PFAS in fish from AFFF-impacted environments: Analytical method development and field application at a Canadian international civilian airport.

Methods targeting anionic per- and polyfluoroalkyl substances (PFAS) in aquatic biota are well established, but commonly overlook many PFAS classes present in aqueous film-forming foams (AFFFs). Here, we developed an analytical method for the expanded analysis of negative and positive ion mode PFAS in fish tissues. Eight variations of extraction solvents and clean-up protocols were first tested to recover 70 AFFF-derived PFAS from the fish matrix. Anionic, zwitterionic, and cationic PFAS displayed the best responses with methanol-based ultrasonication methods. The response of long-chain PFAS was improved for extracts submitted to graphite filtration alone compared with those involving solid-phase extraction. The validation included an assessment of linearity, absolute recovery, matrix effects, accuracy, intraday/interday precision, and trueness. The method was applied to a set of freshwater fish samples collected in 2020 in the immediate vicinity (creek, n = 15) and downstream (river, n = 15) of an active fire-training area at an international civilian airport in Ontario, Canada. While zwitterionic fluorotelomer betaines were major components of the subsurface AFFF source zone, they were rarely detected in fish, suggesting limited bioaccumulation potential. PFOS largely dominated the PFAS profile, with record-high concentrations in brook sticklebacks (Culaea inconstans) from the creek (16000-110,000 ng/g wet weight whole-body). These levels exceeded the Canadian Federal Environmental Quality Guidelines (FEQG) for PFOS pertaining to the Federal Fish Tissue Guideline (FFTG) for fish protection and Federal Wildlife Diet Guidelines (FWiDG) for the protection of mammalian and avian consumers of aquatic biota. Perfluorohexane sulfonamide and 6:2 fluorotelomer sulfonate were among the precursors detected at the highest levels (maximum of ∼340 ng/g and ∼1100 ng/g, respectively), likely reflecting extensive degradation and/or biotransformation of C6 precursors originally present in AFFF formulations.

Suspect screening of pharmaceuticals, illicit drugs, pesticides, and other emerging contaminants in Argentinean Piaractus mesopotamicus, a fish species used for local consumption and export.

The widespread distribution of contaminants of emerging concern (CECs) is a major concern due to their potential effects on human health and the environment. The insufficient sewage treatment plant infrastructures is a global problem most accentuated in less developed countries and results in the discharge of CECs to water bodies. Pacu (Piaractus mesopotamicus) is a ray-finned freshwater fish species native to the Paraná basin. It is also the most produced aquaculture fish species in Argentina since 2012. Though uninvestigated to date, the occurrence of CECs in pacu may be of high relevance due to production volumes and relevance to human exposure through fish consumption. In this study, we applied a high-resolution mass spectrometry screening method to qualitatively analyze over 100 CECs in pacu. Four extraction/cleanup methods were tested on pooled pacu fillet, including solid-phase extraction and QuEChERS. The method that produced the highest number of detections was selected for further analysis of pacu purchased in supermarkets and fish markets in Argentina between 2017 and 2020. Residues of pesticides, antibiotics, pharmaceuticals, personal care products, plasticizers, sweeteners, drug metabolites, stimulants, and illegal drugs were detected in the samples. A total of 38 CECs were detected, ranging between 24 and 35 CECs per individual sample. 100% of the samples had positive detections of caffeine, 1,7-dimethylxanthine, xanthine, benzoylecgonine, methylparaben, ethylparaben, bis(2-ethylhexyl) phthalate (DEHP), metolachlor, carbendazim, salicylic acid, 2,4-D, saccharin, cyclamate, and dodecanedioic acid. Mappings generated with correspondence analysis were used to explore similarities/dissimilarities among the detected compounds. To our knowledge this is the first report of saccharin, cyclamate, 2,4 - D, carbendazim, metolachlor, ethylparaben, propylparben, bisphenol A, DEHP, and benzotriazole in fish from Argentina, and the first report on the presence of lisinopril, metropolol acid and dodecanedioic acid in fish worldwide.

Different antibiotic profiles in wild and farmed Chilean salmonids. Which is the main source for antibiotic in fish?

Fish from both aquaculture and wild capture are exposed to veterinary and medicinal antibiotics (ABs). This study explored the occurrence and probable source of 46 antibiotic residues in muscle of farmed salmon and wild trout from Chile. Results showed that at least one AB was detected in all studied samples. Diverse patterns were observed between farmed and wild specimens, with higher ABs concentrations in wild fish. Considering antimicrobial resistance, detected ABs corresponded to the categories B (Restrict), C (Caution) and D (Prudence) established by Antimicrobial Advice Ad Hoc Expert Group (European Medicines Agency). Multivariate statistic was used to verify differences between farmed and wild populations, looking for the probable source of ABs as well. Principal components analysis (PCA) revealed that ciprofloxacin, moxifloxacin, enrofloxacin, amoxicillin, penicillin G, oxolinic acid, sulfamethoxazole, trimethoprim and clarithromycin were associated with wild samples, collected during the cold season. Conversely, norfloxacin, sulfaquinoxaline, sulfadimethoxine, nitrofurantoin, nalidixic acid, penicillin V, doxycycline, flumequine, oxacillin, pipemidic acid and sulfamethizole were associated with wild samples collected during the warm season. All farmed salmon samples were associated with ofloxacin, tetracycline, cephalexin, erythromycin, azithromycin, roxithromycin, sulfabenzamide, sulfamethazine, sulfapyridine, sulfisomidin, and sulfaguanidine. In addition, linear discriminant analysis showed that the AB profile in wild fish differ from farmed ones. Most samples showed ABs levels below the EU regulatory limit for edible fish, except for sulfaquinoxaline in one sample. Additionally, nitrofurantoin (banned in EU) was detected in one aquaculture sample. The differences observed between farmed and wild fish raise questions on the probable source of ABs, either aquaculture or urban anthropic activities. Further research is necessary for linking the ABs profile in wild fish with the anthropic source. However, to our knowledge, this is the first report showing differences in the ABs profile between wild and aquaculture salmonids, which could have both environmental and health consequences.

Sublethal effects of carbendazim in Jenynsia multidentata detected by a battery of molecular, biochemical and genetic biomarkers.

The fungicide carbendazim (CBM) has been applied all around the world but its potential adverse effects other than its recognized activity as endocrine disruptor in non target organisms have been scarcely studied. The aims of this work were (1) to use a battery of biomarkers that can reflect potential negative effects such as oxidative stress, genotoxicity, neurotoxicity or altered immune response; and (2) to examine biomarkers of detoxification by analyzing the gene expression of cytochrome P4501A1 (CYP1A1) and the multi-xenobiotic resistance protein P-glycoprotein (P-gp) in the freshwater fish Jenynsia multidentata exposed to environmentally relevant concentrations of CBM during 24 h. Fish exposed to 5 µg/L showed inhibition of GST activity and an increase of TBARs contents in gills, the organ of direct contact with waterborne contaminants. Genotoxicity - measured in peripheral blood-was evidenced by the increases of micronuclei frequency when fish were exposed to 5, 10 and 100 µg/L CBM and of nuclear abnormalities (NA) frequency at 0.05, 0.5, 5, 10 and 100 µg/L CBM. The expression inhibition of interleukin (IL-1ß) and tumor necrosis factor a (TNF-α) at 10, and 5 and 10 µg/L CBM, respectively, indicated an altered immune response. The expression of CYP1A1 was down regulated in liver at 10 µg/L and of P-gp at 5 µg/L CBM, indicating a possible slow on CBM metabolization. On the other hand, in gills CYP1A1 decreased at 5 and 10 µg/L while P-gp was induced at 5 and 100 µg/L CBM. Overall, most of these significant effects were detected below 10 µg/L CBM, in a range of realistic concentrations in aquatic ecosystems worldwide.

Multiantibiotic residues in commercial fish from Argentina. The presence of mixtures of antibiotics in edible fish, a challenge to health risk assessment.

The occurrence of 46 antibiotics (amphenicols, cephalosporins, dihydrofolate reductase inhibitors, fluroquinolones, macrolides, nitrofurans, penicillins, quinolones, sulfamides and tetracyclines) in Argentinean market fish were investigated by UPLC-MS/MS. Veterinary and human antimicrobials enrofloxacin, clarithromycin, roxithromycin, doxycycline and oxytetracycline were detected in 100% of the samples, being to our knowledge the first report of clarithromycin in edible fish muscle. Maximum Residual Limits were exceeded for at least one antibiotic in 82% of pacú, 57% of shad, 57% of trout and 50% of salmon samples. Chloramphenicol, furazolidone and nitrofurantoin (banned compounds in food items) were detected in 41%, 22% and 4% of the samples, respectively. Based on the estimated daily intake calculation, samples do not pose a serious risk to public health. Further investigation on the chronic impact and risk calculation of the mixture of antibiotics on the aquatic environment and human health is urgently needed.

High-flow nasal cannula oxygenation reduces postoperative hypoxemia in morbidly obese patients: a randomized controlled trial.

BACKGROUND: Postoperative pulmonary complications (PPCs) are common in high-risk surgical patients. Postoperative ventilatory management may improve their outcome. Supplemental oxygen through a high-flow nasal cannula (HFNC) has become an alternative to classical oxygenation techniques, although the results published for postoperative patients are contradictory. We examined the efficacy of HFNC in postoperative morbidly obese patients who were ventilated intraoperatively with an open-lung approach (OLA). METHODS: We performed an open, two-arm, randomized controlled trial in 64 patients undergoing bariatric surgery (N.=32 in each arm) from May to November 2017 at the Hospital Clínico of Valencia. Patients were randomly assigned to receive HFNC oxygen therapy at the time of extubation or to receive conventional oxygen therapy, both applied during the first three postoperative hours. Intraoperatively, a recruitment maneuver and individualized positive end-expiratory pressure was applied in all patients. The primary outcome was postoperative hypoxemia. RESULTS: All patients were included in the final analysis. There were no significant differences between the baseline characteristics. Postoperative hypoxemia was less frequent in the HFNC group compared to those who received standard care (28.6% vs. 80.0%, relative risk [RR]: 0.35; 95%CI: 0.150-0.849, P=0.009). Prevalence of atelectasis was lower in the HFNC group (31% vs. 77%, RR: 0.39; 95%CI: 0.166-0.925, P=0.013). No severe PPCs were reported in any patient. CONCLUSIONS: Early application of HFNC in the operating room before extubation and during the immediate postoperative period decreases postoperative hypoxemia in obese patients after bariatric surgery who were intraoperatively ventilated using an OLA approach.

The accuracy of postoperative, non-invasive Air-Test to diagnose atelectasis in healthy patients after surgery: a prospective, diagnostic pilot study.

OBJECTIVE: To assess the diagnostic accuracy of peripheral capillary oxygen saturation (SpO2) while breathing room air for 5 min (the 'Air-Test') in detecting postoperative atelectasis. DESIGN: Prospective cohort study. Diagnostic accuracy was assessed by measuring the agreement between the index test and the reference standard CT scan images. SETTING: Postanaesthetic care unit in a tertiary hospital in Spain. PARTICIPANTS: Three hundred and fifty patients from 12 January to 7 February 2015; 170 patients scheduled for surgery under general anaesthesia who were admitted into the postsurgical unit were included. INTERVENTION: The Air-Test was performed in conscious extubated patients after a 30 min stabilisation period during which they received supplemental oxygen therapy via a venturi mask. The Air-Test was defined as positive when SpO2 was ≤96% and negative when SpO2 was ≥97%. Arterial blood gases were measured in all patients at the end of the Air-Test. In the subsequent 25 min, the presence of atelectasis was evaluated by performing a CT scan in 59 randomly selected patients. MAIN OUTCOME MEASURES: The primary study outcome was assessment of the accuracy of the Air-Test for detecting postoperative atelectasis compared with the reference standard. The secondary outcome was the incidence of positive Air-Test results. RESULTS: The Air-Test diagnosed postoperative atelectasis with an area under the receiver operating characteristic curve of 0.90 (95% CI 0.82 to 0.98) with a sensitivity of 82.6% and a specificity of 87.8%. The presence of atelectasis was confirmed by CT scans in all patients (30/30) with positive and in 5 patients (17%) with negative Air-Test results. Based on the Air-Test, postoperative atelectasis was present in 36% of the patients (62 out of 170). CONCLUSION: The Air-Test may represent an accurate, simple, inexpensive and non-invasive method for diagnosing postoperative atelectasis. TRIAL REGISTRATION: NCT02650037.

Comunicación efectiva y ética en casos de epidemias y pandemias / Efective communication and ethics in cases of epidemics and pandemics

Las epidemias son un problema de salud pública y de comunicación en la sociedad, siendo fundamental, las estrategias de comunicación diseñadas con anticipación para tratar las posibles situaciones, objetivos detallados, públicos destinatarios, mensajes clave, herramientas o canales y planes de acción. La Comunicación en situaciones de epidemias constituye un proceso interactivo de intercambio de información y opinión entre personas, grupos e instituciones; suele incluir múltiples mensajes acerca de la naturaleza del riesgo o expresar preocupaciones, opiniones o reacciones acerca de los mensajes sobre el brote epidémico, de los arreglos legales e institucionales para la gestión del riesgo, incluyendo el contexto de la difusión digital; en ese sentido es importante considerar los principios para la planificación de la comunicación en brotes epidémicos propuestos por la Organización Mundial de la Salud. Con relación a las consideraciones éticas en epidemias, la protección de la salud de la población, valor intrínseco del más alto grado, relacionado directamente con el principio de beneficencia, es para las administraciones sanitarias no solo un imperativo ético, sino también una obligación, respaldada por la Declaración de Bioética y Derechos Humanos y en el marco legal de los estados constituidos. Considerar los aspectos éticos que surgen en las epidemias, contribuye a mejorar las respuestas personales, sociales y profesionales en riesgo, desde la dimensión social de la Bioética.

Epidemics are a public health and communication problem in society, with communication strategies designed in advance to deal with possible situations, detailed objectives, target audiences, key messages, tools or channels and action plans. Communication in epidemic situations is an interactive process of exchange of information and opinion among individuals, groups and institutions; It often includes multiple messages about the nature of the risk or express concerns, opinions or reactions about outbreak messages, legal and institutional arrangements for risk management, including the context of digital dissemination; In this regard it is important to consider the principles for communication planning in epidemic outbreaks proposed by the World Health Organization.With regard to ethical considerations in epidemics, the protection of the health of the population, intrinsic value of the highest degree, directly related to the principle of beneficence, is for health administrations not only an ethical imperative, but also an obligation, supported by the Declaration of Bioethics and Human Rights and in the legal framework of the constituted states. Considering the ethical aspects that arise in the epidemics, contributes to improve personal, social and professional responses at risk, from the social dimension of Bioethics.

Rotavirus / Rotavirus

la infección por rotavirus es responsable de 125 millones de casos, de más 500.000 defunciones anuales y de 40% de la hospitalización por diarrea en menores de 5 años de edad. en países en desarrollo la tasa de infección es más alta en el grupo de edad de 3 a 11 meses, quienes presentan mayor letalidad producto de la desnutrición y de la dificultad para acceder oportunamente a los servicios de salud; se observa que al año de vida, 65-80 % de los niños han desarrollado anticuerpos contra el rotavirus y 95% a los 2 años. Actualmente se utilizan dos vacunas contra el rotavirus, las cuales han demostrado ser seguras, eficaces y poco relacionadas con invaginación intestinal. En venezuela, la vacuna monovalente-humana se introdujo en el Programa Ampliado de Inmunizaciones en abril de 2006. un estudio previo mostró que la administración masiva de dos dosis de esta vacuna contra el rotavirus es altamente costo-efectiva. cuatro años después en un estudio nacional se evaluó el impacto y se evidenció reducción de 50% de la tasa de mortalidad en los menores de 5 años, siendo mayor en el grupo de menores de 1 año con 55% y en el grupo de 1-4 años de 44%. sin embargo el seguimiento de este programa nos indica que las coberturas de inmunización contra rotavirus en venezuela siguen siendo bajas

Infection by rotavirus is responsible for 125 million cases, 500,000 annual deaths and 40% of hospitalizations for diarrhea in children under 5 years of age. In developing countries the rate of infection is higher in the group of 3 to 11 months of age, which present a higher lethality, product of undernourishment and difficulties to accede opportunely to health services. during the first year of life, 65 to 80%of children have developed antibodies against rotavirus and 95% will achieve this by the age of two. At the moment two vaccines against rotavirus are available, and have demonstrated to be safe, effective and with very low association with intestinal invagination. In venezuela, the monovalent-human vaccine was introduced in the extended Program of Immunizations in April of 2006. A previous study showed that the massive administration of two doses of this vaccine against rotavirus is highly cost-effective. Four years later, a national study showed a reduction of mortality rate of 50% in children under 5 years of age, 55% reduction in those less than one year and 44% reduction in the group of 1-4 years of age. nevertheless the follow up of this program indicates that immunization coverage against rotavirus in venezuela continues to be low

Vacunas anti neumocócicas / Pneumococcal vaccines

Existen vacunas contra el Streptococcus pneumoniae. Una de polisacáridos capsulares con 23 antígenos y las vacunas conjugadas, denominadas así, porque los polisacáridos están conjugados a una mutante no tóxica de la toxina diftérica o a la proteína D delHaemophilus influenzae no tipificable, a una proteína transportadora del toxoide tetánico y otra de toxoide diftérico. La vacuna de 23 antígenos se recomienda en niños con edad igual y mayor de 24 meses, con alto riesgo para enfermedad neumocócica invasiva y complicaciones, debidas a enfermedades subyacentes y se administra en esquema mixto con vacunas anti neumocócica conjugadas. En 2002, la Organización Mundial de la Salud determinó que la vacuna anti neumocócica heptavalente (Prevenar® 7) es el estándar de oro, con la cual debían ser comparada toda nueva vacuna conjugada, por lo que definieron, necesarios para su aprobación, dos criterios de no inferioridad. Primer criterio: Una vez administrada la vacuna se registren títulos de anticuerpos medidos por ELISA iguales o mayoresde 0,35 μg/mL para los serotipos comunes a ambas vacunas y los adicionales. Segundo criterio: Los anticuerpos deben tener capacidadfuncional, lo cual se establece mediante la cuantificación de la actividad opsonofagocítica que debe ser igual o mayor de 1:8. Las vacunas conjugadas 10valente (Synflorix®) y 13 valente (Prevenar® 13) cumplen ambos criterios. De no ser posible completar el esquema o administrar refuerzo, con el mismo tipo de vacuna conjugada inicial, puede hacerse con cualquier otra vacuna

Several vaccines against Streptococcus pneumoniae are available. One made of capsular polysaccharides with 23 antigens and the conjugated vaccines, thus denominated, because the polysaccharides are conjugated to a nontoxic mutant of the diphteric toxin or to the D protein of the nontipificable Haemophilus influenzae, to a transporting protein of tetanic and diphteric toxoids. The 23 antigens vaccine is recommended for children 24 months of age and older, with high risk for invasive pneumococcal disease and complications due to underlying diseases. It is administered in a mixed scheme with anti pneumococcal conjugated vaccines. In 2002, the World Health Organization (WHO) determined that the heptavalent vaccine (Prevenar® 7) is the gold standard, with which all new conjugated vaccineshould be compared. For this reason, they defined two non inferiority criteria as necessary for the approval. First criterion: Once administered the vaccine and measured the amount of antibodies by ELISA, these must be equal or above 0.35 μg/mL for the common serotypes to both vaccines and to the additional serotypes. Second criterion: The antibodies must have functional capacity, which is determined by the opsonophagocitic activity that must be equal or greater than 1:8. The 10 valent (Synflorix®) and the 13 valent(Prevenar® 13) conjugated vaccines fulfill both criteria. If it is not possible to complete the vaccine scheme or to administer a booster dose, with the same type of conjugated vaccine, this may be done with any other vaccine

Semilunar flotante: tratamiento artroscopico: reporte de un caso y revision de la bibliografia / Floating lunate: arthroscopic treatment: case report and bibliography review

La asistencia artroscópica ha beneficiado de manera significativa el diagnóstico y tratamiento de la inestabilidad carpiana. Presentamos un caso clínico en donde se combinan dos lesiones ligamentarias carpianas, la lesión del ligamento escafo-lunar y la del luno-piramidal. Ambas corresponden a lesiones pre-dinámicas y de grado III según la clasificación de Geissler. Describimos el tratamiento quirúrgico en donde se realizó en forma artroscópica termo contracción y fijación temporaria con clavijas. Pasados dos años de seguimiento no se han observado nuevos signos de inestabilidad ni dolor residual.(AU)

Fracturas del escafoides carpiano: tratamiento percutaneo bajo asistencia artroscopica / Scaphoid fractures: percutaneous treatment with arthroscopic assistance

La consolidación del escafoides carpiano puede ser alterada por múltiples factores, aún en fracturas con mínimo desplazamiento y biomecánicamente estables. La ténica de fijación percutánea reduce el daño vascular y de los ligamentos cardinales de la muñeca, acortando los tiempos de consolidación, inmovilización e incapacidad laboral y/o deportiva. Este enfoque obliga a precisar el diagnóstico de las lesiones asociadas, que en caso de existir, influirían negativamente sobre el resultado final del tratamiento. La artroscopía, por tanto, se ha convertido en un elemento valioso para el tratamiento quirúrgico de las fracturas del escafoides carpiano y sus lesiones asociadas.(AU)

Inmunizaciones: [revisión] / Immunizations: [review]

Los avances en la prevención de la enfermedad diarreica aguda con el uso de vacunas orales están presentes gracias a las investigaciones en el área de los trabajos realizados en cólera, fiebre tifoidea y con más éxito en la prevención de la diarrea por rotavirus. en este consenso desarrollamos los elementos actualizados en la inmunización contra cólera, fiebre tifoidea, indicaciones y futuras vacunas. en especial, se hace referencia a la vacunación contra rotavirus, sus estudios iniciales, evaluación de la investigación en fase III (realizada en Venezuela), las características particulares de cada vacuna desarrollada y en uso hoy en día, su aplicación y seguimiento una vez iniciado el plan nacional de vacunación, finalizando con los estudios de impacto económico y costo-efectividad.

Advances in prevention of acute diarrheal disease with the use of oral vaccines have been accomplished thanks to research in cholera, typhoid fever and, with more success, in the prevention of rotavirus diarrhea. This consensus addresses updates in immunization against cholera, typhoid fever, indications and future vaccines. In particular, we refer to vaccinations against rotavirus, their initial studies, research evaluation in phase III (held in Venezuela), particular characteristics of each vaccine developed and in use today, and the follow up of its implementation once the national vaccination plan is initiated. Final considerations in relation to the economic impact and cost effectiveness studies are stated.

Semilunar flotante: tratamiento artroscopico: reporte de un caso y revision de la bibliografia / Floating lunate: arthroscopic treatment: case report and bibliography review

La asistencia artroscópica ha beneficiado de manera significativa el diagnóstico y tratamiento de la inestabilidad carpiana. Presentamos un caso clínico en donde se combinan dos lesiones ligamentarias carpianas, la lesión del ligamento escafo-lunar y la del luno-piramidal. Ambas corresponden a lesiones pre-dinámicas y de grado III según la clasificación de Geissler. Describimos el tratamiento quirúrgico en donde se realizó en forma artroscópica termo contracción y fijación temporaria con clavijas. Pasados dos años de seguimiento no se han observado nuevos signos de inestabilidad ni dolor residual.

Fracturas del escafoides carpiano: tratamiento percutaneo bajo asistencia artroscopica / Scaphoid fractures: percutaneous treatment with arthroscopic assistance

La consolidación del escafoides carpiano puede ser alterada por múltiples factores, aún en fracturas con mínimo desplazamiento y biomecánicamente estables. La ténica de fijación percutánea reduce el daño vascular y de los ligamentos cardinales de la muñeca, acortando los tiempos de consolidación, inmovilización e incapacidad laboral y/o deportiva. Este enfoque obliga a precisar el diagnóstico de las lesiones asociadas, que en caso de existir, influirían negativamente sobre el resultado final del tratamiento. La artroscopía, por tanto, se ha convertido en un elemento valioso para el tratamiento quirúrgico de las fracturas del escafoides carpiano y sus lesiones asociadas.

Tratamiento artroscopico de la osteoartrosis de rodilla en pacientes mayores de 60 años / Arthroscopic treatment of knee osteoarthritis in patients over 60 years old

Objetivo: El proposito de este trabajo fue evaluar retrospectivamente el efecto del tratamiento artroscopico de la osteoartritis de rodillaen un grupo de pacientes mayores de 60 años. Material y metodos: Se analizaron retrospectivamente 56 pacientes con diagnostico de artrosis de rodilla tratados mediante un debridamiento artroscopico de la articulacion. El seguimiento promedio de 52 meses y la edad de los pacientes fue de 69 años promedio (rango 61-80), incluyendo 38 de sexo masculino y 18 de sexo femenino. Esta poblacion se dividio en 2 grupos: un grupo de pacientes con artrosis de rodilla mas una lesion meniscal aguda y otro con lesion degenerativa articular de larga evolucion. Se realizo una evaluacion subjetiva de la rodilla mediante la escala del Lysholm en el preoperatorio y en el ultimo control. Resultados: En el grupo de pacientes con lesion meniscal aguda se observo una mejoria de la sintomatologia en el 65 por ciento de los casos luego del tratamiento artroscopico, mientras que aquellos pacientes con lesiones degenerativas cronicas mejoraron solo el 23 por ciento de los mismos. Conclusion: El debridamiento artroscopico en pacientes mayores con osteoartrosis de rodilla y lesion meniscal aguda podria tener algun beneficio en un grupo de pacientes seleccionados