Ricardo C Sampaio

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BACKGROUND AND PURPOSE Posterior reversible encephalopathy syndrome (PRES) is typically characterized by headache, altered mental functioning, seizures, and visual loss associated with imaging findings of bilateral subcortical and cortical edema with a predominantly posterior distribution. Our goal was to determine whether fluid-attenuated inversion(More)
Tunnel enlargement after anterior cruciate ligament (ACL) reconstruction may compromise revision surgery. The cause of this tunnel enlargement is not yet fully understood, but it is thought to be multifactorial, with biomechanical and biological factors playing a role. Tunnel enlargement has been described particularly in patients who underwent ACL(More)
ANTHONY B. RYLANDS*, ECKHARD W. HEYMANN, JESSICA LYNCH ALFARO, JANET C. BUCKNER, CHRISTIAN ROOS, CHRISTIAN MATAUSCHEK, JEAN P. BOUBLI, RICARDO SAMPAIO and RUSSELL A. MITTERMEIER Conservation International, Arlington, VA, USA Department of Behavioral Ecology and Sociobiology, German Primate Center, Leibniz Institute for Primate Research, G€ ottingen, Germany(More)
To compare the femoral and tibial components rotational alignment in total knee arthroplasty (TKA) performed either with conventional or with patient-specific instrumentation. Forty-five patients underwent primary TKA and were prospectively randomized into two groups: 22 patients into the conventional instrumentation group (group A) and 23 patients into the(More)
Recently, the use of hamstring tendons in anterior cruciate ligament repair has been increasing. However, tendon-to-bone healing occurs slowly, which can be a problem to an early return to sport activities. The use of growth factors from platelets seems to improve tissue healing. We enrolled 40 patients in a prospective study that were submitted to an(More)
The purpose of this study was to compare the transtibial reconstruction technique of the anterior cruciate ligament (ACL) with the anteromedial (AM) portal technique in their ability to place the femoral and tibial tunnels within the ACL footprints. Forty patients were sequentially enrolled in two different surgical techniques, 20 patients in the(More)
Cruz Lima’s saddle-back tamarin Saguinus fuscicollis cruzlimai Hershkovitz, 1966, was described from a painting by Eládio da Cruz Lima in his book Mammals of Amazonia, Vol. 1, Primates (1945). The painting was of four saddle-back tamarins from the upper Rio Purus, one of them distinct and the inspiration for Hershkovitz to describe it as a new subspecies.(More)
To describe agenesis of the anterior cruciate ligament (ACL) with an anterior lateral meniscofemoral ligament. Case report of a 13-year-old girl with an absent ACL and with an anterior lateral meniscofemoral ligament instead, as well as absence of the anterior insertion of the lateral meniscus in the tibia and a discoid ring-like lateral meniscus, with(More)
Both forest fragmentation and overhunting have profound effects on the structure of large-vertebrate assemblages in neotropical forests. However, the long-term value of habitat fragments for forest mammals remains poorly understood and few regional scale studies have replicated sampling across spatially independent landscapes. Here, we assess the species(More)
PURPOSE To evaluate prospectively if the impaction of a bone dowel in the tibial tunnel prevents the tunnels from enlarging beyond their original diameter. METHODS Seventeen patients underwent arthroscopically assisted ACL reconstruction with hamstring autologous graft. All patients underwent CT of the knee on the day of surgery, at 3 months and 12 months(More)