ABSTRACT
Introduction: Meniscal tears are commonly encountered in clinical practice and cause significant musculoskeletal morbidity. Most of the data available on Morphometry of menisci in Indian population are through cadaveric studies and very few MRI studies are available to substantiate the available data. Aim of the study: To gather data on the Morphometry of menisci in South Indian population and compare it with the existing literature. Material and Method: 100 MRI images collected retrospectively were used to study menisci. Height and width of MM and LM were measured both in sagittal and coronal planes. Results: It was observed that in both sexes the height of the Anterior horn of Medial meniscus was significantly higher than that of Lateral meniscus. Width of the Anterior horn and body showed significantly higher values in Lateral meniscus whereas width of Posterior horn of Medial meniscus showed significantly higher values in both sexes. Height of Medial meniscus in all the segments was higher in males though the difference was significant only in anterior horn and Posterior horn segments. Height of Lateral meniscus was significantly higher in males in all the segments. Conclusion: Results of this study will add to the existing literature on the Morphometry of menisci and will serve as a database for patients undergoing meniscal allografts.
ABSTRACT
Introducción: El objetivo de este trabajo fue analizar la reproducibilidad intra e interobservador de la clasificación de lesiones meniscales de Sociedad Internacional de Artroscopía, Cirugía de la Rodilla y Medicina Deportiva (ISAKOS). Materiales y Métodos: Se utilizó la clasificación artroscópica de lesiones meniscales creada por la ISAKOS. Se seleccionaron y se analizaron 31 videos artroscópicos de cirugías realizadas en el Hospital Italiano de Buenos Aires. Los mismos fueron evaluados por 3 traumatólogos (2 especialistas en cirugía de rodilla y un becario de postgrado), en dos ocasiones con un intervalo de 30 días. Se utilizó el índice de Kappa de Cohen para evaluar la reproducibilidad intraobservador y el coeficiente de correlación intraclase para la reproducibilidad interobservador. Resultados: La reproductibilidad promedio intraobservador fue para el primero de 51%, para el segundo de 65% y para el tercero de 58%, alcanzando un acuerdo moderado según la categorización del coeficiente de Kappa utilizada por Landis y Koch. Con respecto a la reproductibilidad interobservador, se obtuvo una concordancia buena (ICC=0,71), según el Coeficiente de correlación intraclase. Todos los cálculos fueron estadisticamente significativos. (p<0,05). Conclusión: Si bien esta clasificación permite una detallada descripción de las lesiones meniscales, la reproductibilidad intraobservador no alcanzo los valores óptimos a pesar de haber obtenido en promedio un acuerdo moderado. Por otro lado, la reproductibilidad interobservador demostró en promedio resultados mayores al 70% (concordancia buena), con lo cual podemos afirmar que el acuerdo y reproductibilidad interobservador es aceptable. Tipo de trabajo: Observacional, descriptivo de tipo diagnóstico. Nivel de Evidencia: IV
Objectives: To analyze the intra and interobserver reliability of the International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS) classification for meniscal tears. Methods: The arthroscopic classification for meniscal lesions created by the ISAKOS was used. Thirty-one arthroscopic videos with different meniscal tear characteristics were analyzed by three orthopedic surgeons (two specialists in knee surgery and a fellow), twice at an interval of 30 days. The Kappa Coefficients (k) was used to assess the intraobserver reliability and intraclass correlation coefficient (ICC) for interobserver reliability. Results: The average intraobserver reliability was 51% for the first observer, 65% for the second and 58% for the third, reaching moderate agreement according to the Kappa coefficient used by Landis and Koch. Regarding interobserver reliability, good agreement (ICC = 0.71) was obtained for the intraclass correlation coefficient. The whole results were statistically significant (p <0.05). Conclusion: While this classification provides a detailed description of meniscal lesions, the intraobserver reliability did not reach the optimum values obtained despite having on average a moderate agreement. However interobserver reliability showed on average agreement of 70% (good agreement), which can affirm that the agreement and interobserver reliability is acceptable. Type of Study: Observational, descriptive, a diagnostic study. Level Of Evidence: IV
Subject(s)
Humans , Knee Joint , Arthroscopy , Menisci, Tibial/injuries , Knee Injuries/classification , Reproducibility of Results , Observer VariationABSTRACT
Background: Magnetic resonance imaging (MRI) has been recognized as the imaging method for non-invasive evaluation of knee pathology, particular meniscus and ligaments. Objective: Compare the sensitivity, specificity, and accuracy of MRI in the detection of meniscal tears with arthroscopy. Material and methods: Twenty-seven patients who were diagnosed as meniscal tear on arthroscopy with preoperative MRI were included in this study between January 2003 and June 2008. MRI was performed with a 1.5 Tesla Signa Horizon Echospeed MRI for eight patients between January 2003 and June 2005 and a 1.5 Tesla Signa Excited HD MRI for nineteen patients between July 2005 and June 2008. The location of meniscal tear was evaluated by studying three areas: anterior horn, body and posterior horn. Sensitivity, specificity, accuracy, positive predictive value (PPV), and negative predictive value (NPV) of the anterior horn, body, posterior horn and overall meniscus were calculated. Results: The sensitivity of MRI for detecting meniscal tears at the anterior horn, body, posterior horn, and overall medial meniscus was 42.9%, 87.5%, 94.1%, and 81.3%, respectively. The specificity was 95.0%, 84.2%, 81.8%, and 88.0%, respectively. The accuracy was 81.5%, 85.2%, 89.3%, and 85.4%, respectively. The PPV was 75.0%, 70.0%, 88.9%, and 81.2%, respectively. The NPV was 82.6%, 94.1%, 90.0%, and 88.0%, respectively. The sensitivity of MRI for detecting meniscal tears at the anterior horn, body, posterior horn and overall lateral meniscus was 0%, 100%, 85.7%, and 80.0%, respectively. The specificity was 100%, 100%, 90.5% and 97.2%, respectively. The accuracy was 96.0%, 100%, 90.5%, and 97.2%, respectively. The PPV was 100%, 75% and 80%, respectively. The NPV was 96.3%, 100%, 95.0%, and 97.2%, respectively. Conclusion: MRI is a helpful technique to detect meniscal tear with different sensitivity and accuracy on the meniscal location
ABSTRACT
The accuracy of joint line tenderness in the diagnosis of meniscal tears was assessed in 129 knees. Arthroscopy was performed in each case to establish the diagnosis. The diagnosis was correct in 100 knees (77.5%) and incorrect in 29 (22.5%). A preoperative diagnosis of a medial meniscal tear was made in 63 knees and confirmed in 46 (73%) at arthroscopy. There were 46 true-positive, 17 false-positive, four false-negative and 62 true-negative results for the medial side. A lateral meniscal tear was suspected in 45 knees and confirmed in 39 (86.7%). Thus, 39 true-positive, six false-positive, two false-negative, and 82 true-negative interpretations were found. In this study, joint line tenderness as a test for lateral meniscal tears was accurate (93%), sensitive (95%), and specific (93%), but for medial tears the rates were lower.
La precisión del dolor en la línea de la articulación a la hora de hacer el diagnóstico del desgarro meniscal fue evaluada en 129 rodillas. En cada uno de los casos se realizó una artroscopia a fin de determinar el diagnóstico. El diagnóstico fue correcto en 100 rodillas (77.5%) e incorrecto en 29 (22.5%). Se llevó a cabo un diagnóstico preoperatorio del desgarramiento meniscal medial en 63 rodillas, confirmado en 46 (73%) por artroscopia. Hubo 46 resultados verdadero-positivos, 17 falsopositivos, 4 falso-negativos y 62 verdadero-negativos para el lado medial. Se sospechó un desgarro meniscal lateral en 45 rodillas, y se confirmó en 39 (86.7%). Por consiguiente, se hallaron 39 interpretaciones verdadero-positivas, 6 falso-positivas, 2 falso-negativas, y 82 verdadero-negativas. En este estudio, el dolor en la línea de la articulación como prueba para el desgarro meniscal lateral fue preciso (93%), sensible (95%), y específico (93%), pero para el desgarro medial los índices fueron más bajos.
Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Physical Examination , Menisci, Tibial/injuries , Knee Injuries/diagnosis , Arthroscopy , Diagnosis, Differential , False Negative Reactions , False Positive Reactions , Sensitivity and SpecificityABSTRACT
Tentative diagnosis of meniscal pathology is very helpful for the successful operative management including arthroscopy. Conventional arthrography has long been used to meet this purpose, but it has some limitations due to complex views and some difficulties in imaging the whole anatomical structures. Recent diagnostic advancement produced post-arthrographic HRCT and MRI for the compensation of these problems of conventional arthrography. Arthrography and post-arthrographic HRCT has been carried out on 49 knees in 43 patients. 38 knees among them could be confirmed by arthroscopy and following results were obtained. 1. Diagnostic accuracies of post-arthrographic HRCT for medial and lateral meniscal injuries of knee were 94.7% and 92.1% repectively. 2. Shape, contour of torn meniscus and the relationships between the torn fragments were better demonstrated with HRCT. 3. Horizontal tear could also be suspected by HRCT. 4. Peripheral detachment could be differentiated with synovial recess on the HRCT, especially in the reformat view, but was more clearly visible in arthrography. 5. Arthrography and HRCT can be used as a good complementary study for the evaluation of meniscal injuries.