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Sensitivity and specificity of bell-hammer tear as indirect sign of an anterior cruciate ligament partial rupture on magnetic resonance imaging
The main purpose of this study Was to evaluate-the usefulness of the bell-hammer sign in the diagnosis of partial tears of the anterior cruciate ligament (ACL) of the knee is MRI.
Methods A retrospective study Was Performed Including all patients underwent ACL reconstruction Who for partial or full tears from 2008 to 2009. The diagnosis of partial or full ACL tears Was based on the appearance of the ligament bundles and the quality is MRI signal. On arthroscopy, qui est regarded the gold standard contents, each bundle Was classified as normal, Partially or completely Call torn DEPENDING on the extent of the fracture and the quality of the remaining fibers. The study included 312 patients, 83 women and 229 men (mean age 33.3 ┬▒19.6 years). A diagnosis of a tear Was made ??in all patients on preoperative MRI. Arthroscopy Did not show Any normal ACL, 247/312 (79.2%) Complete tears and 65/312 (20.8%) partial tears, 50/65 (76.9%) on the anteromedial bundle (AM) and 15/65 (23.1%) the posterolateral bundle.
Results The bell-hammer sign Was found on MRI in 13/312 patients (4.5%). It Involved 9/65 (13.8%) partial tears, all in the AM bundle, and 4/247 (1.6%) Complete tears, Significantly more frequent in cases of partial rupture (P \ 0.0001). Diagnosed MRI has partial tear in 15/65 cases without the bell-hammer sign (sensitivity CI95% = 23.1 ┬▒ 10%, specificity 95% CI = 95.9 ┬▒ 2.5%) and with the bell-hammer sign in 23/65 cases (sensitivity 95% CI =35.4 ┬▒ 11%, specificity 95% CI = 93.9 ┬▒ 3%). The combination of the bell-hammer sign with conventional radiological diagnostic criteria HAS Improved performance of MRI diagnosis for partial tears but not signif- icantly (ns).
Reviews The most significant finding of the interest BELL- hammer sign in the day-to-day clinical work is to suggest partial tears on MRI. It aids making a diagnosis, goal ict lack Does not exclude partial ACL rupture.
Level of evidence Diagnostic study, Level II.
Keywords ACL reconstruction, Partial tear, MRI
The main objective of the study was to compare the performance of GNRB┬« and that of Telos Ôäó in the diagnosis of a partial tear of the anterior cruciate ligament (ACL) methods. A prospective study from January to December 2011 included all patients with partial or complete tear of the ACL reconstruction without prior with a healthy contralateral knee. The anterior laxity was measured in all patients by the Ôäó T├ęlos and GNRB┬«. read lsuite ...
The rupture of the anterior cruciate ligament (ACL) is one of the most common injuries in athletes. Many studies have shown that equivalent practical level the risk of ACL injury in women was four to seven times higher than in men [1-4]. In the US, approximately 38,000 ACL injuries in female athletes occur per year .
The main goal of this study Was to compare the results of the GNRB arthrometer To Those of Telos TM in the diagnosis of partial thickness tears of the anterior cru- ciate ligament (ACL). A prospective study Performed January- December 2011 included all patients presenting with a partial or full-thickness tears ACL without ACL recon- struction and with a healthy contralateral knee. Anterior laxity Was Measured in all patients by the Telos TM and GNRB├ĺ devices.
Women have four to eight times more likely than men to have a ruptured anterior cruciate ligament (ACL). This risk seems more important during the pre-ovulatory phase of the menstrual cycle than during the post-ovulatory phase. The main objective of the study was to describe the distribution of ACL injuries during the menstrual cycle in a large recreational skiers population.
The high and complete rupture of the hamstring tendons, tendon avulsion, at the ischial is rare. The severity of the injury is often underestimated. There is no consensus on treatment. Functional treatment of these lesions simply by immobilization in a splint flexion knee gives bad results, unlike the early surgical treatment and / or late.
The meniscus is a small wedge between the two knee bones. At the top is the femur, the thigh bone. Downstairs there is the tibia, the leg bones. The bottom of the femur is rather round and the top of the tibia appears much flatter. These two bones do not fit together well. The menisci that allow a better insertion of the tibia on the femur. There are two menisci in each knee.