocol. Patients and methods: We performed a RCT (NCT03823573) in patients undergoing otal knee arthroplasty. Intervention group (RP protocol) received local infiltration of levo-bupivacaine in the periarticular tissue and supervized ambulation 4-6h after surgery. Control (C) group received a femoral nerve block with levo-bupivacaine, while a drain was used. Ambulation after its removal. All the patients completed an Oxford Knee Score prior to surgery and 6 months after discharge. An ecodoppler to assess the presence of deep vein thrombosis was made one month after discharge. Minimum follow-up was of 6 months. Results: A total of 175 patients were included in the trial (92 patients in the control group, 83 patients in the RP group). There were no differences in sex, age, implanted prosthesis, hemoglobin drop, need for transfusion, range of motion on discharge (C: 82.6°, RP: 85°) and at the end of the follow-up (C: 105.1, RP: 106.6), Oxford Knee Score improvement (C: 17.5 points; RP: 19.3 points), patient satisfaction or re-admissions at the emergency department (C: 7.6%; RP: 10.8%).Significancy was found on time of ischemia (C: 81.29min; RP: 85.35min; P=0.03), need for morphine shots (C: 19.7%; RP: 38.6%; P=0.007), hospital stay (C: 3.84 days; RP: 2.54 days, P<0.0001) and time until ambulation (C: 2.46 days; RP: 0.23 days; P<0.0001). Conclusion: Rapid recovery protocols can reduce hospital stay without increasing complications or need for re-admission.(AU)

[Translated article] Implementation of a rapid recovery protocol in total knee arthroplasty. A randomised controlled trial / Implantación de un protocolo de recuperación precoz en artroplastia total de rodilla. Ensayo clínico aleatorizado

Introducción: Los programas de recuperación precoz (rapid recovery, RP) en artroplastia total de rodilla pueden mejorar la funcionalidad a la vez que se reducen los costes. El objetivo del estudio es comparar los resultados de un programa de rehabilitación precoz con nuestro protocolo habitual. Pacientes y métodos: Se realizó un ensayo clínico aleatorizado (NCT03823573) en pacientes operados de artroplastia total de rodilla. El grupo intervención (RP) recibió infiltración periarticular con levobupivacaína e inició deambulación supervisada a las 4-6 h tras la intervención. El grupo control (C) empleó drenaje y recibió un bloqueo femoral e inició la deambulación al retirar el drenaje. Los pacientes completaron un cuestionario Oxford Knee Score preoperatorio y a los 6 meses. La incidencia de trombosis venosa profunda asintomática se analizó mediante ecodoppler. El seguimiento mínimo fue de 6 meses. Resultados: Fueron incluidos 175 pacientes (92 pacientes en el grupo C y 83 en el RP). No hubo diferencias en sexo, edad, tipo de prótesis, descenso de hemoglobina, necesidad de transfusiones, balance articular activo al alta (C: 82,6°; RP: 85°) ni al finalizar el seguimiento (C: 105,1°; RP: 106,6°), mejoría del cuestionario (C: 17,5 puntos; RP: 19,3 puntos), satisfacción del paciente o reatenciones hospitalarias (C: 7,6%; RP: 10,8%). Se observó significación en el tiempo de isquemia (C: 81,29 min; RP: 85,35 min; p=0,03), necesidad de rescate con opioides (C: 19,7%; RP: 38,6%; p=0,007), estancia media (C: 3,84 días; RP: 2,54 días; p<0,0001) y demora en la deambulación (C: 2,46 días; RP: 0,23 días; p<0,0001). Conclusión: El protocolo RP puede reducir la estancia hospitalaria sin aumentar las complicaciones ni las reatenciones.(AU)

Background: Rapid recovery (RP) in total knee arthroplasty may increase the functionality while reducing costs. The aim of this study is to prove the benefits of a rapid recovery program compared to our classic protocol. Patients and methods: We performed a RCT (NCT03823573) in patients undergoing otal knee arthroplasty. Intervention group (RP protocol) received local infiltration of levo-bupivacaine in the periarticular tissue and supervized ambulation 4-6h after surgery. Control (C) group received a femoral nerve block with levo-bupivacaine, while a drain was used. Ambulation after its removal. All the patients completed an Oxford Knee Score prior to surgery and 6 months after discharge. An ecodoppler to assess the presence of deep vein thrombosis was made one month after discharge. Minimum follow-up was of 6 months. Results: A total of 175 patients were included in the trial (92 patients in the control group, 83 patients in the RP group). There were no differences in sex, age, implanted prosthesis, hemoglobin drop, need for transfusion, range of motion on discharge (C: 82.6°, RP: 85°) and at the end of the follow-up (C: 105.1, RP: 106.6), Oxford Knee Score improvement (C: 17.5 points; RP: 19.3 points), patient satisfaction or re-admissions at the emergency department (C: 7.6%; RP: 10.8%).Significancy was found on time of ischemia (C: 81.29min; RP: 85.35min; P=0.03), need for morphine shots (C: 19.7%; RP: 38.6%; P=0.007), hospital stay (C: 3.84 days; RP: 2.54 days, P<0.0001) and time until ambulation (C: 2.46 days; RP: 0.23 days; P<0.0001). Conclusion: Rapid recovery protocols can reduce hospital stay without increasing complications or need for re-admission.(AU)

[Translated article] Implementation of a rapid recovery protocol in total knee arthroplasty. A randomised controlled trial.

BACKGROUND: Rapid recovery (RP) in total knee arthroplasty may increase the functionality while reducing costs. The aim of this study is to prove the benefits of a rapid recovery programme compared to our classic protocol. PATIENTS AND METHODS: We performed a RCT (NCT03823573) in patients undergoing otal knee arthroplasty. Intervention group (RP protocol) received local infiltration of levo-bupivacaine in the periarticular tissue and supervized ambulation 4-6h after surgery. Control (C) group received a femoral nerve block with levo-bupivacaine, while a drain was used. Ambulation after its removal. All the patients completed an Oxford Knee Score prior to surgery and 6 months after discharge. An ecodoppler to assess the presence of deep vein thrombosis was made 1 month after discharge. Minimum follow-up was of 6 months. RESULTS: A total of 175 patients were included in the trial (92 patients in the control group, 83 patients in the RP group). There were no differences in sex, age, implanted prosthesis, haemoglobin drop, need for transfusion, range of motion on discharge (C: 82.6°, RP: 85°) and at the end of the follow-up (C: 105.1, RP: 106.6), Oxford knee score improvement (C: 17.5 points; RP: 19.3 points), patient satisfaction or re-admissions at the emergency department (C: 7.6%; RP: 10.8%). Significancy was found on time of ischaemia (C: 81.29min; RP: 85.35min; p=.03), need for morphine shots (C: 19.7%; RP: 38.6%; p=.007), hospital stay (C: 3.84 days; RP: 2.54 days, p<.0001) and time until ambulation (C: 2.46 days; RP: 0.23 days; p<.0001). CONCLUSION: Rapid recovery protocols can reduce hospital stay without increasing complications or need for re-admission.

Implementation of a rapid recovery protocol in total knee arthroplasty. A randomized controlled trial. / Implantación de un protocolo de recuperación precoz en artroplastia total de rodilla. Ensayo clínico aleatorizado.

BACKGROUND: Rapid recovery (RP) in total knee arthroplasty may increase the functionality while reducing costs. The aim of this study is to prove the benefits of a rapid recovery program compared to our classic protocol. PATIENTS AND METHODS: We performed a RCT (NCT03823573) in patients undergoing otal knee arthroplasty. Intervention group (RP protocol) received local infiltration of levo-bupivacaine in the periarticular tissue and supervized ambulation 4-6h after surgery. Control (C) group received a femoral nerve block with levo-bupivacaine, while a drain was used. Ambulation after its removal. All the patients completed an Oxford Knee Score prior to surgery and 6 months after discharge. An ecodoppler to assess the presence of deep vein thrombosis was made one month after discharge. Minimum follow-up was of 6 months. RESULTS: A total of 175 patients were included in the trial (92 patients in the control group, 83 patients in the RP group). There were no differences in sex, age, implanted prosthesis, hemoglobin drop, need for transfusion, range of motion on discharge (C: 82.6°, RP: 85°) and at the end of the follow-up (C: 105.1, RP: 106.6), Oxford Knee Score improvement (C: 17.5 points; RP: 19.3 points), patient satisfaction or re-admissions at the emergency department (C: 7.6%; RP: 10.8%). Significancy was found on time of ischemia (C: 81.29min; RP: 85.35min; P=0.03), need for morphine shots (C: 19.7%; RP: 38.6%; P=0.007), hospital stay (C: 3.84 days; RP: 2.54 days, P<0.0001) and time until ambulation (C: 2.46 days; RP: 0.23 days; P<0.0001). CONCLUSION: Rapid recovery protocols can reduce hospital stay without increasing complications or need for re-admission.

Are the common sterilization methods completely effective for our in-house 3D printed biomodels and surgical guides?

INTRODUCTION: In-hospital 3D printing is being implemented in orthopaedic departments worldwide, being used for additive manufacturing of fracture models (or even surgical guides) which are sterilized and used in the operating room. However, to save time and material, prints are nearly hollow, while 3D printers are placed in non-sterile rooms. The aim of our study is to evaluate whether common sterilization methods can sterilize the inside of the pieces, which would be of utmost importance in case a model breaks during a surgical intervention. MATERIAL AND METHOD: A total of 24 cylinders were designed and printed with a 3D printer in Polylactic Acid (PLA) with an infill density of 12%. Manufacturing was paused when 60% of the print was reached and 20 of the cylinders were inoculated with 0.4 mL of a suspension of S epidermidis ATTCC 1228 in saline solution at turbidity 1 McFarland. Printing was resumed, being all the pieces completely sealed with the inoculum inside. Posteriorly, 4 groups were made according to the chosen sterilization method: Ethylene Oxide (EtO), Gas Plasma, Steam Heat or non-sterilized (positive control). Each group included 5 contaminated cylinders and 1 non-contaminated cylinder as a negative control. After sterilization, the inside of the cylinders was cultured during 7 days. RESULTS: We observed bacterial growth of just a few Forming Colony Units (FCU) in 4 out of 5 positive controls and in 2 out of 5 contaminated cylinders sterilized with Gas Plasma. We could not assess any bacterial growth in any of the EtO or Steam Heat samples or in any of the negative controls. Pieces sterilized under Steam Heat resulted completely deformed. CONCLUSIONS: High temperatures reached during the procedure of additive manufacturing can decrease the bacterial load of the biomodels. However, there is a potential risk of contamination during the procedure. We recommend sterilization with EtO for in-hospital 3D-printed PLA hollow biomodels or guides. Otherwise, in case of using Gas Plasma, an infill of 100% should be applied.

Electrochemically reduced graphene oxide on CoCr biomedical alloy: Characterization, macrophage biocompatibility and hemocompatibility in rats with graphene and graphene oxide.

Electrochemically reduced graphene oxide (ErGO) films on a biomedical grade CoCr alloy have been generated and characterized in order to study their possible application for use on joint prostheses. The electrodeposition process was performed by cyclic voltammetry. The characterization of the ErGO films on CoCr alloys by XPS revealed sp2 bonding and the presence of CO and CO residual groups in the graphene network. Biocompatibility studies were performed with mouse macrophages J774A.1 cell cultures measured by the ratio between lactate dehydrogenase and mitochondrial activities. An enhancement in the biocompatibility of the CoCr with the ErGO films was obtained, a result that became more evident as exposure time increased. Macrophages on the CoCr with the ErGO were well-distributed and conserved the characteristic cell shape. In addition, vimentin expression was unaltered in comparison with the control, results that indicated an improvement in the CoCr biocompatibility with the ErGO on the material surface. The in vivo response of graphene and graphene oxide was assessed by intraperitoneal injection in wistar rats. Red blood cells are one of the primary interaction sites so hemocompatibility tests were carried out. Rats inoculated with graphene and graphene oxide showed red blood cells of smaller size with a high content in hemoglobin.

Radiological results of surgical management of fracture of the distal radius treated with volar locking plates.

OBJECTIVES: Distal radius fracture (DRF) is the most common upper extremity fracture. The incidence of complications after surgical treatment still remains high. The objective of our study was to assess functional and radiological results of DRF treated with volar locking plate. METHODS: We conducted a retrospective study including DRF treated by open reduction and internal fixation with a volar locking plate during a period of 8 years (2010-2018). Data were collected from clinical records and included patient demographics, fracture characteristics, radiological parameters (radial inclination, palmar tilt, ulnar variance, articular step-off), range of motion (ROM), complications and reinterventions. RESULTS: A total of 170 patients (63.5% female) met the inclusion criteria with a mean age of 55.9 years [24.1-83.7; 13.76]. High energy injuries were more frequent in younger patients (25.56% vs 3.95%; p < 0.0001). AO classification was: 2R3A: 23.5%, 2R3B: 24.1% and 2R3C: 52.4%. Time until surgery was 8.5 days, longer in extraarticular fractures (AO-2R3A: 12.22 days, AO-2R3B: 7.97 days, AO-2R3C: 7.04 days, p = 0.018). Younger patients had better radial inclination (excellent in 85.1% vs 59.21%, p = 0.001) and radial shortening (excellent in 100% vs 88.15%, p = 0.001). ROM was: flexion 63° [0-90°; 19.73], extension 57.67° [5-90°; 21.61], pronation 78.94° [40-90°] and supination 81.76° [38-90°; 8.87]. We found a weak correlation between ROM in flexion-extension and radial shortening (r = 0.218; p = 0.001) and articular step-off (r = -0.269; p = 0.002). We had 39 complications (21.18% of patients). 10.6% of patients needed a re-operation, being the most frequent hardware removal (6.5%) and tendinous disruptions repairs (2.4%). Reintervention rate was higher in younger patients (14.9% vs 5.3%; p = 0.042), complete articular fractures (AO-2R3A: 2.5%; AO-2R3B: 7.3%; AO-2R3C: 15.7%; p = 0.037) and high energy injuries (8.4% vs 22.2%; p = 0.044). Patients undergoing reintervention had a decreased flexion-extension (94.44° vs 123.83°, p = 0.007). CONCLUSION: Radial shortening and articular step-off seem the most important predictors for postoperative range of motion. Worse radiological outcomes are observed in complete articular fractures and those affecting elder population. Although radiological and functional results are good or excellent in most of cases, the incidence of complications and need for reintervention still remains noticeable. Re-operations were more frequent in younger patients, complete articular fractures and high energy injuries, and it worsened functional outcomes.

Resultados a medio plazo de la artroplastia total de cadera metal-metal con cabeza de gran tamaño Magnum / Midterm results of Magnum large head metal-on-metal total hip arthroplasty

Objetivos: A raíz de las alertas sanitarias surgidas por la alta incidencia de recambios en la artroplastia de cadera metal-metal, se presentan los resultados obtenidos del seguimiento prospectivo de la serie de nuestro centro con cabezas de gran tamaño. Material y métodos: Se incluyeron todos los pacientes tratados con el cotilo Recap-M2a-Magnum, Biomet de 2008 a 2011. Se revisaron prospectivamente todos los pacientes registrando Harris Hip Score y síntomas de intoxicación por cromo-cobalto y se solicitaron niveles séricos de estos iones, radiografía y ecografía. Se solicitó resonancia magnética en caso de ecografía positiva. Resultados: Se incluyeron 26 varones de 48,54 años de edad media [32-62, DE: 7,18]. Se utilizó un abordaje anterolateral y vástagos Bimetric (7) o F40 (19). La moda de los diámetros cefálicos fue 46 [42-52]. La inclinación media del cotilo fue 39,35° [21-59°, DE: 9,78]. Durante el seguimiento (7,3 años [5,9-9,4 años, DE: 0,78]), 3 pacientes (11,5%) precisaron revisión (2 por movilización aséptica, un pseudotumor). El tiempo medio hasta la revisión fue 5,4 años [3,1-8,0, DE: 2,48]. La probabilidad acumulada de supervivencia fue del 88,5% (IC95% 76,3-100%). El Harris Hip Score fue de 94,47 [66,5-100, DE: 8,94] y los pacientes no mostraron ningún síntoma de intoxicación metálica, con niveles de cromo 1,88 mcg/dl [0,6-3,9] y cobalto 1,74 mcg/dl [0,5-5,6]. Se encontró un pseudotumor en un paciente asintomático y pequeñas cantidades de líquido periprotésico en 5 pacientes (19,2%). Discusión y conclusiones: Seguimos encontrando altas tasas de revisión al extender el seguimiento de los pacientes debido a la movilización aséptica y la formación de pseudotumores. La resonancia nuclear magnética no parece la prueba más adecuada para el estudio de las complicaciones de este tipo de prótesis

Objectives: We present the results of the prospective follow up of a sample of large head metal-metal total hip arthroplasty obtained after the safety alert regarding a higher incidence of revision of these implants. Material and methods: All patients implanted with the Recap-M2a-Magnum cup between 2008 and 2011 were included. They were prospectively reviewed recording Harris Hip Score, clinical symptoms of chromium or cobalt intoxication. Serum levels of these ions were requested as well as X-Rays and ultrasonography. An MRI was performed in the cases of positive ultrasonography. Results: Twenty-six males with a mean age of 48.54 years [32-62, SD: 7.18] were included. An anterolateral approach and Bi-Metric (7) and F-40 (19) stems were used. Cephalic diameters ranged 42-52 (mode: 46) and the mean cup inclination was 39.35° [21-59°, SD: 9.78]. During follow-up (7.3 years [5.9-9.4; SD: .78]), 3 patients (11.5%) underwent revision (2 cases aseptic loosening, 1 pseudotumour). Mean time until revision was 5.4 years [3.1-8.0; SD: 2.48]. The accumulated survival probability was 88.5% (95% CI 76.3-100%). Harris Hip Score was 94.47 [66.5-100; SD: 8.94] and the patients showed no metallic intoxication symptoms. The levels of chromium were 1.88 mcg/dl [0.6-3.9] and cobalt 1,74 mcg/dl [0.5-5,6]. One pseudotumour was found in an asymptomatic patient, and small amounts of periarticular liquid were found in 5 patients (19.2%) Discussion and conclusions: High revision rates are still found when follow up is extended due to aseptic loosening and pseudotumour formation. MRI might not be the most adequate test to study the complications of these prostheses

Midterm results of Magnum large head metal-on-metal total hip arthroplasty. / Resultados a medio plazo de la artroplastia total de cadera metal-metal con cabeza de gran tamaño Magnum.

OBJECTIVES: We present the results of the prospective follow up of a sample of large head metal-metal total hip arthroplasty obtained after the safety alert regarding a higher incidence of revision of these implants. MATERIAL AND METHODS: All patients implanted with the Recap-M2a-Magnum cup between 2008 and 2011 were included. They were prospectively reviewed recording Harris Hip Score, clinical symptoms of chromium or cobalt intoxication. Serum levels of these ions were requested as well as X-Rays and ultrasonography. An MRI was performed in the cases of positive ultrasonography. RESULTS: Twenty-six males with a mean age of 48.54 years [32-62, SD: 7.18] were included. An anterolateral approach and Bi-Metric (7) and F-40 (19) stems were used. Cephalic diameters ranged 42-52 (mode: 46) and the mean cup inclination was 39.35° [21-59°, SD: 9.78]. During follow-up (7.3 years [5.9-9.4; SD: .78]), 3 patients (11.5%) underwent revision (2 cases aseptic loosening, 1 pseudotumour). Mean time until revision was 5.4 years [3.1-8.0; SD: 2.48]. The accumulated survival probability was 88.5% (95% CI 76.3-100%). Harris Hip Score was 94.47 [66.5-100; SD: 8.94] and the patients showed no metallic intoxication symptoms. The levels of chromium were 1.88 mcg/dl [0.6-3.9] and cobalt 1,74 mcg/dl [0.5-5,6]. One pseudotumour was found in an asymptomatic patient, and small amounts of periarticular liquid were found in 5 patients (19.2%) DISCUSSION AND CONCLUSIONS: High revision rates are still found when follow up is extended due to aseptic loosening and pseudotumour formation. MRI might not be the most adequate test to study the complications of these prostheses.

Efficacy and safety of the topical application of tranexamic acid in primary cementless hip arthroplasty: prospective, randomised, double-blind and controlled study. / Eficacia y seguridad de la aplicación del ácido tranexámico tópico en la artroplastia primaria no cementada de cadera: estudio prospectivo, aleatorizado, doble ciego y controlado.

OBJECTIVE: To evaluate the efficacy of topical tranexamic acid topical in cementless total hip arthroplasty from the point of view of bleeding, transfusion requirements and length of stay, and describe the complications of use compared to a control group. MATERIAL AND METHODS: A prospective, randomised, double-blinded and controlled study including all patients undergoing cementless total hip arthroplasty in our centre between June 2014 and July 2015. Blood loss was estimated using the formula described by Nadler and Good. RESULTS: The final analysis included 119 patients. The decrease in haemoglobin after surgery was lower in the tranexamic acid group (3.28±1.13g/dL) than in the controls (4.03±1.27g/dL, P=.001) and estimated blood loss (1,216.75±410.46mL vs. 1,542.12±498.97mL, P<.001), the percentage of transfused patients (35.9% vs. 19.3%, P<.05) and the number of transfused red blood cell units per patient (0.37±0.77 vs. 0.98±1.77; P<.05). There were no differences between groups in the occurrence of complications or length of stay. CONCLUSIONS: The use of topical tranexamic acid in cementless total hip arthroplasty results in a decrease in bleeding and transfusion requirements without increasing the incidence of complications.

Papel de la medicina nuclear en el diagnóstico diferencial entre infarto óseo y osteomielitis en el contexto de drepanocitosis / Role of nuclear medicine in the differential diagnosis of bone infarction and osteomyelitis in drepanocytosis

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IgE, IgG1 and IgG4 response to specific allergens in sensitized subjects showing different clinical reactivity to Anisakis simplex.

SUMMARY: Background. Anisakis simplex hypersensitive subjects may be sensitized without clinical allergy, or experience acute symptoms or chronic urticaria induced by raw fish. We studied whether the 3 subgroups differ in IgE, IgG1 or IgG4 reactivity to specific Anisakis simplex allergens. Methods. 28 Anisakis simplex-hypersensitive adults, 11 with acute symptoms, 9 with chronic urticaria, and 8 sensitized were studied. IgE, IgG1 and IgG4 to rAni s 1, 5, 9 and 10 were sought by ELISA. IgE and IgG4 to nAni s 4 were determined by WB. Results. IgE to Ani s 1, 4, 5, 9, and 10 were found in 8, 3, 2, 5, and 9 sera, respectively. Nine sera did not react to any allergen. IgG1 to Ani s 1, 5, 9, and 10 were detected in 5, 16, 14, and 4 sera, respectively. Four sera did not react to any of the 4 allergens. IgG4 to Ani s 1, 4, 5, 9, and 10 were detected in 10, 0, 2, 6 and 1 sera, respectively. Fifteen subjects did not react to any of the 5 allergens. On ELISA sensitized subjects showed lower IgE and IgG1 levels than patients. IgG4 levels were highest in the sensitized group. The prevalence of IgE, IgG1 or IgG4 reactivity to any of the studied allergens did not differ between the 3 subgroups. Conclusion. The clinical expression of Anisakis simplex sensitization does not seem to depend on IgE reactivity to a specific allergen of the parasite, nor on the presence of IgG antibodies possibly related with blocking activity.

Study of overall and local electrochemical responses of oxide films grown on CoCr alloy under biological environments.

The interaction of the physiological medium and living tissues with the implant surfaces in biological environments is regulated by biopotentials that induce changes in the chemical composition, structure and thickness of the oxide film. In this work, oxide films grown on CoCr alloys at 0.5 V vs Ag/AgCl and 0.7 V vs Ag/AgCl have been characterized through overall and localized electrochemical techniques in a phosphate buffer solution and 0.3% hyaluronic acid. Nanopores of 10-50nm diameter are homogeneously distributed along the surface in the oxide film formed at 0.7 V vs Ag/AgCl. The distribution of the Constant Phase Element studied by local electrochemical impedance spectroscopy showed a three-dimensional (3D) model on the oxide films grown at 0.5 V vs Ag/AgCl and 0.7 V vs Ag/AgCl. This behaviour is especially noticeable in oxide films grown at 0.7 V vs Ag/AgCl, probably due to surface inhomogeneities, and resistive properties generated by the potentiostatic growth of the oxide film.